Portable X-ray systems · AMX family

GE Healthcare AMX-4: troubleshooting and error codes

The ServiceForge knowledge base holds 278 documented symptoms for the GE Healthcare AMX-4, with 586 ranked causes, 624 diagnostic checks with test points and expected values, and 136 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

Code 437 displayed after exposure high voltage

Code 437 occurs after X-ray exposure attempt, may indicate various electrical or mechanical issues

Ranked causes

1. Jumper connection problem at TP-14 & 15 (occasional)
2. HV Transformer spark gap degradation (occasional)
3. X-ray tube spitting or arcing (occasional)
4. Q-3 Power Pack connection issues (occasional)
5. Battery or tap relay connection failure (occasional)
6. Poor pin spread on high voltage cables (rare)
7. Defective drive handle enable switch (occasional)
8. Snubber problem across drive relays (occasional)
9. Static discharge or ESD event (rare)
10. Defective charger board (rare)

First check

Measure ohmic value from drive wheels to ground

Expected: 8 to 10K K ohms, not >25K
Tools: Ohmmeter

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X−RAY WORD LIMIT error radiation

One or more x-ray calibration parameters out of limits after adjustment

Ranked causes

1. Incorrect mA value entered during mAs calibration (common)
2. CPU to Filament/kVp Board connection fault (occasional)
3. CPU Board TP-2 frequency out of spec (occasional)
4. mA meter not working properly (occasional)
5. Incorrect kVp values entered during kVp calibration (occasional)
6. Bleeder not properly calibrated (occasional)
7. Tap relays not functioning (occasional)
8. X-ray tube turn-off delay exceeds 2.0 ms (occasional)

First check

Verify correct mA value entered during mAs calibration

Test point: Calibration input
Expected: Correct mA value as specified

4 more checks with pass and fail actions, 8 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Error code 43A - Rotor not running radiation

Rotor fails to start or run during prep phase; affects X-ray tube preparation

Ranked causes

1. Rotor interconnect cable failure or poor connection (common)
2. CPU board failure (occasional)
3. U35 pin 18 signal absent - CPU or rotor control circuit failure (occasional)
4. TP1/TP2 waveform deviation - Rotor controller circuit failure (occasional)
5. X-ray tube rotor cable or connection failure (occasional)
6. Rotor Controller board failure (occasional)
7. Prep switch or collimator field light circuit failure (occasional)

First check

Listen for rotor motor running

Test point: X-ray tube rotor
Expected: Audible rotor motor sound during operation

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Coefficient of linearity exceeds specification radiation

Direct linearity test fails; exposure-to-mAs ratio (mR/mAs) variation between consecutive tube current settings exceeds 0.10 times their sum (rejection limit 0.09)

Ranked causes

1. mA accuracy out of specification (common)
2. Timer accuracy out of specification (common)
3. Probe saturation (occasional)
4. Excessive cable capacitance due to long cables and low mA selection (occasional)
5. Line voltage regulation out of specification (occasional)
6. Test not completed within one-hour limit (rare)

First check

Position probe relative to X-ray tube focal spot

Test point: For overhead tubes, 100 cm from focal spot; for undertable tubes, 30 cm above table
Expected: Probe positioned correctly per tube orientation
Tools: Probe test stand, ruler or measuring tape

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Coefficient of variation too high radiation

Exposure reproducibility test fails; radiation exposure varies more than acceptable limit (C.V. > 0.05) across repeated measurements

Ranked causes

1. Poor kVp reproducibility (deadband) (common)
2. Improper rotor acceleration delay or spot-film transfer delay (common)
3. Improper filament boost or filament temperature variation (common)
4. Variations in sweep speed or angle (tomographic systems) (occasional)
5. Line voltage regulation out of specification (occasional)
6. Defective ion chamber (AEC mode) (occasional)

First check

Perform exposure reproducibility test with A.E.C. for overhead X-ray tubes

Test point: radiation meter
Expected: Coefficient of variation ≤ 0.05 (rejection limit 0.045) across 10 exposures
Tools: Radiation meter with integrate mode, probe test stand

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Collimator light field intensity low

Light output from collimator below acceptable minimum at test distance; operator or field service measurement indicates insufficient illumination

Ranked causes

1. Lamp, mirror, or Mylar window dirty or discolored (common)
2. Lamp voltage low (common)
3. Mirror installed backwards (occasional)
4. Supply cable too long (occasional)
5. Faulty collimator bulb (occasional)
6. Faulty lamp socket (rare)

First check

Verify line compensator on generator properly adjusted

Test point: Generator line compensator
Expected: Properly adjusted per generator manual

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

Error code 454 triggered radiation

X-ray system halts on error code 454; requires diagnostic procedure to isolate cause

Ranked causes

1. 1 kHz driver signal not reaching CPU (common)
2. CPU board failure (occasional)
3. Insufficient voltage at J4-16 (supply voltage low or absent) (occasional)
4. Capacitor C-12 discharge or open (occasional)
5. Unknown voltage source on interconnect (rare)
6. 1 kHz driver board failure (occasional)

First check

Measure 1 kHz driver signal at J1-12

Test point: J1-12 of 1 kHz Driver Bd
Expected: Signal High

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Unit dead - no response high voltage

X-ray system does not respond to commands or show any signs of operation

Ranked causes

1. RAM battery below 2 volts (common)
2. Auxiliary RAM test failure (occasional)
3. Calibration database checksum error (occasional)
4. Watchdog timer circuit failure (occasional)
5. Timer 0 & 2 failure (occasional)
6. Analog to digital converter failure (occasional)

First check

Collimator lock release

Expected: Locks should release audibly

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Unit does not power on caution

Unit dead, no response to power switch. Collimator lock switches do not release when pressed.

Ranked causes

1. Fuse F6 is blown (common)
2. Relay K-215 is not energized (common)
3. CB1 battery voltage not present at circuit breaker (common)
4. Battery switched voltage missing (occasional)
5. Main battery voltage absent (occasional)
6. Loose or broken battery terminal wire (occasional)

First check

Listen for collimator lock release

Test point: Collimator lock switches
Expected: Audible click or release sound when locks are pressed

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

X-ray exposure fails to initiate radiation

Error Code 469 - X-ray exposure does not start or stops prematurely during attempted exposure

Ranked causes

1. Safety Contactor K7 not energized or does not remain energized during exposure (common)
2. Problem in Rotor Control board (occasional)
3. Problem in Hand Switch (occasional)
4. Tap Relays obstructed or not energizing properly (occasional)
5. Loose connections around Q3 or between 1 kHz and Fil/kVp boards (occasional)
6. X-ray tube spitting or HV Transformer spark gap out of specification (rare)

First check

Verify Safety Contactor K7 energizes and remains energized during exposure

Test point: Contactor K7
Expected: Energized during exposure
Tools: Visual inspection, multimeter

