Xerox 5760 Color Copier has fault 03-...

On these codes, on the back of the machine, unplug the harness that goes to all the boards on each one of them. Unplug and replug them all.
Do this one at a time.
Unplug them on the power supplies and the vertical high voltage powersupply.
Be very careful when pulling off the plugs, some are hard to release the snap that holds the plug to the boards.
This harness has about 5 large wires on them, they are the DC Wires.
If this happens again, the vertical power supply may need replacing or and even both Low voltage power supply and High voltage power supply at the same time.
Also, this problem may also be associated to NVM corruption on the main board. The battery on the main board has a life for about 10 years. The NVM may be corrutpted and changed the values, so the machine may not start up correctly.
If replacing the NVM Battery(chip) the large thick one, the date needs to be checked on the battery, and the right NVM( chip) needs to be installed on the Right Main board, along with the Right eproms. They need to be matched before replacing.
Even if the chip is replaced, the NVM values need to be checked and set to the right configuration to the machine model being used. There are many areas to be checked and reset to the right configuration and if it is not done properly the machine will not work, giving constant errors.
This is involved technical service and if the machine is really needed, A Xerox service call is needed to do the repairs on this model.

Xerox 5350, 5352, 5760 Code Description 00-009, 030, 031, 032, 033 A door was opened while paper was being fed 00-047 Paper in duplex 00-1 Auditron 00-2 Diagnostic error 00-3 Faults error 00-4 Ric error 00-5 Job manager system error 00-6 LLM interface 00-7 Standby error 00-8 Communications error 00-9 Xerographic error 01-300 Front interlock 01-310 Right upper interlock 01-315 Left upper interlock 01-320 Left lower interlock 01-325 Fuser interlock 02-910 Key counter missing 02-920 Wrong combination of accessories 03-302, 321, 322, 326, 327 LLM to ISIL communications problems 03-328 IOT communications problem with duplex or tray 4 03-330 IOT communications problems with HCF 03-335, 336 LLM communications problems with edit 03-340 NVM memory 03-341-347 Communications problems between IOT and sorter 03-350-354 Communications problem with LLM and user interface 03-363, 364 Communications problem between LLM & optics 03-370-03-373 Communications problem between LLM & DADF 03-380, 384 03-416-422 RAM memory problem 03-424, 426 NVM memory problem 03-430, 432 Billing problem 03-439 GRAIB communications problem 03-440 RIC communications problem 03-441 RIC NVM problem 03-442 Modem 03-443-458 RIC problems 03-460 Serial communications processor problem 04-300 Main motor or drive problem 05-100-108 DADF registration sensor 05-110 DADF exit sensor 05-115, 120 DADF jams 05-305 DADF document drive 05-310, 312 DADF document sensor 05-316 DADF registration sensor jam 05-325 DADF exit sensor 05-335, 341, 345 DADF interlock switches 06-300-310 Scan problems 06-315 Scan drive 06-320A, 320B, 320C, 325 Scan problem 06-330 Lens drive 06-340 Exposure control problem 06-342 LLM CPU problem 06-344-350 Exposure cvontrol problem 06-352 IOT CPU problem 07-300, 315, 330, 345 Tray faults 07-360-370 HCF problems 07-375, 380A, 380B Duplex problems 08-100-110 Feed problems. Lead edge of copy paper is late getting to feed sensor of tray 1 08-115-162 Feed problem. Lead edge of copy paper is late getting to registration sensor 08-165 Paper jam at registration sensor 08-310-370 Paper at a sensor when power is turned on 08-330 DADF nudger sensor 08-380 Registration side to side problem with home position 08-390 Nip 09-300 Copy cartridge finished (drum unit) 09-310 Add black toner Add color toner 09-320 Add color toner 09-330 Wrong copy cartridge (wrong drum unit) 09-340 Drum cartridge not installed properly 09-350 Waste toner full 100 A fault has occurred 10-100 Exit jam 10-105 Exit jam 10-110 Vertical sensor jam 10-120, 122, 125 Duplex jam 10-150, 155 Too much or not enough paper in duplex tray 10-300 Fuser thermistor 10-302 Low fuser temperature 10-304 Bad fuser temp 10-308 High fuser temperature or open thermistor 10-310 High fuser temperature 10-312 Fuser not up to temperature after energy save 10-314 Fuser problem 10-320 Fuser web finished 10-330, 335, 340 Exit switch, vertical sensor switch actuated when power is turned on 11-100-116 Sorter jam 11-150-176 Sorter auto stapler jam 11-310, 314, 316 Sorter interlock 11-325A,B,C,D,E,F,G Sorter index 11-352, 354, 356 Sorter auto stapler interlocks 11-365A,B,C,D,E Sorter auto stapler bin 11-370,371,372A,373A,373B,374 Sorter auto stapler staple failure, staple home problem or tamper home problem 11-385A,385B,390A,B,C,D,E,396A Sorter auto stapler staple failure, staple home problem or tamper home problem 301 Fuser web must be replaced 302 Copy cartridge (drum unit) must be replaced 501 Tray 1 must be rebuilt 502 Tray 2 must be rebuilt 503 Tray 3 must be rebuilt 504 Tray 4 must be rebuilt 505 HCF must be rebuilt 506 Bypass must be rebuilt 507 Duplex unit must be rebuilt 508 Replace black developer 509 Replace red developer 510 Replace green developer 512 Replace brown developer 513 Copy cartridge (drum unit) will need replacing soon 514 Fuser web will need replacing soon 515 DADF belt should be replaced 516 DADF feed rollers should be replaced 517 Replace exposure lamp 518 Replace suction filter 519 Replace ozone filter 520 Replace optics filter 521 Replace particle filter 522 Replace upper fuser roller 523 Replace fuser pawls 524 Replace pressure roller 525 Replace pressure roller pawls 900-905 Key operator calls