Xerox DocuColor 12/DCCS50, Service Manual

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1/05
2-6 DocuColor 12/DCCS50
+3.5 VDC Power (IIT/IPS LVPS) RAP, +5 VDC Power
Reissue
Status Indicator RAPs
+3.5 VDC Power (IIT/IPS LVPS) RAP
This RAP is used to repair failures in the +3.5 VDC Power (IIT/IPS LVPS) circuit when directed
by another RAP.
Initial Actions
• Use BSD 1.3 in the following procedure:
Procedure
Disconnect J5 . Go to Flag 1 on BSD 1.3, and check for ACH between J5 -3 and J5 -2 on the
harness side. ACH is measures between J5 -3 and J5 -2 on the harness side.
Y N
Go to the AC Power RAP .
Go to Flag 2 on BSD 1.3. Less than +1 VDC is measured at P/J11A -1.
Y N
Go to Flag 3 on BSD 1.3. Less than +1 VDC is measured at P/J11A -13.
Y N
Perform the following:
•
Replace the IOT Drive PWB ( PL 9.2 ).
• Replace the IOT CPU PWB ( PL 9.2 ).
Replace the AC Driver PWB ( PL 9.3 ).
Go to Flag 5 on BSD 1.3, and perform the following:
1. Check the wiring at P/J31 for an open/short circuit to the POST IPS.
2. Replace the IIT LVPS ( PL 3.5 ).
3. Replace the PRE IPS PWB ( PL 3.5 ).
4. Replace the POST IPS PWB ( PL 3.5 ).
+5 VDC Power (IOT LVPS) RAP
This RAP is used to repair failures in the +5 VDC Power circuit when directed by another RAP.
Initial Actions
• Use BSD 1.2 in the following procedure:
• P/O P/O the machine, and look for symptoms of a blank UI and a machine locked into the
Power Save Mode.
Procedure
The machine exits Energy Saver Mode when the Main Switch is switched ON.
Y
N
Refer to BSD 1.2. Check for +5 VDC between P/J25 -1 and P/J25 -2 on the IOT LVPS.
+5 VDC is measured between P/J25 -1 and P/J25 -2.
Y N
Perform the following:
•
Go to Flag 4 and Flag 5 on BSD 1.2, and check for an open circuit.
• Replace the IOT LVPS ( PL 9.3 ).
• Replace the Half Tone PWB ( PL 9.2 ).
• Replace the Tray PWB ( PL 9.3 ).
• Replace the AC Driver PWB ( PL 9.3 ).
Go to the Power Save and LED RAP .
Go to the Power Save and LED RAP .
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