Specifications

Chapter 6: FRU Replacement and Fault Isolation Procedures
6-58
6.3.10 No–Paper Sensor failure continued
4. NO–PAPER SENSOR ACTUATOR SIGNAL ANALYSIS
Fill the Paper Cassettes with paper, and insert them into the printer.
Is there 0VDC between P/J 13–1 and P/J 13–4 (Tray 1) on the MCU PWB?
Is there 0VDC between P/J 13–3 and P/J 13–4 (Tray 2) on the MCU PWB?
Remove all of the paper from the Paper Cassettes, and insert them into the
printer.
Is there +5VDC between P/J 13–1 and P/J13–4 (Tray 1) on the MCU PWB?
Is there +5VDC between P/J 13–3 and P/J 13–4 (Tray 2) on the MCU PWB?
Yes No
Replace the MCU PWB. Go to Step 5.
5. TRAY 1 SENSOR HARNESS ASSEMBLY ANALYSIS
Disconnect P/J 13 on the MCU PWB and P/J115 on the Paper Feed PWB.
Is there continuity (0
Ω) Ω)
between all wires on J13 and J115?
Yes No
Replace the Feeder PWB. Replace the Tray 1 Harness Assembly.
6. FEEDER PWB ANALYSIS
Disconnect P/J 116 on the Paper Feeder PWB.
Is there continuity (0
Ω) Ω)
between all pins on J115 and J116 on the
Feeder PWB?
Yes No
Go to Step 7. Replace the Feeder PWB.
7. HARNESS ASSEMBLY ANALYSIS OUT (Tray 2)
Disconnect P/J 115 and P/J 116 on the Tray 2 Paper Feeder PWB.
Is there continuity (0
ΩΩ
) between all wires on J115 and J116 on the Tray 2 Harness
Assembly?
Yes No
Replace the Feeder PWB AUX. Replace the Harness Assembly OUT.