X-ray units · MinXray family

MinXray HF120.60HPPWV PowerPlus: troubleshooting and error codes

The ServiceForge knowledge base holds 36 documented symptoms for the MinXray HF120.60HPPWV PowerPlus, with 53 ranked causes, 80 diagnostic checks with test points and expected values, and 0 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

Indicator lamps not lit when power on

Indicator lamps do not illuminate when power switch is in ON position

Ranked causes

1. Wall socket has bad connection (common)
2. Power cord is defective (common)
3. Fuse F1 is blown (common)
4. Inverter PCB is defective (occasional)
5. Power supply module is defective (occasional)

First check

Verify wall socket electrical connection

Test point: wall socket
Expected: proper connection and voltage present

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

Error lamp lit and no X-ray radiation

Error lamp illuminates or blinks and unit produces no X-ray output

Ranked causes

1. Exposure switch released during exposure (common)
2. OVC circuit activated or inverter PCB defective (occasional)
3. X-ray lamp timing issue (rare)
4. Inverter protection circuit activated (occasional)

First check

Set timer to 0.2 sec and perform X-ray exposure test

Test point: X-ray output
Expected: X-ray films, fluorescent screen, or test equipment shows X-ray generation

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

No X-ray and error lamp not lit radiation

Unit produces no X-ray output and error lamp does not illuminate

Ranked causes

1. AC power too weak (common)
2. Exposure switch or cord defective (common)
3. Internal harness or Inverter PCB M2300 defective (occasional)
4. Inverter PCB M9171A or M9152D defective (occasional)

First check

Confirm Line voltage indicator lamp is lit

Test point: Line voltage indicator lamp
Expected: Lamp lit

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

Error lamp lit and no X-ray output radiation

Error lamp illuminates and unit produces no X-ray or only brief X-ray pulses

Ranked causes

1. Exposure switch released during exposure (common)
2. OVC circuit activated (occasional)
3. Inverter protection circuit activated (occasional)

First check

Set timer to ~0.2sec and perform actual X-ray exposure test

Test point: X-ray output
Expected: X-ray generated and detectable by film, fluorescent screen or test equipment

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

Indicator lamps not lit when power switch on

All indicator lamps remain dark despite power switch being in ON position; collimator lamp status unknown.

Ranked causes

1. Wall socket bad connection (common)
3. Fuse blown (30A@125V) (common)
5. Power supply defective (occasional)

First check

Verify wall socket connection

Test point: wall outlet
Expected: proper electrical connection, no loose contacts

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

No X-ray output and error lamp not lit radiation

Unit produces no X-ray and error lamp does not illuminate

Ranked causes

1. AC power too weak (common)
2. Exposure switch or cord defective (common)
3. Inverter or internal harness defective (occasional)

First check

Verify Line voltage indicator lamp is lit

Test point: Line voltage indicator lamp
Expected: lamp illuminated

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

Few X-rays generated during exposure radiation

X-ray output stops prematurely before exposure completes

Ranked causes

1. OVC circuit activated prematurely (common)
2. X-ray lamp lighting time longer than normal (occasional)

First check

Verify T, T1, Ep connections are correct

Test point: Connections T, T1, Ep
Expected: All connections secure and correct

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

Calibration: DC power supply voltage (VR3) high voltage

Adjust main DC power supply output voltage to specification on M9171A board

Ranked causes

1. VR3 potentiometer requires adjustment (common)

First check

Measure DC power supply voltage

Test point: 370 (+) to GND (–)
Expected: 368.5 – 372 V, ±1.5 V
Tools: Digital multimeter

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

Calibration: DC12V power supply HP150S-280-12 caution

Verification of DC 12V output from HP150S-280-12 power supply module

Ranked causes

1. Factory calibration already performed (common)

First check

Verify DC 12V output

Test point: HP150S-280-12 output terminals
Expected: DC 12V
Tools: DMM

Calibration: DC12V power supply ZWS30-12 caution

Verification of DC 12V output from ZWS30-12 power supply module

Ranked causes

1. Factory calibration already performed (common)

First check

Verify DC 12V output

Test point: ZWS30-12 output terminals
Expected: DC 12V
Tools: DMM

Calibration: Exposure time radiation

Adjustment of DIP switch SW1 on M2300 board to fine-tune exposure time offset

Ranked causes

1. Exposure time offset calibration required (occasional)

First check

Turn off equipment and remove battery

Test point: Main power and battery
Expected: Equipment powered off, battery removed