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

X-ray exposure system not generating power radiation

Generator cannot produce X-ray exposure after prep command

Ranked causes

1. Start SCR circuit failure or Power Inverter Q1 and Q2 both defective (common)
2. Safety Contactor contacts dirty or not making good contact (occasional)
3. 1 KHz Driver Board waveform failure (occasional)
4. CPU Board waveform output failure (occasional)
5. Defective HV Transformer or other circuit boards (rare)
6. Anode output driver circuit failure (CR-117 or CR-118) (rare)

First check

Check if other error codes displayed on system

Test point: System display
Expected: No other errors if only code 439 present
Tools: Visual inspection

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Charger error 3: Charger calibration limit exceeded

Charger current calibration data exceeded upper or lower limit

Ranked causes

1. Charger calibration out of specification (common)
2. CPU-Charger Board connection failure (occasional)
3. CHARGE SCALE-SELECT signal stuck or not changing state (occasional)
4. DAC output voltage out of expected range (occasional)
5. Charger Board TP-6 frequency out of specification (occasional)

First check

Run charger calibration

Test point: Calibration software
Expected: Calibration completes without limit errors

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Charger word limit: Charger calibration word limit exceeded

Battery charger calibration data word exceeded upper or lower limit

Ranked causes

1. Charger calibration out of specification (common)
2. CPU-Charger Board connection failure (occasional)
3. CHARGE SCALE-SELECT signal stuck or not changing (occasional)
4. DAC output voltage out of range (occasional)
5. Charger Board TP-6 frequency out of specification (occasional)

First check

Run charger calibration

Test point: Charger calibration software
Expected: Completes without limit errors

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Circuit breaker trips during X-ray exposure high voltage

System breaker kicks off when attempting to make an exposure; may occur with or without error codes displayed.

Ranked causes

1. X-ray tube arcing or defective HV transformer (occasional)
2. Stuck tap relays or HV transformer/candlestick arcing (common)
3. Start/Stop SCR circuit defect (occasional)
4. Trip breaker signal or related circuit triggering breaker (common)
5. mA or kVp out of calibration limits (common)

First check

Visually inspect HV transformer candlesticks and tap relays

Test point: HV transformer and relay bank
Expected: No arcing, candlesticks greased, no stuck relays

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DRIVE BYTE LIMIT error

Drive port reading exceeded upper or lower calibration limit

Ranked causes

1. Drive handle transducer out of calibration (common)
2. Transducer voltage supply low (occasional)
3. Transducer output not responding to handle movement (occasional)
4. Transducer output out of voltage range (occasional)
5. TP 29 test point voltage out of spec (occasional)

First check

Verify drive handle transducers wiring integrity

Test point: Drive transducer connectors
Expected: Secure connection with no damage

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Error 467: X-ray exposure control failure high voltage

X-ray exposure not functioning properly; multiple possible causes in flowchart

Ranked causes

1. Checksum Bypass Mode enabled (occasional)
2. High voltage cables loose or damaged (common)
3. Battery cells unequal (occasional)
4. Pulse width incorrect (occasional)
5. Waveform peak voltage drops with exposure time (occasional)

First check

Inspect high voltage cable connections

Test point: HV cable connectors
Expected: Cables tight with proper pin contact and spread
Tools: Visual inspection

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Error code 439 kVp readback low high voltage

Exposure time greater than 2 msec with kVp lower than 75% of dialed value

Ranked causes

1. System calibration drift (common)
2. HV cable connection loose (common)
3. Tap relay contacts worn or stuck (occasional)
4. Cathode HV cable degraded (occasional)
5. Filament/kVp or 1 KHz board failure (occasional)

First check

Measure exposure time and compare to dialed value

Expected: >2 Msec

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Error code 45F displayed high voltage

System displays error code 45F indicating filament circuit fault during X-ray preparation

Ranked causes

1. Cathode cable disconnected or loose from X-ray tube (common)
2. Filament drive voltage incorrect at HV transformer (common)
3. Waveform at U-13 pin 15 incorrect on Fil/kVp board (occasional)
4. Filament boost pulse duration exceeds 450 m/sec (occasional)
5. X-ray tube or HV transformer failure (rare)

First check

Disconnect cathode cable and observe error code change

Test point: X-ray tube cathode connection
Expected: Error code changes to 45E

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Half-value layer (HVL) too high radiation

Dose ratio exceeds acceptable limits, indicating excessive beam filtration or high kVp setting, reducing radiographic contrast

Ranked causes

1. kVp incorrect (high) (common)
2. Meter error – probe saturation (occasional)
3. Excessive anode wear (occasional)
4. Excessive filter in beam (occasional)
5. Spectral filtration enabled in system software (rare)

First check

Verify kVp accuracy

Test point: X-ray system output
Expected: kVp within ±1% of set value
Tools: RMI 230 or equivalent 1 kVp accuracy meter

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HNDL CAL ERR 1 displayed

Drive handle calibration zero point value limit exceeded

Ranked causes

1. Handle transducer zero point out of calibration (common)
2. Handle transducer wiring issue (occasional)
3. Transducer supply voltage low (occasional)
4. Transducer output voltage out of mid-range (occasional)
5. Transducer not responding to handle movement (occasional)

First check

Verify handle transducer wiring

Test point: Transducer connectors
Expected: Secure, undamaged connections

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HNDL CAL ERR 2 displayed

Handle calibration forward gain calculated out of range

Ranked causes

1. Handle forward calibration gain parameter invalid (common)
2. Handle transducer wiring fault (occasional)
3. Transducer supply voltage out of spec (occasional)
4. Transducer not responding during calibration (occasional)
5. TP29 voltage out of spec during calibration (occasional)

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

HNDL CAL ERR 3 displayed

Handle calibration reverse gain calculated out of range

Ranked causes

1. Handle reverse calibration gain parameter invalid (common)
2. Handle transducer wiring fault (occasional)
3. Transducer supply voltage low (occasional)
4. Transducer not responding during calibration (occasional)
5. TP29 voltage out of spec during calibration (occasional)

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

Right drive wheel stalls or has no torque

Error Code 13 triggered. Right motor stall signal detected. Occasional or constant stalling. May occur on inclines.

