Specifications

Chapter 6: FRU Replacement and Fault Isolation Procedures
6-70
6.3.16 Turn Solenoid failure Continued
Use Diagnostic Tool test DG85 to check the Turn Solenoid in Tray 2.
Is there +24VDC between P/J 13–9 and P/J 11–2 on the MCU PWB when you do not actu-
ate the solenoid in Tray 2?
Is there 0VDC between P/J 13–9 and P/J 11–2 on the MCU PWB when you actuate the
solenoid in Tray 2?
Yes No
Replace the Turn Solenoid. Go to Step 4.
4. TURN SOLENOID ANALYSIS
Disconnect P/J111 from the HVPS. Perform this test within 30 seconds after switching power on.
After 30 seconds, the LVPS shuts down with a no-load condition.
Switch ON Main Power.
Is there +24VDC between P/J 13–8 and P/J 11–2 on the MCU PWB (Tray 1)?
Is there +24VDC between P/J 13–9 and P/J 11–2on the MCU PWB (Tray 2)?
Yes No
Replace the MCU PWB. Go to Step 5.
5. TRAY 1 HARNESS ASSEMBLY ANALYSIS
Disconnect P/J13 on the MCU and P/J115 on the Paper Feeder PWB.
Is there continuity (0
Ω)Ω)
between all wires on J13 and J115?
Yes No
Go to Step 6. Replace the Tray 1 Harness Assembly.
6. Have you isolated the problem to Turn Solenoid 1 of Feeder Assembly 1?
Yes No
Go to Step 7. Go to Step 8.
7. FEEDER PWB ANALYSIS
Disconnect P/J115 and P/J202 on the Paper Feeder PWB.
Is there continuity (0
Ω) Ω)
between all pins on J115 and J202 on the Feeder PWB?
Yes No
Replace the Turn Solenoid 1 of Feeder Assembly Replace the Feeder PWB.