There Is No Dc Power - Oce 3121 Technical & Service Manual

45 There is no DC power.

Cause Step
1
Error code
AC power 2
supply
(faulty)
Wiring and 3
the DC loads
Fuse and wir- 4
ing
The compos-
ite Power
supply PBA
and the ACC
power sup-
ply PBA
ed.2
Checks
Turn ON the main power sup-
ply switch. Is the error code
indicated?
Is there an AC supply?
Turn OFF the main power
switch, and disconnect all
following connectors Com-
posite Power Supply PBA
J204, J211, J213, J214, J215
ACC Power Supply J134,
J142. Is the output voltage of
each terminal (Table) nor-
mal?
Has a fuse blown?
Yes/No Action
Yes
See the description for
the relevant error code.
No See "AC power is
absent."
No Turn OFF the power
switch, connect one of
the disconnected con-
nectors, and turn ON
the power switch.
Repeat this for all con-
nectors to find the con-
nector that activates the
protection circuit. Then,
check the wiring from
that connector and DC
loads.
Yes Replace the fuse. Check
the related DC loads,
and the wiring.
No Replace the power sup-
ply PBA. or the ACC
power supply PBA.
Trouble shooting 39