Test equipment RF converter test kits · Optimus family

Philips Converter test kit: troubleshooting and error codes

The ServiceForge knowledge base holds 63 documented symptoms for the Philips Converter test kit, with 72 ranked causes, 141 diagnostic checks with test points and expected values, and 8 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

ENF1 circuit breaker tripped high voltage

ENF1 breaker trips, possibly with mains fuses also tripped

Ranked causes

1. kV unit malfunction (kV-control, kV-power, converter, HV transformer) (common)
2. External parts failure (HV cable or tube) (occasional)

First check

Measure DC voltage on PCB kV-power EQ100

Test point: E2 – C1 at both converters
Expected: < 10VDC, < 10
Tools: DMM

ENF1, ENF2, or ENF3 protection relay tripped high voltage

One or more ENF (mains fuse protection) relays have activated. Mains fuses may also have tripped.

Ranked causes

1. Rotor control unit fault (EY or EYA) (common)
2. Other electrical fault (occasional)

First check

Verify mains power is completely disconnected

Test point: Mains supply
Expected: Power off at room mains switch or earth leakage current breaker

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

ENF2 circuit breaker tripped high voltage

ENF2 breaker trips, possibly with ENF1 and mains fuses also tripped

Ranked causes

1. Internal generator units malfunction (Optimus RAD or R/F) (unknown)
2. External units malfunction connected to breaker ENF2 (unknown)

Resonance frequency mismatch between converters high voltage

Optimus 65/80 with dual converters: individual resonance frequencies are not matched

Ranked causes

1. HV transformer in one converter out of tolerance (unknown)
2. Resonance capacitor(s) mismatched between converters (unknown)

First check

Measure resonance frequency of converter 1 primary coil

Test point: Converter 1 primary coil terminals
Expected: 17.160 kHz to 18.970 kHz, ±5%; 17.160–18.970 kHz

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

Resonance frequency out of range high voltage

Measured resonance frequency of primary coils or individual coils falls outside specified tolerance band

Ranked causes

1. HV transformer fault (unknown)
2. Resonance capacitor(s) out of tolerance (unknown)

First check

Measure resonance frequency of primary coils

Test point: Primary coil terminals
Expected: 17.160 kHz to 18.970 kHz, ±5% on inductance and capacitors; 17.160–18.970 kHz

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

Tube arcs during reconditioning high voltage

X-ray tube arcs (electrical discharge) at a specific kV step during the reconditioning procedure

Ranked causes

1. Tube contamination or surface defects requiring reconditioning (common)
2. Tube failure after multiple reconditioning attempts (rare)

First check

Monitor tube arcing during exposure sequence

Test point: EZ130 X3 AV_HT (high voltage monitor), ground at EZ130 X6
Expected: No arc during exposure
Tools: Oscilloscope probe (20kV/V), large focus only

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

Tube or high-voltage cable defect detected after high-voltage application high voltage

Defective tube or HV cable may not be evident from battery test, visual check, or audible check but becomes apparent when high voltage is applied. Procedure uses 1ms exposures to verify tube and cable integrity before full-power operation.

Ranked causes

1. Tube defective (unknown)
2. HV cable defective (unknown)

First check

Generator OFF and test cables established at backpanel service measuring points

Test point: EZX74 (CTRL_X_C/ cathode of diode) and EZX77 (X_ACT_S/ anode of diode)
Expected: Test cable with diode connected; resistor cable at mAs short-circuit plug EG100

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

TV image does not appear or appears too slowly after fluoroscopy start

TV image visibility delayed beyond acceptable response time after fluoroscopy is switched ON.

Ranked causes

1. Gain factor too low (occasional)
2. TV_pos_limit set too high (occasional)

First check

Measure current Gain factor setting

Test point: XRGSCOPE: OPTIMUS > Adjustments > Dose rate control > Amplification gain > CONT
Expected: Current Gain factor value (range 0.5 to 2.0)

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

TV image flashes or overshoots when fluoroscopy is switched on

Visible overshoot or flashing of TV image upon fluoroscopy activation, indicating excessive gain or rapid response.

