Rap 26 Inoperative Keypad; Rap 27 Erratic Printer Operation - Xerox DocuPrint N2025 Service Manual

RAP 26 Inoperative Keypad

Control Panel is not operative.
Procedure
Enter Diagnostics and select the Component Test. Scroll to Sensor Input test and press Enter
[4]. The printer enters the Diagnostic Mode to the Sensor Input Level.
Y N
Disconnect P/J18 on the System Controller PWB. Measure the voltages listed in Table 1
between P18 on the System Controller PWB and frame ground.
Table 1 Keypad
Pin
1
2
3
4
5
6
7
8
All the voltages are correct.
Y N
Replace the System Controller PWB (REP 8.1).
Disconnect P/J421 from the Control Panel. Measure continuity on all wires between P/
J421 and P/J18. All checks are good.
Y N
Replace the Wiring Harness (PL 9.1).
Replace the Control Panel Assembly (PL 1.1).
Keypad numbers (1-7) increment the counter. Keypad number [4] enters the test and (0)
exits the test.
Y N
Replace the Control Panel Assembly (PL 1.1).
Replace the System Controller PWB (REP 8.1).
Initial Issue
DocuPrint N2025/N2825
Voltage
3.3 VDC
0 VDC
1.3 VDC
0 VDC
3.3 VDC
1.3 VDC
3.3 VDC
0 VDC

RAP 27 Erratic Printer Operation

Procedure
Enter diagnostics and select Test Print. Run 20 test prints. The printer generates test prints.
Y N
Switch the printer power off. Disconnect P/J168 from the LVPS Assembly. Switch the Main
Power on. Check the voltage between P161 pin 10 and frame ground. The
+5.0VDC.
Y N
Go to RAP 28.
Switch the printer power off. Reconnect P/J168 to the LVPS Assembly. Enter diagnostics
and select Test Print. Run 20 test prints. The printer RESETS while generating test
prints.
Y N
Replace the Print Engine Controller PWB (REP 8.5). The problem still appears.
Y N
Problem solved.
Replace the Interface Cable connecting host to printer. Run test prints from the host
computer. The problem still appears.
Y N
Problem solved.
Notify customer the cause of the trouble seems to be a communication problem
between the host computer and the printer. The customer should contact Customer
Support.
Go to RAP 44.
The printer RESETS while generating test prints.
Y N
Replace the Print Engine Controller PWB (REP 8.5). The problem still appears.
Y N
Problem solved.
Notify customer the cause of the trouble seems to be a communication problem between
the host computer and the printer. The customer should contact Customer Support.
Go to RAP 44.
02/2000
2-29
voltage
Status Indicator Repair Analysis Procedures
RAP 26, RAP 27
is