X-ray C-arm workstations · OEC C ARM family

GE Healthcare 9800: troubleshooting and error codes

The ServiceForge knowledge base holds 511 documented symptoms for the GE Healthcare 9800, with 886 ranked causes, 860 diagnostic checks with test points and expected values, and 80 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

Orbital motion fails or runs intermittently

C-arm orbital motion does not operate or operates sporadically

Ranked causes

1. RUI not properly connected to C-Arm keyswitch panel, or damaged RUI connector (common)
2. Orbital clutch released or damaged (occasional)
3. Orbital position-reporting potentiometer damaged or drive belt broken (occasional)
4. System out of calibration (occasional)
5. Faulty orbital gearbox (occasional)
6. Faulty orbital motor (occasional)
7. Faulty orbital servo drive (occasional)
8. Faulty MCU (rare)
9. Broken or damaged orbital drive belt (occasional)

9 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Motorized rotation fails or runs intermittently

C-arm rotational motion does not operate or operates sporadically

Ranked causes

1. RUI not properly connected to C-Arm keyswitch panel, or damaged RUI connector (common)
2. Rotational position-reporting potentiometer damaged or drive belt broken (occasional)
3. System out of calibration (occasional)
4. Faulty rotational gearbox (occasional)
5. Faulty rotational motor (occasional)
6. Faulty MCU (rare)
7. Faulty rotational servo drive (occasional)

7 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

No +60-Volt output from PS4 power supply

Power supply PS4 does not provide required +60V output

Ranked causes

1. Motor Power Relay PCB failure (common)
2. Cable failure between Power Motor Relay PCB and PS4 (occasional)
3. No AC power to PS4 input (occasional)
4. PS4 power switch set to OFF (occasional)
5. Motor power fuse open (common)
6. Ground or connector cable 902272 failure (occasional)
7. PS4 power supply failure (rare)

7 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Battery charger inoperative high voltage

Charger does not operate or maintain battery voltage

Ranked causes

1. Workstation disconnected from AC line or AC line down (common)
2. Workstation Interconnect Cable disconnected from C-Arm (common)
3. Fuse blown or Battery Charger failed (occasional)
4. Instantaneous peak charging current exceeds 15.5 amps causing Overcurrent shutdown (occasional)
5. Output voltage exceeds 250V causing Overvoltage shutdown (occasional)
6. CHG_DISAB signal asserted by X-Ray Controller (common)

First check

Verify AC power to Workstation

Test point: AC input to Workstation
Expected: 115VAC present

1 more check with pass and fail actions, 6 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

C-arm completely inoperative with battery charger light ON

C-Arm does not respond to commands, no error messages displayed, but battery charger indicator lamp is illuminated

Ranked causes

1. Buzzer sounds when Workstation switched on due to incorrect Isolation Transformer tap settings (occasional)
2. No Key Power (unknown)
3. Loose connectors on Power/Signal Interface PCB (common)
4. Blown fuse F6 or F10 on Power/Signal Interface PCB (common)
5. DC power distribution problem (occasional)
6. Defective Relay K10 in Power/Motor Relay PCB (rare)

First check

Listen for buzzer sound when Workstation is switched on

Test point: Workstation power switch
Expected: No buzzer sound or buzzer indicates alarm condition only

3 more checks with pass and fail actions, 6 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Flat Panel Display screen is dark, distorted, or shows solid color

Video display is completely dark, image is distorted, or entire screen shows single color

Ranked causes

1. Display monitor power switch off or switches in wrong state (common)
2. Incorrect monitor control settings (common)
3. Defective video cable or connections (occasional)
4. Faulty power input to Flat Panel Display (occasional)
5. Faulty graphics card or motherboard in Navigation Computer (rare)
6. Failure of Flat Panel Display (rare)

6 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Navigation Computer has no power input high voltage

Navigation Computer not receiving AC or DC power. Monitor and system not operational.

Ranked causes

1. Workstation power failure (common)
2. Faulty power cable to Navigation Computer (common)
3. Faulty PS4 power supply (occasional)
4. UPS battery faulty or disconnected (occasional)
5. AC Fail cable disconnected (occasional)
6. Auxiliary Power Control PCB failure (rare)

6 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

No image displayed on Color FPD caution

Color Flat Panel Display shows no video output; screen remains blank or off

Ranked causes

1. Display power off or video source inactive (common)
2. Video source inactive or not transmitting (common)
3. Loose video interface connector or pin contact failure (common)
4. Faulty or damaged video cabling (occasional)
5. AC power not reaching DC power supply (occasional)
6. DC power supply output failure (occasional)

First check

Verify FPD display power is on

Test point: FPD power switch and indicator
Expected: Display powered ON with visible power indicator
Tools: Visual inspection

5 more checks with pass and fail actions, 6 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Orbital servo checksum error

MCU detects checksum error in Logosol orbital servo control module during bootup

Ranked causes

1. Faulty orbital servo controller or related circuitry (unknown)
2. Faulty orbital motor (unknown)
3. Faulty wiring to orbital motor (unknown)
4. Faulty motion power supply (PS4) (unknown)
5. Faulty wiring to PS4 (unknown)
6. Faulty orbital position reporting potentiometer (unknown)

6 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Orbital servo position error

MCU detects position error in Logosol orbital servo control during operation

Ranked causes

1. Faulty orbital servo controller or related circuitry (unknown)
2. Faulty orbital motor (unknown)
3. Faulty wiring to orbital motor (unknown)
4. Faulty motion power supply (PS4) (unknown)
5. Faulty wiring to PS4 (unknown)
6. Faulty orbital position reporting potentiometer (unknown)

6 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Rotation servo checksum error

MCU detects checksum error in Logosol rotation servo control module during bootup

Ranked causes

1. Faulty rotation servo controller or related circuitry (unknown)
2. Faulty rotation motor (unknown)
3. Faulty wiring to rotation motor (unknown)
4. Faulty motion power supply (PS4) (unknown)
5. Faulty wiring to PS4 (unknown)
6. Faulty rotation position reporting potentiometer (unknown)

6 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Rotation servo position error

MCU detects position error in Logosol rotation servo control during operation

Ranked causes

1. Faulty rotation servo controller or related circuitry (unknown)
2. Faulty rotation motor (unknown)
3. Faulty wiring to rotation motor (unknown)
4. Faulty motion power supply (PS4) (unknown)
5. Faulty wiring to PS4 (unknown)
6. Faulty rotation position reporting potentiometer (unknown)

6 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Workstation boots but nothing on C-arm. Battery Charger Light ON high voltage

Workstation operating but C-arm non-responsive with charger light illuminated

Ranked causes

1. Blown fuse F6 or F10 on Power/Signal Interface PCB (occasional)
2. DC power distribution problem (occasional)
3. Defective Relay K10 in Power/Motor Relay PCB (occasional)
4. Power Signal Interface problem (occasional)
5. Fast stop buttons or wiring open (occasional)
6. F10 Fuse on Power/Signal Interface PCB (occasional)

