X-ray systems · BuckyDiagnost family

Philips BuckyDiagnost: troubleshooting and error codes

The ServiceForge knowledge base holds 82 documented symptoms for the Philips BuckyDiagnost, with 136 ranked causes, 148 diagnostic checks with test points and expected values, and 112 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

Unit does not power on high voltage

Yellow LED on EN 100 is off, relay EN K2 does not switch over

Ranked causes

1. Mains supply failure (common)
2. Circuit breaker EN F1 not released (common)
3. Circuit breaker EN F2 not released (common)
4. Low-voltage supply failure (occasional)
5. Filament circuit failure (occasional)
6. Tube extension failure (occasional)
7. Rotor control failure (occasional)
8. External current consumer issue (occasional)
9. EN 100 board failure (rare)
10. Emergency-OFF circuit open (occasional)
11. Operating desk not connected (occasional)
12. Safety circuit open (occasional)

First check

Verify mains supply present

Test point: System input
Expected: Mains voltage present

5 more checks with pass and fail actions, 12 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Generator selftest fails

Red LED on Z rack is ON continuously; Central Unit, Voltage Control, Current Control, Basic Interface, or Rotor Control module not responding

Ranked causes

1. Central Unit EZ139 fails (occasional)
2. Voltage Control EZ130 fails (occasional)
3. Current Control EZ119 fails (occasional)
4. Basic Interface EZ150 fails (occasional)
5. Rotor Control EY fails (occasional)

First check

Verify Central Unit EZ139 CAN communication

Test point: EZ139 module
Expected: CAN communication established

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

Generator selftest fails with red LED continuously ON high voltage

During power-on, one red LED on Z rack should flash briefly; continuous red LED indicates selftest failure

Ranked causes

1. Central unit EZ139 fails (unknown)
2. Voltage control EZ130 fails (unknown)
3. Current control EZ119 fails (unknown)
4. Basic interface EZ150 fails (unknown)
5. Rotor control EY fails (unknown)

First check

Observe status LEDs on Z rack during startup

Test point: Z rack status LEDs
Expected: All LEDs flash, then one red LED flashes briefly

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

System does not power on high voltage

Yellow LED on EN 100 does not illuminate; system fails to start selftest sequence

Ranked causes

1. Mains supply failure (common)
2. Circuit breaker failure (common)
3. Low-voltage supply failure (occasional)
4. Safety circuit open (occasional)
5. Emergency-OFF circuit open (occasional)

First check

Verify mains power supply

Test point: System mains input
Expected: Mains voltage present

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

Tomography run fails radiation

Tomography procedure does not complete successfully; system may not execute the programmed tomography sequence

Ranked causes

1. Ceiling Suspension (CS) assembly malfunction (unknown)
2. CS longitudinal Drive failure (unknown)
3. CS alpha Drive failure (unknown)
4. Table tomo Assemblies malfunction (unknown)
5. Tomo Controller failure (unknown)

First check

Verify tomography run using VT100 program on service PC

Test point: Service PC display
Expected: All steps during tomography run are visible in VT100 output
Tools: Service PC, VT100 program

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

Calibration: Bucky unit programming and cassette sizing

Setup and verification of bucky controller settings, display units, receptor offsets, and cassette size calibration via XSCOPE software

Ranked causes

1. Incorrect display unit setting (metric/imperial mismatch) (common)
2. Receptor offset out of specification (common)
3. Cassette size settings mismatch (common)
4. Cassette sizing calibration not performed after new bucky installation (occasional)

First check

Verify VA2-board display unit setting

Test point: VA2-board switch
Expected: Set to inch or metric

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

Calibration: Bucky unit cassette sizing radiation

Ensure cassette size display and positioning are correct after bucky installation or when cassette size detection fails

Ranked causes

1. Damaged cassettes or incorrect cassette size display (common)
2. Incorrect bucky unit programming or settings (common)
3. Analogue outputs not correct for inserted cassettes (occasional)

First check

Inspect cassette condition and display

Test point: Control handle display
Expected: Correct cassette format displayed; no physical damage to cassettes

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

Calibration: Cassette sizing and positioning

Verify bucky cassette detection, size display, and positioning tolerance after installation or programming changes

