X-ray systems

Philips CRX-400/200i: troubleshooting and error codes

The ServiceForge knowledge base holds 9 documented symptoms for the Philips CRX-400/200i, with 12 ranked causes, 23 diagnostic checks with test points and expected values, and 6 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

Calibration: Inverter selection and temperature management

System must select appropriate inverters based on temperature and current demand to optimize exposure capability

Ranked causes

1. Inverter selection defaults applied when temperatures equal (common)
2. Need to disable specific inverter (occasional)
3. Temperature should not affect inverter selection (rare)

First check

Verify inverter temperatures before exposure

Test point: XSC+ system status
Expected: Real-time inverter temperature values

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

Inverter status verification

Query system to confirm which inverters were selected and used during exposure

Ranked causes

1. Need to verify inverter usage in real-time (occasional)
2. Need to verify inverter selection from previous exposure (occasional)

First check

Issue 'xe' command in 'iqout' during active exposure

Test point: Command line interface
Expected: HVGSys8 register displays real-time inverter status

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

Calibration: X-ray tube centering radiation

Film shows dark narrow band off-center in larger band; tube position requires adjustment for proper alignment

Ranked causes

1. X-ray tube misaligned (unknown)

First check

Obtain matrix film or 8x10 cardboard cassette (part 83778) or Polaroid Type 52 (part 259224)

Test point: Cassette slot
Expected: Matrix film with no screen material loaded

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

Inspect HSS wiring configuration for fan connectors

Verify presence of J17 and J18 fan connectors in newer HSS wiring configuration

Ranked causes

1. Confirm proper wiring configuration for cooling fan support (occasional)

First check

Visually inspect for J17 fan connector

Test point: HSS wiring harness J17 location
Expected: J17 FAN connector present on newer HSS configuration

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

Inverter configuration not reset after troubleshooting

Inverters left in troubleshooting mode instead of normal operation configuration

Ranked causes

1. Troubleshooting jumpers not returned to normal configuration (common)

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

Perform No Load Test radiation

Test rotor motor performance without X-Ray Tube connected to verify start current, run current, brake current, and frequency parameters

Ranked causes

1. Verification of rotor motor operation parameters (common)

First check

Measure start current and frequency

Test point: rotor common (white wire)
Expected: 8.5A / 180Hz or 20A / 180Hz depending on tube type

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

Rail voltage out of specification high voltage

DC rail voltage not approximately equal to line voltage × 1.414 or AC component exceeds limits

Ranked causes

1. Inverter malfunction or incorrect configuration (unknown)

First check

Measure DC rail voltage in standby

Test point: Rail voltage measurement point
Expected: Approximately 680 VDC (when line voltage is 480 VAC)

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

Rotor current or frequency out of specification high voltage

Rotor current or frequency during start, run, or brake phase does not match expected values for the tube type

Ranked causes

1. Incorrect rotor winding connections or stator resistance out of range (unknown)

First check

Monitor rotor current and frequency using xe command in iqout

Test point: Rotor common (white wire)
Expected: Start: 8.5A/180Hz or 20A/180Hz; Run: 2.0A/180Hz or 5.25A/180Hz; Brake: 10.0A/20Hz or 12.5A/15Hz

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

Verify X-Ray Tube Stator Resistance radiation

Measure stator winding resistance between specific wire pairs to confirm tube integrity and winding continuity

Ranked causes

1. Validate tube stator winding integrity and continuity (common)

First check

Measure run stator resistance (blk-wht)

Test point: X-Ray Tube stator blk-wht leads
Expected: 12.7/14.1 ohms (Non-Q tubes) or 5.7/6.9 ohms (Bal-Q tubes) or 138/142 ohms (CTR-1447RC only)
Tools: Ohmmeter or DMM resistance setting

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

Error codes

Code	Meaning	Trigger	Severity
`FAULT`	Forward drive / Bias / Overcurrent / Test fault	Forward drive, bias, overcurrent or test fault condition	error
`HVBUS`	High Voltage Bus indicator	H.V. Bus is greater than 400 VDC	info
`OVFLT`	Over-current fault on power rails	Current on rails exceeds 50 amperes	critical
`PWRON`	Low voltage supply active indicator	Low voltage supplies (+20V and +15V) are powered	info
`RCONT`	High Voltage Contactor energized indicator	High Voltage Contactor is energized	info
`ROTON`	Rotor on signal active indicator	Rotor on signal is active	info

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.