AR-C170 (serv.man23). External view internal structure - Sharp Copying Equipment Service Manual (repair manual). Page 11

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AR-C170M  EXTERNAL VIEW AND INTERNAL STRUCTURE  6 - 11
H. PWB 2
No.
Parts
Model
Name
Function
22
PCU PWB
Controls the engine section.
23
Driver PWB
Controls the DC load power and drive the motor.
24
AC power PWB
Controls the power on the primary side.
25
LED DL PWBs
Discharges electric charges on the OPC drums.
26
Flash PWB (PCU)
Includes the program to drive the PCU PWB.
27
High voltage TC PWB
Produces the transfer voltage.
28
DC power PWB
Outputs the voltage on the secondary side, and controls the heater lamp.
29
High voltage MC PWB
Produces a high voltage for the main charger and the developing bias voltage. 
Right side / top rear / view
23
24
25
25
26
25
25
27
28
29
22
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