Blown Fuse Conditions; Sub Psu; Bcu - Ricoh J-P3 Service Manual

20 February 2004

4.5 BLOWN FUSE CONDITIONS

Main PSU
The table lists the fuses on the main power supply unit.
Fuse
FU1 15A/125V
CB1
FU2 10A/125V
FU91 10 A/250 V

Sub PSU

The table lists the fuses on the sub power supply unit.
Fuse
F1 4A/250V
F2 8A/250V

BCU

The table lists the fuses on the sub power supply unit.
Fuse
FU1 3A/32V
FU2
FU3
Rating
115 V 220 - 240 V
—
— 8A/250V
5 A/250V
10 A/250V
Rating
115V 220–240V
3.15A/250V
8A/250V
Rating Symptom when turning on the main switch
No response
SC 680 (BCU/ MUSIC communication error: The power
1A/24V is not supplied to the ID chips on the toner bottles, so the
toner bottles are not recognized.)
When you turn on the main power switch, the operation
4A/24V panel displays messages as usual but the characters are
not clear. After this, the messages and LEDs turn off.
BLOWN FUSE CONDITIONS
Symptom when turning on the main
No response (No power is supplied to
the electrical components.)
No response (No DC power is
supplied to the electrical components.)
The 24V DC power is not supplied.
The message, "Close Front Cover," is
displayed.
Symptom when turning on the main
The two-tray finisher or booklet
finisher is not detected. "Close Duplex
Unit Cover" is shown.
The two-tray finisher or booklet
finisher is not detected. "Close Duplex
Unit Cover" is shown.
4-21
switch
switch