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

Calibration: High-frequency inverter FQ1 frequency high voltage

Adjust FQ1 frequency to 80 kHz on M9152D board

Ranked causes

1. VR1 on M9152D requires frequency adjustment (common)

First check

Measure FQ1 frequency

Test point: FQ1 (+) to GND (–)
Expected: 80 kHz
Tools: Frequency counter or oscilloscope

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

Calibration: High-frequency inverter FQ2 frequency high voltage

Confirm FQ2 frequency is 90 kHz on M9152D board

Ranked causes

1. VR2 on M9152D may require frequency adjustment (occasional)

First check

Measure FQ2 frequency

Test point: FQ2 (+) to GND (–)
Expected: 90 kHz
Tools: Frequency counter or oscilloscope

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

Calibration: kV adjustment radiation

Re-adjustment of X-ray tube voltage (kV) output after component replacement or maintenance. Requires oscilloscope measurement of EP waveform and adjustment of VR3 potentiometer on M9152D PCB.

Ranked causes

1. kV output requires re-adjustment after Insert Box or Inverter PC Board replacement (common)

First check

Connect oscilloscope probes and configure

Test point: CH1 to EP, CH2 to IP, GND to GND terminal on M9152D PCB
Expected: CH1: 500mV/div, CH2: 500mV/div, 10msec/div
Tools: Oscilloscope with storage mode

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

Calibration: kV output at 120 kV radiation

Adjustment of VR3 on M9152D board to set X-ray tube output voltage at 120 kV station

Ranked causes

1. Inverter PC Board or Insert Box replacement (occasional)

First check

Set X-ray output to 120 kV

Test point: Equipment control panel
Expected: 0.2 sec., 120 kV

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

Calibration: kV output at 80 kV radiation

Adjustment of VR3 on M9152D board to set X-ray tube output voltage at 80 kV station

Ranked causes

1. Inverter PC Board or Insert Box replacement (occasional)

First check

Connect oscilloscope probes

Test point: M9152D PC Board EP, IP, GND terminals
Expected: CH1 to EP, CH2 to IP, GND to ground

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

Calibration: Low line voltage indicator caution

Adjustment of VR1 on M2302B PC Board to set low line voltage indicator threshold

Ranked causes

1. Factory calibration required after assembly (common)

First check

Set input voltage to 100VAC

Test point: Input AC supply
Expected: 100VAC

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

Calibration: M9152D PC Board frequency and pre-heat adjustments high voltage

Factory-preset board requires adjustment of inverter frequency and three separate pre-heat voltage levels dependent on operating voltage range.

Ranked causes

1. M9152D board frequency and pre-heat parameters out of specification (common)

First check

Measure FQ1 frequency

Test point: FQ1 (+) and GND (–)
Expected: 80 kHz

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

Calibration: M9171A PC Board voltage adjustments high voltage

Factory-preset board requires voltage adjustment across three protection circuits to maintain proper operation: DC370V rail, Over Current Protection, and Over Voltage Protection.

Ranked causes

1. M9171A board voltage parameters out of specification (common)

First check

Measure DC370V rail voltage

Test point: 370 (+) and GND (–)
Expected: 368.5–372 V, ±3.5 V

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

Calibration: mA output at 120 kV radiation

Adjustment of VR4 on M9152D board to verify X-ray tube current at 120 kV yields 20 mA

Ranked causes

1. Inverter PC Board or Insert Box replacement (occasional)

First check

Set X-ray output to 120 kV

Test point: Equipment control panel
Expected: 120 kV setting

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

Calibration: mA output at 40 kV radiation

Adjustment of VR4 on M9152D board to verify X-ray tube current at 40 kV yields 60 mA

Ranked causes

1. Inverter PC Board or Insert Box replacement (occasional)

First check

Set X-ray output to 40 kV

Test point: Equipment control panel
Expected: 40 kV setting

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

Calibration: mA output at 60 kV radiation

Adjustment of VR4 on M9152D board to set X-ray tube current at 60 kV

Ranked causes

1. Inverter PC Board or Insert Box replacement (occasional)

First check

Set X-ray output to 60 kV

Test point: Equipment control panel
Expected: 0.2 sec., 60 kV

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

Calibration: Over-current protection circuit (VR2) high voltage

Adjust over-current protection threshold voltage on M9171A board

Ranked causes

1. VR2 potentiometer requires adjustment (common)

First check

Measure over-current protection threshold

Test point: OCP (+) to GND (–)
Expected: 2.29 – 2.31 V, ±0.01 V
Tools: Digital multimeter

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

Calibration: Over-voltage protection circuit (VR1) high voltage

Adjust over-voltage protection threshold voltage on M9171A board

Ranked causes

1. VR1 potentiometer requires adjustment (common)

First check

Measure over-voltage protection threshold

Test point: OVP (+) to GND (–)
Expected: 1.49 – 1.51 V, ±0.01 V
Tools: Digital multimeter

