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Service Guide - OKIPAGE 8c
Chapter 2 Operation
2.3 Power/Board
The power board consists of an AC filter circuit, a low voltage power supply circuit, a high voltage power
supply circuit, and heater drive circuit, and photo sensors.
(1) Low voltage power supply circuit.
This circuit generates the following voltages.
Output voltage
Use
+3.3 V
CU Unit CPU, LED HEAD
+5 V
Logic circuit supply voltage
+32 V
Motor and fan drive voltage and source voltage for high-voltage supply,
discharge lamp
+12 V
HSP, OP Amp, high voltage power supply
-12 V
HSP
(2) High voltage power supply circuit
This circuit generates the following voltages necessary for electro-photographic processing from +32 V in
accordance with the control sequence from the control board. When cover open state is detected, +32 V
supply is automatically interrupted to stop the supply of all high-voltage outputs.
YMCK = Yellow, Magenta, Cyan, Black
Output
Voltage
Use
Remarks
CH
-1.35 KV
±
50V
Voltage applied to charging
roller
DB
Normal paper
Y.M.C.K.: -250V/+300V, -232V/+300V
(First paper: Y only)
K.: -270V/+300V
Transparency
Y.M.C.: -200V/+300V, K.:
-250V/+300V
Voltage applied to
developing roller
SB
Y.M.C.K.: -650V/0V
Voltage applied to toner
supply roller
TR
0 to 4 KV
Voltage applied to transfer
roller
Variable
FIX
0 to 2.5 KV
Voltage applied to transfer
roller
Variable
Содержание OKIPAGE 8c
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Страница 277: ...Page 138 Service Guide OKIPAGE 8c Chapter Product Accessory I Second Paper Feed 5 2 PCB Layout TQSB 2 PCB ...
Страница 280: ...Page 140 Service Guide OKIPAGE 8c Chapter Product Accessory I Second Paper Feed High Capacity Second Paper Feeder ...
Страница 281: ...Table 6 1 High Capacity Second Paper Feeder No Description OKI J Part Qty 1 AOLD PCB 1 2 Feed roller 56408701 1 ...
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