Ranked causes

1. Cassette not detected or incorrect size displayed (common)
2. Incorrect programming or offset settings (common)
3. Cassette positioning outside acceptable tolerance (occasional)

First check

Insert cassette centered and verify size display

Test point: control handle display
Expected: correct format

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

Ceiling suspension does not track table or wallstand movement

Ceiling suspension fails to follow bucky table or wallstand position changes; SID not displayed correctly on control handle

Ranked causes

1. SID sensor voltage supply missing or faulty (common)
2. SID sensor current output zero or at maximum (common)
3. Height sensor electronic part defective (occasional)

First check

Verify 24V supply presence

Test point: UE2 X1:10 via UZ X21:10/X22:1
Expected: 24VDC
Tools: Voltmeter

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

Selftest fails on BuckyDiagnost system high voltage

System does not complete selftest sequence; red/yellow/green LEDs indicate incomplete initialization during power-on

Ranked causes

1. CAN bus power supply 15V missing or insufficient (common)
2. CAN bus cable disconnected or wires damaged (common)
3. SZ1 board power supply 5V or 24V fails (occasional)

First check

Measure 15V CAN bus power supply

Test point: SZ1 X2:9 and EZ X43:9 to GND
Expected: 15V

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

Tracking function not working

Ceiling suspension does not follow table or wallstand movement; SID display may not update correctly on control handle.

Ranked causes

1. Table height sensor malfunction or cable fault (common)
2. Wallstand height sensor malfunction or cable fault (common)
3. Ceiling suspension height sensor malfunction or cable fault (common)

First check

Measure table height sensor current

Test point: SZ1 X4
Expected: 5–18 mA (5 mA at lowest position, 18 mA at uppermost), 5–18 mA range
Tools: Service PC with VT100, analog display

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

Wallstand height tracking not functioning

Ceiling suspension fails to track wallstand bucky up/down movement; height sensor output suspect

Ranked causes

1. Wallstand height sensor current output zero or shorted (common)
2. Wallstand height sensor cable damaged (occasional)
3. Control board VN1 defective or disconnected (occasional)

First check

Measure wallstand height sensor current

Test point: SZ1 X5 at VN1
Expected: 5–18 mA (5 mA at lowest, 18 mA at uppermost), 5–18 mA
Tools: Current meter or service PC with VT100

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

Bucky carriage and cassette selftest fails caution

Bucky carriage does not move to tomo centre position; cassette carriage does not move to both sides and center position; tomography blocked after 2 test runs

Ranked causes

1. Bucky or cassette carriage movement restricted (common)
2. Special circuit failure (occasional)

First check

Verify bucky carriage movement

Test point: Bucky carriage
Expected: Moves freely to tomo centre position

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

Bucky/Tomo unit selftest fails patient safety

Bucky carriage does not move to tomo centre position or cassette carriage fails to move side-to-side and centre

Ranked causes

1. Restricted movement of tray (common)
2. Special circuit failure (occasional)

First check

Inspect bucky carriage and cassette carriage for obstructions

Test point: Carriage movement paths
Expected: Free movement, no mechanical obstruction

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

Cassette format not displayed after tray insertion

Control handle display does not show format when cassette is inserted and tray pulled out slightly

Ranked causes

1. Cassette present switch malfunction (common)
2. Horizontal encoder plate misaligned (occasional)

First check

Insert cassette and pull tray out 1.5-2.5 mm, observe display

Test point: Control handle display
Expected: Format still displayed

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

Cassette tray levers bent or stiff caution

Levers on cassette tray are visibly bent or do not move easily and smoothly

Ranked causes

1. Levers mechanically damaged or misaligned (common)
2. Loose screws causing stiffness (occasional)

First check

Visually inspect cassette tray levers for bending

Test point: Cassette tray levers
Expected: not bent

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

Control desk displays failure during selftest

Control desk C fails to display normal startup sequence; displays error instead

Ranked causes

1. Mains supply failure (common)
2. Circuit breaker failure (common)

First check

Verify mains power to control desk

Test point: Control desk power input
Expected: Mains voltage present

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

Control desk selftest fails

Control desk displays a failure message; main display does not indicate selftest running or displays are not illuminated

Ranked causes

1. Mains supply failure (common)
2. Circuit breaker tripped (common)

First check

Verify mains supply to control desk

Test point: Control desk power input
Expected: Mains voltage present

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

Encoder signal levels out of specification

Measured voltage or track signals do not meet expected values for cassette size and position.

