Rap 28 Power Supply - Xerox DocuPrint N2025 Service Manual

RAP 28 Power Supply

Procedure
Switch the printer power off. Disconnect the power cord. Remove the Lower Rear Cover (REP
1.7). Disconnect the following from the LVPS:
• P/J161 (Print Engine Controller PWB)(REP 8.5)
• P/J163 (System Controller PWB)(REP 8.1)
• P/J164 (Main Motor)(REP 6.2)
• P/J165 (Main Fan)(REP 8.4)
• P/J166 (LVPS Fan)(REP 8.7)
• P/J168 (5VDC Power Supply)(REP 8.9)
Connect the power cord. Switch the printer power on and measure the voltages listed in Table
1 on the LVPS.
Table 1 LVPS
Red Lead Black Lead
P/J161 pin 10 Frame Ground
P/J161 pin 11 Frame Ground
P/J161 pin 3 Frame Ground
All voltages are correct.
Y N
Replace the LVPS (REP 8.6).
Switch the printer power off. Reconnect P/J161 to the LVPS. Switch the printer power on and
measure the voltages listed in Table 1. All the voltages are correct
Y N
Switch the printer power off. Remove the Left Side Cover (REP 1.1) and the Print Engine
Controller PWB Cover (REP 8.5). Reconnect all the P/Js to the LVPS. Disconnect the fol-
lowing from the Print Engine Controller PWB:
• P/J11 (Laser) (RAP 30)
• P/J21 (Print Cartridge Sensor) (RAP 13)
• P/J14 (Toner Sensor) (RAP 42)
• P/J12 (Tray 1 Feed head components/Tray 1 Low Paper Sensor) (RAP 21)
• P/J22 (Registration Clutch) (RAP 38)
• P/J13 (Feeder 2/3) (PL 11.1)
• P/J17 (Fuser Control PWB / Fuser) (RAP 31)
• P/J19 (Duplex Assembly /OCT) (PL 13.1)
• P/J18 (HVPS/Registration Sensor) (RAP 32)
• P/J20 (Tray 1 Size Sensor/MBF Home Sensor) (RAP 22)
Switch the printer power on and measure the voltages listed in Table 1. All voltages are
correct.
Y N
Replace the Print Engine Controller PWB (REP 8.5).
Switch the printer power off. Reconnect one of the disconnected plugs. Switch the printer
power on. Measure the voltages listed in Table 1. All the voltages are correct.
A
Status Indicator Repair Analysis Procedures
RAP 28
Voltage
+5.0VDC
+3.3VDC
+24.0VDC
02/2000
2-30
A
Y N
Replace the component just connected to the Print Engine Controller PWB.
Repeat the step with the next disconnected plug.
Switch the printer power off. Reconnect one of the disconnected plugs. Switch the printer
power on. Measure the voltages listed in Table 1. All the voltages are correct.
Y N
Replace the component just connected to the LVPS.
Repeat the step with the next disconnected plug.
Initial Issue
DocuPrint N2025/N2825