Ranked causes

1. Elevator or incline causes occasional stall (common)
2. Right brake dragging (common)
3. Right motor electrical or mechanical failure (occasional)
4. Mechanical problems in right drive wheel (occasional)
5. Right drive motor failure (rare)

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

Tap error 3: kVp too low at 35V tap

35 kVp tap produced insufficient voltage during calibration

Ranked causes

1. Battery voltage too low (common)
2. Tap calibration procedure error (common)
3. mAs calibration out of specification (common)
4. kVp calibration error (common)
5. Tap relay wiring defective or miswired (occasional)

First check

Measure battery voltage

Test point: Battery terminals
Expected: >=112 volts V
Tools: Voltmeter

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

X-rays inhibited condition radiation

X-ray beam is inhibited and cannot fire; requires system re-calibration to restore operation

Ranked causes

1. Battery voltage below 112 VDC (common)
2. Backup timer expired on last exposure (common)
3. Unit not calibrated (common)
4. Line sense detected on power-up (occasional)
5. Prep or Expose switch detected on power-up (occasional)

First check

Verify X-rays inhibited status

Test point: System display
Expected: X-rays Inhibited shown

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X-rays inhibited on power-up radiation

Unit blocks X-ray generation during power-up; inhibition occurs when one or more trigger conditions are met

Ranked causes

1. Battery voltage below 112VDC (common)
2. Backup timer expired on last exposure (occasional)
3. Unit not calibrated (common)
4. Line sense detected on power-up (occasional)
5. Prep or Expose switch detected on power-up (occasional)

First check

Measure battery voltage

Test point: Battery
Expected: ≥112VDC, ≥

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X−RAY BYTE LIMIT error radiation

One or more x-ray calibration parameters out of range after adjustment

Ranked causes

1. Incorrect mA value entered during mAs calibration (common)
2. CPU to Filament/kVp Board connection fault (occasional)
3. Filament and kVp Board TP-2 frequency out of spec (occasional)
4. mA meter not working properly (occasional)
5. Insufficient taps calibrated without exceeding max kVp (occasional)

First check

Verify correct mA value entered during mAs calibration

Test point: Calibration input
Expected: Correct mA value as specified

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

Circuit breaker trips during battery charging caution

When AC power applied to battery charger, main circuit breaker immediately trips; no charging occurs

Ranked causes

1. Battery voltage below 110 volts (common)
2. Charger board defective (occasional)
3. Short circuit in battery charger or circuit breaker (rare)
4. CPU generating false trip signal due to fault (occasional)

First check

Measure battery voltage during charging attempt

Test point: Battery terminals
Expected: 110 volts or above V, minimum 110 V

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

Circuit breaker trips during charging high voltage

Safety breaker activates when system attempts to charge batteries

Ranked causes

1. Cooling fan not running (common)
2. Battery voltage below 110 volts (occasional)
3. Defective power cord or blown fuse (occasional)
4. Current overload or software-driven trip signal (occasional)

First check

Verify cooling fan runs when plugged in

Test point: Cooling fan motor
Expected: Fan operates continuously when unit plugged in

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Circuit breaker trips during operation

Breaker trips under load or shortly after power-on

Ranked causes

1. Battery voltage below 110 volts (common)
2. Last exposure terminated by backup timer (occasional)
3. kV setting 15 kV above selected value (occasional)
4. mA above 150 mA (occasional)

First check

Measure battery voltage when breaker trips

Test point: Battery terminals
Expected: Above 110 volts V, above
Tools: Voltmeter

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Collimator field size exceeds tolerance radiation

X-ray field size does not match image receptor size within acceptable limits during size-to-size test

Ranked causes

1. Collimator misalignment or malfunction for Bucky or cassette holder (common)
2. SFD (spot film device) collimator misalignment (common)
3. Gantry-mounted film changer collimator misalignment (common)
4. Digital system collimator misalignment (common)

First check

Measure light field size at collimator window

Test point: Collimator window
Expected: Compare to arbitrary units on graph paper pattern
Tools: Finely ruled graph paper, ruler

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

DRIVE WORD LIMIT error

Drive port reading exceeded upper or lower calibration limit

Ranked causes

1. Drive handle transducer out of calibration (common)
2. Transducer voltage supply low (occasional)
3. Transducer output not responding to handle movement (occasional)
4. Transducer output out of voltage range (occasional)

First check

Verify drive handle transducers wiring integrity

Test point: Drive transducer connectors
Expected: Secure connection with no damage

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Error 458 with 320 error also present caution

Rotor does not turn, rotor error 458 displayed

Ranked causes

1. Rotor switch not energizing relay K-39 (common)
2. CPU board fault (occasional)
3. Rotor Controller Board failure (occasional)
4. CPU board signal path fault (rare)

First check

Rotor audible feedback

Test point: Rotor assembly
Expected: Rotor turning sound heard

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

Error code 320 - rotor control fault high voltage

Complex rotor control system failure indicated by error 320, requires systematic troubleshooting of fuse, signals, and transformer

Ranked causes

1. Fuse F-93 on rotor board blown (common)
2. Excessive current in transformer T-1 secondary circuits (occasional)
3. Rotor control board fault (occasional)
4. CPU board fault (occasional)

First check

Check if fuse F-93 on rotor board is blown

Test point: F-93
Expected: Fuse intact (not blown)
Tools: Visual inspection

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Error Code 432 high voltage

System displays Error Code 432 during preparation phase

Ranked causes

1. Fil/kVp board voltage at TP-8 incorrect (common)
2. Signal at J5-1 & 3 of Fil/kVp board incorrect (common)
3. Cathode HV cable disconnected or damaged (occasional)
4. Fil/kVp board failure (occasional)

First check

Measure voltage at TP-8 of Fil/kVp board

Test point: TP-8
Expected: equal to example waveform
Tools: Oscilloscope

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Error code 437 spurious X-ray trigger high voltage

X-ray generation occurred spontaneously or without expected hand switch activation

Ranked causes

1. Safety contactor connection fault (common)
2. Battery connection defect (common)
3. Charger board failure (occasional)
4. CPU board failure (occasional)

First check

Determine if error occurred after exposure

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Error code 43A: rotor does not respond to Prep switch high voltage

Rotor not spinning when Prep switch pressed; collimator field light does not turn off

Ranked causes

1. CPU to Rotor Controller interconnection issue (common)
2. Rotor Select signal not reaching controller (CR-38) (occasional)
3. Relay K-39 defective (occasional)
4. CPU board defective (rare)

First check

Listen for rotor rotation

Test point: X-ray tube rotor bearing
Expected: Audible rotor sound

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Error code 456 triggered radiation

X-ray system halts on error code 456; tap relay fault detected

Ranked causes

1. Tap relay not responding to control signal (common)
2. Tap relay control signal lost (occasional)
3. CPU to 1 kHz inverter interconnect failure (occasional)
4. CPU board failure (occasional)

First check

Visually inspect tap relays for energization

Test point: Tap relays K1-K6 on control board
Expected: No relays energized or only appropriate relay energized per operational state

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Error Code 45C high voltage

1 kHz inverter ready signal or voltage issues detected during system startup or operation.

