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2-2-1 Electrical parts layout
2-2 Electrical Parts Layout
(1) PWBs
1
1. Main PWB (MPWB) .............................. Controls the software such as the print data processing and
2. Engine PWB (EPWB)............................ Controls printer hardware such as high voltage/bias output con-
3. High voltage PWB (HVPWB) ................ Generates main charging, developing bias, transfer bias.
4. Power source PWB (PSPWB) .............. After full-wave rectification of AC power source input, switching
5. Operation panel PWB 1 (OPPWB 1) .... Consists of the LCD, LED indicators and key switches.
6. Operation panel PWB 2 (OPPWB 2) .... Consists of the LED indicators and key switches.
Y118240-1
16
9
4
Machine front
provides the interface with computers.
trol, paper conveying system control, and fuser temperature con-
trol, etc.
for converting to 24 V DC for output. Controls the fuser heater.
3
2
12
13 14
15
Machine inner
Figure 2-2-1 PWBs
2-2-1
10
8
7,17
18
5
6
11
Machine rear
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