AMX - 4 / 4+ ERROR CODES / SOLUTIONS SUMMARY

GENERAL ELECTRIC COMPANY PROPRIETARY GE MEDICAL TECHNOLOGY SERVICES (GEMTS)

ERROR 191. Usually Caused By Unit Traveling From Carpet To Tile;Going On To

Elevators; Driving Over Uneven Tile Floors - Non-Fatal

ERRORS 100 TO 1071. Recalibrate The Charger2. Replace The Charger Board3. ERROR 103 - Safety Contactor Contacts Stuck Closed4. ERROR 104 - Refer to Service Note 3684

ERRORS 210 AND 2111. Check The Drive Controller Board

ERROR 12 AND 13 -- SHOWS AS LEFT OR RIGHT DRIVE STALL1. Check The Drive Motors For Operation2. Make Sure Brakes Release3. Check The Drive Boards

ERRORS 214 TO 217 (214 / 215 LEFT DRIVE - 216 / 217 RIGHT DRIVE)

1. Check Drive Motors/Motor Brushes2. Check Drive Boards And Connections To Those Boards3. Check Fuse AMX1A3F9 (+BATT) 4. Check Wires (push-On Terminals) To Both FuseHolders (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 AmpBoard6. Excessive “play” in Main Drive Wheels -Internal Gearing In Drive Wheels Worn

ERROR 2181. Check For Defective Crimp Connections On Harness Leads

Between Handle Assy. And J8 Plug To CPU2. Defective CPU Or Drive Control/Drive Power Amp. Boards3. Re-Cal Drive Handle With Drive Enable Picked Up; Can’tCal

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 Low7. Possible Tube Park Latch Problem (Also Applies To NewerHall Effect)8. Drive Wheel Problems--Drive Belt, Foreign MaterialBuildup On Axle9. Bumper Switch Problems10. Bad Front Casters11. Bad Motor Brushes - See NOTE 2 Below.12. Bad LVLE Power Supply

13. Check R1 And R2 (Dynamic Brake Resistors) ForProper Soldering/Connection

CONT’D……..

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NOTE 1: Verify That On Older Units That FMI-10231 WasAccomplished (Upgrading

The Drive Control Board 46-232834G1-C/G1-D).NOTE 2: Random 200 Series Errors Could Be Caused By LooseConnections At K1 And K2

Drive Relays, Or Bad Motor Brushes (single brushassembly is 2170759). Check ForCurled Fish-paper Insulator On Rear Of The Cassette Draw ThatMight Be Cutting Into The Cable Assemblies. NOTE 3: Runs On Charger Board J2-5 To K215 And On Drive Amp BoardJ10 To K145 And J5 Or J6 To K145 Burned Open = Shorted Brake Assembly (CQA911200)NOTE 4: Stall LED(s) Lit On Drive Control Board -TryRe-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

StressedNOTE 6: AMX-4 Jerks Forward-Faster Than MAX Speed--+15vdc (LVLE)Dropped To +9vdc.

Replace LVLE (T3497L). Refer To CQA 965947NOTE 7: Unit Drives At Slow Speed Initially (NO Error Codes), AndEventually Gets Up To Proper

Speed. SOLUTION: On Newer Style Base Assemblies, With

The Newer MotorMounting Assy. - Check For Drive Belt Tightness (The Motors AreNOT Spring-Loaded; They Are Tightened Down After The ProperBelt Tension Is Obtained.

ERROR 320 (And Possibly 458 ERROR)1. Check F93 On Rotor Board2. Check F7 On AMX1A33. Check For 60 Hz Phase 1 Signal At Anode Of CR53 And 60 HzPhase 2

Signal At Anode Of CR66 On Rotor Board4. Bad Rotor Board5. Bad CPU Board6. Check Rotor/Stator Cable7. Bad CR179 On FIL/KVP Board

ERROR 3211. Items 1. And 3. From Error 3202. Check For 27 VAC At J4-6 & 7 On Rotor Board

3. Check For 60 Hz Inverter Signal OK Signal At J1-5 On TheRotor Board4. If Error 320 Occurs After Error 321, There May Be ATemperature