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

Calibration: Pre-heat adjustment 52 to 80 kV (VR6) high voltage

Adjust pre-heat voltage for 52–80 kV operation on M9152D board

Ranked causes

1. VR6 potentiometer requires adjustment for 52–80 kV operation (common)

First check

Measure pre-heat voltage for 52–80 kV

Test point: PRE (+) to GND (–)
Expected: 0.569 V, ±0.001 V
Tools: Digital multimeter

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

Calibration: Pre-heat adjustment over 82 kV (VR7) high voltage

Adjust pre-heat voltage for operation above 82 kV on M9152D board

Ranked causes

1. VR7 potentiometer requires adjustment for >82 kV operation (common)

First check

Measure pre-heat voltage for >82 kV

Test point: PRE (+) to GND (–)
Expected: 0.541 V, ±0.001 V
Tools: Digital multimeter

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

Calibration: Pre-heat adjustment under 50 kV (VR5) high voltage

Adjust pre-heat voltage for operation below 50 kV on M9152D board

Ranked causes

1. VR5 potentiometer requires adjustment for <50 kV operation (common)

First check

Measure pre-heat voltage for <50 kV

Test point: PRE (+) to GND (–)
Expected: 0.629 V, ±0.001 V
Tools: Digital multimeter

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

Calibration: Pre-heat voltage L at 40 kV radiation

Adjustment of VR5 on M9152D board to set filament pre-heat voltage for 40-50 kV range

Ranked causes

1. Inverter PC Board or Insert Box replacement (occasional)

First check

Set X-ray output to 40 kV

Test point: Equipment control panel
Expected: 0.2 sec., 40 kV

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

Calibration: Pre-heat voltage M at 80 kV radiation

Adjustment of VR6 on M9152D board to set filament pre-heat voltage for 52-80 kV range

Ranked causes

1. Inverter PC Board or Insert Box replacement (occasional)

First check

Set X-ray output to 80 kV

Test point: Equipment control panel
Expected: 80 kV setting

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

Calibration: Pre-heat voltage S at 100 kV radiation

Adjustment of VR7 on M9152D board to set filament pre-heat voltage for 82-120 kV range

Ranked causes

1. Inverter PC Board or Insert Box replacement (occasional)

First check

Set X-ray output to 100 kV

Test point: Equipment control panel
Expected: 100 kV setting

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

Calibration: Tube current feedback VR4 (IP SET) high voltage

Set VR4 (IP SET) to center position for tube current feedback on M9152D board

Ranked causes

1. VR4 potentiometer requires centering (common)

First check

Position VR4 (IP SET) potentiometer

Test point: VR4 mechanical position
Expected: Center position

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

Calibration: Tube potential feedback VR3 (EP SET) high voltage

Set VR3 (EP SET) to center position for tube potential feedback on M9152D board

Ranked causes

1. VR3 potentiometer requires centering (common)

First check

Position VR3 (EP SET) potentiometer

Test point: VR3 mechanical position
Expected: Center position

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

Confirmation measurement after kV adjustment radiation

Required verification using direct x-ray measuring equipment (VICTOREEN NERO) to confirm calibration accuracy after VR3 adjustment.

Ranked causes

1. Calibration verification required to ensure accuracy (common)

First check

Perform direct kV measurement at 100 kV station

Test point: X-ray tube output
Expected: 97.5 to 99 kV measured, 97.5 to 99 kV
Tools: VICTOREEN NERO or equivalent non-invasive x-ray measuring equipment

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

Error lamp blinking

Error lamp blinks when exposure switch released during X-ray generation. System stops exposure and indicates error condition.

Ranked causes

1. Exposure switch released during X-ray exposure (common)

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

Error lamp on continuously

Error lamp remains on after exposure switch released, indicating unit malfunction. System cannot generate X-ray when error lamp is lit.

Ranked causes

1. Unit malfunction (unknown)

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

Leakage radiation measurement and calculation radiation

Measure leakage radiation at 1 m distance and calculate dose rate in mR/h

Ranked causes

1. Verification of leakage radiation compliance (common)

First check

Measure raw radiation dose at 1 m distance

Test point: Dosemeter chamber positioned per top/side view diagram
Expected: Value in mR (varies by chamber position; sample data 0.004–0.048 mR)
Tools: Model 37D Portable X-ray dosemeter, tape measure, radiation survey chamber

1 more check with pass and fail actions, 1 corrective action, and part numbers 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.