Kyocera FS C5020N - Color LED Printer Service Manual page 175

(2) Drum unit, developer unit and fuser unit
DRUM UNIT
1. Drum PWB 1, 2, 3, 4 .................................... Drum PWB 1 (magenta), drum PWB 2 (cyan), drum PWB 3 (yellow),
2. Zener PWB 1, 2, 3, 4 ................................... Adjusts the main charger grid electrostatic potential.
3. Fuser PWB................................................... Relays wirings from electrical components on the fuser unit.
4. Eraser lamp 1, 2, 3, 4................................... Eliminates the residual electrostatic charge on the drum.
5. Toner sensor 1, 2, 3, 4 ................................. Measures the toner concentration in the toner hopper.
6. Fuser thermistor 1........................................ Detects the temperature of the heat roller.
1
7. Fuser thermistor 2*
8. Exit sensor ................................................... Detects paper misfeed in the fuser unit.
9. Rear cover open/close sensor ..................... Detects the rear cover open.
10. Face up/down solenoid ................................ Switches the output stack between face up and face down.
11. LED print head 1, 2, 3, 4 .............................. LED print head 1 (magenta), LED print head 2 (cyan), LED print head 3
12. Fuser heater lamp 1..................................... Heats the heat roller.
13. Fuser heater lamp 2*
14. Fuser thermostat 1....................................... Disable power for the fuser heater lamp 1 in emergency.
15. Fuser thermostat 2*
1
* : 16 ppm printer only.
DEVELOPER UNIT
Figure 2-2-2 Drum unit, developer unit and fuser unit
drum PWB 4 (black) wiring relay circuit inside each color drum unit. Drum
individual information in EEPROM storage.
..................................... Detects the temperature of the press roller*
(yellow), LED print head 4 (black) lighting of dot light to drum of each
color drum unit.
1
.................................. Heats the press roller*
1
..................................... Disable power for the fuser heater lamp 2*
FUSER UNIT
(24 ppm printer)
1
.
1
.
1
in emergency.
2F3/2F4
FUSER UNIT
(16 ppm printer)
2-2-3