Board Leds - Ricoh B234 Service Manual

Board Structure

Board LEDs

Normal Operation
With the exception of the controller board, relay board, and the PCBs of the three
CIS image position sensors, the LEDs of the other boards light GREEN while they
are operating (supplied with power).
In the low power mode, the PSU shuts down boards that are not essential for
running the machine in lower power mode, to conserve energy.
The shaded areas of the table below show the circuits that are shut down by the
PSU in the low power mode.
5VE
12VE
5VL
5VLINT
5V
24V
24VINT
24VCNT
38V
In the low power mode, power is supplied to parts of the controller, BCU, IOB, AC
boards, and the operation panel, so that the controller, operation panel and fusing
temperature control can continue to operate. All other operations of the mainframe
and finishers are shut down.
Recovery From Low Power Mode
Only two actions awaken the machine from low power mode: 1) pressing a key on
the operation panel, and 2) setting an original on the ADF.
B234/B235/B236/D101/D102/D103
O O O O
O O
O
O
O O O
O O
O
O O
O O
O
O
6-42
O
O
O
O O O O O
O
O O
SM