Ranked causes

1. 1 kHz inverter board failure (common)
2. Loose or broken interconnect cable to 1 kHz inverter board (occasional)
3. Capacitor C-12 discharge or failure (occasional)
4. 60 Hz inverter fault (occasional)

First check

Verify 1 kHz inverter ready signal presence

Test point: J-1 pin 12
Expected: High
Tools: Oscilloscope or logic probe

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Error code 462 - kVp waveform distortion high voltage

kVp output waveform shows abnormal shape during X-ray exposure

Ranked causes

1. Filament/kVp board waveform output fault (common)
2. CPU board timing or control fault (occasional)
3. Battery cell failure causing voltage sag (occasional)
4. System calibration drift (occasional)

First check

Set to 50 kVp and 0.4 mAs

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HVL test troubleshooting: kVp or filtration issue radiation

Diagnostic flowchart to identify root cause when HVL is out of specification after initial measurement

Ranked causes

1. kVp accuracy out of specification (common)
2. Test setup error or probe saturation (common)
3. Measurement instrument out of calibration (occasional)
4. System-level interactions or X-ray tube issue (rare)

First check

Verify actual kVp output at 80 kVp setting

Test point: System high voltage output
Expected: 80 kVp ±1 kVp (or per system specification)
Tools: RMI 230 or equivalent 1 kVp accuracy meter

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Left Drive feedback high caution

Motor drive system reports excessive feedback from left motor

Ranked causes

1. Drive Power Amplifier Board failure (common)
2. Drive fuse blown (common)
3. Motor wiring or connector problem (occasional)
4. Right motor short or defective motor (rare)

First check

Exchange J-1 & J2 connectors temporarily

Test point: Motor connectors J-1, J-2
Expected: error follows exchange if amplifier is faulty

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Left drive wheel stalls or has no torque

Error Code 12 triggered. Left motor stall signal detected. Occasional or constant stalling.

Ranked causes

1. Left brake dragging (common)
2. Left motor electrical or mechanical failure (occasional)
3. Mechanical problems in left drive wheel (occasional)
4. Left drive motor failure (rare)

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

Motor relays K-1 & K-2 not energized on drive handle release

Motor relays K-1 and K-2 do not energize when the technician presses the release on the drive handle

Ranked causes

1. Open fuse A5F1 or A5F2 (common)
2. Broken wire or poor crimp between J-4 and relays (occasional)
3. No 24 VDC at J-4 pin 1 to power ground (occasional)
4. CPU board pin 13 (U322) signal not high (occasional)

First check

Check fuses A5F1 and A5F2

Test point: Fuses A5F1, A5F2
Expected: Fuses intact and continuous

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Tap error 2: kVp exceeded 140V at tap selection high voltage

Tap produced higher kilovoltage than expected; tube voltage exceeds specification for selected tap

Ranked causes

1. Tap calibration procedure error (common)
2. mAs calibration error affecting kVp measurement (common)
3. kVp calibration out of range (common)
4. Generator tap relay wiring miswired or stuck (occasional)

First check

Verify mAs calibration

Test point: Current measurement
Expected: Within specification
Tools: mAs calibration procedure

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Tap error 5: Insufficient filament emission current

Even at maximum filament current setting, tube does not produce required emission current

Ranked causes

1. mAs calibration out of specification (common)
2. Filament current voltage out of specification (common)
3. Tap relay wiring incorrect (occasional)
4. Tap calibration procedure incomplete (occasional)

First check

Verify mAs calibration

Test point: Current measurement circuit
Expected: Within specification
Tools: mAs calibration procedure

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Tap error 6: Filament emission too high at minimum

Even at minimum filament current setting, tube produces excessive emission current

Ranked causes

1. mAs calibration error (common)
2. Filament current voltage excessive (common)
3. Tap relay wiring incorrect (occasional)
4. Tap calibration procedure error (occasional)

First check

Verify mAs calibration

Test point: Current measurement circuit
Expected: Within specification
Tools: mAs calibration procedure

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X-ray ON light unwanted signal high voltage

X-ray ON light signals without pressing hand switch during exposure

Ranked causes

1. Safety contactor connection fault (common)
2. Battery connection defect (common)
3. Charger board failure (occasional)
4. CPU board failure (occasional)

First check

Did error occur after an exposure

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

Battery charger circuit breaker trips high voltage

Electrical circuit breaker trips when attempting to charge battery

Ranked causes

1. Low battery voltage triggers charging fault (common)
2. CPU drawing excessive current during charging (occasional)
3. Wiring short circuit or fault (rare)

First check

Verify circuit breaker trips during charging

Test point: Main circuit breaker
Expected: Breaker trips (OFF position) when charger activated

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

Battery charger error codes displayed high voltage

Unit displays one of error codes 101, 102, 103, 104 on battery charger system

Ranked causes

1. Charger board needs recalibration (common)
2. Faulty charger board (occasional)
3. Safety contactor stuck contacts (Error 103 only) (occasional)

First check

Are there any error codes displayed on battery charger

Test point: Battery charger display
Expected: Display shows error codes from list
Tools: Visual inspection

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

Battery error 1: Counter overflow during voltage measurement

Hardware counter exceeded capacity while measuring battery voltage

Ranked causes

1. Charger Board frequency at TP-6 exceeds 10 kHz (common)
2. Multiplexer U76 (46-288786G2) or Q1004/Q1005/Q1006 (5350026) malfunction (common)
3. Battery voltage measurement circuit defect (occasional)

First check

Measure frequency at Charger Board TP-6

Test point: Charger Board TP-6
Expected: <10 kHz
Tools: Oscilloscope or frequency counter

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

Battery word limit: Calibration limit exceeded

Battery calibration data exceeded upper or lower limit during measurement

Ranked causes

1. Voltmeter calibration out of range (common)
2. CPU-Charger Board connection loose or defective (occasional)
3. Charger Board frequency out of specification (occasional)

First check

Calibrate voltmeter

Test point: Voltmeter circuit
Expected: Within specification after calibration
Tools: DMM, calibration standard

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

Cable assembly with broken wires caution

Visible or hidden broken wires in steel cables detected during visual inspection or by running a soft cloth over the surface. Crown breaks show protruding wire ends; valley and internal breaks may not be visible.

Ranked causes

1. Normal deterioration from abuse, wear and fatigue (common)
2. Crown fatigue wire breaks in outer wires (occasional)
3. Valley wire breaks indicating advanced deterioration (occasional)

First check

Visual inspection of cable surface for broken wires

Test point: Entire length of cable
Expected: No visible broken wire ends protruding from cable
Tools: Soft cloth, flashlight

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

Calibration: Fluoro entrance exposure rate radiation

Measurement and verification of fluoroscopic X-ray entrance exposure rate to ensure compliance with regulatory limits across different system configurations and operating modes.

Ranked causes

1. Insufficient filtration (HVL too low) (common)
2. Probe not centered (common)
3. Incorrect set-up (occasional)

First check

Verify probe positioning in primary beam

Test point: Probe active volume
Expected: Centered in primary beam with entire active volume within beam

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

Calibration: Technique accuracy and indirect linearity radiation

Verify kVp and mA accuracy across filament settings (60, 80, 130 kVp) using non-invasive meter and 3382 form software; assess linearity flags.

