Xerox DocuColor 12/DCCS50, Service Manual

Page: 46 / 1617

1/05
2-10
DocuColor 12/DCCS50
+24 VDC Power (IIT/IPS LVPS) RAP, AC Power RAP
Reissue
Status Indicator RAPs
+24 VDC Power (IIT/IPS LVPS) RAP
This RAP is used to repair failures in the +24 VDC Power (IIT/IPS LVPS) circuit when directed
by another RAP.
Initial Actions
• Use BSD 1.3 in the following procedure:
Procedure
Disconnect P/ J5 . Go to Flag 1 on BSD 1.3, and check for ACH between P/ J5 -3 and P/ J5 -2
on the harness side. ACH is measures between P/ J5 -3 and P/ J5 -2.
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 7 on BSD 1.3, and perform the following:
1. Check the wiring from P/J35 for an open/short circuit between the DADF Control PWB or
Lamp Ballast PWB.
2. Replace the IIT/IPS LVPS ( PL 3.5 ).
AC Power RAP
This RAP is used to repair failures in the AC Power circuit when directed by another RAP.
Initial Actions
• Check that the specified level of AC Line voltage is present at the wall receptacle.
Procedure
With the machine plugged into the AC source and the Circuit Breaker and Main Switch
switched on, check that AC Line voltage is measured between
P/J17 -1,2,3 (ACH) and P/J17 -
4,5,6 (ACN). AC Line voltage checked OK between P/J17 -1,2,3 and P/J17 -4,5,6.
Y N
Check for AC Line voltage between P/J16 -1 (ACH) and P/J16 -4 (ACN) on the AC Driver
PWB ( PL 9.3 ). AC Line voltage checked OK between P/J16 -1 and P/J16 -4.
Y N
Check for AC Line voltage between P/J15 -1and P/J15 -3 on the AC Driver PWB ( PL
9.3 ). AC Line voltage is present between P/J15 -1 and P/J15 -3.
Y N
Go to Flag 1 on BSD 1.1, and check for an open circuit between P/J16 on the
AC Driver PWB and the AC Plug on the Line Cord.
Replace the AC Driver PWB ( PL 9.3 ).
With the machine plugged into the AC source, and the Circuit Breaker switched on, check
for 18 VAC between
P/J19 -6 and P/J19 -12 on the AC Driver PWB ( PL 9.3 ). 18 VAC is
present between P/J19 -6 and P/J19 -12.
Y N
Go to Flag 2 on BSD 1.1, and check for an open circuit.
Perform the following:
•
Go to Flag 1 , Flag 2 , Flag 3 , Flag 4 , and Flag 5 on BSD 1.1 and check for open cir-
cuits. Also check for short circuits to ground at Flag 3 , Flag 4 , and Flag 5 .
• Replace the Main Switch ( PL 9.1 ).
• Replace the AC Driver PWB ( PL 9.3 ).
• Replace the IOT Drive PWB ( PL 9.2 ).
+5 VDC is measured between P/J11B -17 and P/J11B -19.
Y N
Go to Flag 3 on BSD 1.1, and check for an open circuit. If the circuit is OK, replace the AC
Driver PWB ( PL 9.3 ).
+24 VDC is measured between P/J11A B-15 and DC COM when the Main Switch is
switched ON.
Y
N
Go to Flag 5 on BSD 1.1, and check for an open/short circuit. If the circuit is OK, perform
the following:
•
Go to the +24 VDC Wirenet and check for an open/short circuit.
• Replace the AC Driver PWB ( PL 9.3 ).
• Replace the IOT Drive PWB ( PL 9.2 ).
A
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