6 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Battery charger inoperative high voltage

Workstation unable to charge battery; charger not functioning

Ranked causes

1. Workstation disconnected from AC line or AC line down (common)
2. Workstation Interconnect Cable disconnected from C-Arm (common)
3. Fuse blown or Battery Charger failed (occasional)
4. Instantaneous peak battery charging current exceeds 15.5 amps (occasional)
6. X-Ray Controller asserts CHG_DISAB signal during normal operation (common)

First check

Verify AC power is present at Workstation

Test point: AC inlet
Expected: AC line present and stable

5 more checks with pass and fail actions, 6 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Battery charger light is OFF with Workstation off

Battery charger indicator lamp on C-Arm Interface Panel does not illuminate when Workstation is powered off

Ranked causes

1. Workstation power problem (common)
2. Wrong power cord voltage (occasional)
3. Loose connectors (common)
4. Power Control PCB jumper E1 set to wrong position (occasional)
5. Blown fuse F4 on Power/Signal Interface PCB (common)

First check

Verify Workstation power and interconnect cables are plugged in

Test point: Workstation power inlet, interconnect cable connector
Expected: Cables fully inserted and seated

5 more checks with pass and fail actions, 5 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Battery charger light OFF when workstation powered off

With Workstation in OFF state, battery charger indicator light is not illuminated.

Ranked causes

1. Workstation power problem (common)
2. Wrong voltage input for system (occasional)
3. Loose connectors on PCB (occasional)
4. Power Control PCB jumper E1 incorrect setting (occasional)
5. Blown fuse F4 on Power/Signal Interface PCB (occasional)

5 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Cine disk communication failure

Cine prepare fails or does not complete successfully; fibre channel communications not established

Ranked causes

1. Fibre Channel cables reversed at backplane connection (common)
2. Fibre Channel cables failed (occasional)
3. Power not connected to disk backplane (common)
4. Cine Bridge PCB failed (occasional)
5. One cine disk failure (occasional)

First check

Check LED indicators on Cine Bridge PCB at boot-up

Test point: green LED indicators on Cine Bridge PCB
Expected: LEDs flicker during boot-up

3 more checks with pass and fail actions, 5 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Filament voltage error patient safety

Wrong filament voltage applied to tube; mA output will also be incorrect

Ranked causes

1. Filament B plus wrong (common)
2. Wrong duty ratio of filament drive pulses (common)
3. Wrong filament selected (occasional)
4. Failure of filament regulation (occasional)
5. Sensor gain wrong (rare)

First check

Measure filament voltage at FIL_VOLT relative to FIL_VOLT_REF

Test point: FIL_VOLT and FIL_VOLT_REF on Generator Driver PCB
Expected: FIL_VOLT equals FIL_VOLT_REF or expected voltage for selected filament

2 more checks with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Flat Panel Display screen is blank high voltage

Display shows no image or backlight. Screen completely dark or inactive.

Ranked causes

1. Display control switches not correctly set (common)
2. No AC power to workstation (common)
3. Faulty power cable to FluoroTrak display power supply (common)
4. FluoroTrak power supply PS3 failure (occasional)
5. Faulty cable in A-Arm display connection (occasional)

5 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

No filament voltage observed high voltage

Filament voltage reading is zero at FIL_VOLT on Generator Driver PCB

Ranked causes

1. No FIL_B_PLUS voltage (common)
2. No filament drive signals present (common)
3. Faulty or shorted filament voltage sense resistors (occasional)
4. Failure of filament voltage sensor (occasional)
5. Broken connection to X-Ray Controller PCB or failure at X-Ray Controller PCB (occasional)

First check

Measure FIL_VOLT at Generator Driver PCB

Test point: FIL_VOLT on Generator Driver PCB
Expected: Non-zero voltage present for selected filament

1 more check with pass and fail actions, 3 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Workstation off, battery charger light is OFF high voltage

Battery charger light not illuminated when workstation powered off

Ranked causes

1. Workstation power problem (common)
2. 100-125V system plugged into 200-250V (occasional)
3. Loose connectors (common)
4. Power Control PCB jumper E1 set to 2800 position (rare)
5. Blown fuse F4 on Power/Signal Interface PCB (occasional)

5 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Wrong mA during shot patient safety

mA output during X-ray exposure is not at expected level for selected technique

Ranked causes

1. Incorrect filament selected (common)
2. Faulty mA sense circuit (common)
3. Tube aging (occasional)
4. kVp wrong (occasional)
5. Improper exposure setting (occasional)

First check

Verify correct filament selected via SM_FIL_ACK*

Test point: SM_FIL_ACK* signal state
Expected: Signal matches selected filament

3 more checks with pass and fail actions are in ServiceForge. Connect ServiceForge to your AI

Calibration: Collimator Alignment Verification radiation

Verify collimator iris alignment, field size diameters, and preview circle/line accuracy across normal and magnified modes using beam alignment tool and film exposure

Ranked causes

1. Collimator iris or leaves visible in fluoroscopy image (common)
2. Field diameter outside specification (common)
3. Collimator preview circles/lines misaligned (occasional)
4. Camera rotation preview symbols not functioning (occasional)

First check

Fluoro in Normal field and verify iris/leaves visibility

Test point: Image intensifier display
Expected: No collimator iris or leaves visible in image

15 more checks with pass and fail actions, 4 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Motorized movement power-on check patient safety

Boot test to verify all power is produced and distributed correctly to motorized movement system. System should remain stable with no uncommanded motions.

Ranked causes

1. No +5 Volt power to Servo (common)
2. Faulty cable or connector on cable assembly 879450 (common)
3. Faulty cable or connector on cable assembly 884705 (common)
4. Drive sensors faulty (occasional)

First check

Verify Workstation is plugged into active AC outlet

Test point: Power cord assembly
Expected: Pilot light on power cord assembly glows

6 more checks with pass and fail actions, 3 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Communication failed between Workstation and C-Arm

Workstation not communicating with C-Arm for >1 second; system finishes X-ray in progress then disables future X-rays

Ranked causes

1. Foot pedal toe-tapping causing watchdog timeout (occasional)
2. Repeated random control panel button pressing (occasional)
3. Workstation software exception or processing anomaly (occasional)
4. Corrupted persistent object files (rare)

First check

Observe foot pedal and button operation technique

Test point: Operator control
Expected: Deliberate, intentional control input

1 more check with pass and fail actions, 5 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Fans operate, but system heats up too quickly or takes longer than 20 minutes to cool off caution

Heat dissipation performance degraded; either excessive heating or slow cooling

Ranked causes

1. Screen on fan vents blocked (common)
2. Fan ducting leaks (occasional)
3. Heat Pipe mounting loose or insufficient thermal grease (occasional)
4. Heat Sink mounting loose or insufficient thermal grease (occasional)

First check

Visually inspect fan vent screens

Test point: All fan vent locations
Expected: Screens clear of blockage

3 more checks with pass and fail actions, 4 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Filament current error patient safety

