Dc Power Is Absent - Canon GP215 Service Handbook

TROUBLESHOOTING MALFUNCTIONS
26

DC power is absent.

Cause Step
Error code 1
AC power sup- 2
ply (faulty)
Wiring, DC 3
loads
Fuse, Wiring 4
Composite
power supply
PCB, ACC
power supply
Composite Power Supply PCB
Con
nec- Pin Output
tor
J204 1 +24Vu
2 0Vu
3 +24Vu
4 0Vu
5 +24Vu
6 0Vu
7 +24Vu
8 0Vu
9 +24Vu
10 0Vu
J211 1 +5V
2 0V
3 +5V
4 0V
5 +5V
6 0V
7 +5V
8 0V
9 +5V
10 0V
4–16
Checks
Turn ON the main power supply
switch. Is the error code indi-
cated?
Is AC power present?
Turn OFF the main power
switch, and disconnect all fol-
lowing connectors:
Composite Power Supply PCB
J204, J211, J213, J214, J215
ACC Power Supply
J134, J142
Is the output voltage of each
terminal (Table 7-00) normal?
Is the fuse blown?
Con Pin Output
nec-
tor
J213 1 +15V
2 +15V
3 +15V
4 –12V
5 –12V
6 –12V
J214 1 +15V
2 0V
3 –12V
J215 1 +7V
2 0V
Yes/No
YES See the descriptions for the
error code indicated.
NO See "AC power is absent."
NO Turn OFF the power switch,
connect one of the disconnect-
ed connectors, and turn ON
the power switch. Repeat this
for all connectors to find the
connector that activates the
protection circuit. Then, check
the wiring from that connector
and DC loads.
YES Replace the fuse.
Check the DC loads of the
fuse in question and wiring.
NO Replace the composite power
supply PCB or the ACC power
supply PCB.
ACC Power Supply PCB
Con
nec- Pin Output
tor
J142 1 +24V
2 +24V
3 0V
4 0V
J143 1 +24V
2 +24V
3 0V
4 0V
Action