Ranked causes

1. Cassette positioned incorrectly or incompletely (common)
2. Encoder disk or plate misalignment (occasional)

First check

Measure voltage at VA2 X2:5/6

Test point: VA2 X2:5/6
Expected: Within ±0.3V of table value for cassette size, ±0.3V

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

Selftest fails on BuckyDiagnost CS Tomo Unit

LEDs on drive boards indicate selftest running but does not complete successfully

Ranked causes

1. CAN bus failure (common)
2. CAN bus wiring disconnected or damaged (occasional)

First check

Measure 15V power supply voltage on CAN bus

Test point: SZ1 X2:9 and EZ X43:9 to GND
Expected: 15V

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

Selftest fails on BuckyDiagnost TH2

Red LED 1 indicates selftest in progress but does not complete; system does not reach ready state

Ranked causes

1. Power supply 5V or 24V fails (common)
2. SZ1 board failure (occasional)

First check

Measure power supply voltages on SZ1 board

Test point: SZ1 board X6 (24V) and internal 5V rail
Expected: 24V ±tolerance; 5V ±tolerance

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

Sensor track output voltage below threshold

Sensor track voltage does not reach required high level when 43 cm cassette is inserted in vertical and horizontal directions

Ranked causes

1. Sensor malfunction (common)
2. Incorrect distance between sensor and encoder plate (occasional)

First check

Measure voltage on every track of every sensor with largest 43 cm cassette

Test point: X20/X21/X22 pins 3,4,5,6 (pink, white, grey, brown) to Gnd
Expected: All 4 tracks are "H", high-level >13.0 V, >13.0 V
Tools: Voltmeter

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

Table height tracking not functioning

Ceiling suspension does not follow table up/down movement; SID not displayed on control handle

Ranked causes

1. Height sensor current output zero (common)
2. Height sensor stuck at maximum current (occasional)

First check

Measure table height sensor current

Test point: SZ1 X4
Expected: 5–18 mA (5 mA at lowest, 18 mA at uppermost), 5–18 mA
Tools: Current meter or service PC with VT100

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

Wallstand height potentiometer misaligned or disengaged caution

Wallstand bucky position not accurately tracked; potentiometer has lost engagement with toothed belt or is stuck

Ranked causes

1. Height potentiometer disengaged from toothed belt (occasional)
2. Height potentiometer mechanical wear or internal stop interference (rare)

First check

Verify potentiometer engagement during full range motion

Test point: Bucky frame toothed belt and potentiometer assembly
Expected: Potentiometer moves smoothly and is engaged throughout full up/down range

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

Bucky controller board malfunction

SZ1 board fails to initialize properly; W2 battery switch may not be in ON position on replacement board

Ranked causes

1. W2 battery switch not set to ON on replacement SZ1 board (occasional)

First check

Inspect W2 battery switch on replacement SZ1 board

Test point: W2 switch on SZ1 board
Expected: W2 in ON position before board installation

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

BuckyDiagnost TH2 selftest LED sequence incomplete high voltage

Red LED 1 does not turn off after selftest completes; yellow LED 2 does not flash; green LED 3 does not turn on

Ranked causes

1. SZ1 board 5V or 24V power supply failure (common)

First check

Measure 5V and 24V supplies on SZ1 board with oscillograph

Test point: SZ1 X6 power connector
Expected: 5V stable and 24V stable with no ripple

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

Calibration: Bucky exposure delay radiation

Set exposure delay between grid magnet dropout and X-ray release to prevent coincidence with grid reversal point during short-time exposures. Involves measuring delay time and performing test exposures.

Ranked causes

1. Exposure delay requires adjustment for different generator types (common)

First check

Measure delay time with oscilloscope

Test point: VA1 K2:3 and K2:4
Expected: 120ms to 150ms after grid magnet dropout (varies by generator type)
Tools: Oscilloscope

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

Calibration: Bucky exposure delay time radiation

Exposure must occur 120–150 ms after grid magnet dropout to prevent coincidence with grid reversal point during short-time exposures. Adjustment via potentiometer VA1 P1; verification by oscilloscope measurement and test film exposures.