Filament current reading does not match expected value for applied voltage and selected filament

Ranked causes

1. Filament aging (common)
2. Wrong filament selected (occasional)
3. Broken connection (occasional)
4. Current sense gain wrong (rare)

First check

Verify filament voltage is correct

Test point: FIL_VOLT from Generator Driver PCB
Expected: Correct voltage for selected filament and technique

2 more checks with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Filament supply voltage wrong patient safety

Filament supply voltage (FIL_B_PLUS) is not at expected level for selected filament

Ranked causes

1. Bad filament supply regulator (common)
2. Filament voltage sense divider fault (occasional)
3. Wrong filament selected (occasional)
4. Wrong duty ratio of drive pulses (rare)

First check

Measure FIL_B_SEN voltage at X-Ray Controller PCB

Test point: FIL_B_SEN analog input
Expected: Either about 160V or about 140V depending on selected filament, approximately ±20 V

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Frame sync signal test failed

MCU detects missing or open frame sync signal path, TIM SystemTime.Fsync not incrementing

Ranked causes

1. Faulty wiring between MCU and backplane (unknown)
2. Faulty wiring between camera and workstation (unknown)
3. Faulty backplane PCB (unknown)
4. Faulty MCU PCB (unknown)

4 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Front caster binds or wobbles on axle bolt caution

Front caster wheel exhibits binding, stiction or lateral play on its mounting bolt

Ranked causes

1. Worn caster bearing (common)
2. Worn caster axle bolt (common)
3. Caster contaminated by debris (occasional)
4. Caster's bearing is dry (occasional)

4 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

No filament current (filament voltage present) high voltage

Filament voltage is normal but no filament heating current flowing to tube

Ranked causes

1. Connector disconnected at Filament Driver PCB or tank (common)
2. Broken connection in cable to tank (common)
3. Filament drive wire broken (occasional)
4. Filament current sense circuit fault (occasional)

First check

Verify P3 and P1 connectors are properly seated

Test point: P3 at Filament Driver PCB; P1 at tank A9J1
Expected: Connectors fully inserted and locked

1 more check with pass and fail actions, 3 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Tracking inactive error at boot patient safety

SNS boots to Visualization screen then displays 'WARNING: Tracking Inactive. System can only be used to perform surgical planning.'

Ranked causes

1. Incorrect boot process (unknown)
2. Incorrect power input to FluoroTrak Unit (unknown)
3. Serial cable connection fault between FluoroTrak Unit and Navigation computer (unknown)
4. Calibration and verification functional test failure (unknown)

First check

Boot process function

Test point: SNS startup sequence
Expected: System boots without errors to Visualization screen

3 more checks with pass and fail actions, 4 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Wrong filament current observed (voltage correct) patient safety

Filament current reading is incorrect for applied filament voltage

Ranked causes

1. Incorrect filament selected (common)
2. Faulty filament current sense resistor (common)
3. Filament regulator faults (occasional)
4. Tube aging (occasional)

First check

Measure filament current via true RMS sensing circuit

Test point: FIL_CUR signal from Generator Driver PCB
Expected: Current in expected range for selected filament and technique

3 more checks with pass and fail actions are in ServiceForge. Connect ServiceForge to your AI

Wrong filament voltage observed patient safety

Filament voltage measurement is not in expected range for selected filament and technique

Ranked causes

1. Incorrect FIL_B_PLUS voltage (common)
2. INV_B_PLUS voltage low (common)
3. Faulty or disconnected filament voltage sense resistor (occasional)
4. Incorrect filament selected (occasional)

First check

Measure filament voltage via true RMS sensing circuit

Test point: Filament voltage output from true RMS circuit on Generator Driver PCB
Expected: Expected range for selected filament and technique

2 more checks with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Boot-up fails with no error message

System fails to complete boot sequence with no error display

Ranked causes

1. Unseated PCBs (common)
2. Loose cable connectors (common)
3. Incorrect CMOS settings (occasional)

3 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

C-arm completely inoperative with battery charger light ON high voltage

C-arm system is not operational and does not respond. Battery charger indicator light is illuminated.

Ranked causes

1. Buzzer sounds - incorrect isolation transformer tap setting (occasional)
2. No Key Power (occasional)
3. Loose connectors on Power/Signal Interface PCB (occasional)

3 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

C-arm completely inoperative; no error messages; battery charger light is ON high voltage

C-arm non-responsive with charger light illuminated

Ranked causes

1. Incorrect tap settings on Isolation Transformer (occasional)
2. No Key Power (rare)
3. Loose connectors (common)

3 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

C-Arm wheels do not roll smoothly caution

Wheels exhibit binding, vibration, or rough movement when pushed

Ranked causes

1. Wheel damage or debris (occasional)
2. Caster bearing failure (occasional)
3. Wheel insecurely attached to caster (occasional)

First check

Visually inspect C-Arm wheels for damage

Test point: C-Arm wheels
Expected: No visible damage, cracks or flat spots

3 more checks with pass and fail actions, 3 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

CCD Camera cooling not functioning

Cooling system fails to maintain proper temperature control for CCD camera

Ranked causes

1. No power at TEC (Thermoelectric Cooler) (common)
2. No +5VDC output from Fluoro Functions PCB (common)
3. No +12VDC at Power/Motor Relay PCB output (occasional)

First check

Measure power at TEC

Test point: TEC power input
Expected: Power present

4 more checks with pass and fail actions, 7 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Cine Bridge PCB green LED indicators do not flicker at boot-up

Green LED indicators on Cine Bridge PCB remain static during system boot; indicates possible cable or PCB failure

Ranked causes

1. Fibre Channel cables installed backwards (common)
2. Fibre Channel cables damaged or failed (occasional)
3. Cine Bridge PCB failure (occasional)

First check

Inspect and verify Fibre Channel cable orientation

Test point: Fibre Channel connections at 2-Disk or 4-Disk Backplanes
Expected: Cables in correct orientation

2 more checks with pass and fail actions, 3 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Data error in system memory

System detects data error (invalid ABS table write/read, corrupted non-volatile memory, or software problem); system shuts down immediately

Ranked causes

1. Non-volatile memory corruption (occasional)
2. ABS table corruption or invalid data write/read (occasional)
3. Software corruption or bug (occasional)

3 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Drag wires damaged or improperly positioned patient safety

Static drag wires not securely attached, not touching floor, or dirty

Ranked causes

1. Drag wire loose attachment or wear (occasional)
2. Drag wire not contacting floor (occasional)
3. Drag wire contamination (occasional)

First check

Visually inspect drag wire attachment points

Test point: Drag wire fasteners (Mobile C-Arm and WorkStation)
Expected: Wires are securely attached

2 more checks with pass and fail actions, 3 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Excessive temperature at tank caution

High Voltage Tank or IGBT heat sink reaches abnormally high temperature during operation

Ranked causes

1. Oil expansion beyond set limits (occasional)
2. IGBT failure (occasional)
3. Cooling fan failure or disconnection (occasional)

