U8-1 Billing Counter Defect; U9-0 Hvps Fail - Xerox WorkCentre 5020 Service Documentation

U8-1 Billing Counter Defect

BSD-Reference: CH3.2 (Figure 2)
Explanation
• An illegal Billing Counter value was detected.
• Or, the AIOC PWB failed to read the Billing Counter.
Procedure
TBD
Status Indicator RAPS
U8-1, U9-0

U9-0 HVPS Fail

BSD-Reference: CH9.1 (Figure 1)
Explanation
A 500 ms cycle of HVPS#ERR=High was detected twice in a row.
Procedure
Close the Left Hand Cover and the Front Cover. Make sure that the Drum Cartridge and the
Transfer Corotron are properly seated. Measure the voltages between P406-2 ( P/J406) (+)/
P406-4(+)/P406-5(+) on the AIOC PWB and ground (-). The voltages are approximately
+5VDC.
Y N
Replace the AIOC PWB (PL 8.1) (REP 8.1.1) and the HVPS (PL 8.2) (REP 8.2.1) in that
order.
Execute diagnostics [09-04 HVPS ON (Low Voltage)]. (How to Enter the Diagnostic Mode)
The voltages at P406-2 ( P/J406) (+)/P406-4 (+)/P406-5 (+) become 0.
Y N
Replace the AIOC PWB (PL 8.1) (REP 8.1.1).
Replace the HVPS (PL 8.2) (REP 8.2.1). The problem is solved.
Y N
Measure the voltage between P406-1 ( P/J406) (+) on the AIOC PWB and ground (-).
The voltage is approximately +5VDC.
Y N
Check between J520-1 ( P/J520) and J406-1 ( P/J406) on the HVPS PWB for a
short circuit.
If there is no short, replace the HVPS (PL 8.2) (REP 8.2.1).
Replace the AIOC PWB (PL 8.1) (REP 8.1.1).
Completed
July, 2007
2-32
Initial Issue
WorkCentre 5020