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GE AMX 4 error code


Mia guo

GE AMX 4 error code

January 18, 2007 11:44

My GE AMX 4 call error:465,435,439. who could you tell me which it meaning?


best regards

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Mario Mancha

Re: GE AMX 4 error code

January 19, 2007 11:30

465 current com feedback is low during exp
check calibration
and battery volt drop during exp
435 tap fbk error
check taps, connection to 1khz brd
tap selecttion circuitry
439 x ray sig error
check exp signal

hope it helps you

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Mia guo

Re: GE AMX 4 error code

January 20, 2007 02:51

Thank you very much your reply, your message is very useful to me,because i have not service manual.

best regards
Hua guo

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Ralph Childs

Re: GE AMX 4 error code

January 20, 2007 11:03


You can try to enter the calibration program and regenerate the cal table. I would clean the tube wells and replaces the silicon grease. However, you probably have a defective xray tube.


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Manuel Casanova

Re: GE AMX 4 error code

January 21, 2007 08:58



1. Usually Caused By Unit Traveling From Carpet To Tile; Going On To
Elevators; Driving Over Uneven Tile Floors - Non-Fatal

ERRORS 100 TO 107
1. Recalibrate The Charger
2. Replace The Charger Board
3. ERROR 103 - Safety Contactor Contacts Stuck Closed
4. ERROR 104 - Refer to Service Note 3684

ERRORS 210 AND 211
1. Check The Drive Controller Board

1. Check The Drive Motors For Operation
2. Make Sure Brakes Release
3. Check The Drive Boards

ERRORS 214 TO 217 (214 / 215 LEFT DRIVE - 216 / 217 RIGHT DRIVE)
1. Check Drive Motors/Motor Brushes
2. Check Drive Boards And Connections To Those Boards
3. Check Fuse AMX1A3F9 (+BATT)
4. Check Wires (push-On Terminals) To Both Fuse Holders (F1 & F2)--Pull Each One Off
And On Once To Clean Terminals (Oxidation Issues)
5. Loose Leads On K1 And K2 Relays On Drive Power Amp Board
6. Excessive “play” in Main Drive Wheels - Internal Gearing In Drive Wheels Worn

1. Check For Defective Crimp Connections On Harness Leads
Between Handle Assy. And J8 Plug To CPU
2. Defective CPU Or Drive Control/Drive Power Amp. Boards
3. Re-Cal Drive Handle With Drive Enable Picked Up; Can’t Cal
Handle-Replace Handle Assy.
4. Shorted Diode On Brake Assy.
5. Defective Handle Enable Switch(es)
6. CPU 10V Ref. To Handle Transducers Missing Or Low
7. Possible Tube Park Latch Problem (Also Applies To Newer Hall Effect)
8. Drive Wheel Problems--Drive Belt, Foreign Material Buildup On Axle
9. Bumper Switch Problems
10. Bad Front Casters
11. Bad Motor Brushes - See NOTE 2 Below.
12. Bad LVLE Power Supply
13. Check R1 And R2 (Dynamic Brake Resistors) For Proper Soldering/Connection



NOTE 1: Verify That On Older Units That FMI-10231 Was Accomplished (Upgrading
The Drive Control Board 46-232834G1-C/G1-D).
NOTE 2: Random 200 Series Errors Could Be Caused By Loose Connections At K1 And K2
Drive Relays, Or Bad Motor Brushes (single brush assembly is 2170759). Check For
Curled Fish-paper Insulator On Rear Of The Cassette Draw That Might Be Cutting Into The Cable Assemblies.
NOTE 3: Runs On Charger Board J2-5 To K215 And On Drive Amp Board J10 To K145 And
J5 Or J6 To K145 Burned Open = Shorted Brake Assembly (CQA 911200)
NOTE 4: Stall LED(s) Lit On Drive Control Board -Try Re-Calibrating The Handle - Also Could
Be Caused By Poor Ground Connections On AMX1A2TS1-4, 5, 6, Or 7 (Behind LVLE)
NOTE 5: “RELEASE HANDLE” Message And Unit Stops (Intermittent) - F9 Fuse/Fuse-holder
NOTE 6: AMX-4 Jerks Forward-Faster Than MAX Speed--+15vdc (LVLE) Dropped To +9vdc.
Replace LVLE (T3497L). Refer To CQA 965947
NOTE 7: Unit Drives At Slow Speed Initially (NO Error Codes), And Eventually Gets Up To Proper
SOLUTION: On Newer Style Base Assemblies, With The Newer Motor
Mounting Assy. - Check For Drive Belt Tightness (The Motors Are NOT Spring-Loaded; They Are Tightened Down After The Proper Belt Tension Is Obtained.