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

External network (DICOM) not active

DICOM external network communication not functioning; boot message shows network link down

Ranked causes

1. Local network not operational (common)
2. External network cable not connected to motherboard (occasional)
3. Back-panel Ethernet cable or connector defective (occasional)

First check

Verify Local Network is operational

Test point: Local network components
Expected: Local network functioning correctly

2 more checks with pass and fail actions, 3 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Filament drive pulses absent high voltage

One or both filament drive signals not present; Filament Driver PCB produces no output

Ranked causes

1. Optoisolators faulty, broken connections, or no FIL_DRV_RTN connection (common)
2. Fault in 7407 or 74LS14 components (occasional)
3. Fault in FIL_CUR sensor (occasional)

First check

Verify filament drive pulses present at Generator Driver PCB

Test point: Generator Driver PCB filament drive output
Expected: Pulses present on both filament drive lines

2 more checks with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Filament drive pulses absent or incorrect high voltage

No filament current or voltage; filament driver produces no drive; X-ray tube cannot generate X-rays

Ranked causes

1. Optoisolators faulty or broken connections to Filament Driver PCB (common)
2. Missing FIL_DRV_RTN connection or 7407 fault (occasional)
3. Faulty 74LS14 or FIL_CUR sensor (occasional)

First check

Verify filament drive pulse presence at Generator Driver PCB

Test point: FILDRA and FILDRB outputs on Generator Driver PCB
Expected: Drive pulses present on both lines during X-ray request
Tools: Oscilloscope

4 more checks with pass and fail actions, 3 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Filament supply voltage wrong high voltage

Filament B+ supply voltage is not at the correct level for the selected filament, preventing proper filament heating

Ranked causes

1. Bad filament supply regulator on Filament Driver PCB (common)
2. Filament voltage sense divider or sensor fault (occasional)
3. High filament supply voltage due to output stage fault (rare)

First check

Measure FIL_B_PLUS voltage at Filament Driver PCB output

Test point: FIL_B_PLUS
Expected: About 160V or 140V per filament selection, ±10V
Tools: DMM

2 more checks with pass and fail actions, 4 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Filament voltage error (wrong voltage applied) high voltage

Filament voltage at FIL_VOLT does not match FIL_VOLT_REF, resulting in incorrect mA generation

Ranked causes

1. Filament B plus wrong or duty ratio of filament drive pulses wrong (common)
2. Failure of filament regulation or sensor gain wrong (occasional)
3. Wrong filament relay selection or relay problem on Filament Driver PCB (occasional)

First check

Measure filament voltage at FIL_VOLT relative to FIL_VOLT_REF

Test point: FIL_VOLT
Expected: Within specified range for selected filament and technique

1 more check with pass and fail actions, 3 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Front caster does not pivot freely on vertical axis caution

Front caster wheel cannot rotate or turn smoothly around its vertical mounting point

Ranked causes

1. Damaged axle parts (occasional)
2. Axle parts are contaminated by debris (common)
3. Axle parts require lubrication (common)

3 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Interconnect cable or connectors damaged high voltage

Interconnect cable, Mobile C-Arm connector, or pins damaged or strain relief not secure

Ranked causes

1. Interconnect cable mechanical damage (occasional)
2. Connector or pins damaged (occasional)
3. LEMO connector strain relief loose (occasional)

First check

Visually inspect interconnect cable for damage

Test point: Interconnect cable entire length
Expected: No cuts, pinches, or damaged insulation

2 more checks with pass and fail actions, 3 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Joystick failure

System cannot communicate with joystick or Remote User Interface; joystick control inoperative.

Ranked causes

1. Joystick mechanically obstructed or at incorrect position (common)
2. RUI not properly connected or Motion PCB fault (common)
3. Joystick assembly or RUI hardware failure (occasional)

First check

Clear joystick area and verify home position

Test point: Joystick physical area and center position
Expected: No obstruction; joystick centered; enable line inactive

2 more checks with pass and fail actions, 3 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Joystick stuck

Joystick reported error during initialization; joystick control may be inoperative.

Ranked causes

1. Joystick physically obstructed or stuck (common)
2. Joystick not at home position or enable line active (occasional)
3. Joystick assembly or RUI failure (occasional)

First check

Check for joystick obstruction

Test point: Joystick physical area
Expected: No objects, cables, or hands in contact with joystick

2 more checks with pass and fail actions, 3 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Lift column inoperative caution

Vertical lift column does not respond

Ranked causes

1. Loose connectors (common)
2. No MOTOR-115-AC to PS3 caused by defective K15 or K16 relay (occasional)
3. Lift column control problem (occasional)

3 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Lift column inoperative

C-Arm lift column does not respond to control inputs or fails to raise/lower

Ranked causes

1. Loose connectors on Power/Motor Relay PCB or PS3 inputs (common)
2. No MOTOR-115-AC to PS3 caused by defective K15 or K16 relay (rare)
3. Lift column control problem (unknown)

First check

Inspect connectors on Power/Motor Relay PCB

Test point: Power/Motor Relay PCB connectors
Expected: All connectors fully seated with no corrosion or bent pins

2 more checks with pass and fail actions, 3 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Lift motor movement test failed

MCU detects failure in lift motor up/down motion during test

Ranked causes

1. Faulty power motor relay PCB (unknown)
2. Faulty lift power supply (unknown)
3. Faulty lift column assembly (unknown)

3 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Lift switch held on for 30 seconds or more caution

Lift switch remains in ON condition for extended period; all generator functions inhibited

Ranked causes

1. Object pressing on lift switch (common)
2. Faulty lift switch (occasional)
3. Faulty lift circuit (occasional)

First check

Inspect lift switch for obstruction

Test point: C-Arm lift switch
Expected: No objects pressing on switch

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

mA sensor failure detected high voltage

Message alternates with technique display; system detects failure in one of mA sensors during operation

Ranked causes

1. mA sensor malfunction (common)
2. HV tank sense point fault (occasional)
3. HV Supply Regulator PCB failure (occasional)

First check

Measure HV tank sense point voltages

Test point: HV tank sense points
Expected: Nominal operating range

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

MCU contact sense test failed patient safety

MCU diagnostics indicate bumper contact detection is not functioning; system cannot sense bumper position.

Ranked causes

1. Bumper assembly not properly attached or faulty (common)
2. Bumper assembly connector fault (common)
3. Bumper assembly wiring or MCU fault (occasional)

First check

Verify bumper assembly attachment to Image Intensifier

Test point: Bumper mechanical mounting and connectors
Expected: Bumper physically attached; all connectors fully seated

2 more checks with pass and fail actions, 3 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

MCU joystick motion enable test failed

MCU diagnostics indicate joystick motion enable signal is not responding correctly or stuck.

Ranked causes

1. Joystick physically grasped or obstructed (common)
2. Joystick assembly failure (occasional)
3. Joystick wiring or MCU failure (occasional)

First check

Release joystick and center position

Test point: Joystick mechanical position
Expected: Joystick at center (0,0) position; enable line signal responding

2 more checks with pass and fail actions, 3 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

MCU RUI sense test failed

MCU diagnostics indicate Remote User Interface is not detected during bootup; RUI communication unavailable.