Ranked causes

1. Delay time requires adjustment per generator type (common)

First check

Measure delay time with oscilloscope

Test point: VA1–K2:3 and K2:4
Expected: Between 21 (XGRDEX) and 20 (RQXGEX) signals
Tools: Oscilloscope

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

Calibration: cassette present switch adjustment

Spring plate movement verification when cassette tray is inserted

Ranked causes

1. Spring plate out of adjustment (unknown)

First check

Measure spring plate movement when cassette tray is inserted

Test point: spring plate
Expected: 0.8 ... 1.2 mm, 0.8 to 1.2 mm

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

Calibration: Cassette sizing and offset

Verify bucky unit cassette detection, size display, and receptor offset settings match actual cassette dimensions and positioning after installation or recalibration.

Ranked causes

1. Incorrect cassette size displayed or offset not calibrated (common)

First check

Inspect cassettes for damage

Test point: Physical cassette examination
Expected: Cassettes undamaged and in working condition

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

Calibration: exposure delay time radiation

Exposure must occur 120–150 ms after grid magnet dropout to prevent release coinciding with grid reversal during short exposures. Adjustment required due to different generator delay times.

Ranked causes

1. Generator-dependent exposure delay time variance (common)

First check

Measure delay time between XGRDEX and RQXGEX signals with oscilloscope

Test point: VA1–K2:3 and K2:4
Expected: 120–150 ms after grid magnet dropout
Tools: Oscilloscope

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

Calibration: Horizontal encoder plate distance adjustment caution

Distance between horizontal encoder plate and sensor must be set to specification using leveling shims

Ranked causes

1. Encoder plate distance out of specification (unknown)

First check

Measure distance between horizontal encoder plate and sensor

Test point: horizontal encoder plate to sensor
Expected: 1.0 mm ± 0.5 mm, ±0.5 mm

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

Calibration: Template alignment for 5" x 7" cassette

Test procedure to verify proper template centering and alignment for 5" x 7" cassette size in Bucky unit

Ranked causes

1. Template misalignment or incorrect positioning (unknown)

First check

Insert template for 5" x 7" cassette size and verify centering

Test point: Template alignment mark
Expected: Template centered with respect to mark

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

Calibration: Template alignment for 9.5" x 9.5" cassette

Test procedure to verify proper template centering and alignment for 9.5" x 9.5" cassette size in Bucky unit

Ranked causes

1. Template misalignment or incorrect positioning (unknown)

First check

Insert template for 9.5" x 9.5" cassette size and verify centering

Test point: Template alignment mark
Expected: Template centered with respect to mark

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

Calibration: Tomo center position switch

Position the ceiling suspension at system center and adjust the switching cam to touch only the respective switch

Ranked causes

1. Switch plate requires positioning with respect to switching cam (common)

First check

Position ceiling suspension at system center

Test point: Catch pins and catch plates
Expected: Pins lock into catch plates

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

Calibration: Tomo drive centering caution

Verify toothed belt runs parallel to rails along full longitudinal range; adjust motor unit position if necessary

Ranked causes

1. Tomo motor unit misalignment causes belt to run non-parallel to rails (occasional)

First check

Move ceiling suspension through full longitudinal range

Test point: Toothed belt relative to rails 1
Expected: Belt runs parallel to rails throughout movement

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

Calibration: Tomo drive centering check

Verify toothed belt runs parallel to rails across full longitudinal range

Ranked causes

1. Tomo motor unit misaligned in transverse rail (common)

First check

Inspect belt tracking throughout longitudinal range

Test point: Toothed belt and rails 1
Expected: Belt runs parallel to rails

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

Calibration: Tomo force adjustment

Verify and adjust tomo suspension pulling force to specified ranges with and without servo

Ranked causes

1. Toothed belt tension incorrect (common)

First check

Measure pulling force with system OFF

Test point: Control handle
Expected: 30 ... 40N, 30-40N
Tools: Spring balance

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

Calibration: Tomo safety end position switch

Position ceiling suspension at tomo safety end position and adjust switch plate to ensure cam contacts only the respective switch

Ranked causes

1. Switch plate requires positioning to cam at safety end position (common)

First check

Position ceiling suspension at tomo safety end position

Test point: Switch and cam contact
Expected: Switch 1 touches cam 2

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

Calibration: Verify cassette availability before recalibration

Check that cassettes are functional and of correct sizes prior to performing bucky recalibration procedures