Problem On The 60 Hz Inverter

ERROR 3221. Check Charger Board Feedback At U123(U77) Pin 5 Of CPUBoard2. 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 CPUBoard4. Batteries May Be Defective If Voltage Is Really Less Than90 Volts5. Bad Charger Board6. Loose Battery Terminals

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ERROR 3261. Items 1. Thru 3. From Error 3222. Batteries May Be Defective If Voltage Is ReallyMore Than 150 Volts

Note: If Unit Does Not Charge (No Voltage Across SenseResistor A3R1) - Verify That

The Safety Contactor Contacts Are Not Welded Shut

ERROR 42F1. Defective RAM On CPU Board2. Defective CPU Board

ERROR 4351. Check That All Contactors K1 Thru K6 On AMX1A4 Panel PullIn

When PREP Is Pressed2. Check Installation Of Ribbon Cable From 1 KHZ Board ToCPU Board

Or Opto-Couplers On 1 KHZ Board

ERROR 4361. Defective FIL/KVP Board

ERROR 437

1. If 437 Occurs After Exposure, Check HV Xformer Spark Gaps(0.010”) Or

XRT May Be Spitting2. If 437 Occurs Other Than During Or After An Exposure, TheX-RAY ON

Signal May Be Active (As During Pickup Of Drive Handle OrWhile Driving)3. Check Snubbers Across Drive Relays4. Static Problems (Units Prior To Oct. 1993) ESD Kit46-329334G1 (S/N 3411-CPU Board Should Be 46-264974G1 Or Later And FIL/KVP Board ShouldBe 46-264986G1 Or Later). Measure Drive Wheels To Ground = 8 -10KBut Not >25K --- Wheel Shaft To Ground = 5 -10 Ohms5. Poor Connection To RC Filter Across Q3 Power Pack6. Poor Safety Contactor Operation During PREP (SafetyContactor OR Microswitch)7. Insulate (On Older Units) Capacitor C5 From It’sRetaining Clamp (S/N 3265)8. Bad CPU Board9. Poor Connections(s); Battery Leads, Tap Relays, Etc.10. Poor Pin Spread On High Voltage Cables11. Bad Charger Board12. Bad Drive Handle/Drive Handle EnableSwitches—Injecting Noise Into CPU Board (Also

XRAY And SONALERT May Activate)13. No Diode Across Coil Of K1 Coil (Overall SchematicSheet #2, Loc. 7-F). CQA 94397014. During KVP Cal - Make Sure Jumper Between TP-14 AndTP-15 Is NOT Open

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ERROR 439 - Will Also Cause Lite Films1. Recalibrate The Generator Only If The Exposure Time IsLonger Than 2 Msec

And The KVP Is Less Than Or Equal To 75% Of Selected KVP2. Check That K7 Contactor On AMX1A4 Panel Closes(Contacts Welded/Loose Leads/Bad Coil)/Verify Proper Microswitch (Aux) Closure (Contactor Kit46-262695P5). A Faulty K7Might Not Give Any Errors—But You Will Not Be Able To CAL THECHARGER In The Calibration Mode. — As A Rule, If The Unit WasManufactured Prior To 6-94, REPLACE The Contactor Assembly

(46-262695P5)3. FIL/KVP Board May Be Defective4. 1 KHZ Board May Be Defective5. Loose Connectors On FIL/KVP Or 1KHZ Board6. Stop/Start SCR Q3 On AMX1A4 Panel May Be Defective7. If EXP START Is Shaky Or Hi All The Time (It Should Be APulse),

Troubleshoot The EXP START CMND Circuit On The 1 KHZBoard8. Verify That The Tap Relays Contacts Are Coming InFirmly - No External Interference

(Fish-paper Loose/Curled On Inside Side Cover?)9. Loose Leads On Service Toggle Switch (Not Going ToApplications)10. Bad CPU Board11. Bad Rotor Board12. Bad High Voltage Transformer13. Loose Anode OR Cathode High Voltage Cable-SpreadPins At Both Ends Of Cathode HV Cable