Ranked causes

1. TV_pos_limit set too low (occasional)
2. Gain factor too high (rare)

First check

Measure overshoot on oscilloscope

Test point: Oscilloscope Y1 (EN X C/) and Y2 (DR DFP) during fluoroscopy ON transition
Expected: Overshoot ≤ 20% (final video level 100%, overshoot peak ≤ 120%)

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

Anode disk acceleration sounds during start-up

Audible noise from tube housing during generator start-up resembles acceleration even when disk was stationary before power-ON

Ranked causes

1. Normal brake sequence operation after mains restoration (common)

First check

Perform audible check at tube housing during start-up

Test point: tube housing
Expected: Brake sequence sounds present for approximately 40 seconds

Anode speed decreases rapidly after generator shutdown

Anode speed audibly decreases within 2-3 minutes after switching off generator with PREP held and free run engaged

Ranked causes

1. Tube vacuum lost or defective (common)

First check

Observe anode speed decrease after generator shutdown with PREP held

Test point: Tube housing
Expected: Anode speed remains high for several minutes

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Asymmetrical primary current waveform (Optimus 65/80) high voltage

Oscilloscope displays non-symmetrical waveform of primary current instead of expected symmetrical pattern

Ranked causes

1. HV transformer defective (common)

First check

Inspect waveform symmetry on oscilloscope

Test point: Primary current transformer secondary, both probes
Expected: Symmetrical waveform about center line

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Area Dose Calculator default adjustment radiation

Verify that the Area Dose Calculator displays accurate dose values at specified kV settings compared to measured doses

Ranked causes

1. Default yield curve requires correction when measured dose deviates from displayed value (occasional)

First check

Place lead plate and measuring cell in central radiation beam at 1 m distance (SMD)

Test point: Central radiation beam, table surface
Expected: Lead plate reduces scatter approximately 10%
Tools: Lead plate, calibrated dosemeter (DALI with cell 77334 or PMX3)

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

Calibration: Area Dose Calculator filter correction radiation

Correct filter attenuation factors (2 mm Al, 1 mm Al + 0.1 mm Cu, 1 mm Al + 0.2 mm Cu) for accurate dose product calculations

Ranked causes

1. Filter correction factors deviate from defaults and require update (occasional)

First check

Verify test setup and acceptance of dose values without filter from yield measurement or remeasurement

Test point: Measurement records
Expected: Dose values at kV checkpoints 50, 70, 100, 150 kV from section 1.2 measurements

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

Calibration: Area Dose Calculator reference files and defaults

Overview of default yield and filter correction reference files stored on floppy disk

Ranked causes

1. Need to restore or verify default calibration files (rare)

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Area Dose Calculator specific yield correction radiation

Correct the specific yield curve for X-ray tube output at multiple kV checkpoints to ensure accurate area dose calculations

Ranked causes

1. Measured specific yield values deviate from default curve and require update (occasional)

First check

Verify test setup: 1 m SMD, free cassette, kV-mAs-s technique, 10 mAs, 0.1 s, 10×10 cm collimation, no filter

Test point: Generator setup
Expected: Settings match section 1.2 prerequisites exactly

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

Calibration: Dose rate alignment for continuous fluoroscopy radiation

Adjust amplification factor so TV image becomes visible within 400ms after fluoroscopy switch-on and overshoot does not exceed 20% in quick mode or slightly higher in normal mode.

Ranked causes

1. Initial DR TV control circuit parameters not optimized (common)

First check

Verify switch-on time and overshoot with software settings

Test point: T1 (transition time in quick mode)
Expected: T1 ≦ 400ms in quick mode or ≦ 500ms in normal mode, ≤ specified
Tools: XRGSCOPE software

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

Calibration: Function Unit kV alignment high voltage

Alignment of kV controller Factor Duty Cycle to ensure actual kV value attained within 2ms without kV break-in or overshoot during exposure

Ranked causes

1. Factor Duty Cycle requires alignment after FRU replacement (common)

First check

Warm up tube before starting alignment

Test point: Tube heating status
Expected: Tube warmed up

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

Calibration: Maximum patient entrance dose rate radiation

Entrance Dose rate Limiter (EDL) adjustment to comply with national regulations (e.g., 10R/min = 1.4567mGy/s in USA) by reducing maximum power output

