Xerox DocuPrint N24 Service Manual page 1030

10 Measure the voltage between P/J 456-B4 and FG (WIR 8.6.4.2.1 Model 1 Laser Assembly
Wiring or WIR 8.6.4.2.2 Model 2 Laser Assembly Wiring) on the Printer Engine Controller PWB
as the printer powers up. The voltage should go from 5.1V to 1.2V every time the AC Driver
Relay cycles and then stay at 1.2V when the Console displays "Ready".
Y N
|
Replace the Printer Engine Controller PWB (REP 4.10.6).
11 Measure the voltage between P/J 456-B1 and FG (WIR 8.6.4.2.1 Model 1 Laser Assembly
Wiring or WIR 8.6.4.2.2 Model 2 Laser Assembly Wiring) on the Printer Engine Controller PWB.
There is +5VDC between P/J 456-B1 and FG.
Y N
|
Replace the Printer Engine Controller PWB (REP 4.10.6).
12 Measure the voltage between P/J 407-1 and FG (WIR 8.6.4.2.1 Model 1 Laser Assembly Wiring
or WIR 8.6.4.2.2 Model 2 Laser Assembly Wiring) on the Laser Diode Drive PWB when the
correct EP Cartridge is installed and the EP Cartridge Interlock Switch is closed. There is +5VDC
between P/J 407-1 and FG.
Y N
|
Switch off printer main power. Check the continuity of the wiring between P/J 456 and P/J
407 and the EP Cartidge Interlock Switch (WIR 8.6.4.2.1 - Model 1 or WIR 8.6.4.2.2 -
Model 2). If OK, call for support. Possible problem is ACOM MICR Sensor(s) or Keylock
Switch.
13 Replace the Laser Assembly (REP 4.6).
14 Measure the voltage between P/J 456-A7 and FG (6.3.6) on the Printer Engine Controller PWB.
There is +24VDC between P/J456-A7 and FG.
Y N
|
Replace the Printer Engine Controller PWB (REP 4.10.6).
15 Check wiring between P/J 456 and P/J 240 (6.3.6). If OK, replace the Laser Assembly (REP 4.6).
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