Rap 43 Hvps Assembly; Rap 44 Electrical Noise - Xerox DocuPrint N2125 Service Manual

RAP 43 HVPS Assembly

Procedure
Open the Front Cover. Remove the Print Cartridge. Inspect all contacts on the Transport Chute
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 Transport Chute Assembly
essary.
Cheat the Front Cover Interlock Switch. Enter Diagnostics and select Component Test. Scroll to
each of the high voltage tests (Table 1). Measure the voltage between the contact listed and
frame ground. Press the Enter Key.
Table 1 High Voltage Power Supply Readings
High Voltage Test Contact
Charge Roll DC Rear Transport Chute Pin Contact -425 ±40 VDC
Charge Roll AC Rear Transport Chute Pin Contact 1000 ± 100 VAC
Dev Bias DC Front Transport Chute Pin Contact +7.3 ± 3 VDC
Dev Bias AC Front Transport Chute Pin Contact 555 ± 55 VAC
BTR - BTR Roll Bushing
BTR + BTR Roll Bushing
Detack Saw Detack Saw
At least one of the voltages is correct.
Y N
Switch the printer power off. Remove the Left Interface Cover
1.2), and the Left Plate Assembly
Engine Controller PWB, check the voltage between P/J26 pin 2 and frame ground. The
voltage is +24VDC.
Y N
Replace the Print Engine Controller PWB
Replace the HVPS (REP 9.6).
All the voltages are correct.
Y N
Replace the Print Engine Controller PWB
Switch. Enter Diagnostics and select Component Test. Scroll to each of the high voltage
tests (Table 1). Measure the voltage between the contact listed and frame ground. Press
the Enter Key. All the voltages are correct.
Y N
Check the Transport Chute Assembly for proper installation. Check the HVPS har-
ness for proper connection and for damage. If everything is OK, Replace the HVPS
(REP 9.6)
Problem Solved.
Problem solved.
Initial Issue
DocuPrint N2125
(REP 6.1) or the Print Cartridge (PL
Reading
-81 ± 8 VDC
0 VDC
-930 ± 100 VDC
(REP 1.1), Left Cover
(REP 1.11). Switch the printer power on. On the Print
(REP 9.3).
(REP 9.3). Cheat the Front Cover Interlock

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.
8.1) as nec- Y N
Problem solved.
Check the AC wall outlet and power cord (see
and grounded.
Y N
Inform the customer of insufficient voltage or improper wiring. A licensed electrician must
correct the wiring.
Open the Front Cover. Remove the Print Cartridge. Inspect all contacts on the Transport Chute
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 Transport Chute Assembly
essary.
Remove the Left Interface Cover
to the Main Power Connector. The cable is grounded properly.
Y N
Attach the grounding screw properly.
Replace the Print Cartridge
(REP
Y N
Problem solved.
Remove the Fuser Assembly
cables of the Heater Rod. The cables are attached properly.
Y N
Attach the cables properly or replace the Fuser Assembly
Disconnect the HVPS (P/J26) from the Print Engine Controller PWB. Run 20 Test Prints (the
prints will be blank). The Test Prints run normally.
Y N
Replace the Print Engine Controller PWB
Y N
Problem solved.
Inspect all of the grounds in the printer. All the grounds are securely connected.
Y N
Repair the bad grounds.
Replace the following components one at a time until the cause of the problem is found.
• HVPS PWB Assembly
• Print Engine Controller PWB
A
02/2000
2-39
RAP 1). The AC wall outlet is correctly wired
(REP 6.1) or the Print Cartridge
(REP 1.1). Inspect the grounding screw and wire connected
(PL 8.1). The Electrical Noise problem is still present.
(REP 6.2). Remove the end covers (see
(REP
(REP 9.3). The problem is still present.
(REP 9.6).
(REP 9.3).
Status Indicator Repair Analysis Procedures
RAP 43 , RAP 44
Electrical
(PL 8.1) as nec-
REP 6.9). Inspect the
6.2).