Ranked causes

1. RUI disconnected or improperly connected (common)
2. RUI connector or wiring fault (common)
3. RUI hardware failure (occasional)

First check

Disconnect and reconnect RUI connector

Test point: RUI connector physical interface
Expected: Connector fully seated with audible click; no loose contact

2 more checks with pass and fail actions, 3 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

More symptoms

Motion disabled
Motion error
Motion failure
Motion Status Register 1 error: Collision fault
Motion Status Register 1 error: Collision Ready failed
Motion Status Register 1 error: Lift Down request failed
Motion Status Register 1 error: Lift Up request failed
Motion Status Register 1 error: Orbital fault
Motion Status Register 1 error: Rotational fault
Motion Status Register 2 error: Clutch sense failed
Motion Status Register 2 error: Key switch failed
Motion Status Register 2 error: RUI sense failed
Navigation Computer not responding
No +5 Volt power to Servo
No exposure from Handswitch or Footswitch
No filament current (filament voltage present)
No filament voltage observed
No response to touch controls after Visualization screen appears
Orbital potentiometer status error
Orbital servo overrun error
Overload fault in high voltage regulator
Overvoltage fault in X-ray generator
Pre-charge voltage fails to reach battery voltage
Rear caster does not roll freely on the floor
Rear caster does not steer freely
Rotation servo overrun error
Rotational potentiometer status error
RS422 serial communication failure
System bootup fails at 13 Arrows stage
System bootup fails at 14 Arrows stage
System bootup fails at 18 Arrows stage
System fatal error or memory failure
Workstation boots but nothing on C-arm with battery charger light ON
Wrong filament voltage observed
Wrong mA during shot
X-ray control switch stuck during startup
X-ray switch security mismatch error
X-ray tube overheats
X-ray tube overheats; thermal sensor high or thermal cutout activated
A-Arm excessive movement
A-Arm movement
A-Arm moves unintentionally
AC power cord damaged
Actual kVp higher than displayed value
Actual kVp lower than displayed value
Actual mA higher than displayed value
Actual mA lower than displayed value
Arcing observed
Balance wheel does not turn
Balance wheel is loose or wobbles
Battery voltage below 160 volts
Battery voltage drops below 163VDC during operation
Black image – Technique servos to maximum
Brakes on one or both rear wheels do not engage
Bumper attached
Bumper removed
Calibration: A-Arm removal and installation
Calibration: Camera Decentration Verification
Calibration: Collimator Mechanical Centering
Calibration: Image Tube Sizing Verification
Calibration: mechanical pivot function and resistance
CCD camera cooling connections defective
Charger indicator light not illuminated
Clutch is open
Clutch position sensor signal failed
Collision detected
Collision with motorized vertical column during operation
Contact detector fails to detect contact
Contact detector incorrectly reports a contact
Cooling fans not operating
Display monitor excessive movement
Display monitor movement
Display monitor moves unintentionally
Excessive temperature rise at High Voltage Tank
External Interface PCB troubleshooting
Fast stop activated
Filament current error
Flip flop brake does not prevent movement
FluoroTrak display power supply no output
Generator battery voltage below 160 Volts
Ground continuity failure
Hand switch indicator lights off
Hand Switch indicator lights off
Hard disk drive LED not illuminated
Image Processor PCB or power strip output voltage out of range
Image tube input dose out of specification
Interlock system down
Interlock system down
Isolation transformer secondary output voltage out of specification
Key disable signal sensing failed
Light or dark image with working ABS – Technique adjusts and stabilizes
Light output out of specification
Low contrast images
MCU diagnostic switch failed
MCU joystick X position too high
MCU joystick X position too low
MCU joystick Y position too high
Monitor support arm excessive movement
Monitor Support arm movement
Monitor support arm moves unintentionally
Motion stop switch failed
Motion Stop will not clear
Motorized C-Arm rotation not responding or misaligned
Motorized orbital motion not responding or misaligned
Navigation Computer boot fails with 'Can't Open Boot Device' message
No +15 Volt power to Remote User Interface
No bootup
No bootup
No fans operate
No image and kV tracks to 120
No video but pilot tone OK
No video output
One front caster does not contact the floor
Power supply voltages out of specification
Pre-charge failure indicated by system
Pre-charge voltage exceeds 250V maximum
Printed image quality degraded or media jammed
PS1 output incorrect
RUI failure
RUI key stuck
Saturation fault in high voltage regulator circuit
Stator does not start during boot-up
Stator stops running
Steering test failure
System bootup fails at 15 Arrows stage
System bootup fails at 16 Arrows stage
System bootup fails at 19 Arrows stage
System bootup fails at Five Arrows stage
System does not complete pre-charging; PRECHARGE TIMEOUT ERROR displayed
System does not complete pre-charging; PRECHARGE VOLTAGE ERROR displayed
Various errors from IGBT peak voltage exceedance
Vertical motion commanded from RUI fails or runs intermittently
VFDs inoperative
VFDs inoperative
Video present but no pilot tone
White image – Technique servos to minimum
Workstation boots but nothing on C-arm with battery charger light OFF
Workstation boots but nothing on C-arm. Battery Charger Light OFF
WorkStation wheels do not roll smoothly
Wrong filament current observed (when voltage correct)
Wrong filament selection
X-ray disable keyswitch in standby position
+14VDC or -14VDC section of PS2 failed
24-hour recharge required
4-hour warm-up required
A/D channel failure during startup
Analog-to-digital channel failure
Anode overheated warning
Anode warm warning
Anode/housing hot - HLF disabled
Anode/housing warm warning
Arcing detected in High Voltage Tank
Arcing in High Voltage Tank
Arcing in X-ray tube
Auxiliary DAP control using DOS keyboard X-key toggle
Balance wheel tread is worn or damaged
Battery capacity below 40%
Battery charge low warning
Battery charge state warning
Battery charge very low warning
Battery charging disabled by X-Ray Controller
BIOS not displayed during boot-up
Brakes do not release
Buzzer sounds when Workstation switched on
C-Arm angle calibration verification
C-Arm collision detection during motorized movement
C-arm does not rotate freely when Flip Flop brake is released
C-arm does not rotate freely with brake released
C-Arm does not turn when steering handle turned with brake in neutral
C-Arm Orbital brake ineffective
C-arm PCB battery replacement
C-Arm PS1 output voltage out of specification
Cable pusher blades damaged
Calibration: A-Arm lower end adjustment
Calibration: Battery charger output voltage
Calibration: Battery charger output voltage adjustment
Calibration: Battery Charging System
Calibration: Beam alignment tool to image tube centering
Calibration: Beam Alignment Tool to Image Tube Centering
Calibration: Beam alignment verification
Calibration: Brake adjustment for ineffective braking
Calibration: Camera decentration
Calibration: Collimator Mechanical Centering
Calibration: Collimator rotation and dose rate
Calibration: DAP rotation constants (1-leaf collimator)
Calibration: Dead time between kV drive signals
Calibration: Differentiator setup
Calibration: display monitor stowed position and retention
Calibration: Dose Area Product using UtilitySuite
Calibration: Filament/duty cycle calibration
Calibration: Flat panel display (touch screen)
Calibration: Fluorographic Pulsed mA Accuracy
Calibration: Fluoroscopic kVp Accuracy at Maximum mA
Calibration: Generator, Beam and Camera alignment
Calibration: Horizontal Cross Arm motion and locking
Calibration: Image Tube Electronic Centering Verification
Calibration: Image tube sizing verification
Calibration: Iris Stop
Calibration: kVp accuracy
Calibration: Lens Focus
Calibration: Light Sensor
Calibration: Light Source Fostec
Calibration: mA accuracy verification
Calibration: mA null adjustment
Calibration: MAG2 field verification
Calibration: monitor pivot mount adjustment
Calibration: motorized C-arm angular positioning accuracy verification
Calibration: motorized C-arm orbital and rotational positioning
Calibration: Motorized movement system
Calibration: motorized orbital motion
Calibration: motorized rotational motion
Calibration: Orbital clutch operation
Calibration: Power Supply PS1
Calibration: PWM chip sync adjustment
Calibration: Ramp peak voltage adjustment
Calibration: Rotation Pin adjustment
Calibration: Secondary Arm removal and installation
Calibration: Stability pot overshoot adjustment