Ranked causes

1. Cassettes damaged or bucky not functioning correctly (unknown)

First check

Verify analogue outputs are correct for inserted cassettes

Test point: Bucky analogue outputs
Expected: correct for inserted cassettes

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

Cassette format not displayed during Z-direction movement

Control handle display does not maintain format display when tray is moved in Z-direction with cassette inserted

Ranked causes

1. Horizontal encoder-plate misaligned or damaged (common)

First check

Move tray in Z-direction with cassette inserted and format displayed

Test point: Control handle display
Expected: Format still displayed

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

Cassette size indicator misalignment caution

9.5 inch cassette size lines not visible at top of alignment triangle when levers touch cassette

Ranked causes

1. Levers not properly positioned for 9.5 inch cassette (common)

First check

Insert 9.5 inch cassette with template and observe alignment pattern

Test point: Cassette tray alignment triangles
Expected: The 9.5" lines shall be visible at the top of the triangle when levers touch cassette

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

Cassette size not recognized correctly

System fails to recognize inserted cassette format; test of 10" x 12" cassette size fails

Ranked causes

1. Bumper distance incorrect (common)

First check

Verify bumper spacing distance

Test point: Distance between bumpers
Expected: 144 ... 145 mm, 144-145 mm

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

Cassette size not recognized during insertion

Cassette format is not detected when cassette tray is inserted into bucky frame

Ranked causes

1. Switch point misaligned - cassette size recognition switch not triggering at correct position (common)

First check

Verify cassette present switch is closed

Test point: cassette present switch
Expected: closed

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

Cassette size not recognized horizontally

System fails to recognize cassette size when inserted horizontally; displayed value on control handle does not show correct size

Ranked causes

1. Cassette positioned outside tolerance range (common)

First check

Insert 9.5" x 12" cassette horizontally

Test point: Bucky unit cassette slot
Expected: Cassette recognizes as 9.5" x 12" on control handle, ±2 mm out of center

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

Cassette size not recognized in eccentric position

Cassette not detected when placed off-center in Bucky unit

Ranked causes

1. Non-12 inch cassette in eccentric position (common)

First check

Test cassette detection in eccentric position with all available site cassettes

Test point: control handle display
Expected: 12 inch cassettes detected; others may not register

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

Cassette size not recognized vertically

9.5 x 9.5 inch cassette size not displayed correctly on control handle when inserted vertically

Ranked causes

1. Cassette inserted outside vertical tolerance range (common)

First check

Insert 9.5 x 9.5 inch vertical cassette and verify size recognition

Test point: control handle display
Expected: 9.5 x 9.5 inch size recognized, ±4 mm out of center

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

Cassette size not recognized with template

Template fails to detect cassette sizes in both directions; sizes should be 9.5×12", 10×12", 9.5×9.5", 7×5"

Ranked causes

1. Cassette not positioned within tolerance in eccentric position (common)

First check

Cassette size recognition with template in both directions

Test point: Template
Expected: 9.5×12", 10×12", 9.5×9.5", 7×5" recognized

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

Cassette support plate conversion from left to right version caution

Reconfiguring the cassette support plate to operate on the opposite side, including cam rotation and axis relocation

Ranked causes

1. Cassette support plate requires directional conversion (unknown)

First check

Verify torsion springs are correctly positioned after axis relocation

Test point: Torsion springs
Expected: Correct position

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

Collimator selftest fails caution

Red LEDs on LA2 and LA4 boards are not OFF; shutters do not open/close; ruler does not roll up or stop correctly

Ranked causes

2. Power supply 5V/24V failure (occasional)

First check

Verify red LEDs on LA2 and LA4 boards

Test point: LA2 and LA4 boards
Expected: Red LEDs OFF after selftest

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

Control handle selftest fails

Control handle displays do not illuminate; main display does not indicate selftest running; red LED under cover not flashing

Ranked causes

2. Circuit breaker tripped (common)

First check

Verify mains supply to control handle

Test point: Control handle power input
Expected: Mains voltage present

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

Exposure not possible radiation

X-ray exposure function fails to initiate.

