02/2000
2-39
DocuPrint N2125
RAP 43 , RAP 44
Status Indicator Repair Analysis Procedures
Initial Issue
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 (
) or the Print Cartridge (
) as nec-
essary.
Cheat the Front Cover Interlock Switch. Enter Diagnostics and select Component Test. Scroll to
each of the high voltage tests (
). Measure the voltage between the contact listed and
frame ground. Press the Enter Key.
At least one of the voltages is correct.
Y
N
Switch the printer power off. Remove the Left Interface Cover (
), Left Cover (
), and the Left Plate Assembly (
). Switch the printer power on. On the Print
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 (
).
All the voltages are correct.
Y
N
Replace the Print Engine Controller PWB (
). Cheat the Front Cover Interlock
Switch. Enter Diagnostics and select Component Test. Scroll to each of the high voltage
tests (
). 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
(
)
Problem Solved.
Problem solved.
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 Electrical
Noise problem is still present.
Y
N
Problem solved.
Check the AC wall outlet and power cord (see
). 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 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 (
) or the Print Cartridge (
) as nec-
essary.
Remove the Left Interface Cover (
). Inspect the grounding screw and wire connected
to the Main Power Connector. The cable is grounded properly.
Y
N
Attach the grounding screw properly.
Replace the Print Cartridge (
). The Electrical Noise problem is still present.
Y
N
Problem solved.
Remove the Fuser Assembly (
). Remove the end covers (see
). Inspect the
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 (
). The problem is still present.
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 (
).
Table 1 High Voltage Power Supply Readings
High Voltage Test
Contact
Reading
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 C7.3 ± 3 VDC
Dev Bias AC
Front Transport Chute Pin Contact 555 ± 55 VAC
BTR -
BTR Roll Bushing
-81 ± 8 VDC
BTR +
BTR Roll Bushing
0 VDC
Detack Saw
Detack Saw
-930 ± 100 VDC
A
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Содержание N2125N - DocuPrint B/W Laser Printer
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