ERROR 320 (And Possibly 458 ERROR)
1. Check F93 On Rotor Board
2. Check F7 On AMX1A3
3. Check For 60 Hz Phase 1 Signal At Anode Of CR53 And 60 Hz Phase 2
Signal At Anode Of CR66 On Rotor Board
4. Bad Rotor Board
5. Bad CPU Board
6. Check Rotor/Stator Cable
7. Bad CR179 On FIL/KVP Board

1. Items 1. And 3. From Error 320
2. Check For 27 VAC At J4-6 & 7 On Rotor Board
3. Check For 60 Hz Inverter Signal OK Signal At J1-5 On The Rotor Board
4. If Error 320 Occurs After Error 321, There May Be A Temperature
Problem On The 60 Hz Inverter

1. Check Charger Board Feedback At U123(U77) Pin 5 Of CPU Board
2. Check Charger Board Feedback And Make Sure It Is Going
Out To The CPU (TP-6 On The Charger Board)
3. Check Ribbon Cable From The Charger Board To The CPU Board
4. Batteries May Be Defective If Voltage Is Really Less Than 90 Volts
5. Bad Charger Board
6. Loose Battery Terminals


1. Items 1. Thru 3. From Error 322
2. Batteries May Be Defective If Voltage Is Really More Than 150 Volts

Note: If Unit Does Not Charge (No Voltage Across Sense Resistor A3R1) - Verify That
The Safety Contactor Contacts Are Not Welded Shut

1. Defective RAM On CPU Board
2. Defective CPU Board

1. Check That All Contactors K1 Thru K6 On AMX1A4 Panel Pull In
When PREP Is Pressed
2. Check Installation Of Ribbon Cable From 1 KHZ Board To CPU Board
Or Opto-Couplers On 1 KHZ Board

1. Defective FIL/KVP Board

1. If 437 Occurs After Exposure, Check HV Xformer Spark Gaps (0.010”) Or
XRT May Be Spitting
2. If 437 Occurs Other Than During Or After An Exposure, The X-RAY ON
Signal May Be Active (As During Pickup Of Drive Handle Or While Driving)
3. Check Snubbers Across Drive Relays
4. Static Problems (Units Prior To Oct. 1993) ESD Kit 46-329334G1 (S/N 3411-
CPU Board Should Be 46-264974G1 Or Later And FIL/KVP Board Should Be
46-264986G1 Or Later). Measure Drive Wheels To Ground = 8 -10K But Not
>25K --- Wheel Shaft To Ground = 5 -10 Ohms
5. Poor Connection To RC Filter Across Q3 Power Pack
6. Poor Safety Contactor Operation During PREP (Safety Contactor OR Microswitch)
7. Insulate (On Older Units) Capacitor C5 From It’s Retaining Clamp (S/N 3265)
8. Bad CPU Board
9. Poor Connections(s); Battery Leads, Tap Relays, Etc.
10. Poor Pin Spread On High Voltage Cables
11. Bad Charger Board
12. Bad Drive Handle/Drive Handle Enable Switches—Injecting Noise Into CPU Board (Also
XRAY And SONALERT May Activate)
13. No Diode Across Coil Of K1 Coil (Overall Schematic Sheet #2, Loc. 7-F). CQA 943970
14. During KVP Cal - Make Sure Jumper Between TP-14 And TP-15 Is NOT Open