14. P1/P2 Leads Exhibit Leakage To Ground15. 439 And 462 Errors Together Indicate Battery/CellProblems16. 439 And 43E Errors - Replace FIL/KVP And 1KHZBoards - Check Fil. H/V Cable17. AMX1A4C5 Leaky To Ground18. Refer To Item 19. -- 469 ERROR Listing19. AMX1A4C6 Bad (FIL/KVP Bd. J8 Pins 1 & 2)20. Soft Batteries/Cells21. Bad Main SCR(s) Q1 Or Q222. Bad AMX1A4R7 (Auto-Transformer)23. Bad Tap Relay(s) – Check The K6 Tap Relay ForGood Normally Closed Contacts

ERROR 43B1. Bad CPU Board2. Bad Cables From CPU To 1 KHZ Inverter Board And CPU ToFIL/KVP Board3. H/V Cable(s) Bad4. H/V Xformer Bad (Also Breaker Trips)5. Bad Or Old Style 1 KHZ Board - Replace With Newer46-288764G1 Board -

(Has More Noise Immunity)6. Replace FIL/KVP Board7. Check Tap Relay(s) [Contacts]8. X-Ray Control Module Assy. Bad

ERROR 43E1. Re-Cal. Required (KVP Or MAS Out Of Tolerance)2. Loose Screws On AMX1A4 Q3 Block

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ERROR 4431. If Q3 Block Was Replaced In The Field, Black/White LeadsTo Q3 Block

On AMX1A4 Panel Are Reversed Between G1/K1 And G2/K22. Check For Miswired Plug At J4 On 1 KHZ Board3. Check EXP STOP CMND Circuit On 1 KHZ Board. EXP STOP CMND

And SCR HI/LO Are Single Pulses4. Defective 1 KHZ Board5. Defective Q3 Block On AMX1A4 Panel

ERROR 4501. Check Wiring To XRT Pressure Switch--Switch Should BeClosed. If Switch

Closure Rings Back To J3-6 & 7 Of CPU Board, Then ProblemOn CPU Board

ERROR 4531. Bad Rotor Board2. Bad 1Khz Board (No “INVERTER READY”)

ERROR 4541. Bad FIL/KVP Board2. Bad CPU Board3. Bad 1KHZ Board

ERROR 4561. Check Ribbon Cable From 1 KHZ Board To CPU Board2. Troubleshoot The 1 KHZ Board—Could Be BAD3. Bad CPU Board4. Bad Tap Relay(s) - Feedback

ERROR 4571. Defective Rotor Board2. Bad FIL/KVP Board

ERROR 458 (Could Be With ERROR 320)1. F93 Blown On Rotor Board2. Check For Phase 1 & 2 Signals Coming From CPU Board AtAnode Of CR53 And CR663. Check For Correct Wiring Of TS2 On Rotor/Charger PanelAMX1A34. Check For Correct Plug Location And Lead Orientation OfAll

Connections To The Rotor Board5. Check For Correct Wiring Of BLK/WH/GRN Leads To TubeStator 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 Board9. Check For Square Wave At C6 On AMX1A4 Panel10. Bad Rotor Board11. Open Rotor Lead(s)12. Bad Ribbon Cable To CPU From Rotor Board (RibbonCable 46-302366P1)13. Check Lead Tightness Associated With ComponentsAMX1A3C2 And AMX1A3R3

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ERROR 4591. Check The Cable Connection From The CPU Board ToThe FIL/KVP Board – Bad

Cable (46-302366P2)

ERROR 45A1. Bad FIL/KVP Board

ERROR 45B1. FIL/KVP Board May Be Defective

ERROR 45C1. Check For 80 VAC At CR4 Black Leads On AMX1A4 Panel WithPREP Pressed2. Check For About 75 VDC Across AMX1A4 C2/C12 With PREPPressed3. Check For Correct Polarity Of CR1 & CR2 (CR7/CR13)On AMX1A4 Panel4. Bad 1KHZ Board5. Are The Tap Relays Energizing?6. Is “Stop Cap” At J4-11 (1 Khz Board)Approximately 80 VDC?

