Bias Board - Kyocera FS-1020D Service Manual

2FM

2-3-4 Bias board

The bias board contains the developing bias output circuit, registration sensor, and the cassette switch. It also provides a
liaison connection to the high voltage board, power supply, and the toner sensor.
+24V2
+24V1
Inter-
lock
switch
+5V
Power
High
supply voltage
board
board
2-3-10
+5V
Toner
TONER
sensor
SLEEP
+24V2
+24V2
+24V3
+5V
+5V
FAN
HEATN
ZCROSS
EXTIN, THERM
275 V DC + AC
Developing
roller
Figure 2-3-7 Bias board circuit block diagram
Bias board
TONER
SLEEP
+24V2
+24V3
(Q305,Q206)
+24V3
+5V
Regist-
RESIT
ration
sensor
Casette
SWIN
switch
RTHVDR, HVISEL
MHVDR1, MHVD2
PSEL1, THVDR
FAN1
FAN2
HEATN
ZCROSS
EXTIN, THERM
+24V2
HVCLK
Developing bias
output circuit
Engine
board