ERROR 439 - Will Also Cause Lite Films
1. Recalibrate The Generator Only If The Exposure Time Is Longer Than 2 Msec
And The KVP Is Less Than Or Equal To 75% Of Selected KVP
2. Check That K7 Contactor On AMX1A4 Panel Closes (Contacts Welded/Loose Leads/Bad
Coil)/Verify Proper Microswitch (Aux) Closure (Contactor Kit 46-262695P5). A Faulty K7
Might Not Give Any Errors—But You Will Not Be Able To CAL THE CHARGER In The Calibration Mode. — As A Rule, If The Unit Was Manufactured Prior To 6-94, REPLACE The Contactor Assembly (46-262695P5)
3. FIL/KVP Board May Be Defective
4. 1 KHZ Board May Be Defective
5. Loose Connectors On FIL/KVP Or 1KHZ Board
6. Stop/Start SCR Q3 On AMX1A4 Panel May Be Defective
7. If EXP START Is Shaky Or Hi All The Time (It Should Be A Pulse),
Troubleshoot The EXP START CMND Circuit On The 1 KHZ Board
8. Verify That The Tap Relays Contacts Are Coming In Firmly - No External Interference
(Fish-paper Loose/Curled On Inside Side Cover?)
9. Loose Leads On Service Toggle Switch (Not Going To Applications)
10. Bad CPU Board
11. Bad Rotor Board
12. Bad High Voltage Transformer
13. Loose Anode OR Cathode High Voltage Cable-Spread Pins At Both Ends Of Cathode HV
14. P1/P2 Leads Exhibit Leakage To Ground
15. 439 And 462 Errors Together Indicate Battery/Cell Problems
16. 439 And 43E Errors - Replace FIL/KVP And 1KHZ Boards - Check Fil. H/V Cable
17. AMX1A4C5 Leaky To Ground
18. Refer To Item 19. -- 469 ERROR Listing
19. AMX1A4C6 Bad (FIL/KVP Bd. J8 Pins 1 & 2)
20. Soft Batteries/Cells
21. Bad Main SCR(s) Q1 Or Q2
22. Bad AMX1A4R7 (Auto-Transformer)
23. Bad Tap Relay(s) – Check The K6 Tap Relay For Good Normally Closed Contacts

1. Bad CPU Board
2. Bad Cables From CPU To 1 KHZ Inverter Board And CPU To FIL/KVP Board
3. H/V Cable(s) Bad
4. H/V Xformer Bad (Also Breaker Trips)
5. Bad Or Old Style 1 KHZ Board - Replace With Newer 46-288764G1 Board -
(Has More Noise Immunity)
6. Replace FIL/KVP Board
7. Check Tap Relay(s) [Contacts]
8. X-Ray Control Module Assy. Bad

1. Re-Cal. Required (KVP Or MAS Out Of Tolerance)
2. Loose Screws On AMX1A4 Q3 Block


1. If Q3 Block Was Replaced In The Field, Black/White Leads To Q3 Block
On AMX1A4 Panel Are Reversed Between G1/K1 And G2/K2
2. Check For Miswired Plug At J4 On 1 KHZ Board
3. Check EXP STOP CMND Circuit On 1 KHZ Board. EXP STOP CMND
And SCR HI/LO Are Single Pulses
4. Defective 1 KHZ Board
5. Defective Q3 Block On AMX1A4 Panel

1. Check Wiring To XRT Pressure Switch--Switch Should Be Closed. If Switch
Closure Rings Back To J3-6 & 7 Of CPU Board, Then Problem On CPU Board

1. Bad Rotor Board
2. Bad 1Khz Board (No “INVERTER READY”)

1. Bad FIL/KVP Board
2. Bad CPU Board
3. Bad 1KHZ Board

1. Check Ribbon Cable From 1 KHZ Board To CPU Board
2. Troubleshoot The 1 KHZ Board—Could Be BAD
3. Bad CPU Board
4. Bad Tap Relay(s) - Feedback

