Switches; Blown Fuse Conditions - Ricoh B121 Service Manual

BLOWN FUSE CONDITIONS

4.2.2 SWITCHES

Component
Upper Paper
Size
Vertical
Transport Door
Lower Paper
Size
By-pass Paper
Size
Right Door
Front/Right
Cover
Main
4.3 BLOWN FUSE CONDITIONS
Fuse
120 V
Power Supply Board
FU1 15A/125V
FU2 6.3A/250V
FU3 1A/125V
FU4 4A/250V
FU5 4A/250V
FU6 4A/250V
FU7 4A/250V
FU8 3.15A/250V
B121 Series/B259 Series
CN Condition
115- Open
1,2,4
Shorted
(BICU)
Open
110-5
(BICU)
Shorted
113- Open
1,2,4
Shorted
(BICU)
136-
1,2,4,5 Open
(BICU)
Open
124-5
(BICU)
Shorted
Open
130-1
(BICU)
Shorted
Open
281-3,4
(PSU)
Shorted
Rating
220 – 240 V
—
3.15A/250V
1A/250V
4A/250V
4A/250V
4A/250V
4A/250V
3.15A/250V
Symptom
The CPU cannot detect the proper paper size,
and misfeeds may occur when a copy is made
from the 1st paper tray.
The Cover Open indicator is lit even if the
vertical transport door is closed.
The Cover Open indicator is not lit even if the
vertical transport door is opened.
The CPU cannot detect the proper paper size,
and misfeeds may occur when a copy is made
from the 2nd paper tray.
The CPU misdetects or is not able to detect the
size of the paper set in the bypass tray, causing
possible misfeeds when feeding from this tray.
The Cover Open indicator is lit even if the right
door is closed.
The Cover Open indicator is not lit even if the
right door is open.
The Cover Open indicator is lit even if doors are
closed.
The Cover Open indicator is not lit even if doors
are open.
The machine does not turn on.
The machine does not turn off.
Symptom when turning on the main switch
No response.
No response.
Anti-condensation/Tray Heater does not turn
on.
No response.
No response.
SC901 is displayed.
Optional peripherals are detected but do not
function.
No response.
4-14 SM