2K3/2L3
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 such as the 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, transfer bias.
4. 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.
5. Power source PWB sub (PSPWB-S) .... 5V output control when standing by.
6. Operation panel PWB main
(OPPWB-M) .......................................... Consists the LCD, LED indicators and key switches.
7. Operation panel PWB left
(OPPWB-L) ........................................... Consists the LED indicators and key switches.
8. Operation panel PWB right
(OPPWB-R) .......................................... Consists the LED indicators and key switches.
9. LCD PWB (LCDPWB)........................... Controls the LCD display.
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7
2
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Machine innerMachine front Machine rear
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8
16
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