ERROR 45D1. Bad FIL/KVP Board2. FIL SHORTED (Check J2-25 On FIL/KVP Board)3. Bad CPU Board

ERROR 45E1. Check For 2 KHZ Phase 1 & 2 Signals At J2-17 & 19 OfFIL/KVP Board2. Check For Continuity Between J5 Plug On FIL/KVP Board And

Filament Terminals On HV Xformer3. Check For Open Or Shorted Tube Small Filament – Is TheSmall Spot Lit During Prep?A 6V Battery Voltage Can Be Applied Directly To The Filament ToSee 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 OfFIL/KVP Board6. Is The XRT From Another Vendor? (Must Have InternalResistor In Series With Filament)7. Bad High Voltage Divider (H/V Bleeder)8. FIL SHORTED (Check J2-25 On FIL/KVP Board)

ERROR 45F1. Check For Correct Wiring Between J5 Plug On FIL/KVP BoardAnd HV Xformer2. Check Spark Gaps On H/V Xformer (0.010”)3. Check That HV Cables Are Not Reversed4. Check Wiring Of J4 Plug To FIL/KVP Board5. Check That U18 On FIL/KVP Board Is #1489--NOT #14C896. 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 [HVTransformer] = Approximately 17 VAC @

52 KVP With PREP)9. Loose J3 On Filter Board

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ERROR 4621. Check Wires To Q3 Block On AMX1A4 Panel For LooseConnections2. 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 1Bad Cell Up To Full Pack4. Could Be Faulty H/V Bleeder5. Charger Board Failure Or Fuse F4 Open6. Errors 462 And 466 - Tripping Breaker With ExposuresAbove 48 KVP = Replace

H/V Transformer7. Error 462 On Exposures >70 KVP And Error 439 <70 KVP =Excessive Exposure

Time (> Closed Loop Resistance?) = Re-Calibrate Unit8. ERROR 462 During Cal. With NO Exposure Termination(Counts Actual Time)—In

Check-Sum Bypass Mode, The Exposure TerminatesNormally (Uses Time Selection

ONLY). Solution: SPARK GAP SHORTED.9. FIL/KVP Board J3 Pins 3 And 4 (Jumper Has HighResistance)10. Loose Battery Connections

ERROR 4631. Bad CPU2. Bad FIL/KVP Board3. Error 463 And 469 - Loose Connection On/Or Bad 1KHZ Board4. Safety Contactor Contact Issue

ERROR 4651. Check J2 Plug From T2 On AMX1A4 Panel/Clean J3 On FIL/KVPBoard2. FIL/KVP Board May Be Defective3. Batteries May Be Soft. Perform The Load Test.

BATTERY VOLTAGE MUST BE 113 VOLTS OR LESS TO DO LOADTEST!

DO NOT CHARGE BATTERIES BEFORE LOAD TEST!!a. Connect Oscilloscope From Circuit Breaker To Ground

- Use Sample Modeb. Make Exposures At 80, 100 KVP And 125 KVP, About 10

MASc. Read Battery Voltage And Average The Ripple At The

Bottomd. Battery Voltage Should Drop About 13 VDC +/-10% At

80 KVPe. Battery Voltage Should Drop About 16 VDC +/-10% At100KVPf. Battery Voltage Should Drop About 17 VDC +/-10% At125KVP4. If Batteries Pass Load Test, Unit May RequireRecalibration Of MAS, KVP,

Taps And Filament Current Tables5. If Batteries Do Not Pass The Load Test, You Get ToReplace Them!!

ERROR 4661. During Calibration, Take Unit Out Of Calibration AndReset CPU Then

Restart Generator Calibration (MAS, KVP, Taps, AndFilament Current Table)2. Check Spark Gaps On HV Xformer For A 0.010” Setting3. Check For Miswired Or Open Plug J2 From T2 On AMX1A4Panel

To HV Xformer MA+ & MA-4. Check For HV Xformer Spits5. Check For XRT HV Spits6. CPU Board May Be Defective7. Insulate (On Older Units) Capacitor C5 From It’sRetaining Clamp (Ref. To S/N 3265)

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ERROR 4671. Capacitor C5 Leaky (Does Not Apply To AMX-4+ Units)

2. Bad CPU3. Bad Cell(s)4. Bad FIL/KVP Board5. Unit Calibration Required (If In The“CHECKSUM-BYPASS” Mode)6. H/V Cable Open/Shorted Internally Or Poor PinSpread On H/V Candles

ERROR 469During Calibration:

1. Check If K7 Contactor On AMX1A4 Panel Pulls In -Check For Welded Contacts

2. Check That No Wires Or Side Cover InsulationInterfere With K1 Thru K6

Contactors On AMX1A4 Panel3. Check For Bad Crimp On Red Lead To AA Of Q3 On

AMX1A4 Panel4. Check For Defective Jumper Harness From J3 On 1 KHZ

Board To J7 On FIL/KVP Board5. HV Cathode Cable May Be Shorted6. FIL/KVP Board May Be Defective7. 1 KHZ Board May Be Defective8. 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 469Error Alone - Usually At

Higher KVP’s (KVP Waveform Will Be Low On The FrontEnd, Even In Check-Sum

Bypass Mode)17. Bad High Voltage Transformer18. C5 Leaky Or Bad19. 439 And 469 ERRORS – Check ALL Leads That Exit TheAMX1A4T1

Autotransformer --- Look For Pinched Or Shorted LeadsTo Ground 20. Check Pin Spread On Both Ends Of Cathode Cable (AlsoCheck 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 XRT3. Possible CPU Board Failure

4. Hand Switch Or Coil Cord Failure5. Soft Batteries/Cells 6. Tap Relay Contact Bounce - Replace 1 KHZ Board

7. Side Cover Fish Paper Insulation Impacting TapRelays When Cover Installed

8. Bad Handswitch 9. Bad Rotor Board

10. Check Stator Lead(s) Continuity11. Refer Also To Faults “During Calibration” Above

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LOSS OF CAL DATA (NVRAM)1. Static Problems - Refer To ERROR 437, Step 4.2. LVLE Problem (+24 VDC)—Refer To FMI-10359 For

Original Supplies3. +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-off7. Metal Shavings (fine powder) On CPU Board8. Replace “old” Style LVLE With T3497L9. Exercise Collimator Blades And Flex Cable At Rear OfCollimator While “Scoping” The +24 Volt Pin On The Output Of The LVLE

LOSS OF LVLE1. Bad Tube Park Latch (Old Style) = Shorted Switch

Internal. Get New Hall Effect Latch Switch Assy. Kit 46-316198G12. Bad Display Board Which Loads Down The LVLE Through

Display Controller Board

BREAKER TRIPPING PROBLEMS1. FIL/KVP Board Sees >15 KVP Above Demand2. Input Power To Charger Board Stable?3. Bad/Loose Connections On LVLE4. Bad Connection J1 On CPU5. Bad Connection J6 On FIL/KVP Board6. Batteries Below 110 VDC Or Poor Regulation (Run The

Load Test)7. J2 1 KHZ Board -- +24 Volt Loss8. 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-BreakerTrips?)18. During Calibration - Verify H/V Candles Greased AndPins Spread Properly19. During Calibration - At Higher KVP’s (>120 KVP) -Re-Load Defaults And Try

Starting The Calibration With 112.5 VDC On The BatteryPack Instead Of 113.5 VDC

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Additional Notes:

1. -- Problem

CANNOT Calibrate KVP’s (Gets Hung), FIL TAPS or FIL CURRENTTABLE (LOW FILAMENT ERROR) Etc., Or Load Data In Data Base Access Properly,Can’t Enter Calibration Mode OR Getting False Error Codes Displayed, AfterChanging Out The CPU Board (T3497H/46-264974G2).

-- Solution

Remove The TWO NOVRAM Chips (U54 & U107) On The Newer CPU BoardAnd

Replace Them With The TWO NOVRAM Chips From TheOlder 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 (OnBoot-Up, Message Is “RELEASE

PREP” - This Usually Indicates A Bad Hand-Switch

Assembly.

3. Open Filament In XRT (ERROR 45F) During Prep. BadFIL/KVP Board (Q170, Q160

Or Q173 Shorted—Inverter Running At Maximum Output. CQA 964232.

4. Display Issues—Trashy, Scrolling Or No DisplayDuring 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 LVLEAppears OK, This Could Also Could Be

Caused By A Bad Display (Kit 2139946) Or DisplayController (46-264982G1). Also

Could Be Possible Charger Board Failure—Tap On RelaysTo See If Display Failure Occurs.