1. Defective Rotor Board
2. Bad FIL/KVP Board

ERROR 458 (Could Be With ERROR 320)
1. F93 Blown On Rotor Board
2. Check For Phase 1 & 2 Signals Coming From CPU Board At Anode Of CR53 And CR66
3. Check For Correct Wiring Of TS2 On Rotor/Charger Panel AMX1A3
4. Check For Correct Plug Location And Lead Orientation Of All
Connections To The Rotor Board
5. Check For Correct Wiring Of BLK/WH/GRN Leads To Tube Stator From J4 Of Rotor Bd.
6. Check For Correct Lead Orientation To CR4 On AMX1A4 Panel
7. Check That R6 Above Autotransformer On AMX1A4 Panel (Older Units)
Is Not Shorted To Chassis Ground
8. Check For Correct Wiring Of Plug To J8 Of FIL/KVP Board
9. Check For Square Wave At C6 On AMX1A4 Panel
10. Bad Rotor Board
11. Open Rotor Lead(s)
12. Bad Ribbon Cable To CPU From Rotor Board (Ribbon Cable 46-302366P1)
13. Check Lead Tightness Associated With Components AMX1A3C2 And AMX1A3R3


1. Check The Cable Connection From The CPU Board To The FIL/KVP Board – Bad
Cable (46-302366P2)

1. Bad FIL/KVP Board

1. FIL/KVP Board May Be Defective

1. Check For 80 VAC At CR4 Black Leads On AMX1A4 Panel With PREP Pressed
2. Check For About 75 VDC Across AMX1A4 C2/C12 With PREP Pressed
3. Check For Correct Polarity Of CR1 & CR2 (CR7/CR13) On AMX1A4 Panel
4. Bad 1KHZ Board
5. Are The Tap Relays Energizing?
6. Is “Stop Cap” At J4-11 (1 Khz Board) Approximately 80 VDC?

1. Bad FIL/KVP Board
2. FIL SHORTED (Check J2-25 On FIL/KVP Board)
3. Bad CPU Board

1. Check For 2 KHZ Phase 1 & 2 Signals At J2-17 & 19 Of FIL/KVP Board
2. Check For Continuity Between J5 Plug On FIL/KVP Board And
Filament Terminals On HV Xformer
3. Check For Open Or Shorted Tube Small Filament – Is The Small Spot Lit During Prep?
A 6V Battery Voltage Can Be Applied Directly To The Filament To See If It Will Lite --- Even Though A Continuity Check Of The Filament Might Indicate It’s Ok
4. Check For Defective HV Cathode Cable (Internal Short)
5. Replace FIL/KVP Board - Check The +24 Volts To J1-2 Of FIL/KVP Board
6. Is The XRT From Another Vendor? (Must Have Internal Resistor In Series With
7. Bad High Voltage Divider (H/V Bleeder)
8. FIL SHORTED (Check J2-25 On FIL/KVP Board)

1. Check For Correct Wiring Between J5 Plug On FIL/KVP Board And HV Xformer
2. Check Spark Gaps On H/V Xformer (0.010”)
3. Check That HV Cables Are Not Reversed
4. Check Wiring Of J4 Plug To FIL/KVP Board
5. Check That U18 On FIL/KVP Board Is #1489--NOT #14C89
6. Bad FIL/KVP BOARD (See Additional Notes #3)
7. FIL SHORTED (Check J2-25 On FIL/KVP Board)
8. Insufficient Filament Drive (XS-1 To XS-2 [HV Transformer] = Approximately 17 VAC @
52 KVP With PREP)
9. Loose J3 On Filter Board


