Shorted
“Doors/Covers” Open is not displayed even if
the front cover is opened.
Blown Fuse Conditions (PSU)
Fuse
Rating
Symptom at Power On
115V 210~230V
FU1 6.3 A/125 V 6.3 A/250 V “Doors/Covers Open” is displayed
FU2 6.3 A/125 V 6.3 A/250 V “Doors/Covers Open” for the finisher is displayed
FU3 6.3 A/125 V 4 A/250 V Paper end condition
FU4 6.3 A/125 V 6.3 A/250 V SC121 is displayed
FU5 6.3 A/125 V 6.3 A/250 V SC302, or SC403, or SC405 displayed
FU101 15 A/125 V — No response
FU102 10 A/12 5V 5 A/250 V No response
FU103 2 A/125 V 1 A/250 V Normal operation (optional heaters do not work)
BICU LEDs
Number Monitored Signal
LED101
Monitors whether the program is working normally or not. The LED blinks in normal con-
ditions.
LED102 Flashes during program downloading.
Controller Board Test Points
No. Monitored Signal
TP1 GND
TP2 —
4. Troubleshooting
178
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