2NC/2NF/2NG/2NN/3P7/3P8/3P9
2-1-2
1. Main/Engine PWB (MEPWB)................ Controls the software such as the print data processing and pro-
vides the interface with computers.
Controls printer hardware such as high voltage/bias output con-
trol, paper conveying system control, and fuser temperature con-
trol, etc.
2. Operation panel PWB (OPPWB) .......... Consists the LCD, LED indicators and key switches.
3. High voltage PWB (HVPWB) ................ Generates main charging, developing bias, transfer bias and sep-
aration 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. Sub PWB (SPWB) ................................ 3.3V output control when standing by.
6. Drum PWB (DRPWB) ........................... Relays wirings from electrical components on the drum unit.
7. Drum relay PWB (DRRPWB)................ Consists of wiring relay circuit between engine PWB and the
drum unit.
8. Container relay PWB (CONTRPWB) .... Consists of wiring relay circuit between engine PWB and the
toner container.
9. CIS (CIS)............................................... Reads the image of originals.
10. APC PWB (APCPWB) .......................... Generates and controls the laser beam.
List of correspondences of PWB names
No. Name used in service manual Name used in parts list Part.No.
1 Main/engine PWB (MEPWB) PARTS PWB MAIN ENGINE ASSY SP 302NN94040
2 Operation panel PWB (OPPWB) PARTS PWB PANEL MAIN ASSY SP 302NN94030
3 High voltage PWB (HVPWB) PARTS HIGH VOLTAGE UNIT SP 302NG94250
4
Power source PWB (PSPWB)
PARTS UNIT POWER SOURCE 230 SP
PARTS UNIT POWER SOURCE 120 SP
302NG94240
302NG94230
5 Sub PWB (SPWB) PWB SUB ASSY 302H701280
6 Drum PWB (DRPWB) - -
7
Drum relay PWB (DRRPWB)
PARTS PWB DRUM CONNECT ASSY
SP
2NG94290
8 Container relay PWB (CONTRPWB) P.W.BOARD ASSY CONTAINER CONN 302LV01130
9 CIS (CIS) PARTS CIS ASSY SP 302NG93070
10 APC PWB (APCPWB) - -
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