2KZ/2K0
2-2-1
2-2 Electrical Parts Layout
2-2-1 Electrical parts layout
(1) PWBs
Figure 2-2-1 PWBs
1. Main PWB (MPWB) .............................. Controls the software for print data processing and provides the
interface with computers.
2. Engine PWB (EPWB)............................ Controls printer hardware such as high voltage/bias output con-
trol, paper conveying system control, and fuser temperature con-
trol, etc.
3. High voltage PWB (HVPWB) ................ Generates main charging, developing bias, secondary transfer
bias.
4. High voltage PWB sub (HVPWB-S)...... Generates primary transfer bias, cleaning bias.
5. Power source PWB (PSPWB) .............. After full-wave rectification of AC power source input, switching
for converting to 24 V DC for output. Controls the fuser heater.
6. Power source PWB sub (PSPWB-S) .... 5V output control when standing by.
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Front Inside Rear
Y113010-4 Sevice Manual
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