214
High Voltage Drive Circuit (Charging, Development and Transfer)
High Voltage is provided through a DC to DC converter, which changes the +24 VDC supply voltage to -
650 VDC, and output approximately 0.64 KVAC (Steady current: 200
µ
A) for the Charging Block. The
Developer Circuit converts the +24 VDC to between -300 VDC for the development bias, and outputs
1,500 VAC (p-p) at a frequency of 1.650 kHz to charge the toner. The Transfer Circuit changes the +24
VDC supply voltage to approxi280 VDC (MAX) (steady current:3
µ
A/-1500 VDC steady voltage).
3
GND
Q40
2
1
FG
Discharge Plate
Bias Transfer Roller
Bias Charge Roller
Development Roller
3
Q39
2
1
3
Q3
2
1
HVPS
CPU
pCR0
pCR1
pTR0
CN53
3
4
GND
T
C
D
5
SC PCB
Toner
Cartridge
High Voltage Drive Circuit
3
Q41
2
1
pDRCK
2
nDRCK
nTR0
nCR1
nCRCK
Содержание Facsimile UF-590
Страница 14: ...14 4 Driver No TWAIN 5 2 Sided Scanning No Items Description Remarks UF 580 UF 780 UF 590 UF 790 ...
Страница 17: ...17 1 4 Control Panel For USA and Canada UF 790 UF 780 790 780 ...
Страница 18: ...18 For Other Destinations UF 590 UF 580 ...
Страница 27: ...27 10 Remove 2 P6A Bushings 316 11 Remove the Eject Roller 303 10 11 ...
Страница 33: ...33 11 Remove 2 Screws 4N 12 Remove the Paper Feed Rollers 518 11 12 ...
Страница 238: ...238 807 807 808 805 804 802 801 811 810 810 809 803 806 K A C D E F G H I J B 8 1 3 4 5 6 7 2 2 2 Fig 8 Cassette ...
Страница 290: ...290 10 9 CCD PC Board 4 3 2 1 D C B A 1 2 3 4 Drawing Name CCD PC Board 1 1 Model UF 580 590 780 790 5V 5V ...
Страница 293: ...293 10 12 Power Supply Unit 4 3 2 1 D C B A 1 2 3 4 Drawing Name HVPS 1 4 Model UF 580 590 780 790 ...
Страница 294: ...294 4 3 2 1 D C B A 1 2 3 4 Drawing Name HVPS 2 4 Model UF 580 590 780 790 ...
Страница 295: ...295 4 3 2 1 D C B A 1 2 3 4 Drawing Name HVPS 3 4 Model UF 580 590 780 790 ...
Страница 296: ...296 4 3 2 1 D C B A 1 2 3 4 Drawing Name HVPS 4 4 Model UF 580 590 780 790 ...
Страница 297: ...297 4 3 2 1 D C B A 1 2 3 4 Drawing Name LVPS 1 1 Model UF 580 590 780 790 ...
Страница 298: ...DZZSM00158 ...