Ranked causes

1. Meter calibration drift or inaccuracy (common)
2. mA station or kV calibration error in row (common)
3. Linearity calibration drift (occasional)

First check

Ensure tubes are warmed up prior to test

Test point: RAD tube and SF tube in R013
Expected: Tubes warmed up

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

Charger error 2: Missing charge current frequency

Battery charger current measurement signal is absent during calibration

Ranked causes

1. CPU-Charger Board connection broken or loose (common)
2. Digital-to-Analog Converter output too low (common)
3. Charger is not charging or charging resistor is open (common)

First check

Inspect CPU-Charger connectors

Test point: Board interconnect connectors
Expected: Firm, clean, undamaged connections

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

Collimator blades not visible or misaligned on monitor radiation

X-ray field displayed on monitor does not match actual beam area; collimator blades not visible or visible incorrectly during fluoroscopy

Ranked causes

1. Collimator gain setting incorrect (common)
2. Detector alignment off (occasional)
3. Maximum collimator gain limit reached (rare)

First check

Verify collimator blade visibility at all field sizes

Test point: Monitor display
Expected: 4 blades visible in Auto mode at maximum opening for all image tube field sizes (16, 12, 9, 6, 4.5 inch) and SID positions

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

Error Code 12 displayed

Left stall signal detected; motor may experience occasional or constant stalling on left side

Ranked causes

1. Normal condition on inclines or elevators (common)
2. Left brake dragging (occasional)
3. Drive motor defective (occasional)

First check

Determine if error is occasional or constant

Test point: Error log display
Expected: occasional or constant occurrence

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

Error Code 19 Invalid drive command

Motor drive command invalid or not recognized; may include blown fuses in drive circuit

Ranked causes

1. Drive fuse blown (common)
2. Motor or mechanical drive issue (occasional)
3. Drive Power Amplifier failure (occasional)

First check

Determine if fault is occasional or constant occurrence

Test point: Error log or observation
Expected: Occasional or Constant
Tools: System observation

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

Error Code 210 Left Stall feedback

Left motor stall or feedback error detected; motor unable to move or position left function

Ranked causes

1. Left motor or connector issue (common)
2. Right motor now stalled if fault moves to error 211 (occasional)
3. Mechanical binding or brake issue (occasional)

First check

Determine if fault is with motor or amplifier by swapping connectors

Test point: Connectors J-1 and J-2
Expected: Error moves to opposite side or persists
Tools: Connector swap