Calibration: Tracking system
Camera decentration offset detected
Charger failed
Charger output voltage out of specification
Cine Enclosure power supply voltages out of specification
Clutch fails to engage
Clutch fails to release
Clutch Sense signal not responding to open clutch
Collimator calibration required
Collimator hesitates or stops during movement
Collimator hunts for position
Collimator iris not fully closing
Collimator iris position potentiometer error
Collimator iris potentiometer error
Collimator iris too large
Collimator iris unstable
Collimator iris visibility in fluoro mode - assessment for misalignment
Collimator leaf dose accuracy verification
Collimator stuck
Collision bumper contact sensing
Collision detector fails to detect collision
Collision Ready signal incorrect or bumper not detected
Communication failed
Configuration for single-leaf and dual-leaf collimator systems
Contact detected
CONTACT relay failed during startup
Contact signal not responding to collision
Control panel communication error
Control panel error
Control panel key stuck at bootup
Control panel key stuck at operation
Cross Arm cannot be moved
Cross Arm does not lock in place
Cross Arm does not remain locked
Data error in memory
Dead time adjustment for HV generation
DICOM interface unable to archive or print images
Display does not respond to touch input
Drag wire damaged or improperly mounted
Electrical hazard from liquid ingress during cleaning
Equipment requires safety inspection before operation
Error message displayed during boot-up
External network inactive; boot message shows Link down
Filament calibration required
Filament driver fault indicated
Filament regulator failed
Filament regulator failure
Filament select error
Film exposure continues beyond required time
Flat Panel Display assembly or arm positioning difficulties
Flat Panel Display assembly positioning difficulties
Flat Panel Display does not shut off immediately
Flip Flop brake ineffective
Flip Flop rotation restricted or rough
Fluoro exposure technique fluctuates or exhibits abnormalities
Fluoroscopic kVp Accuracy at 1 mA
Fluoroscopic kVp Accuracy at Maximum mA
FluoroTrak 9800 Plus navigation subsystem malfunction
FluoroTrak Unit power not connected
Footswitch security error
Generator driver fault indicated
High Voltage and Control Cable Assembly replacement required
High Voltage Supply Regulator PCB replacement
HLF overtime exceeded
Horizontal Cross Arm cannot be moved from locked position
Horizontal Cross Arm does not lock in position
Horizontal Cross-Arm brake ineffective
Horizontal Cross-Arm does not slide smoothly
Housing is hot warning
Housing overheated
Housing overheated - X-ray disabled
Housing warm or hot
Housing warm warning
HV cable arcing suspected
HV generator error
HV generator on unexpectedly
HV register failure at startup
HV register read failure
Image tube focus adjustment
Incorrect ARCNet node count display
Interlock failure
Interlock stage not progressing
Joystick X-axis raw counts out of range
Joystick Y-axis position incorrect
Joystick Y-axis raw counts out of range
Key stuck on panel
Key Switch signal incorrect or not changing
Keyboard keys unreliable or unresponsive
kV on in error
kV out of range (high)
kV out of range (low)
KVP drive timing problem indicated
L-Arm brake ineffective
Large filament non-functional
Lift Down key signal not registering
Lift switch stuck
Lift Up key signal not registering
Line voltage regulation outside acceptable range
Low mA messages
Low mA messages displayed
Low mA output
mA on in error
mA out of range (high)
mA out of range (low)
mA sense active with no X-ray switch pressed
mA sensor failure
MCU NVRAM test failed
MCU watchdog timer not incrementing
Microcontroller not running
Mobile C-Arm wheel brake ineffective
Motion calibration required
Motion enable signal not responding to joystick grasp
Motion Stop button not engaging or disengaging
Motion Stop fails to stop
Motorized rotation does not display correct angle on workstation monitor
Motorized rotation does not display correct direction on workstation monitor
Navigation Computer fans do not shut down properly
Navigation Computer fans not running
Navigation Computer power supply voltage missing
Neither vertical lift column button works
No image and kV tracks to 120
No image on Flat Panel Display
No image on Flat Panel Display, screen dark or distorted
No response to touch controls
No video, no pilot tone
Non-compliant external device connected to system
One lift button works, but the other does not
One lift button works, other does not
One or two fans do not operate
Orbital auxiliary status not responding
Orbital clutch does not engage
Orbital Clutch does not engage or disengage
Orbital Fault signal not responding to collision
Orbital motion does not display correct angle on workstation monitor
Orbital motion does not display correct direction of movement on monitor
Orbital rotation restricted or rough
Orbital servo controller status not responding
Overcurrent shutdown triggered
Overload fault detected
Overvoltage condition indicated
Overvoltage fault detected
Overvoltage messages
Overvoltage messages displayed
Overvoltage shutdown triggered
Precharge capacitor voltage exceeds 250 Volts
Precharge circuit timeout
PRECHARGE VOLTAGE ERROR message
PRECHARGE VOLTAGE ERROR message displayed
Printer does not power on after installation
Private Network is down
PS1 output voltage incorrect or dropped
PS2 output voltage incorrect
PS2 test point verification
PS3 output voltage incorrect
Radial rotation restricted or rough
Ramp adjustment for pulse shaping
Room door open
Rotational auxiliary status not changing
Rotational Fault signal not responding to collision
Rotational servo controller status not changing
RUI key does not register unique code on press
RUI key release code does not register consistently
RUI Sense signal not detecting RUI connection
RUI software revision not displaying
Safety interlock bypassed or disabled
Saturation fault detected
Small filament non-functional
Software fails to boot after pre-charge voltage cycling
Stability adjustment for HV supply
Stator not energized
Stator runs at 115V, tube overheats
Stator runs normally but error messages seen
Status LEDs not illuminated on power distribution boards
Steering handle does not align with rear wheels
Steering handle misaligned with rear wheels
Stuck control panel key
Sync adjustment for PWM oscillator
System boots with errors after reboot
System bootup fails at 11 Arrows stage
System bootup fails at 12 Arrows stage
System bootup fails at 17 Arrows stage
System bootup fails at Eight Arrows stage
System bootup fails at Nine Arrows stage
System bootup fails at Seven Arrows stage
System bootup fails at Six Arrows stage
System bootup fails at Ten Arrows stage
System does not boot – stops at 14th arrow
System does not boot – stops at 18th arrow on Control Panel
System does not boot at 14th arrow on Control Panel
System does not boot at 18th arrow on Control Panel
System does not boot completely
System does not complete boot sequence
System does not complete pre-charging but relays click every few seconds
System incorrectly reports a collision
System performs motorized orbital motion with clutch released
System shuts down with no error messages
System shuts down with no error messages
Temperature sensor failure
Touch screen cursor does not align with touch point
Touch screen does not respond to finger input
Uninterruptible Power Supply (UPS) malfunction
UPS battery voltage low
UPS battery voltage low during discharge
Various errors - Snubber components damaged or defective
Verification: DAP constant calculation and system validation
Vertical column operation not disabled when Fast Stop switch pressed
Vertical Lift Column lift buttons non-functional
Visualization screen did not appear during initialization
Warm-up required
Water or conductive fluid ingress causes short circuit or electric shock
Water or conductive fluid ingress hazard
Wheels do not move 90° when steering handle turned
Wig-Wag brake ineffective
Wig-Wag movement restricted
Workstation casters do not lock when wheel pedal fully up
Workstation displays Navigation error message
WorkStation wheel brake ineffective
Workstation wheels and casters do not turn freely in center pedal position
Worn or damaged front caster tread
Worn or damaged rear caster tread
Wrong filament selection
X-ray control released before film properly exposed
X-ray generation not disabled when Fast Stop switch released
X-ray housing temperature sensor failure
X-ray room door open
X-ray switch security failure
X-ray switch stuck
X-ray tube anode not powered
X-ray tube current on without X-ray switch pressed
X-ray tube fan not working
X-ray tube overtime
X-ray tube temperature sensor failure at startup
X-rays disabled

