Power Supplies - Ricoh DD 4450 Service Manual

Electrical Component Defects

6.2.3 POWER SUPPLIES

Component
+5v (CN102-4)
+5v (CN102-2, 3)
+12v (CN102-9)
-12v (CN102-8)
+24v (CN111-3, 4, 5, 6)
+24v (CN111-1)
Motor drive board FUSE
FU700(PSU)
FU701 (PSU)
FU702(PSU)
FU703,FU704(PSU)
C279
Condition
No supply The machine does not turn on.
No supply The machine does not turn on, but LED103
on the MPU blinks.
No supply Black stripes in the image.
No supply The LCD/LEDs on the operation panel do
not indicate.
No supply E-47 is displayed, and the output mode in
SP mode does not turn anything on except
the main motor.
No supply E-12 is displayed, and SP5-13, 14, 15
(master eject motor/ pressure plate motor
output mode) do not turn the motor on.
FUSE The "open cover" indicator is lit.
FUSE The machine does not turn on.
E-41 is displayed, and the output mode
FUSE in SP mode does not turn anything on
except the main motor.
E-12 is displayed, and the output mode
FUSE in SP mode does not turn anything on
except the main motor.
FUSE E-06 is displayed.
6-18
Symptom
SM