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SIGNALS AND ABBREVIATIONS
What follows below is a list of signals and abbreviations used in the chapters of the manual and circuit diagrams.
The abbreviations within parentheses represent analog signals, which cannot be expressed in terms of `1' or `0'.
1. Signals T_FW_ON TRANSFER DC BIAS ON signal
ACBIAS AC BIAS OSCILLATION signal T_FW_S TRANSFER CURRENT DETECTION signal
[AE] AE SENSOR OUTPUT signal T_REV_ON TRANSFER POSITIVE DC BIAS ON signal
AEREF AE SENSOR REFERENCE signal TH1 FIXING THERMISTOR signal
BIAS_PWM DC BIAS CONTROL signal TH2 SCANNER THERMISTOR signal
BIAS_S DC BIAS MONITOR signal
CLK32K TRANSFORMER CONTROL signal 2. Abbreviations
CPUSD CASSETTE PICKUP SOLENOID DRIVE signal AER AE (MEASUREMENT) ROTATION
DPD DELIVERY PAPER DETECTION signal INTR INITIAL ROTATION
DV_AC_ON DEVELOPING AC BIAS ON signal LSTR LAST ROTATION
DV_DC_ON DEVELOPING DC BIAS ON signal SCFW SCANNER FORWARD
E0_DT E0 DETECTION signal SCRV SCANNER REVERSE
FM1D SCANNER COOLING FAN DRIVE signal STBY STANDBY
HEAT_ERR FIXING HEATER ERROR signal
HEAT_OFF FIXING HEATER OFF signal
HEAT_PWM FIXING HEATER DUTY signal
HEAT_TRG FIXING HEATER DRIVE signal
LAMP_DETECT LAMP ACTIVATION DETECTION signal
LAMP_ON SCANNING LAMP ACTIVATION signal
LHP LENS HOME POSITION signal
LNSLD LENS SOLENOID DRIVE signal
MFSLD MULTIFEEDER PICKUP SOLENOID DRIVE signal
MLOCK MAIN MOTOR CONSTANT SPEED signal
MMCLK MAIN MOTOR CLOCK PULSE signal
MMD MAIN MOTOR DRIVE signal
PAC_OUT PRIMARY CORONA AC BIAS signal
PAC_S PRIMARY CORONA AC DETECTION signal
PDC_PWM DC BIAS CONTROL signal
PDC_S DC VOLTAGE MONITOR signal
PDP VERTICAL PATH ROLLER PAPER DETECTION signal
PR_DC_ON PRIMARY CHARGING DC BIAS ON signal
PUSLD PICKUP CLUTCH SOLENOID DRIVE signal
PWM_1KHz SCANNING LAMP INTENSITY ADJUSTMENT signal
PWOFF POWER SWITCH OFF signal
RGSLD REGISTRATION CLUTCH SOLENOID DRIVE signal
RLOFF RELAY DRIVE signal
RPD PRE-REGISTRATION ROLLER PAPER DETECTION signal
SB_LP SIDE BLANK EXPOSURE LAMP ON signal
SC_A SCANNER MOTOR PULSE signal A
SC_B SCANNER MOTOR PULSE signal B
SC_COM SCANNER MOTOR DRIVE signal
SCHP SCANNER HOME POSITION signal
SFPD SINGLE-FEEDER PAPER DETECTION signal
T_FEEDBACK TRANSFER BIAS VOLTAGE DETECTION signal
T_FW_DRV TRANSFER DC BIAS CONTROL signal
GENERAL CIRCUIT DIAGRAM
Fixing heater
H1
J16
MAIN MOTOR DRIVER PCB Copier
1
J901
[220/240V] Thermal fuse 1 Scanning lamp 2
Main motor
FU1 LA1 1
Line filter J502 J501 M1
LF1 2
H FT2 FT4
2 2 J17 FT6 3 M
1 1 J434 4
N FT1 FT3 J15 J2 1 1
J1 2 2
DS1 NF1
FT5
MLOCK
Door switch FU2
+24VU
NOISE FILTER PCB BP701 BP705
MMD
Thermal fuse 2
GND
PR
1 2 3 2 1 4 3 2 1
[120V] J910 J207 J205 BP703
DV
BP707
H FT2 FT4 JP502 J501 J501F
J209
2 2 2
N FT1 FT3 JP501 J201
1 1 1 BP702 BP706
J14
J1 J212
DS1
Door switch NF1 COMPOSITE POWER SUPPLY PCB J11 J12
NOISE FILTER PCB J213 BP704
VZ2
Varistor 2
T302 HVT BOARD 2
