Table of Contents
Advertisement
+5 VDC Power (IIT/IPS) RAP
This RAP is used to repair failures in the +5 VDC Power circuit (IIT LVPS) 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
•
Replace the IOT CPU PWB
Replace the AC Driver PWB
(PL
9.3).
Go to
Flag 4
on BSD 1.3, and perform the following:
1.
Check the wiring at
P/J33
for open/short circuits (between the IIT/IPS LVPS and the
DADF, and the PRE IPS).
2.
Replace the IIT LVPS
(PL
3.5).
Reissue
DocuColor 12/DCCS50
(PL
9.2).
(PL
9.2).
+12 VDC Power (IOT LVPS) RAP
This RAP is used to repair short circuits in the +12 VDC Power circuit when directed by another
RAP.
Initial Actions
•
Use BSD 1.2 in the following procedure:
Procedure
Disconnect
P/J22
from the IOT LVPS and check for +12 VDC at P/J22-1 on the IOT LVPS.
+12 VDC at
P/J22
on the IOT LVPS checked OK.
Y
N
Replace the IOT LVPS
(PL
9.3).
Disconnect the following connectors from their respective PWBs:
•
P/J395
from the Half Tone PWB
•
P/J411
from the IOT Drive PWB
Reconnect
P/J22
to the IOT LVPS, and check for +12 VDC at P/J22-1. +12 VDC is mea-
sured at P/J22-1.
Y
N
Go to
Flag 6
on BSD 1.2, and check the wires for a short circuit to ground.
Measure for +12 VDC at P/J22-1 after reconnecting P/J395, and
respective PWBs. Note what PWB, if any, loads down the +12 VDC. +12 VDC was OK after
reconnecting
P/J395
to the Half Tone PWB.
Y
N
Perform the following:
•
Go to Wirenet +12/-12V DC involving the Half Tone PWB and disconnect all compo-
nents from the Half Tone PWB which are supplied with +12 VDC.
•
Reconnect the components one-by-one to the Half Tone PWB, while checking which
component/circuit loads down the +12 VDC.
•
Check the wiring to the suspected component for an open/short circuit.
•
Replace the component, which loads down the +12 VDC.
Perform the following:
•
Go to Wirenet +12/-12V DC involving the IOT Drive PWB and disconnect all components
from the IOT Drive PWB which are driven by +12 VDC (and not checked earlier in this
RAP).
•
Reconnect the components one-by-one to the IOT Drive PWB, while checking which com-
ponent/circuit loads down the +12 VDC.
•
Check the wiring to the suspected component for an open/short circuit.
•
Replace the component, which loads down the +12 VDC.
1/05
+5 VDC Power (IIT/IPS) RAP, +12 VDC Power (IOT
2-7
(PL
9.2).
(PL
9.2).
P/J411
one by one to their
Status Indicator RAPs
Advertisement
Table of Contents
Troubleshooting