1. Check Wires To Q3 Block On AMX1A4 Panel For Loose Connections
2. Faulty MA Metering Circuit - Or Out Of Cal – (AR125, Pin 1 Or TP-3 [Ref. TP-5] On
FIL/KVP Board = 4.7V/100MA)
3. Batteries May Be Soft - Refer To ERROR 465 - Could Be 1 Bad Cell Up To Full Pack
4. Could Be Faulty H/V Bleeder
5. Charger Board Failure Or Fuse F4 Open
6. Errors 462 And 466 - Tripping Breaker With Exposures Above 48 KVP = Replace
H/V Transformer
7. Error 462 On Exposures >70 KVP And Error 439 Closed Loop Resistance?) = Re-Calibrate Unit
8. ERROR 462 During Cal. With NO Exposure Termination (Counts Actual Time)—In
Check-Sum Bypass Mode, The Exposure Terminates Normally (Uses Time Selection
9. FIL/KVP Board J3 Pins 3 And 4 (Jumper Has High Resistance)
10. Loose Battery Connections

1. Bad CPU
2. Bad FIL/KVP Board
3. Error 463 And 469 - Loose Connection On/Or Bad 1 KHZ Board
4. Safety Contactor Contact Issue

1. Check J2 Plug From T2 On AMX1A4 Panel/Clean J3 On FIL/KVP Board
2. FIL/KVP Board May Be Defective
3. Batteries May Be Soft. Perform The Load Test.
a. Connect Oscilloscope From Circuit Breaker To Ground - Use Sample Mode
b. Make Exposures At 80, 100 KVP And 125 KVP, About 10 MAS
c. Read Battery Voltage And Average The Ripple At The Bottom
d. Battery Voltage Should Drop About 13 VDC +/-10% At 80 KVP
e. Battery Voltage Should Drop About 16 VDC +/-10% At 100KVP
f. Battery Voltage Should Drop About 17 VDC +/-10% At 125KVP
4. If Batteries Pass Load Test, Unit May Require Recalibration Of MAS, KVP,
Taps And Filament Current Tables
5. If Batteries Do Not Pass The Load Test, You Get To Replace Them!!

1. During Calibration, Take Unit Out Of Calibration And Reset CPU Then
Restart Generator Calibration (MAS, KVP, Taps, And Filament Current Table)
2. Check Spark Gaps On HV Xformer For A 0.010” Setting
3. Check For Miswired Or Open Plug J2 From T2 On AMX1A4 Panel
To HV Xformer MA+ & MA-
4. Check For HV Xformer Spits
5. Check For XRT HV Spits
6. CPU Board May Be Defective
7. Insulate (On Older Units) Capacitor C5 From It’s Retaining Clamp (Ref. To S/N 3265)


1. Capacitor C5 Leaky (Does Not Apply To AMX-4+ Units)
2. Bad CPU
3. Bad Cell(s)
4. Bad FIL/KVP Board
5. Unit Calibration Required (If In The “CHECKSUM-BYPASS” Mode)
6. H/V Cable Open/Shorted Internally Or Poor Pin Spread On H/V Candles

During Calibration:
1. Check If K7 Contactor On AMX1A4 Panel Pulls In - Check For Welded Contacts
2. Check That No Wires Or Side Cover Insulation Interfere With K1 Thru K6
Contactors On AMX1A4 Panel
3. Check For Bad Crimp On Red Lead To AA Of Q3 On AMX1A4 Panel
4. Check For Defective Jumper Harness From J3 On 1 KHZ Board To J7 On
5. HV Cathode Cable May Be Shorted
6. FIL/KVP Board May Be Defective
7. 1 KHZ Board May Be Defective
8. Check Spark Gaps On HV Xformer For 0.010”
9. Check For Location Of Black & White Leads On Q3 Block On AMX1A4 Panel
10. Q3 Block May Be Defective
11. Check If EXP START CMND Is Shaky (This Is Like 439 During Applications).
EXP START And SCR HI/LO Are Single Pulses
12. “XRAY ON” Going Low = Bad Tap Relay Contact(s)
13. Bad Handswitch
14. Bad Rotor Board - Also Check Stator Lead(s) For Continuity
16. Bad XRT - (HI FIL LIMIT ERROR) With 439, 467, OR 469 Error Alone - Usually At
Higher KVP’s (KVP Waveform Will Be Low On The Front End, Even In Check-Sum
Bypass Mode)
17. Bad High Voltage Transformer
18. C5 Leaky Or Bad
19. 439 And 469 ERRORS – Check ALL Leads That Exit The AMX1A4T1
Autotransformer --- Look For Pinched Or Shorted Leads To Ground
20. Check Pin Spread On Both Ends Of Cathode Cable (Also Check For Proper Amount
Of Grease In High Voltage Cable Wells)
21. Refer To ERROR 439 - Item 2.

