Oce 3121, Technical & Service Manual

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ed.2 Trouble shooting 39
45 There is no DC power.
Cause Step Checks Yes/No Action
Error code 1 Turn ON the main power sup-
ply switch. Is the error code
indicated? Yes See the description for
the relevant error code.
AC power
supply
(faulty) 2 Is there an AC supply? No See “AC power is
absent.”
Wiring and
the DC loads 3 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? 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.
Fuse and wir-
ing 4 Has a fuse blown? Yes Replace the fuse. Check
the related DC loads,
and the wiring.
The compos-
ite Power
supply PBA
and the ACC
power sup-
ply PBA
No
Replace the power sup-
ply PBA. or the ACC
power supply PBA.