AE SENSOR PCB Scanner home
HVT BOARD 1 SP
J15
J202 J203 J204 J13
position sensor TR
PS1 1 2 3 4 5 6 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7
Scanner
AE Fixing thermistor
Scanner cooling fan
J601 thermistor FM1 TH1
4 3 2 1 J301 1 2 3 TH2 J62 J433
9 1 1
8 2 2
4 7 3
1 2 3 4 3 6 4
J601
4 3 2 1 To ADF 2 5 5 Delivery sensor
1 4 6 PS3
J24F 3 7 3
2 8 2
PR_DC_ON
DV_DC_ON
DV_AC_ON
STBY/CPY*
HEAT_TRG
CPS_REQ
ZER_CRS
1 9 1
RLOFF*
PWOFF
MLOCK
S_OUT
AFREF
HEAT0
HEAT1
S_CLK
FM1D*
+24VR
+24VU
+24VU
+24VR
SCHP
J61
ACK*
MMD
DIG1
DIG1
DIG3
GND
GND
GND
GND
GND
S_IN
GND
GND
DPD
TH2
TH1
+5V
+5V
+5V
AE
1 2 3 4 3 2 1 1 2 1 2 6 5 4 3 2 1 8 7 6 5 4 3 2 1 7 6 5 4 3 2 1 1 2 3 4 5 6 7 8 9
J107 J101 J131 J130 J105 J103 J104 J102
DC CONTROLLER PCB
J109 J113 J132 J114 J108 J110 J106 J111
1 2 3 4 5 6 7 8 9 10 11 1 2 3 1 2 3 4 5 1 2 3 4 5 6 7 8 1 2 3 4 5 1 2 3 4 5 6 1 2 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
LNSLD*
+24VU
PUSLD*
+24VU
RGSLD*
+24VU
MFSLD*
+24VU
GND
LHP
+5V
DIG2
GND
SFPD
CPUSD*
+24VU
+5V
GND
PDP
REQ
GND
ACK
GND
TXD
GND
RXD
GND
RPD
+5V
GND
SC_COM
SC_B*
SC_B
SC_COM
SC_A*
SC_A
SB_LP*
+24VU
DIG0
DIG1
DIG2
DIG3
SEG0*
SEG1*
SEG2*
SEG3*
SEG4*
SEG5*
SEG6*
SEG7*
KR0
KR1
PWOFF
GND
+5V
DSVR
DIG4
2 1 6 5 4 3 2 1 2 1
J52 J51 J58
1 2 1 2 3 4 5 6 1 2
J60 8 7 6 5 4 3 2 1 J751 3 2 1 M 1 2 1 2 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
J601 J602 J301
J53
2 1
J54
2 1
J55
3 2 1 To ADF 2 1
1 2 1 2 1 2 3 M2
Scanner/lens 1 2
Q751 drive motor
J302 J303
Pre-registration roller SIDE BLANK EXPOSURE PCB CONTROL PANEL PCB
paper sensor
J56 3 2 1 J57 3 2 1 J59 3 2 1
SL SL SL SL SL Power switch
SENSOR PCB
J3 VZ1 J4
SL3 SL1 SL2 SL4 PS2 PS5 SL5 PS4 Fixing film
Lens Pickup clutch Registration Multifeeder Lens home Single-feeder Cassette Vertical path roller Varistor 1
solenoid solenoid clutch solenoid pickup solenoid position sensor paper sensor pickup solenoid paper sensor
(Multifeeder (Single-feeder
type only) type only)
ADF
Delivery Registration Original placement
sensor sensor sensor
PI1
PI2
PI3
3 2 1 3 2 1 3 2 1
J201 J202 J203
BR
BL
V
BR
BL
V
1 2 3 4 5 6
J105
6 5 4 3 2 1
2 1
2 1
M1
GY
BR
BR
BR
BL
BL
BL
Pickup motor
Y
V
PDP2*
PDP3*
PDP1
GND
GND
GND
+5V
+5V
+5V
1 2 3 4 5 6 7 8 9
1 2 3 4 5 6 7 8 9
J5
J3
OR
1 2 3 4 5 6 7
1 2 3 4 5 6 7
GN
Y
5 4 3 2 1
5 4 3 2 1
V
GY
W M1 Belt motor
OR
ADF CONTROLLER PCB
J2
GNDL BL
1 2 3 4 5 6 7 8
8 7 6 5 4 3 2 1
1 2 3 4 5 6 7 8
8 7 6 5 4 3 2 1
8 7 6 5 4 3 2 1
RxD W
GNDL BL
TxD GY
To DC controller GNDL BL
ACK V
GNDL BL
REQ Y
J114
J23
J1 J6
Color coding
4 3 2 1 2 1
BK BLACK
4 3 2 1 2 1
BL BLUE
BR BROWN
ADFC
GNDL BL
+24V
GY GRAY
2 1 4 5
1 2 3 4
1 2 3 4
+5V BR
To composite power supply GNDD GN
GN GREEN
+24V OR
OR ORANGE
OR
OR
PK PINK
J202
J24
NO COM
R RED
SB SKY-BLUE
FG Y/GN
V VIOLET
MS1
W WHITE
(M3) (M4) ADF Y YELLOW
Switch
DC CONTROLLER CIRCUIT DIAGRAM
ZER_CRS_LEVEL DC Controller Circuit Diagram (1/8)
E0_BUCK
FM1D D_L_1
R370 RG_PD_CPU