Electrical Component Defects; Sensors; Switches; Fuses - Ricoh G031 Service Manual

7.4 ELECTRICAL COMPONENT DEFECTS

7.4.1 SENSORS

Component
CN
(Symbol)
Fusing Exit
6-8
(S1)
(ECB)
Tray Paper
End (S2)
4-1
(ECB)
Tray Paper
Near-end (S3)
4-4
(ECB)
By-pass Tray
Paper Set
3-5
(S4)
(ECB)
Registration
3-2
(S5)
(ECB)
Toner Near-
end (S6)
5-2
(ECB)

7.4.2 SWITCHES

Component
CN
(Symbol)
Main (SW1)
101-1,2
(PSU)
Front Cover
Safety (SW2)
103-1,2
(PSU)
Tray Paper
4-5,6,8
Size (SW3)
(ECB)

7.4.3 FUSES

Rating
Fuse
115 V 220 ~ 240 V
Power Supply Board
FU1 5 A/125 V 3.15 A/250 V No response.
FU2 15 A/250 V
FU3 5 A/125 V
SM
Condition
Open A paper jam at the fusing unit whenever a print is made.
Shorted The Paper Jam message appears even if there is no paper.
The Paper End message appears even if paper is placed in
Open
the paper tray.
The Paper End message does not appear even if there is
Shorted
no paper in the paper tray.
The Paper Near End message does not appear on the PC
Open
even if the paper tray is almost empty.
The Paper Near End message appears on the PC even if
Shorted
enough paper is placed in the paper tray.
When selecting the by-pass tray, the Paper End message
Open does not appear even if there is no paper in the by-pass
tray.
When selecting the by-pass tray, the Paper End message
Shorted
appears even if there is paper in the by-pass tray.
Open A paper jam at the registration roller when a print is made.
Shorted The Paper Jam message appears even if there is no jam.
Toner is not added, even if there is not enough toner in the
Open
toner supply unit.
Toner is added, even if there is enough toner in the toner
Shorted
supply unit.
Condition
Open The machine does not turn on.
Shorted The machine does not turn off.
The Cover Open message is displayed even if the front
Open
cover is closed.
The Cover Open message is not displayed even if the front
Shorted
cover is open.
Open The CPU cannot detect the proper paper size, and misfeeds
may occur when a print is made.
Shorted
Symptom when turning on the main switch
6.3 A/250 V After turning on the main switch, SC542 is displayed.
5 A/250 V No response.
7-17
ELECTRICAL COMPONENT DEFECTS
Symptom
Symptom
G031/G032