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 50-60Amps) - Also Replace AMX1A4R7

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7. -- Problem

KVP’s High In Applications And During And During KVPCalibration. In The “Check- Sum Bypass Mode” (With Defaults Loaded), Tap Relays (80 KVPSelected) 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 4-5Msec. (During Calibration

And Applications), And Then Drops To ProperSelected KVP Value. NO System Error

Codes Displayed During Applications Other ThanOccasional “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 VoltagePower 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-washersImpinge On The +40 VDC Bus On

The Display Board (46-232832G1). The +40 VDC Bus Is TooClose To The Retaining

Nut Lock-washers—Shorts Out The +40 VDC Bus When TheESD Kit Ground Cables

Are Added. Re-Position Existing MountingScrews/Lock-washers. CQA 972174

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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-OrientKey On J8 (FIL/KVP Board

Side). CQA 972175

12. -- Problem

Release Handle Error - When Enabling And Pushing Handle ForwardOR Back SIMULTANEOUSLY

-- Solution

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

13. -- Problem

Both Large And Small Filaments Are LitSimultaneously (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 DuringCharge Mode Or During Driving Or During Idle Mode

-- Solution

Replace The LVLE Power Supply (T3497L)

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15. -- Problem 469 Error With The Following Resultant Waveform

-- Solution

Bad Tap Relay(s) – CONTACTS NOT FULLYActuating (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 ToObtain A “normal” KVP Waveform

17. -- Problem

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

-- Solution

Bad Hand-Switch (New Style) - Remove J8 On CPU (Controller Board)To Verify +24 Volt Supply Returns 18. -- Problem

“BATTERY TOO LOW” Message

-- Solution

This Might Indicate Possible Cell(s) Failure. There Are 3 WaysTo Test Cells/Battery Pack: 1] Monitor Each Cell under A LiteLoad Condition—Rotor Only; 2] Monitor EachCell Under A Heavy Load---80 KVP @ 125 MÁS. Cell ReadingsShould Be Within .2VDC Of Each Other (Ex. 11.9 vdc To 12.1 vdc). There Should Be113 VDC AcrossThe Battery Pack Prior To Running Tests 1 & 2 Above. 3] ReferAlso To ERROR 465,For The Battery Pack Load Test.

Secondly, This Could Indicate A

“Synchronization” Issue — Refer To Section 14, LastPage In Direction 46-017207 AMX-4 Proprietary

Diagnostics – Run This Test Only OnUnits With 46-329xxxGx Firmware. (The Voltmeter

Calibration Has To Be Accurate InOrder To Run This Test Successfully). This

“Sychronization” Routine Should Always BeRun – 1) At The End Of Any Major Unit

Calibration – 2) Upon Replacement Of TheCharger Board – 3) If The Unit Was Charged

Outside Of Normal Applications Mode(Check Sum Bypass Or Diagnostics Mode). Refer

Also To Problem 24, Below.

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19. -- Problem

Display Goes Out On Unit Intermittently

-- Solution

Check The 3 Pins On J1 (Feeds Battery Voltage To TheLVLE 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 BatteryTerminal Connections 21. -- PROBLEM

During “CAL CHARGER” - Unit Works Up To 1.2Volts - When Value Is Entered, Charger Shuts Off

And External Voltmeter Goes To Zero, Then You GetAn “X-RAY BYTE LIMIT”.

-- Solution

Bad CPU Board

22. -- PROBLEM

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

-- SOLUTION

Bad Display Board

23. -- PROBLEM

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

-- SOLUTION

In Applications Mode, This Message Indicates That One CalibrationUnit Has Exceeded It’s Proper Range (Cannot Tell Which One). The Calibration Philosophy Is Such That Each Cal Unit (In TheGenerator Calibration) Depends On The Prior Cal Unit That WasAccomplished (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, UnderThe “STATUS MESSAGES” Section.

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24. -- PROBLEM

“BATTERY TOO HIGH” Message

-- SOLUTION

This Usually Indicates That The Unit Was AttemptedTo Be Operated (Rotor And

Exposure) Too Soon After A Charging Cycle. InNormal Applications, When The Unit Is

Unplugged, It is Normally Driven To AnotherLocation (More Than 50 Feet), Thus Giving

The Batteries Time To “Level Off”.

25. -- PROBLEM