Rap 44 Electrical Noise - Xerox DocuPrint N2025 Service Manual

A B
Check the wiring connections and continuity between the charge contact on the Right
Side Guide and P186 on the HVPS. Repair or replace as necessary. If wiring is ok,
replace the HVPS (REP 8.2).
Scroll to Charge Roll DC. Measure the voltage between the Right Side Guide Charge Terminal
and frame ground, press Enter. The reading is 485 VDC.
Y N
Replace the HVPS (REP 8.2).
Scroll to Dev Bias AC. Measure the voltage between the Right Side Guide Developer Bias Ter-
minal (connector nearest the back of the machine) and frame ground, press Enter. The volt-
age reading is 620 VAC.
Y N
Replace the HVPS PWB Assembly (REP 8.2).
Remove the Right Print Cartridge Guide Assembly (REP 7.2). Remove the screws that secure
the Developer Wire Assembly (PL 8.1) and P/J186 of the Xero Wire Assembly (PL 8.1). Dis-
connect P/J187 and P/J186 from the HVPS Assembly. Check the continuity between both ends
of the Developer Wire Assembly and Xero Wire Assembly. There is continuity respectively
through the Developer Wire Assembly and Xero Wire Assembly.
Y N
Replace the Developer Wire Assembly and/or Xero Wire Assembly (PL 8.1).
Replace the Print Engine Controller PWB (REP 8.5). The problem still appears.
Y N
Problem solved.
Replace the HVPS PWB Assembly (REP 8.2).
Initial Issue
DocuPrint N2025/N2825

RAP 44 Electrical Noise

Procedure
Check if there is other electrical equipment, such as electrical generators, radio transmitters, or
devices using electrical motors, within ten feet of the printer. Shut off the other electrical equip-
ment, or relocate the printer at least twenty feet away from other devices. The
Noise problem is still present.
Y N
Problem solved.
Check the AC wall outlet and power cord (see RAP 1). The AC wall outlet is correctly wired
and grounded.
Y N
Inform the customer of insufficient voltage or improper wiring. A licensed electrician must
correct the wiring.
Open the Top Cover. Remove the Print Cartridge. Inspect all contacts on the Right Print Car-
tridge Guide Assembly and the terminals on the Print Cartridge. The terminals are in good
condition and contacting properly when the cartridge is installed.
Y N
Replace the Right Print Cartridge Guide Assembly (REP 7.2) or the Print Cartridge (PL
8.1) as necessary.
Remove the Lower Rear Cover (REP 1.7). Inspect the grounding screw for the cable connected
to the Main Power Switch. The cable is grounded properly.
Y N
Attach the grounding screw properly.
Replace the Print Cartridge (PL 8.1). The Electrical Noise problem is still present.
Y N
Problem solved.
Remove the Print Cartridge. Remove the Right Print Cartridge Guide Assembly (REP 7.2).
Inspect the Seal Guide on the rear end of the Right Print Cartridge Guide Assembly. The Seal
Guide is intact, free of contamination, obstructions, and deformities.
Y N
Clean the Seal Guide or replace the Right Print Cartridge Guide Assembly (REP 7.2).
Remove the Paper Transport Assembly (REP 4.1). Check the continuity of all the wires in the
Paper Transport Assembly. There is continuity on all the wires.
Y N
Replace the Paper Transport Assembly (REP 4.1).
Inspect the Developer Wire Assembly. The wires are connected properly.
Y N
Connect the wires properly.
Inspect the cables of P174-1 and P174-4 and the right end of the Heater Rod. The cables are
attached properly.
Y N
Attach the cables properly or replace the Fuser Assembly (REP 5.1).
A
02/2000
2-43
Electrical
Status Indicator Repair Analysis Procedures
RAP 43, RAP 44