During Applications:
1. There May Be Oscillations Or Trash On The “XRAY ON” Signal
(Could Be Bad Tap Relay Contact(s)
2. Could Be An XRT Spit Or Bad XRT
3. Possible CPU Board Failure
4. Hand Switch Or Coil Cord Failure
5. Soft Batteries/Cells
6. Tap Relay Contact Bounce - Replace 1 KHZ Board
7. Side Cover Fish Paper Insulation Impacting Tap Relays When Cover Installed
8. Bad Handswitch
9. Bad Rotor Board
10. Check Stator Lead(s) Continuity
11. Refer Also To Faults “During Calibration” Above


1. Static Problems - Refer To ERROR 437, Step 4.
2. LVLE Problem (+24 VDC)—Refer To FMI-10359 For Original Supplies
3. +24 Getting “Gliched”
4. Bad Display/Display Controller (Newer Display Board 46-232832G1
Per Service Note 3611)
5. Park Switch Latch (Metal Shavings) = Short +24 To Ground - Get New
Hall Effect Latch Kit 46-316198G1
6. NOVRAM Lithium Battery Drop-off
7. Metal Shavings (fine powder) On CPU Board
8. Replace “old” Style LVLE With T3497L
9. Exercise Collimator Blades And Flex Cable At Rear Of Collimator While “Scoping”
The +24 Volt Pin On The Output Of The LVLE

1. Bad Tube Park Latch (Old Style) = Shorted Switch Internal. Get New
Hall Effect Latch Switch Assy. Kit 46-316198G1
2. Bad Display Board Which Loads Down The LVLE Through Display
Controller Board

1. FIL/KVP Board Sees >15 KVP Above Demand
2. Input Power To Charger Board Stable?
3. Bad/Loose Connections On LVLE
4. Bad Connection J1 On CPU
5. Bad Connection J6 On FIL/KVP Board
6. Batteries Below 110 VDC Or Poor Regulation (Run The Load Test)
7. J2 1 KHZ Board -- +24 Volt Loss
8. Possible Bad 1 KHZ Board Inverter A4Q1 Or A4Q2 (Short Exposures
Approx. .59 Msec)
9. +24 Volt Line Going Low Intermittently
10. Bad LVLE (“Power Fail Detect” From LVLE To Newer Charger Board)
11. Bad Display Controller/Display Board
12. Check HV Xformer Spark Gaps (0.010”)
13. Re-Grease HV Xformer/XRT Wells
14. Remove Breaker Trip Lead--Still Trip = Bad Stop SCR Or Bad HV
Xformer Or Short On Secondary Of HV Xformer
15. Bad Tap Relay(s)
16. Insulate (On Older Units) Capacitor C5 From It’s Retaining Clamp (Ref.
Service Note 3265)
17. K150/K215 On Charger Board Faulty (Tap On It-Breaker Trips?)
18. During Calibration - Verify H/V Candles Greased And Pins Spread Properly
19. During Calibration - At Higher KVP’s (>120 KVP) - Re-Load Defaults And Try
Starting The Calibration With 112.5 VDC On The Battery Pack Instead Of 113.5 VDC


Additional Notes:

1. -- Problem

FILAMENT ERROR) Etc., Or Load Data In Data Base Access Properly, Can’t Enter
Calibration Mode OR Getting False Error Codes Displayed, After Changing Out The
CPU Board (T3497H/46-264974G2).

-- Solution

Remove The TWO NOVRAM Chips (U54 & U107) On The Newer CPU Board And
Replace Them With The TWO NOVRAM Chips From The Older CPU Board, If It Is
The Same Style Of Board. If The Board Is The “Older” Style Of CPU Board That Has
Only One NOVRAM Chip, Then Re-order A New CPU Board (T3497H), Or Replace
The NOVRAM Chip(s) (46-230318P1).