451 more symptoms with ranked causes and checks are in ServiceForge. Connect ServiceForge to your AI

Error codes

Code	Meaning	Trigger	Severity
`0D`	System halted - out of memory	Memory allocation failure or exhausted memory pool during board initialization or operation	critical
`0x2251`	MCU Err Stat1 Lift Down Request Failed	Lift Down key pressed and held on RUI; MCU detects no response	error
`0x2252`	MCU Err Stat1 Lift Up Request Failed	Lift Up key pressed and held on RUI; MCU detects no response	error
`0x2255`	MCU Err Stat1 Collision Ready Failed	Bumper switch assembly unplugged or disconnected; collision detection unavailable	error
`0x2256`	MCU Err Stat1 Rotational Fault Failed	Actual collision detected during C-arm rotational movement	error
`0x2257`	MCU Err Stat 1 Orbital Fault Failed	Actual collision detected during C-arm orbital movement	error
`0x2258`	MCU Err Stat 1 Collision Failed	Bumper pressed and held during diagnostic; collision signal stuck active	error
`0x225D`	MCU Err Stat2 Clutch Sense Failed	Clutch held open during diagnostic; sense circuit cannot detect clutch state	error
`0x225E`	MCU Err Stat2 Key Switch Failed	C-Arm key switch turned to Standby position or not responding	error
`0x2260`	MCU Err Stat2 RUI Sense Failed	RUI unplugged or disconnected from system; MCU cannot detect RUI	error
`0x2261`	MCU Err JS Motion Enable Test Failed	Joystick grasped or held during bootup; motion enable signal not responding	error
`0x2263`	MCU Err Contact Sense Failed	Contact bumper pressed and held during bootup; system does not recognize bumper	error
`0x226A`	MCU Err RUI Sense Test Failed	RUI disconnected or unplugged from system during bootup	error
`0x226B`	MCU Err JS X Pos Too High	Joystick X axis rest position incorrect; joystick off-center at bootup	warning
`0x226C`	MCU Err JS X Pos Too Low	Joystick X axis rest position too low; off-center from true neutral	warning
`0x226D`	MCU Err JS Y Pos Too High	Joystick Y axis rest position incorrect; joystick off-center at bootup	warning
`0x226E`	MCU Err JS Y Pos Too Low	Joystick Y-axis rest position reading below expected threshold	warning
`0x226F`	MCU Err LGS Checksum Error	Checksum validation fails for orbital or rotational servo control module	error
`0x2270`	MCU Err LGS Position Error	Servo position error detected during orbital or rotational movement	error
`0x2271`	MCU Err LGS Servo Overrun	Orbital or rotational servo command overrun condition detected	error
`0x2272`	MCU Err Motion MS Sw Failed	Motion stop switch signal not detected or incorrect state on RUI	warning
`0x2273`	MCU Err NVRAM Test Failed	Binary configuration file CRC test fails during bootup	critical
`0x2274`	MCU Err Diag Switch Failed	Diagnostic switches S2 and S3 not set to 0,0 during boot or MCU hardware failure	warning
`0x2275`	MCU Err Frame Sync Test Failed	TIM SystemTime.Fsync signal not incrementing within 60 ms	error
`0x2277`	MCU Err Clutch Sense Failed	Clutch position sensor signal not detected or incorrect state	warning
`0x2280`	MCU Err Lift Motor Movement Test Failed	Lift up/down motor motion not detected during MCU self-test	warning
`Anode overtemp (implied from ANODE IS HOT message)`	X-ray tube anode heat capacity critical	Anode heat level reaches or exceeds 80% of rated capacity	critical
`Battery low (BATTERY CHARGE message)`	C-Arm battery charge below safe operating level	Battery voltage/charge below 40% of required capacity	warning
`Collimator fault (COLL IRIS POTENTIOMETER ERROR)`	Collimator iris position feedback failure	COLL_IRIS_POSN line on Fluoro Functions PCB disconnected or not transitioning	error
`Communication timeout (COMMUNICATION FAILED message)`	Workstation-to-C-Arm communication interrupted >1 second	No valid communication received for >1 second; Watchdog timer expires	error
`E0`	ARCNET transmit pipe temporarily full	Network transmission buffer overflow; excessive ARCNET traffic or transmission queue backlog	warning
`E-14 or equivalent A/D Channel failure code`	Analog-to-digital converter channel failed	A/D channel malfunction detected during bootup self-test	critical
`E4`	Stack memory dangerously low	Available stack memory falls below critical threshold during operation	error
`Fan failure`	One or more cooling fans not operating	Fan motor not running, no airflow detected	warning
`FAST STOP ACTIVATED`	Fast Stop switch has been activated; X-ray generation disabled and vertical column operation suspended	Fast Stop switch pressed and held	warning
`FE`	Fatal error - system halted	Stack overflow, no memory available, or unhandled interrupt detected during operation or initialization	critical
`FF`	System halted - out of memory or fatal error	Memory exhaustion or Fatal Error condition	critical
`Filament regulation fault (FILAMENT REGULATOR FAILURE)`	X-ray tube filament current out of tolerance	Filament current measurement outside acceptable range during operation	error
`Footswitch security fault (FOOTSWITCH SECURITY ERROR)`	X-ray control security verification failed	X-ray security line state does not match X-ray control state	critical
`Housing overtemp (implied from HOUSING OVERHEATED message)`	X-ray tube housing heat capacity exceeded maximum limit	Housing heat level reaches 100% or greater of rated capacity; thermal cutoff switch activates	critical
`HV generator fault (HV GENERATOR ERROR)`	High voltage generator register error	HV generator register contents invalid or corrupted	critical
`KEY SWITCH IN STANDBY - X-RAYS AND LIFT DISABLED`	X-ray disable keyswitch on generator is in vertical (ON) position	X-ray disable keyswitch activated	warning
`KV ON IN ERROR`	X-ray tube current on but no X-ray switch pressed	System detects X-ray tube current without switch activation	critical