Ranked causes

1. Dose rate exceeds regulatory limit (unknown)

First check

Cover I.I. with lead for protection

Test point: Image intensifier
Expected: Lead covering in place

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

Calibration: Ohmmeter diode test polarity verification

Verify ohmmeter diode test feature polarity configuration before proceeding with converter part measurements

Ranked causes

1. Incorrect meter polarity configuration (rare)

First check

Verify diode test anode polarity

Test point: Ohmmeter diode test mode
Expected: Anode symbol on meter = positive voltage

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

Calibration: PCB kV-power IGBT transistor precaution caution

Before working on IGBT gate connections, take precautions against electrostatic discharge and mobile phone interference.

Ranked causes

1. IGBT gate damage from ESD or RF interference (unknown)

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Contacts welded at breakers and contactors high voltage

Contacts at breakers ENF1, ENF2 or contactor ENK1 are welded together, preventing normal operation

Ranked causes

1. Contacts welded at breakers ENF1, ENF2 or contactor ENK1 (occasional)

First check

Switch OFF breakers ENF1 and ENF2

Test point: Breakers ENF1, ENF2
Expected: Both breakers in OFF position

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

Converter chassis cracked or bent caution

Visual inspection reveals cracks visible at white IGBT body through converter cage grid, or kV-power PCB Q100 bent towards cover plate

Ranked causes

1. Physical damage to IGBT body or kV-power PCB Q100 (unknown)

First check

Visual inspection of IGBT body through cage grid

Test point: White IGBT body
Expected: No cracks visible

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

Converter DC discharge time excessive high voltage

DC voltage remains on converter after power-off; discharge time > 11 minutes instead of normal 40 seconds to <60VDC when ENK2 discharging auxiliary contact is open.

Ranked causes

1. ENK2 main contactor contact welded (occasional)

First check

Measure DC voltage at auxiliary contacts 41-42 of ENK2

Test point: ENK2 auxiliary contacts 41-42
Expected: 0V
Tools: Voltmeter, DC capable

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

Converter visual defects caution

Cracks visible on white IGBT body through converter cage grid or kV-power PCB Q100 bent towards cover plate

Ranked causes

1. Physical damage to IGBT or PCB (common)

First check

Visual inspection of converter for physical damage

Test point: White IGBT body viewed through converter cage grid
Expected: No cracks visible

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Cracks in ceramic resistor bodies caution

Ceramic bodies of damping resistors show visible cracks, requiring spring resoldering.

Ranked causes

1. Thermal or mechanical stress on resistor (unknown)

First check

Inspect ceramic resistor bodies for cracks

Test point: Damping resistors R1, R2, R3 ceramic bodies
Expected: No cracks visible

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Duty cycle factor misalignment caution

Error codes 02HG (warning) or 02HH (error) indicate incorrect duty cycle factor setting

Ranked causes

1. Duty cycle factor out of adjustment (occasional)

First check

Verify filament adaptation

Test point: Filament conditioning and adaptation status
Expected: Filament properly adapted before duty cycle realignment

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

ENF1 and/or ENF2 and/or ENF3 tripped high voltage

One or more emergency fuses have tripped; mains fuses might have additionally tripped after a failure event.

Ranked causes

1. Rotor control unit EY (high speed) or EYA (low speed) failure (common)

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

ENF1, ENF2, or ENF3 fuse tripped high voltage

One or more of the emergency shutdown fuses (ENF1, ENF2, ENF3) have tripped, possibly with mains fuses also tripped, indicating a generator fault condition

Ranked causes

1. Rotor control unit EY (high speed) or EYA (low speed) failure (common)

First check

Verify which fuses have tripped

Test point: ENF1, ENF2, ENF3, mains fuses
Expected: One or more tripped

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Error messages 02HI and 02HJ appear during tube check

Error codes appear because mains lines are disconnected from converters during test