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

More symptoms

Error Code 218: Drive Handle out of range
Error code 320 - continued troubleshooting
Error code 321 - continued troubleshooting
Error Code 431
Error code 432 - kVp feedback fault
Error code 433 - kVp control voltage fault
Error Code 435 - Tap Relays not pulling in on Prep
Error Code 436 during prep operation
Error Code 439
Error code 453: no rotor speed feedback
Error code 45B - filament demand signal fault
Error code 463 - kVp regulation failure
HANDLE CAL ERR 4 displayed
HIGH FIL LIMIT error
KVP CAL ERROR 2 displayed
KVP CAL ERROR 4 displayed
LOW FIL LIMIT error
Motor stall feedback error 210
Right Drive feedback high
Rotor board fuse F-93 blown
SYS RESIST LIMIT error
Tap error 1: Target mA not reached
TURN RATIO LIMIT error
VOLTMETER ERR 4 displayed
X-ray exposure error code 466
X-ray exposure waveform abnormal
X-ray tube rotor does not turn on prep
Battery does not charge
Battery error 2: Low battery voltage detected
Battery error 3: High battery voltage detected
Battery error 4: Voltage value not saved
Battery voltage low
Battery voltage out of range
Charger error 1: Counter overflow during current measurement
Charger fault - battery overcharge condition
Circuit breaker trips when attempting exposure
Collimator light field misaligned with X-ray field
Collimator locks stuck in locked position
Constant left motor stall or severe drive degradation
Constant right motor stall or severe drive degradation
Control cable leads improperly connected at terminal block
Electrostatic discharge interference
Error 45C inverter signal fault
Error Code 217: Right Drive feedback low
Error code 322 generation
Error Code 435 - Tap Relay feedback missing
Error Code 436 - U13 pin 6 control signal not transitioning
Error Code 43B
Error code 456 during prep
Filament boost duration abnormal during tube prep
Filtration cup missing or not transferred on tube replacement
Half-value layer (HVL) too low
Invalid drive command or unusual motor command sequence
KVP CAL ERROR 1 displayed
kVp measured value outside specification limits
Left Drive feedback low
MAS CAL ERROR 1 displayed
MAS CAL ERROR 4 displayed
Occasional right motor stall during normal operation
Primary barrier transmission exceeds regulatory limit
Right Drive feedback low
Safety Contactor K7 not energizing
Tap error 4: Tap combination inverted
Tube leakage radiation exceeds regulatory limit
VOLTMETER ERR 1 displayed
X-ray exposure error code 465
X-ray tube does not rotate smoothly in yoke assembly
X-ray turns on without hand switch activation
10-minute continuous fluoro timer cutoff not functioning (Innova 4100/3100/2100-IQ systems)
5-minute fluoro cumulative timer warning not triggered (Innova 4100/3100/2100-IQ systems)
AEC minimum exposure time verification
Audible tone missing at 5-minute fluoroscopic exposure termination
Audible tone missing at radiographic exposure termination
Audible tone not functioning for radiographic exposure or fluoro recording termination
Audible tone or buzzer not sounding at exposure termination
Auto collimator does not enter AUTO mode at specified SID
Auto collimator shutters do not limit beam to visual area in fluoroscopy
Automatic Exposure Control (AEC) reset malfunction
Automatic exposure control 600 mAs/2000 mAs backup reset or visual indication not functioning
Battery charger interconnection failure
Battery compartment cover not properly sealed or torqued
Battery voltage above normal during prep
Battery voltage below normal during prep
Battery voltage display disagreement
Brake switch inoperative or stuck
Cable shielding and grounding inadequate
Cable stud nuts loosened or detached
Calibration: AEC Maximum mAs
Calibration: AMX-4 Cal Handle
Calibration: AMX-4 Drive Handle
Calibration: AMX-4 System
Calibration: AMX-4 Taps
Calibration: Beam Quality (HVL) Test at 80 kVp
Calibration: Beam quality half-value layer
Calibration: Center to Center Test Procedure Documentation
Calibration: Collimator function and coverage
Calibration: Collimator Light Field Intensity
Calibration: Collimator light field intensity adjustment
Calibration: CPU board voltages
Calibration: End service mode
Calibration: Fluoro collimator opening range
Calibration: Fluoro Collimator to Spot-Film Alignment
Calibration: kV
Calibration: kV curve
Calibration: kV meter voltage adjustment
Calibration: kVp and mA accuracy verification
Calibration: Loading default values
Calibration: mAs metering accuracy
Calibration: Primary barrier transmission test setup
Calibration: Reproducibility
Calibration: Reproducibility of Exposure
Calibration: Reproducibility of Exposure (non-A.E.C. mode)
Calibration: Reproducibility of radiation output
Calibration: X-ray field to image receptor alignment
Charger byte limit: Charger calibration byte limit exceeded
CHECK SUM ERR 10 displayed
CHECK SUM ERR 11 displayed
Checksum error 1: Drive calibration bytes checksum failed
Checksum error 2: Drive calibration words checksum failed
Checksum error 3: Charger calibration bytes checksum failed
Checksum error 4: Charger calibration words checksum failed
Checksum error 5: Battery calibration words checksum failed
Checksum error 6: X-ray calibration bytes checksum failed
Checksum error 7: X-ray calibration words checksum failed
Checksum error 8: Field light calibration bytes checksum failed
Checksum error 9: Turns ratio word checksum failed
Circuit breaker trips
Circuit breaker trips on motor drive
Code 42F displayed
Collimator blades do not move to new position within required time
Collimator blades not visible in magnification mode
Collimator crosshair misaligned with light field
Collimator field verification for multiple formats
Collimator function verification
Continuous Frt/Lat fluoro timer cutoff not functioning at 10 minutes (Innova 2121-IQ/3131-IQ systems)
CPU trips main circuit breaker when battery voltage is low
Cumulative timer Frt/Lat not functioning correctly (Innova 2121-IQ/3131-IQ systems)
Degraded electromagnetic compatibility from non-specified accessories
Drive belt tension adjustment
Electromagnetic interference from nearby equipment
Electromagnetic interference from RF devices
Electrostatic discharge affecting system performance
Electrostatic discharge interference affecting equipment operation
EMC interference from adjacent or stacked equipment
EMC interference from electrostatic discharge
EMC interference from external static magnetic field
EMC interference from improper power supply distribution
Equipment malfunction due to adjacent or stacked equipment interference
Equipment malfunction due to improper power distribution
Equipment malfunction due to incorrect power distribution
Equipment malfunction due to use of non-specified accessories or cables
Error 466: X-ray exposure not functioning
Error code 321 - 60Hz inverter fault
Error Code 430
Error code 435 - tap relay pull-in failure
Error code 454: 1 kHz driver signal absent
Error code 45A - leakage compensation signal fault
Error Code 45D
Error code 460 - X-ray tube circuit wiring fault
Error code 465 - battery voltage sag
Exposure reproducibility failed in non-AEC mode
Field light switch inoperative or stuck
Field size pointer misaligned with actual X-ray field
FLDLIT TIME LIMIT error
FLDLT BYTE LIMIT error
Fluoro collimator to image intensifier alignment
Fluoro timer does not provide audible warning at 30 seconds (systems before June 2006)
Generator operator indicators not functioning properly
High voltage connectors corroded or damaged
Image interference from nearby radio frequency devices
Image interference from RF sources
Image overlap exceeds receptor edges
In-table fluoro collimator shutters do not respond to cassette change
Incorrect battery polarity installed
Incorrect Fil/kVp board waveform
Indicator lamps not mounted or functional on multi-tube systems
Indirect linearity out of specification
Indirect Linearity test failure
Interference from adjacent or stacked equipment
Interference from external static magnetic field
Interlock switch mounting loose or missing
kVp output does not match selected value
Left Drive feedback low (continued troubleshooting)
Light and X-ray field misalignment exceeds tolerance
mA Shunt resistor accuracy verification
Manual collimator installed on incorrect system type
mAs metering accuracy out of tolerance
Mixed battery types installed
Motor drive does not respond
Motor drive does not respond to release command
No visual indication of 600 mAs/2000 mAs backup activation
Occasional left motor stall during normal operation
Primary barrier transmission exceeds limit
Push-pull driver circuit not functioning
Push-Pull driver circuit shorted or stuck on
Radio frequency interference from equipment
Radio frequency interference from interconnect cables
RAM READBACK ERR displayed
RF interference from adjacent or stacked equipment
RF interference from mobile phones or transceivers
SFD field size specification validation
SID indicator accuracy out of tolerance
Static magnetic field interference
Static magnetic field interference from external sources
Tap error 7: Tap calibration data out of limits
Tube error 1: Tube calibration failed
Tube error 3: Filament current table limit exceeded
Unit preps before wait light is off
Verify X-Ray tube mA accuracy
Voltage to Frequency Converter output out of range
X-ray exposure allowed at incorrect SID on vascular collimator
X-ray exposure possible with spot-film device not locked
X-ray field center misaligned with receptor center
X-ray field exceeds image receptor bounds
X-ray field overlap exceeds specification
X-ray warning label missing or illegible
X-ray warning label missing or incorrect on main control panel
X-ray warning label missing or not present