Ranked causes

1. Exposure subsystem fault (unknown)

First check

Verify exposure subsystem status

Test point: Status LEDs and CAN bus controllers
Expected: Exposure ready for operation

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

Generator delay time verification radiation

Verify that the bucky delay time matches the specific generator type's delay specification. Different generator models require different delay ranges (3–60 ms).

Ranked causes

1. Generator type mismatch with bucky delay setting (occasional)

First check

Verify generator type installed on system

Test point: Generator identification label
Expected: One of: OPTIMUS, SCP, MEDIO CP/CPH, MCM, MM 80/85, MM 100/150, SM 40/70, SM 80/100, MEDIO 51

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

Generator ready sequence not completing

Red status LED does not light off; relay EN K1 does not switch on; READY lamp on control desk display does not light

Ranked causes

1. External safety switches not ready (door contact, thermal contact, or tube overloaded) (common)

First check

Verify all external safety switches in ready state

Test point: Unit ready; door contact closed; thermal tube contact closed; tube not overloaded
Expected: All switches ready

Grid release switch adjustment caution

Verify and adjust the grid release switch position and magnet brake distance for proper operation

Ranked causes

1. Grid release switch requires adjustment or verification (unknown)

First check

Measure distance between holder and magnet brake after powering on

Test point: Between holder (1) and magnet brake (2)
Expected: ≤12 mm, ≤12 mm

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

Grid release switch requires adjustment

Magnet brake distance and switch position must be verified and adjusted for proper operation

Ranked causes

1. Misaligned holder or incorrect magnet brake distance (unknown)

First check

Verify holder parallelism with respect to magnet brake

Test point: holder and magnet brake
Expected: parallel alignment

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

Horizontal size recognition tolerance failure

Cassette size not recognized within acceptable horizontal centering tolerance; displayed value on control handle incorrect

Ranked causes

1. Cassette positioned outside ±2 mm horizontal tolerance (common)

First check

Insert 9.5×12" cassette horizontally

Test point: Cassette position center
Expected: Cassette recognized; positioning display within ±2 mm, ±2 mm out of center

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

Incorrect measurement display for film size on VA2

Film size display reads incorrectly due to inch/metric programming setting being in wrong position. 11x14" displays as 12x14", 10x12" as 9.5x12", or 9.5x12" as 10x12"

Ranked causes

1. S1.1 switch set to incorrect position (inch/metric) (common)

First check

Verify current S1.1 switch position

Test point: S1.1 switch on VA2
Expected: OFF for inch mode or ON for metric mode

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

Selftest fails or does not complete

BuckyDiagnost system does not run through selftest after power-on; status LEDs not flashing after successful selftest.

Ranked causes

1. Controller communication failure or firmware issue (unknown)

Selftest failure or yellow LED flashing continuously

System completes power-on but status LEDs flash yellow indicating busy CAN bus communication or controllers not responding.

Ranked causes

1. CAN bus communication fault or controller unresponsive (common)

First check

Observe status LED behavior during and after selftest

Test point: Bucky controller board status LEDs (red, yellow, green)
Expected: LEDs flashing during selftest; steady after selftest completes

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More symptoms

Sensor contamination or damage
Sensor supply voltage out of range
Sensor-encoder plate distance incorrect
System does not indicate ready or exposure cannot be released
System ready indication fails
Test exposure for delay time validation
Tomo collimator angle not defined
Tomo collimator height not defined
Tomo collimator height too high
Tomo collimator height too low
Tomo collimator sync position not defined
Tomo servo relay stuck
Tomo table top move failure
Tomography not possible
Torsion springs replacement
Torsion springs require replacement
Tracking not possible
Unrecognized cassette format detection
Verify cassette centric position
Vertical short/long sensor replacement
Vertical size recognition tolerance failure
Zero voltage output at X15/X16 connectors