Ranked causes

1. Converter DC voltage out of range due to disconnected mains (common)

First check

Verify mains lines disconnected from converters during tube check

Test point: converter primary power connections
Expected: Mains lines not connected; converter DC = 0V

Fuses tripped, cause undetermined high voltage

ENF1, ENF2, or ENF3 fuses tripped but the specific cause is not the rotor control unit; generator is in fault condition

Ranked causes

1. Unknown fault condition (unknown)

First check

Verify generator is de-energized

Test point: Mains power
Expected: Generator OFF and completely disconnected from mains (room switch or earth leakage breaker open)

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Generator failure with fuses tripped (non-rotor case) high voltage

ENF1, ENF2, and/or ENF3 tripped in cases other than rotor control failure. Generator must remain in this condition for diagnosis.

Ranked causes

1. Unknown failure requiring qualified technician diagnosis (unknown)

First check

Ensure generator is switched OFF

Test point: Main power switch
Expected: OFF position

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

IGBT emitter-collector resistance out of specification caution

IGBT emitter to collector resistance measurements outside nominal range when converter fully assembled

Ranked causes

1. Defective IGBT transistor (common)

First check

IGBT E1 to C1 resistance measurement

Test point: Q100 kV-power PCB E1 to C1
Expected: 21.5 - 22kΩ with ohm setting PLUS/MINUS probe on diode symbol, 21.5 - 22kΩ
Tools: Ohmmeter

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

IGBT gate-emitter resistance out of specification caution

IGBT gate to emitter resistance measurements outside nominal range

Ranked causes

1. Defective IGBT transistor (common)

First check

IGBT G1 to E1 gate-emitter resistance

Test point: Q100 kV-power PCB G1 to E1
Expected: 3.8kΩ ±10%, ±10%
Tools: Ohmmeter

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

kV values not symmetrical high voltage

Oscilloscope measurement shows asymmetric anode and cathode voltage behavior during exposure

Ranked causes

1. HV transformer defective (common)

First check

Measure anode voltage with oscilloscope

Test point: EZ130 X4 AV_AN (anode high voltage), ground EZ130 X6
Expected: Symmetric waveform matching chart

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

kV-driver test high voltage

Functional test of kV-driver subsystem; error codes 02HI and 02HJ expected when mains not connected

Ranked causes

1. kV-driver malfunction or calibration needed (unknown)

First check

Run kV-driver diagnostic test

Test point: Converter control interface
Expected: Test successful or specific error codes

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

kV-power PCB Q100 bent towards cover plate caution

PCB Q100 is bent and in contact with or pressing towards the cover plate

Ranked causes

1. kV-power PCB Q100 deformed (unknown)

First check

Visual inspection of kV-power PCB Q100 alignment

Test point: kV-power PCB Q100 position relative to cover plate
Expected: PCB is not bent and does not contact cover plate

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

mA-control fatal error after test cable connection caution

LED on mA-control EZ119 displays FATAL error condition after test cable with resistor is connected and generator has been running for some time.

Ranked causes

1. Test cable resistor causes mA-control error state (occasional)

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Open springs at damping resistors high voltage

Springs at damping resistors R1, R2, R3 are open; may occur when all breakers are ON at service arrival, indicating prior short-circuit in converter or mains rectifier/filter

Ranked causes

1. Short-circuit in converter or mains rectifier/filter (common)

First check

Visual inspection of springs at damping resistors R1, R2, R3

Test point: R1, R2, R3 springs
Expected: Springs closed, no open connections

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

Overvoltage diode conduction failure caution

Overvoltage protection diodes V500/V501/V502/V503 not conducting at specified voltage or showing incorrect reverse leakage

Ranked causes

1. Defective overvoltage diode (common)

First check

V500 diode cathode to anode forward voltage test

Test point: V500 cathode (heat sink plate) to anode
Expected: 310mV ±10%, ±10%
Tools: Diode test meter

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

Power cable harness connector overheating caution

Connectors at resonance capacitors C3:2 and C13:2 show signs of thermal degradation or abnormal appearance

Ranked causes

1. Corroded or thermally damaged connector (occasional)

First check

Visual inspection of connector at C3:2

Test point: Resonance capacitor C3:2 connector
Expected: Connector appearance (2): normal with no thermal damage