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

Error codes

Code	Meaning	Trigger	Severity
`101`	Battery charger error condition	Charger board malfunction or calibration error	error
`102`	Battery charger error condition	Charger board malfunction or calibration error	error
`103`	Battery charger error condition with possible safety contactor issue	Charger board malfunction, calibration error, or stuck safety contactor	error
`104`	Battery charger error	Battery charger malfunction or miscalibration	error
`104`	Charger fault error from excessive charging or bad charger board	Battery charged to too high level and unit remains plugged in, or charger board failure	error
`105`	Battery charger or battery fault	Charging or battery condition issue	error
`106`	Battery charger connection or component failure	Charger board or connection issue	error
`107`	CPU to charger board connection failure	Communication or connection problem between CPU and charger	error
`12`	Left stall signal detected	Left motor fails to rotate under load or excessive friction detected in left drive	warning
`13`	Right stall signal detected	Right motor fails to rotate under load or excessive friction detected in right drive	warning
`210`	Left stall feedback error	Motor drive cannot move unit left; stall current detected	error
`211`	Right stall feedback error	Motor drive cannot move unit right; stall current detected	error
`214`	Left Drive feedback signal high	Motor drive feedback circuit detects excessive signal	error
`215`	Left Drive feedback signal low (continued)	Motor drive feedback circuit detects insufficient signal from left motor	error
`216`	Right Drive feedback signal high	Motor drive feedback circuit detects excessive signal	error
`217`	Right Drive feedback low	Power-up or during operation when right drive feedback signal drops below acceptable threshold	error
`218`	Drive Handle out of range	Power-up when drive handle position sensor reading outside expected range	error
`320`	Rotor control system fault	Rotor motor control circuit failure or component malfunction	error
`321`	60Hz inverter circuit fault	60Hz inverter output failure or signal degradation	error
`322`	Battery voltage critically low	Battery voltage monitoring check	critical
`322`	Battery or charger fault detected	Battery voltage below threshold or charger calibration failure during charging or system startup	warning
`326`	Battery charger interconnection error	Charger unable to communicate with or control charging via CPU board due to loose or broken connections	warning
`42F`	Calibration error requiring re-calibration	System re-calibration fails or drift exceeds tolerance	error
`430`	Collimator field light failure or CPU board signal fault	Field light inoperative or signal at TP-3 of Rotor board is LOW	error
`431`	kVp control voltage measurement failure or board fault	Voltage at TP-10 not at or close to 2.4V when 50 kVp selected	error
`432`	kVp measurement feedback signal fault	kVp feedback signal missing or incorrect at measurement points	error
`432`	Fil/kVp board voltage or signal error	Voltage at TP-8 or signal at J5-1 & 3 does not match example waveform	error
`433`	kVp control voltage out of specification	kVp control voltage not at expected 0.4V at R52 pins 14-15	error
`435`	Tap relay pull-in failure during prep	Tap relays do not energize when Prep button pressed	error
`435`	Prep sequence error - Tap relays or feedback failure	Tap relays do not pull in or relay feedback signals not received during Prep	error
`436`	Prep circuit malfunction	Error during equipment preparation	error
`436`	Prep sequence control signal error - U13 pin 6 not transitioning	U13 pin 6 signal fails to change from low to high during Prep sequence	error
`437`	Post-exposure fault with multiple possible causes	Occurs after X-ray exposure attempt	error
`437`	Spurious X-ray trigger during exposure - safety contactor or battery issue	X-ray ON signal without hand switch press after exposure	error
`437`	Prep connection issue	Error during preparation	error
`439`	kVp insufficient - X-ray output voltage below set level with extended exposure time	Measured kVp less than 75% of dialed kVp when exposure time exceeds 2 msec	error
`43A`	Rotor controller not responding to Prep command	Prep switch pressed; rotor does not accelerate	error
`43A`	Rotor not turning	Rotor motor failure during Prep	error
`44`	Battery voltage above operating range	Battery voltage exceeds maximum during prep phase	warning
`443`	Exposure stop command signal fault	Failure when checking 'Exp Stop Cmnd' signal at J4 pin 23 of CPU board	error
`45`	Battery voltage below operating range	Battery voltage below minimum during prep phase	warning
`453`	X-ray tube rotor speed feedback lost; 60 Hz inverter OK signal absent	During X-ray prep sequence; rotor fails to reach operating speed	error
`454`	1 kHz driver output signal missing; rotor timing clock absent	During system initialization or Prep sequence	error
`454`	1 kHz driver or CPU communication failure; insufficient control signal or power supply problem	1 kHz driver board unable to provide control signal or CPU unable to receive signal; voltage supply below specification	error
`456`	Tap relay control circuit failure; relay not responding to control commands	Tap relay unable to energize or deenergize when commanded; control signal lost or relay coil fault	error
`456`	Prep sequence failure	Occurs during system prep sequence when DO NOT press Prep switch	error
`457`	X-ray tube rotor failure	Rotor does not turn or control signal missing	error
`458`	Prep failure with possible 320 error	Multiple error condition during prep	error
`459`	kVp demand feedback signal fault	kVp demand feedback voltage does not change when kV is adjusted	error
`45A`	Leakage compensation signal fault	Leakage compensation signal missing or does not change with kV	error
`45B`	Filament demand control signal fault	Filament demand signal missing or does not vary with kV	error
`45C`	1 kHz inverter failure or voltage issue	System startup or runtime detection of inverter signal loss or voltage out of range	error
`45D`	Fil/kVp control board communication or waveform error	Filament/kilovoltage control board malfunctions during X-ray prep	critical
`45E`	Filament circuit control error or HV cathode issue	X-ray tube filament control board detects circuit fault during prep	critical
`45E`	Filament short detected after cathode cable removal	Filament short detection system triggered when cathode disconnected	info
`45F`	Filament boost signal timing error during tube preparation	Filament boost waveform duration or shape incorrect; Preheat signal timing abnormal	error
`45F`	Filament circuit fault or short detection error	Filament current does not reduce after initial boost period or cathode shorted	error
`45F`	X-ray tube cathode connection error or Fil/kVp board failure	Cathode cable disconnection or filament control board fault detected	critical
`460`	X-ray tube circuit wiring fault	Wiring integrity loss in X-ray tube interconnect	critical
`461`	X-ray tube rotor does not turn or rotor speed signal missing after prep	Rotor fails to spin when Prep switch depressed; 60 Hz Inverter OK signal not detected on pin 5 of J1	error
`462`	kVp output compliance failure during high-power exposure	kVp output voltage insufficient or unstable during prolonged high mAs exposure at 80 kVp	error
`465`	Battery voltage insufficient or batteries soft during X-ray exposure	System attempts X-ray exposure with weak battery voltage	error
`466`	X-ray ON signal integrity or control board fault during exposure	X-ray ON signal not oscillating or control board experiencing excessive noise during exposure attempt	error
`467`	X-ray exposure waveform abnormality	Waveform peak voltage drops during exposure or pulse width incorrect	error
`469`	Safety Contactor K7 failure	Safety Contactor K7 fails to energize or stay in during X-ray exposure	critical
`469`	X-ray exposure system error	Error occurs during X-ray tube operation or filament/kVp control	error
`BATRY WORD LIMIT`	Battery calibration limit exceeded	Battery calibration data word exceeds upper or lower specification limit	error
`BATTERY ERROR 1`	Battery voltage measurement counter overflow	Counter exceeded capacity during battery voltage measurement at Charger Board	error
`BATTERY ERROR 2`	Battery voltage too low	Battery voltage measured below 80 volts during calibration	error
`BATTERY ERROR 3`	Battery voltage too high	Battery voltage measured above 150 volts during calibration	error
`BATTERY ERROR 4`	Battery voltage not saved during calibration	Invalid condition detected; could not determine if voltage was loaded or unloaded value	error