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

Error codes

Code	Meaning	Trigger	Severity
`0200`	Tomo node state unknown or Tomo drive internal error	Tomography run initialization or operation	error
`0201`	Tomo drive CAN event	CAN bus communication event	warning
`0202`	Tomo test relay stuck	Test relay K4 on SZ1 remains activated	error
`0203`	Tomo enable X relay active	Relay K3 on SZ1 activation during starting phase	warning
`0204`	Tomo test relay dead	Test relay K4 fails to switch	error
`0205`	Tomo register device changed	Different RGDV selected during tomography run	warning
`0206`	Unknown error code 0206	Unknown	unknown
`0207`	Tomo safety relay opened	Safety relay K1 on SZ1 opens unexpectedly	critical
`0208`	Tomo controller timeout	Tomography sequence exceeds time limit	error
`0209`	Tomo master/Alpha/Tray drive down	Tomo drive unit cannot communicate via CAN bus	critical
`0210`	Tomo state machine crash	Tomography control software state error	critical
`0211`	Tomo not activated	Tomography drive not energized before run	error
`0212`	Tomo not prepared	Tray/CS/Alpha fails to reach start position	error
`0213`	Tomo X-ray stopped during run	X-ray generator stops during tomography	error
`0214`	Tomo exposure button 2 not pressed	Exposure release switch RQ_SN_X not held throughout exposure	info
`0215`	Tomo safety relay stuck	Safety relay K1 state not recognized	error
`0216`	Tomo run abort reason unknown	Tomography sequence aborted without error code	warning
`0217`	Tomo run aborted	Tomography sequence terminated by system or operator	warning
`0218`	Tomo controller crash	Tomography controller internal failure	critical
`0219`	Tomo servo relay stuck (UE2 K1 not functioning)	Relay UE2 K1 recognized by bucky controller but relay function not responding	error
`0220`	Tomo table top move failure	Tomography table top does not move to expected position	error
`0250`	Tomo collimation system transfer not defined	Position switch or height sensor caused unexpected function during tomo run	warning
`0251`	Tomo collimation system height not defined	Height sensor signal absent or out of expected range during tomo run	warning
`0252`	Tomo collimation system height too low	Height sensor reading below minimum threshold during tomo run	warning
`0253`	Tomo collimation system height too high	Height sensor reading above maximum threshold during tomo run	warning
`0254`	Tomo collimation system beta angle not defined	Switch UFB S1 signal absent or threshold not met during tomo run	warning
`0255`	Tomo tbl hght too low	Tomography table height sensor or position switch fault during tomo run	warning
`0256`	Tomo tbl hght too high	Tomography table height too high during tomo run	warning
`0257`	Tomo cs beta not def	Tomography cs beta parameter not defined	warning
`0258`	Tomo cs beta not def	Tomography cs beta parameter not defined	warning
`0300`	Error log init	Bucky controller firmware changed, battery not connected at W2, or SZ1 defective	error
`0301`	Servicedata init	Service data initialization failure	error
`0302`	Servicedata special	Service data special parameter issue	error
`0303`	Servicedata param	Service data parameter issue	error
`0304`	Servicedata unconfig	Service data unconfigured	error
`0400`	CAN node disconnect	CAN node becomes disconnected from the bus	error
`0401`	CAN node start fail	CAN node fails to start	error
`0402`	CAN node guarding fail	CAN node guard mechanism failure	error
`0403`	CAN node unknown	Unknown CAN node detected	warning
`0404`	CAN node prepare fail	CAN node preparation failed	error
`0405`	CAN node rx queue fail	CAN receive queue fails or overflows	error
`0406`	CAN node CAN overrun	CAN bus overrun condition detected	error
`0407`	CAN node CAN bus off	CAN bus enters off state	error
`0408`	CAN node err status bit	Error status bit set on CAN node	error
`0409`	CAN node tx queue over	CAN transmit queue overflows	error
`0410`	CAN local node discon	Local CAN node becomes disconnected	error
`0411`	CAN node stopped	CAN node operation stopped	error
`0412`	CAN node guard again	CAN node guarding recurs	error
`0413`	CAN node connect fail	CAN node fails to connect	error
`0414`	CAN slave node discon	CAN slave node becomes disconnected	error
`0415`	CAN node started	CAN node started successfully	info
`0416`	CAN msg def fail	CAN message definition error	error
`0700`	System invalid register device	Invalid generator configuration	error
`0701`	System register device not 2 rooms	Generator and bucky controller register device mismatch	error
`0702`	System SID invalid	SID calculation fails	error
