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4.1.2. Engine Control Block Diagram
Noise
Filter
Rectifier
Thermistor
Voltage Control
Circuit
Voltage
Detector
+24V
+5V
Fuser Driver
Heat Lamp
Thermal
Fuse
Thermostat
Thermister
TH
+24V IR
nCHGCTL
nDBCH
nTRCTL
TECTL
nDB
nTR
TE_LED
Charger
Current
Grid Voltage
Transfer Current
OPC
Drum
DEV BIAS
Toner
Box
Developer
Front Door
Interlock
Switch
+24V IR
+24V
+5V24V
(GND)
5V
(GND)
Fuser Control Circuit
HV Driver
nFSRCTL
nFCTL
OPC Drum Unit
Interlock Switch
+5V
LD
Driver
+5V IR
nHSYNC
nOPTION
nPNON_OP
nVIDEO
nLDENB
nADJUST
+24V
+5V
+5V
CLOCK_OP
nMOEN_OP
nPUCTL_OP
nOPTION
nPNON_OP
nRST
nPUCTL_OP
+24V IR
nHSYNC
nVIDEO
DOPEN
+24V IR
ParallelEthernet
(Only for KX-P7110)
Ready
Error
Toner/Process
Switch
Indicator Board
Top
Sensor
Registration
Sensor
Regist/Top Sensor Board
nREGSEN
nEXITSEN
Exit Sensor
Exit Sensor
Board
Paper Empty
Sensor Board
SMnA
SMnB
SMA
SM1A
nSM1EN
SMB
nCS
SCK2
SO2
SI2
X001
CPUCLK
10_CTL
11_CTL
ROM
16KB
RAM
512 Byte
CPU
+24V IR
M
PPRDY
nPURGE, nPRDY,nTOP,nSBSY,SXD
EEPCS
EEPCLK
EEPDO
EEPDI
+5V
EEPROM
2 k bit
nPSAVE, nPRINT,CCLK,nCBSY,CXD
nKEY
READY
ERROR
TONER
USB
nTOPSEN
Power Supply Unit
Fuser Unit
Main Control
Board
Engine Control
Board
High
Voltage
Supply
Unit
OPC Drum Unit
LSU
2nd
Feeder
(Option)
2nd
Feeder
I/F 
Board
FAN
Control Circuit
FANERR
FAN
FANERR
FANCTL
TH
TESEN
TESEN
FANPWR
SNRCLK
SNRCTL
nSNRLD
nSNRCLK
nSNRCTL
nSNRLD
PUNIT
PNON
IC004
IC002
IC005
Bipoler
Moter
Driver
2nd
Feeder
I/F Circuit
IC003 
Recet IC
IC006
2ch
Stepping
Motor
Controller
APC
Controller
IC001 ASIC
Polygon
Motor
I/F Circuit
+24V IR
Paper Empty Sensor
Toner Empty
Sensor 
Toner Empty
Sensor
Board 
PUCTL
REGCTL
EXITCTL
Pick Driver
Regist Driver
Exit Driver
+24V
Pick Solenoid
Regist Solenoid
Switchback Solenoid
+24V
+24V
55
KX-P7105 / KX-P7110