`CAL CHGR ERR 1`	Charger current measurement counter overflow	Counter exceeded capacity during charging current measurement	error
`CAL CHGR ERR 2`	Charger current measurement missing	No charge current frequency detected during battery charger measurement	error
`CAL CHGR ERR 3`	Charger calibration limit exceeded	Charger calibration data exceeds upper or lower specification limit	error
`CALDAT WARNING`	Calibration data exceeds specification limits	Any calibration parameter exceeds maximum or minimum allowed value	warning
`CAL TAP ERROR 1`	Tap calibration cannot reach target mA	Proper tube current cannot be achieved by changing kVp during tap calibration	error
`CAL TAP ERROR 2`	Tap produces excessive kVp	Tube voltage exceeds 140 kVp at tap selection that should provide less than 140 kVp	error
`CAL TAP ERROR 3`	35 kVp tap produces insufficient voltage	35 kVp tap selection produces less than specified voltage	error
`CAL TAP ERROR 4`	Tap hierarchy inverted	Higher order tap produces less kVp than lower order tap	error
`CAL TAP ERROR 5`	Filament current insufficient	Even at maximum filament current, tube does not produce required emission current	error
`CAL TAP ERROR 6`	Filament emission too high	At minimum filament current setting, tube produces excessive emission current	error
`CAL TAP ERROR 7`	Tap calibration data out of limits	One or more tap calibration parameters exceed upper or lower specification limit	error
`CAL TUBE ERR 1`	Tube calibration failed after limit error	Always occurs following a limit error during tube calibration	error
`CAL TUBE ERR 3`	Filament current table limit exceeded	One or more filament current calibration table data field limits exceeded	error
`Cal Tube Error 1`			unknown
`Cal Tube Error 3`			unknown
`CHARG BYTE LIMIT`	Charger byte limit exceeded	Charger calibration byte data exceeds upper or lower specification limit	error
`CHARG WORD LIMIT`	Charger word limit exceeded	Charger calibration word data exceeds upper or lower specification limit	error
`CHECK SUM ERR 1`	Drive calibration bytes checksum failed	Checksum verification failed for drive calibration byte data	error
`CHECK SUM ERR 10`	X-Ray circuit resistance words check sum failed	During generator calibration or startup	error
`CHECK SUM ERR 11`	Filament current tables have check sum error or were not calibrated	During filament current calibration or startup	error
`CHECK SUM ERR 2`	Drive calibration words checksum failed	Checksum verification failed for drive calibration word data	error
`CHECK SUM ERR 3`	Charger calibration bytes checksum failed	Checksum verification failed for charger calibration byte data	error
`CHECK SUM ERR 4`	Charger calibration words checksum failed	Checksum verification failed for charger calibration word data	error
`CHECK SUM ERR 5`	Battery calibration words checksum failed	Checksum verification failed for battery calibration word data	error
`CHECK SUM ERR 6`	X-ray calibration bytes checksum failed	Checksum verification failed for x-ray generator calibration byte data	error
`CHECK SUM ERR 7`	X-ray calibration words checksum failed	Checksum verification failed for x-ray generator calibration word data	error
`CHECK SUM ERR 8`	Field light calibration bytes checksum failed	Checksum verification failed for field light calibration byte data	error
`CHECK SUM ERR 9`	Turns ratio word checksum failed	Checksum verification failed for turns ratio calibration word data	error
`DRIVE BYTE LIMIT`	Drive port reading exceeded upper or lower calibration limit	During drive calibration or when handle position is read	error
`DRIVE WORD LIMIT`	Drive port reading exceeded upper or lower calibration limit	During drive calibration or when handle position is read	error
`EPROM Checksum Error`	EPROM memory checksum validation failed	EPROM checksum test failed during power-up diagnostics	critical
`Error 12`	Left stall signal detected	Left motor cannot maintain torque; stall condition detected by control electronics	error
`Error 13`	Right stall signal detected	Right motor cannot maintain torque; stall condition detected by control electronics	error
`Error 19`	Invalid drive command	Motor received command outside expected sequence or during low-resistance operation	warning
`FLDLIT TIME LIMIT`	Invalid time was entered during field light calibration	During field light calibration if time parameter is out of valid range	error
`FLDLT BYTE LIMIT`	Field light data reading exceeded upper or lower time limit	During field light calibration when reading exceeds limits	error
`HANDLE CAL ERR 4`	Improper polarity between zero, forward, and reverse calibration voltages	During handle calibration if voltage polarity is incorrect	error
`HIGH FIL LIMIT`	One or more filament current calibration parameters exceed the upper limit	During filament current calibration or mAs calibration if filament current is too high	warning
`HNDL CAL ERR 1`	Drive handle zero point value limit exceeded	During handle calibration when zero point reading is out of range	error
`HNDL CAL ERR 2`	Calculated forward gain was out of range during handle calibration	During handle forward calibration when gain calculation exceeds limits	error
`HNDL CAL ERR 3`	Calculated reverse gain was out of range during handle calibration	During handle reverse calibration when gain calculation exceeds limits	error
`KVP CAL ERROR 1`	Required kVp and mA cannot be reached; tap combinations insufficient	During kVp calibration when required voltage cannot be achieved with available taps	error
`KVP Cal Error 2`	kVp calibration error type 2	kVp calibration procedure failure	error
`KVP CAL ERROR 2`	No tap relays pulled in; required kVp and mA still cannot be reached	During kVp calibration when tap relays fail to energize	critical
`KVP CAL ERROR 4`	One or more calibration parameters out of limits during kVp calibration	During kVp calibration when parameters exceed acceptable range	error
`KVP Cal Error 4`	kVp calibration error type 4	kVp calibration procedure failure	error
`LOW FIL LIMIT`	One or more filament current parameters below minimum allowed	During filament current calibration or mAs calibration if filament current is too low	warning
`Low Fil Limit`	Low filament limit exceeded	Filament current below acceptable range	warning
`MAS Cal Error 1`	mAs calibration error type 1	mAs calibration procedure failure	error
`MAS CAL ERROR 1`	Injected current frequency too high during mAs meter calibration; counter overflow	During mAs calibration when frequency exceeds limit	error
`MAS CAL ERROR 4`	Database parameters not being written correctly during mAs calibration	During mAs calibration when data write verification fails	error
`MAS Cal Error 4`	mAs calibration error type 4	mAs calibration procedure failure	error
`RAM READBACK ERR`	Data read from memory location differs from what was written	During calibration when memory verification fails	error
`RAM Readback Error`	RAM readback verification failure	Memory readback check fails during system test	critical
`Sys Resist Limit`	System resistance limit exceeded	High-voltage circuit resistance measurement out of range	error
`SYS RESIST LIMIT`	Emission current versus kVp slope out of range during tap calibration	During tap calibration when slope is too flat or too steep	error
`TURN RATIO LIMIT`	Battery voltage to kVp multiplication factor (turns ratio) out of range	During tap calibration for one or more tap combinations	error
`VOLTMETER ERR 1`	Battery voltage frequency too high; counter overflow during calibration	During voltmeter calibration when frequency exceeds limit	error
`VOLTMETER ERR 4`	Battery voltage calibration data out of range	During voltmeter calibration when parameters exceed limits	error
`Voltmeter Error 1`	Voltmeter reading error type 1	Voltmeter measurement discrepancy detected	error
`Voltmeter Error 4`	Voltmeter reading error type 4	Voltmeter measurement discrepancy detected	error
`X-ray Byte Limit`	X-ray parameter byte value out of range	X-ray parameter exceeds single-byte limit	error
`X−RAY BYTE LIMIT`	One or more x-ray calibration parameters out of range after adjustment	During mAs or tap calibration when parameters exceed limits	error
`X−RAY WORD LIMIT`	One or more x-ray calibration parameters out of limits after adjustment	During mAs, kVp, or filament table calibration when parameters exceed limits	error
`X-ray Word Limit`	X-ray parameter word value out of range	X-ray parameter exceeds word-size limit	error

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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.