Olivetti PG L2555 Service Manual page 158

2-2 Electrical Parts Layout
2-2-1 Electrical parts layout
(1) PWBs
13
5
6
4
3
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. Power source PWB (PSPWB) .............. After full-wave rectification of AC power source input, switching
4. High voltage PWB (HVPWB) ................ Generates main charging, developing bias, transfer bias.
5. Drum PWB (DRPWB) ........................... Relays wirings from electrical components on the drum unit.
6. Drum relay PWB (DRRPWB)................ Consists of wiring relay circuit between engine PWB and the
7. Relay-L PWB (R-LPWB) ....................... Consists of wiring relay circuit between engine PWB and drum
8. Operation PWB (OPPWB-M) ................ Consists the LCD, LED indicators and key switches.
9. Backlight PWB (BLPWB) ...................... LCD lighting.
10. Fuser thermistor relay PWB
(FUTHRPWB) ....................................... Consists of wiring relay circuit between engine PWB ,fuser
11. APC PWB (APCPWB) .......................... Generates and controls the laser beam.
12. PD PWB (PDPWB) ............................... Controls horizontal synchronizing timing of laser beam.
13. Container PWB (CPWB) ....................... Reads the container information.
8 9 2 12
Machine right
Figure 2-2-1 PWBs
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.
Drum individual information in EEPROM storage.
drum unit.
connect PWB.
thermistors and cooling fans.
2-2-1
11 7 1 1 1 10
Machine inside