Rap18 - Xerox Document Workcenter 150 Service Manual

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RAP 18 Paper Feeding
This procedure is used to troubleshoot printer
paper feed problems.
Initial Actions
* Disconnect the power cord and ensure that
there is no obstruction in the paper path.
* Clean the paper feed roller.
Procedure
NOTE: The circuit diagrams are OR the
following two pages.
1. Check fuse Fl on the main PWB.
Fl is OK.
i N
Replace the fuse (PL 8.1). If the new
fuse fails, go to step 7.
2. Check fuse F2 on the main PWB.
F2 is OK.
i N Replace the fuse (PL 8.1). If the new
fuse fails, go to step 9.
3. Disconnect CN3 and CN4 from the main
PWB. Measure the voltage at the following
pins on the main PWB.
CN3.1~32 -._..___.___.__.._ +42VDC
CN4.j 8 2-. _ _. _ _. __ . _. _ +42vDC
Voltages are correct.
Y N
I
Perform RAP 10.
4. With connectors CN3 and CN4 disconnected,
measure the resistance between the pins.
Refer to Tables 4 and 5.
Resistance is OK.
i !epIace the defective motor
(REP 7.2 or REP 5.2).
5. Check the following components and
connections.
* ASF sensor and harness connector CN6
(REP 6.2).
* Encoder and harness connector (REP 5.4).
* Paper feed brake solenoid (RAP 27).
* Head ribbon cable and connectors (PL 5.1).
Components and connections are OK.
i Lpair or replace part
6. Replace the main PWB (REP 8.1).
7. Check the paper feed motor for mechanical
binding or incorrect reSi&ance (fable 2).
Motor is OK.
Y N
I
Replace the paper feed motor
(REP 7.2).
8. Replace the main PWB (REP 8.1).
9. Check the carriage motor for mechanical
binding or incorrect resistance (Table 1).
i
6
I/ t
Motor is OK.
i N Replace the carriage motor (REP 5.2)
10. Replace the main PWB (REP 8.1).
Table 1 Carriage Motor
Table 2 Paper Feed Motor
Roller
Paper Feed Guide Assembly
Paper Feed Motor
Document WorkCenter 150
Si96
2-11
RAP 18 Paoer
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