Blown Fuse Conditions; Led Display; Bicu; Iob - Ricoh B039 Service Manual

BLOWN FUSE CONDITIONS

Component
Right Door
Front/Right
Cover
Main
4.3 BLOWN FUSE CONDITIONS
Fuse
120 V
Power Supply Board
FU1 15 A/125 V
FU2 6.3 A/250 V
FU3 2 A/125 V
FU4 4 A/125 V
FU5 4 A/125 V
FU6 3.15 A/125 V

4.4 LED DISPLAY

4.4.1 BiCU

Number
Monitors the +5 V line for the CPU and the surrounding
circuit.
LED 1
Usually, this LED is blinking.
Monitors the +5 V line.
LED 2
Usually, this LED is lit.

4.4.2 IOB

Number
Monitors the connection between the IOB and the BiCU.
LED301
Usually, this LED is blinking.
B039/B040/B043
CN Condition
Open
331-5
(IOB)
Shorted
Open
328-1
(IOB)
Shorted
Open
281-3,4
(PSU)
Shorted
Rating
220 – 240 V
—
3.15 A/250 V
2 A/250 V
4 A/250 V
4 A/250 V
3.15 A/250 V
Function
Function
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.
Optional peripheral(s) are detected but do not
function.
The Cover Open indicator is lit then SC901 is
displayed.
LEDs are not lit and the LCD display does not
function (backlight only).
4-10
Symptom
SM