2. “XRAY DISABLED” Message In Applications (On Boot-Up, Message Is “RELEASE
PREP” - This Usually Indicates A Bad Hand-Switch Assembly.

3. Open Filament In XRT (ERROR 45F) During Prep. Bad FIL/KVP Board (Q170, Q160
Or Q173 Shorted—Inverter Running At Maximum Output. CQA 964232.

4. Display Issues—Trashy, Scrolling Or No Display During Charge. Monitor LVLE +5 Volt
With A Scope For About 15 Minutes - Look For Break-Up (Noise) On +5 Volt Supply, If
Noise Is Evident, Replace The LVLE - If LVLE Appears OK, This Could Also Could Be
Caused By A Bad Display (Kit 2139946) Or Display Controller (46-264982G1). Also
Could Be Possible Charger Board Failure—Tap On Relays To See If Display Failure

5. MA Appears High And KVP’s Low-Can’t Get The MA Down - Check To See That The
Small Spot Is Boosting Rather Than The Large Spot (Filament Mis-wire In The XRT)

6. -- Problem

AMX1A4R7 smoking - NO Errors - KVP Waveform OK

-- Solution

BAD 1KHZ board (Primary Current P1/P2 Approx. 80 Amps Vice 50-60 Amps) - Also
Replace AMX1A4R7


7. -- Problem

KVP’s High In Applications And During And During KVP Calibration. In The “Check-
Sum Bypass Mode” (With Defaults Loaded), Tap Relays (80 KVP Selected) K2 And K4
NOT Selected.

-- Solution

Bad Charger Board (J1-5: “Battery V And Charger Currents” Output Improper).
NOTE: System Parameters Are Still “Looked At” In The “Check Sum By-pass” Mode.

8. -- Problem

KVP Output Waveform Initial Rise 10-20 KVP High For 4-5 Msec. (During Calibration
And Applications), And Then Drops To Proper Selected KVP Value. NO System Error
Codes Displayed During Applications Other Than Occasional “KVP LIMITS” Error
During Calibration.

-- Solution

Q3 Start/Stop SCR Bad And/Or FIL/KVP Board Bad.

9. -- Problem

High Pitched Squeal Coming From The LVLE (Low Voltage Power Supply)

-- Solution

Replace The Display Controller Board (46-264982G1)

10. -- Problem

No Display After Installing ESD Kit

-- Solution

Board Mounting Screw(s) Retaining Nut Lock-washers Impinge On The +40 VDC Bus On
The Display Board (46-232832G1). The +40 VDC Bus Is Too Close To The Retaining
Nut Lock-washers—Shorts Out The +40 VDC Bus When The ESD Kit Ground Cables
Are Added. Re-Position Existing Mounting Screws/Lock-washers. CQA 972174


11. -- Problem

F93 On Rotor Board Opens When A New FIL/KVP Board (46-264986G2) Is Installed--
FET’s On Rotor Board NOT Blown

-- Solution

J8 Connector On FIL/KVP Board Is Mis-keyed. Re-Orient Key On J8 (FIL/KVP Board
Side). CQA 972175

12. -- Problem

Release Handle Error - When Enabling And Pushing Handle Forward OR Back

-- Solution

Timing Issue With AMX1A5 K1 OR K2. Replace K1 And/Or K2

13. -- Problem

Both Large And Small Filaments Are Lit Simultaneously (View Thru The Port Of The
X-Ray Tube During Prep)

-- Solution

Common Lead In The Cathode Cable Or X-Ray Tube Is OPEN

14. -- Problem

Intermittent “X-Ray On Light” Or Sonalert Comes On During Charge Mode Or During Driving Or During Idle Mode

-- Solution

Replace The LVLE Power Supply (T3497L)


15. -- Problem

469 Error With The Following Resultant Waveform

-- Solution

Bad Tap Relay(s) – CONTACTS NOT FULLY Actuating (Ex. K4 At 80 KVP)

