Rap 3 Dc Power Loading - Xerox DocuPrint N2025 Service Manual

RAP 3 DC Power Loading

Initial Actions
Perform RAP 2 DC Power before starting this RAP.
WARNING
AC input voltages can be lethal. Use extreme care while checking the voltages on the
LVPS.
Disconnect the power cord while checking the continuity of fuses and while removing or
reinstalling the components.
Procedure
Switch the printer power off. Remove the Lower Rear Cover (REP 1.7). Disconnect the follow-
ing from the LVPS:
• P/J161 (Print Engine Controller PWB)
• P/J163 (System Controller PWB)
• P/J164 (Main Motor)
• P/J165 (Main Fan)
• P/J166 (LVPS Fan)
• P/J168 (5VDC Power Supply)
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 and the Print Engine Controller
PWB Cover. Reconnect all the P/Js to the LVPS. Disconnect the following from the Print
Engine Controller PWB:
• P/J11 (Laser)
• P/J21 (Print Cartridge Sensor)
• P/J14 (Toner Sensor)
• P/J12 (Tray 1 Feed head components/Tray 1 Low Paper Sensor)
• P/J22 (Registration Clutch)
• P/J13 (Feeder 2/3)
• P/J17 (Fuser Control PWB / Fuser)
• P/J19 (Duplex Assembly/OCT)
• P/J18 (HVPS/Registration Sensor)
A
Initial Issue
DocuPrint N2025/N2825
Voltage
+5.0VDC
+3.3VDC
+24.0VDC
02/2000
2-13
A
• P/J20 (Tray 1 Size Sensor/MBF Home Sensor)
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.
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.
Status Indicator Repair Analysis Procedures
RAP 3