Sharp AL-841, Service Manual, Page: 5 / 28

C. Functional parts
(5) PWB
No.
Parts
MODEL Note
Name Function/operation
1 Power PWB Outputs DC power. Drives the heater lamp. The voltage specification differs
depending on the destination.
2 Scanner lamp drive
PWB Controls light quantity of the scanner lamp.
3 ICU PWB Converts print data set from the host and converts it into bit
image data and send to the MCU. Allows connection with one
host computers. Printer models
only
4 MCU (PCU) PWB Controls the image process section and the engine section.
5 High voltage power
PWB Outputs the high voltage for the image process section.
Controls the main motor.
6 Operation control PWB Displays the value information. Outputs the key operation
signal.
(11) Adjustment volume
No.
Parts
Note
Code Name Function/operation
1 VR1 Scanner lamp light quantity adjustment
volume Adjusts the scanner lamp light quantity.
2 VR601 Output voltage adjustment volume Adjust the DC output voltage (
+
24V).
VR801 Main charger voltage adjustment volume Adjusts the main charger voltage.
VR802 Developing bias voltage adjustment
volume Adjusts the developing bias voltage.
1)
2)
3)
4)
5)
6)
1)
VR601
VR802
VR801
AL-841
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