Service manual

FO-IS125N
5 – 11
2.2. Printer control block
Fax Engine (IC100) controls each component of Laser Beam Printer
(LBP) as follows.
1) Main Motor control
2) Pickup Motor control
3) Fuser control
4) High Voltage Generator control
5) Laser Scanning control
6) Sensor monitor
2.2.1 Signal connection
Fig. 4
3.3 V Control
Flex-0
nZC
AC Power
Flex-0
HLON
DRV
Heater
Lamp
Limit Temp.
MADC_IN
RTH
FUSER
Thermister
GPO
FAN
DRV FAN
GPO
nMEN
MA+
STEPPER
Motor MA-
MOTOR
OSC1 Driver MB+
Flex-0
STEP
MB-
24MHz
OSC2
MADC_IN
nDOP
+24V
Door SW
(Interlock)
GPO
PUS
DRV
Solenoid
GPI
nPOUT
P_OUT
from FUSER
GPI
nPIN
P_IN
GPI
TCT0
Toner C/T
DETECT SW
MADC_IN
TCT1
MADC_IN
TCT2
GPO
TC/BIASON
H/V-U
GPO
MCON
Flex-0
PWM
Flex-2
LDEN
nLDEN
LSU
Flex-0
PMCLK
OPEN nPMCLK
COLLECTOR
Flex-2
HSYNC
nHSYNC
GPI
PMRDY
nPMRDY
GPO
PMD
OPEN
nPMD
COLLECTOR
Flex-2
PDATA
nPDATA
Flex-2
S_nH
nS_H
FAX ENGINE
(IC100)
LATCH
F.F.
LBP ENGINE
COMP
COMP
3.3 V/5 V/ 24 V Control