amx 4 error

ERROR 469
During Calibration:
Check If K7 Contactor On AMX1A4 Panel Pulls In - Check For Welded Contacts
Check That No Wires Or Side Cover Insulation Interfere With K1 Thru K6 Contactors On AMX1A4 Panel
Check For Bad Crimp On Red Lead To AA Of Q3 On AMX1A4 Panel Check For Defective Jumper Harness From J3 On 1 KHZ Board To J7 On FIL/KVP Board
HV Cathode Cable May Be Shorted
FIL/KVP Board May Be Defective
1 KHZ Board May Be Defective
Check Spark Gaps On HV Xformer For 0.010”
Check For Location Of Black & White Leads On Q3 Block On AMX1A4 Panel
Q3 Block May Be Defective
Check If EXP START CMND Is Shaky (This Is Like 439 During Applications).
EXP START And SCR HI/LO Are Single Pulses
“XRAY ON” Going Low = Bad Tap Relay Contact(s)
Bad Handswitch
Bad Rotor Board - Also Check Stator Lead(s) For Continuity
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)
Bad High Voltage Transformer
C5 Leaky Or Bad

439 And 469 ERRORS – Check ALL Leads That Exit The AMX1A4T1
Autotransformer --- Look For Pinched Or Shorted Leads To Ground
Check Pin Spread On Both Ends Of Cathode Cable (Also Check For Proper Amount Of Grease In High Voltage Cable Wells)

469 is (The X-ray ON status went low during exposure.)

Recommended Action:

Check X-RAY ON Signal of the Critical Status port on sheet 3 location D 8 of the CPU schematic
Check circuitry related to this circuit (i.e. does the signal oscillate during the exposure when it should be a solid high?)

During Calibration:

Does the start command get to the inverter?
Does the safty contactor pull in?
Is high voltage produced? If so, is the resulting kvp what was selected?
Do the correct taps pull in?
Check KV feedback signal. It should look like the signal from the High Voltage Divider.
Error Code 69 in Hex in the error list.

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
Cable

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