16. -- Problem (Troubleshooting Tip)

No “normal” KVP waveform can be viewed (Applications Or Check-Sum Bypass) With
Errors 439 Or 469

-- Solution

Temporarily Jumper TP-14 To TP-15 On FIL/KVP Board To Obtain A “normal” KVP

17. -- Problem

Unit Appears “Dead” (No Display) - Battery Voltage OK - +24 Volt Output Missing

-- Solution

Bad Hand-Switch (New Style) - Remove J8 On CPU (Controller Board) To Verify +24 Volt Supply Returns

18. -- Problem


-- Solution

This Might Indicate Possible Cell(s) Failure. There Are 3 Ways To Test Cells/Battery Pack: 1] Monitor Each Cell under A Lite Load Condition—Rotor Only; 2] Monitor Each
Cell Under A Heavy Load---80 KVP @ 125 MÁS. Cell Readings Should Be Within .2
VDC Of Each Other (Ex. 11.9 vdc To 12.1 vdc). There Should Be 113 VDC Across
The Battery Pack Prior To Running Tests 1 & 2 Above. 3] Refer Also To ERROR 465,
For The Battery Pack Load Test.
Secondly, This Could Indicate A “Synchronization” Issue — Refer To Section 14, Last
Page In Direction 46-017207 AMX-4 Proprietary Diagnostics – Run This Test Only On
Units With 46-329xxxGx Firmware. (The Voltmeter Calibration Has To Be Accurate In
Order To Run This Test Successfully). This “Sychronization” Routine Should Always Be
Run – 1) At The End Of Any Major Unit Calibration – 2) Upon Replacement Of The
Charger Board – 3) If The Unit Was Charged Outside Of Normal Applications Mode
(Check Sum Bypass Or Diagnostics Mode). Refer Also To Problem 24, Below.


19. -- Problem

Display Goes Out On Unit Intermittently

-- Solution

Check The 3 Pins On J1 (Feeds Battery Voltage To The LVLE Power Supply) And Make
Sure They Are Not Burnt

20. -- PROBLEM

Unit Resets Itself Under Load (while Driving, etc.)

-- Solution

Usually Indicates Bad Battery Cell(s) Or Loose Battery Terminal Connections

21. -- PROBLEM

During “CAL CHARGER” - Unit Works Up To 1.2 Volts - When Value Is Entered, Charger Shuts Off
And External Voltmeter Goes To Zero, Then You Get An “X-RAY BYTE LIMIT”.

-- Solution

Bad CPU Board

22. -- PROBLEM

Cannot Enter “SERVICE MODE” - But Portable Is Operational In Applications Mode


Bad Display Board

23. -- PROBLEM

“AUTO CAL LIMIT” Message Appears On The Status Display In Applications Mode


In Applications Mode, This Message Indicates That One Calibration Unit Has Exceeded It’s Proper Range (Cannot Tell Which One). The Calibration Philosophy Is Such That Each Cal Unit (In The Generator Calibration) Depends On The Prior Cal Unit That Was Accomplished (A Confidence Building Scheme). The ONLY Solution For This Error Is A COMPLETE Re-Calibration Of The AMX-4/4+ Unit. This Message Is Called Out In The Operators Manual, Under The “STATUS MESSAGES” Section.


24. -- PROBLEM



This Usually Indicates That The Unit Was Attempted To Be Operated (Rotor And
Exposure) Too Soon After A Charging Cycle. In Normal Applications, When The Unit Is
Unplugged, It is Normally Driven To Another Location (More Than 50 Feet), Thus Giving
The Batteries Time To “Level Off”.

25. -- PROBLEM


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Mia guo

Re: GE AMX 4 error code

January 25, 2007 12:10

thank you very much your reply ,i hope that more this informattion could help me in the future.
thanks and regards

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David Epperson

re: Re: GE AMX 4 error code

September 13, 2018 01:29

Incredible job on the response!

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anthony jose rodriguez contreras

re: GE AMX 4 error code

December 19, 2018 09:03

greetings I request service manual of amxa4

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