`0703`	System raster not released	Grid start and timer sequence failure	error
`0800`	Collimator filter invalid	Bucky controller receives unknown filter info from collimator	error
`0801`	Collimator fieldsize invalid	Bucky controller receives unknown fieldsize info from collimator	error
`0802`	Collimator ruler error	Bucky controller receives unknown ruler value from collimator	error
`0803`	Collimator no local APRs	All local APRs on bucky controller are invalid	error
`0900`	CS long invalid	Longitudinal position sensing failure.	error
`0901`	CS trans invalid	Transverse position sensing failure.	error
`0902`	CS hght def invalid	Height definition position sensing failure.	error
`0903`	CS tomo hght mismatch	Tomography height adjustment mismatch detected.	error
`0904`	CS hght invalid	Height position sensing failure.	error
`0905`	CS hght sens short cct	Height sensor short circuit detected.	error
`0906`	CS hght sens open cct	Height sensor open circuit detected.	error
`0907`	Table hght invalid	Table height position sensing failure.	error
`0908`	Table hght sens short	Table height sensor short circuit detected.	error
`0909`	Table hght sens open	Table height sensor open circuit detected.	error
`0910`	CS alpha invalid	CS rotation alpha position sensing failure.	error
`0911`	CS beta invalid	CS rotation beta position sensing failure.	error
`0912`	WS hght invalid	Wallstand height position sensing failure.	error
`0913`	WS hght sens short cct	Wallstand height sensor short circuit detected.	error
`0914`	WS hght sens open cct	Wallstand height sensor open circuit detected.	error
`0915`	WS hght mismatch	Wallstand height position mismatch on tilted bucky unit.	error
`0916`	WS tilt invalid	Wallstand tilt position sensing failure.	error
`1000`	Bst watchdog	Bucky controller self-test failure on watchdog timer	critical
`1001`	Bst ram	Power-up RAM test failure	critical
`1002`	Bst eprom low byte	EPROM low byte self-test failure	critical
`1003`	Bst eprom high byte	EPROM high byte self-test failure	critical
`1004`	Bst uart	UART self-test failure, V24 port fails	critical
`1005`	Bst CAN controller	CAN controller self-test failure	critical
`1006`	Bst corrupt error log	Error log corruption detected during self-test	critical
`1007`	Bst servicedata upgrade	Service data upgrade detected during self-test	warning
`1008`	Bst servicedata downgr.	Service data downgrade detected during self-test	warning
`1009`	Bst two should be set	Configuration error in self-test	error
`1010`	Bst room two CAN master	Room 2 CAN master configuration error detected	error
`1011`	Bst old world also set	Old world configuration error detected	error
`1012`	Bst info level cancel	Logging level configuration error	info
`1013`	Bst dev info level	Development info level configuration error	info
`1014`	Bst CAN master override	CAN master override condition detected	unknown
`1015`	Bst not CAN master	System not configured as CAN master	unknown
`1016`	Bst two rooms with URF	Invalid configuration: two rooms with URF	unknown
`1017`	Bst OWI with URF	Invalid OWI with URF configuration detected	unknown
`1018`	Bst master with URF	Invalid master with URF configuration detected	unknown
`1019`	Bst selftest failed	Overall self-test failure on bucky controller	critical
`1100`	CH general - Unknown control handle connected	System detects unrecognized control handle	error
`1101`	CH test relay stuck	Relay on control handle self-test fails	critical
`1102`	CH test watchdog	Watchdog timer test fails	info
`1103`	CH test key stuck	Control handle key detected as stuck	critical
`1104`	CH test RAM	RAM self-test fails on control handle	critical
`1105`	CH test EPROM	EPROM self-test fails on control handle	critical
`1106`	CH test CAN	CAN controller self-test fails	critical
`1200`	Bucky controller processor error	Watchdog reset by software	error
`1300`	Tracking timeout at calibration	Calibration sequence timeout	error
`1301`	Tracking timeout at velocity	Velocity measurement timeout	error
`1302`	Tracking timeout at position	Position measurement timeout	error
`1303`	Tracking height inconsistent	Height measurement inconsistency detected	error
`1304`	Tracking reached position inconsistency	Position reached but inconsistent	error
`1305`	Tracking CSD error message	CSD communication error	error
`Cassette format not recognized`	Cassette size does not match any entry in the centric position table	Encoder signals do not correspond to any standard cassette format	warning

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

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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.