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

Primary current measurement out of specification high voltage

Oscilloscope waveform of primary current does not match expected range during 40kV, 50mA, 10ms generator operation

Ranked causes

1. HV transformer asymmetrical waveform (Optimus 65/80) (occasional)

First check

Turn off generator and discharge converter DC

Test point: Generator power
Expected: Generator off, wait 1 minute

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

Rectifier diode fault check

Testing rectifier diodes for opens or shorts using ohmmeter diode test feature

Ranked causes

1. Rectifier diode failure (unknown)

First check

Rectifier diode test with ohmmeter diode function

Test point: L1 to minus terminal
Expected: 450mV ±10% in forward direction, ±10%
Tools: Ohmmeter with diode test feature

1 more check with pass and fail actions are in ServiceForge. Connect ServiceForge to your AI

Rectifier diode malfunction high voltage

Mains rectifier diodes in EQV5 not conducting or blocking as expected, measured via ohmmeter diode test mode

Ranked causes

1. Rectifier diode forward/reverse resistance out of tolerance (unknown)

First check

Verify ohmmeter polarity for diode test

Test point: Meter anode/cathode symbols
Expected: Anode symbol = positive (PLUS), cathode symbol = negative (MINUS)

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

Rectifier failure high voltage

Mains rectifier diodes not conducting or conducting incorrectly at specified test points

Ranked causes

1. Defective rectifier diode (common)

First check

Diode test on L1 to minus terminal

Test point: L1 / – on Rectifier EQV5
Expected: 450mV ±10% with PLUS probe on diode symbol
Tools: Ohmmeter with diode test feature

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

Resistor group out of specification caution

Parallel resistor groups R506/507/508 or R509/510/511 not meeting combined or individual resistance values

Ranked causes

1. Defective or out-of-tolerance resistor in group (occasional)

First check

Measure R506/507/508 group total resistance

Test point: R506/507/508 parallel combination
Expected: 39Ω ±5%, ±5%
Tools: Ohmmeter

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

Resonance capacitor short or open circuit caution

Resonance capacitors C3:1 or C13:1 not functioning correctly; ohmmeter shows short-circuit or open connection

Ranked causes

1. Defective resonance capacitor (short or open) (occasional)

First check

Disconnect primary lines from C3:1 and C13:1

Test point: Resonance capacitors C3:1 and C13:1
Expected: Primary connections removed for testing

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

Short-circuit in converter or mains rectifier/filter high voltage

Electrical short-circuit detected in converter or its mains rectifier/filter circuit

Ranked causes

1. Component failure or insulation breakdown in converter or rectifier/filter (unknown)

First check

Switch OFF all breakers

Test point: ENF1, ENF2 breakers
Expected: All breakers OFF

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

Short-circuit on converter mains lines high voltage

Converter mains lines show short-circuit resistance when measured between phases.

Ranked causes

1. Damaged mains rectifier/filter circuit or converter wiring fault (occasional)

First check

Remove converter mains lines from contactor ENK1

Test point: Contactor ENK1 terminals :1, :3, :5
Expected: Mains lines disconnected

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

Tube arcing detected patient safety

Oscilloscope shows kV break-in (dropout) within less than 10 microseconds during exposure

Ranked causes

1. Tube age or conditioning issue (occasional)

First check

Monitor oscilloscope trace for kV dropout during exposure

Test point: EZ130 X4 (anode) or EZ130 X5 (cathode) with oscilloscope
Expected: Stable kV waveform with no break-in

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Tube arcing during kV adjustment patient safety

Tube arcing occurs during alignment exposure setting

Ranked causes

1. Tube not sufficiently warmed up (common)

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

Tube braking does not occur after generator shutdown

Anode does not automatically brake or brakes incorrectly after switching off generator with PREP engaged

Ranked causes

1. Rotor control system malfunction (high-speed mode) (unknown)

First check

Verify tube braking after generator shutdown

Test point: Tube anode rotation
Expected: Automatic braking (high-speed control) or manual braking via PREP release (low-speed control)