`LIFT SWITCH STUCK - PRESS ANY KEY`	Lift switch held in ON condition for 30 seconds or more	Lift switch remains ON for extended period	warning
`LOADING LOW DOSE ABS`	Low Dose ABS table selected as current ABS table	User selects Low Dose ABS table on generator	info
`LOADING STANDARD ABS`	Standard ABS table selected as current ABS table	User selects Standard ABS table on generator	info
`MA ON IN ERROR`	mA Sense on but no X-ray switch activated	System detects mA sense active without X-ray switch	critical
`MA SENSOR FAIL`	System detects failure in one of the mA sensors	mA sensor functional test fails during operation	error
`Navigation Computer not responding`	Navigation Computer unresponsive	Power or boot issue on Navigation Computer	warning
`No video, but pilot tone OK`	Video signal missing while pilot tone (LIVE message) is present	Blown fuses F15 or F16 or loose connector P7	error
`No video, no pilot tone`	Both video signal and pilot tone are missing	Blown fuses F13 or F14 or loose connector P7	error
`OVERLOAD FAULT`	Possible fault in high voltage regulator circuit	Excessive current or overload condition detected	error
`OVERVOLTAGE FAULT`	Possible X-ray generator failure indicated by overvoltage condition	Overvoltage detected in X-ray system	error
`PLEASE WAIT`	System performing internal processing; X-rays disabled during this period	System internal processing active	info
`PRECHARGE CIRCUIT TIMEOUT`	CONTACT relay failed to close during startup process	CONTACT relay does not close within timeout period during precharge initialization	critical
`PRECHARGE RELAY CLICK`	System does not complete pre-charging but relays click every few seconds	Software failure with overvoltage protection activated during pre-charge	warning
`PRECHARGE TIMEOUT ERROR`	Pre-charging did not complete within expected time duration	Pre-charging process exceeds maximum allowed duration	error
`PRECHARGE VOLTAGE ERROR`	Voltage target not reached during pre-charging phase	Pre-charging cannot establish required voltage level	error
`PRECHARGE VOLTAGE ERROR`	Precharge capacitor voltage exceeds 250 Volts during bootup	Precharge voltage check during system startup	critical
`PRECHARGE VOLTAGE ERROR`	Battery charger output voltage is too high during normal charging operation	Battery charger output voltage exceeds specification when charging battery in normal mode	error
`pre-OPIS`	System is pre-OPIS software version	Connection error when launching Utility Suite DAP Calibration	warning
`RELEASED EARLY`	X-ray control released before film properly exposed in Film mode	X-ray control released prematurely during film exposure	warning
`ROOM DOOR OPEN – CLOSE DOOR`	Door of X-ray room is open	X-ray room door not fully closed and latched	warning
`RUNNING CALIBRATION`	Remote Utilities Tool (RUT) software calibrating generator filament	RUT software filament calibration procedure initiated	info
`SATURATION FAULT`	Fault in high voltage regulator circuit; system will not operate	Saturation condition detected in HV regulator	critical
`STATOR NOT ON`	X-ray tube anode not powered; stator not receiving voltage	System determines X-ray tube anode is not powered	critical
`STATOR STANDBY WAIT`	System detects batteries below 40% capacity; charging required	Battery capacity drops below 40% during operation or standby	warning
`SUNW hme0 - Link down, Cable problems?`	SUNW hme0 network link down	DCOM network connectivity issue	warning
`WARNING, HIGH KV - PRESS ANY KEY`	Actual X-ray output kVp is higher than displayed value and not within tolerance	kVp sense circuit detects output exceeds displayed value	warning
`WARNING, HIGH MA - PRESS ANY KEY`	Actual X-ray output mA is higher than displayed value and not within tolerance	mA sense circuit detects output exceeds displayed value	warning
`WARNING, LOW KV - PRESS ANY KEY`	Actual X-ray output kVp is lower than displayed value and not within tolerance; poor image quality may result	kVp sense circuit detects output below displayed value	warning
`WARNING LOW MA - PRESS ANY KEY`	Actual X-ray output mA is lower than displayed value and not within tolerance; poor image quality may result	mA sense circuit detects output below displayed value	warning
`WARNING: Tracking Inactive`	Tracking system is not operational; system can only be used for surgical planning	System boots to Visualization screen with tracking inactive condition	warning
`WARNING: Tracking Inactive`	FluoroTrak tracking function is not operational	System boots to Visualization screen and displays warning message	error
`X-RAY OVERTIME - PRESS ANY KEY`	Film shot continues beyond required exposure time; software terminates exposure	Exposure duration exceeds programmed time limit during film shot	warning
`X-RAYS DISABLED`	X-ray system disabled for safety or operational reason	Multiple possible triggers: keyswitch, room door open, safety interlocks	warning
`X-RAY SWITCH SECURITY ERROR`	Mismatch between Security line on footswitch/handswitch and matching connector	Security line wiring mismatch detected during system startup or operation	error
`X-RAY SWITCH STUCK`	X-ray control in ON state detected during system startup; applies to Left or Right controls	X-ray control switch sensed in ON position during boot sequence	critical
`X-RAY TUBE TEMPERATURE SENSOR FAILURE - PRESS ANY KEY`	X-ray tube temperature sensing thermistor fails functional testing at start-up	Temperature sensor functional test fails during system bootup	error
`ZNB (0): 100 Mbps Full-Duplex`	Network initialization message	Boot process initialization	info

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ServiceForge knowledge base record. Field-unverified unless technicians confirmed it. A teaching summary of the record, not a service manual. Export 2026-10-14.