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Tube does not adapt after reconditioning high voltage

Tube remains defective and cannot be conditioned through the standard procedure even after multiple attempts

Ranked causes

1. Tube failure; reconditioning unsuccessful after three attempts (rare)

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Tube does not brake after mains breaker trip caution

Anode disk continues rotating at high speed after mains power loss during rotation; CPU does not complete brake sequence

Ranked causes

1. Brake sequence interrupted by mains loss during rotor operation (common)

First check

Observe rotor behavior during generator start-up

Test point: tube housing
Expected: Anode disk decelerates and stops within 40 seconds of power-ON

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Tube does not brake after mains power loss patient safety

Anode disk continues rotating when mains breakers are tripped; CPU does not complete brake process

Ranked causes

1. Mains breaker tripped while tube rotating (high-speed rotor control) (common)

First check

Verify anode disk rotation status before power-ON

Test point: Tube housing
Expected: Anode disk not rotating

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Visible cracks on converter IGBT body caution

Cracks visible on the white IGBT body when looking through the converter cage grid

Ranked causes

1. IGBT body damaged (unknown)

First check

Visual inspection of IGBT body

Test point: White IGBT body viewed through converter cage grid
Expected: No cracks visible

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Waveform (1) shows lower amplitude or different kV behavior than (2) and (3) high voltage

Converter test waveform analysis shows (1) has reduced amplitude or abnormal kV behavior compared to reference waveforms (2) and (3)

Ranked causes

1. X-ray tube defective (common)

First check

Compare waveform (1) amplitude and kV behavior to waveforms (2) and (3)

Test point: Converter test waveforms (1), (2), (3)
Expected: Waveforms (1) and (2) should look almost the same with symmetry and amplitude

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Waveform (3) discharge ramp slower than expected high voltage

Converter test waveform (3) shows slower discharging ramp compared to normal, indicating possible cable capacitance issue

Ranked causes

1. HV cable capacitance present or incorrect cable installed (occasional)

First check

Measure discharging ramp steepness of waveform (3)

Test point: Converter test waveform (3)
Expected: Steeper (faster) discharging ramp; tank 3 nF, 20 m cable typically 1.5 nF

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Waveform (3) shows asymmetric amplitude high voltage

Converter test waveform (3) displays asymmetric amplitude pattern

Ranked causes

1. HV tank defective (common)

First check

Observe waveform (3) for amplitude symmetry

Test point: Converter test waveform (3)
Expected: Waveform (3) should show symmetric amplitude (steeper discharging ramp than (1) and (2))

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Waveforms (2) and (3) differ in amplitude and symmetry; (3) is symmetric high voltage

Converter test shows waveforms (2) and (3) have different amplitude and symmetry, with (3) appearing symmetric

Ranked causes

1. HV cable(s) defective (common)

First check

Compare waveforms (2) and (3) for amplitude and symmetry differences

Test point: Converter test waveforms (2) and (3)
Expected: Waveforms (2) and (3) should match in amplitude and symmetry

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

More symptoms

Welded contacts at breakers and contactors
X-ray tube shows visible damage
X-ray tube visible damage assessment

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

Error codes

Code	Meaning	Trigger	Severity
`02HG`	Duty cycle factor misalignment warning in background	Duty cycle factor out of adjustment	warning
`02HH`	Duty cycle factor misalignment error	Duty cycle factor out of adjustment	error
`02HI`	Converter DC voltage out of range (0V)	Mains lines not connected to converter during test	warning
`02HJ`	Converter DC voltage out of range (0V)	Mains lines not connected to converter during test	warning
`02HW`	Asymmetry warning in background	kV anode and cathode values are not symmetrical	warning
`02HX`	Asymmetry error	kV anode and cathode values are not symmetrical	error
`02WG`	Tube arcing warning in background	kV break-in detected within < 10µs during exposure	warning
`02WH`	Tube arcing error	kV break-in detected within < 10µs during exposure	error

Likely causes and actions for each code are in ServiceForge. Connect ServiceForge to your AI

Community

0 fixes logged by technicians through their AI, with outcomes, for this model.

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