A-5
1 2 3 4 5 6 7 8 9 10 11
J109
+24VU
+24VU
GND
+5V
+24VU
+24VU
1
2
3
4
5
6
1 2 3 4 5 6
J51
1
J52
2
2 1
J53
2
1
1
2
SL
SL3
SL1
SL
SL2
J54
SL
1
2
2
1
1
3
2
3 2 1
J55
SL4
SL
2
3
1
J56
PS2
J71
PS5
2
3
1
DIG1
+24VU
3
J132
1 2
4 5
+5V
+24VU
GND
SL5
SL
SL6
LA2
CNT1
SL
1
2
J58
2
1
J59
PS4
2
3
1
3
GND
J114
1 2
GND
GND
4 5
GND
6 7 8
J60
1
2
3
4
5
6
7
8
J108
2
1
3
GND
+5V
J751 3 2 1
Q751
J110
2
1
5
4
3
6
J121
2
1
5
4
3
6
M
M2
J106
1 2
+24VU
J122
1 2
+24VU
J602
1 2
J601
2
1
J801
1
2
J70
1
2
CNT
J3
VZ1
J4
J111
DIG0
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
DIG1
DIG2
DIG3
GND
+5V
KR6
16
3
J301
2
1
5
4
11
8
7
6
10
9
14
13
12
15
19
18
17
20
DIG4
20
2
1
2
1
J302
J303
J102
1
7
4
2 3
6
5
9
8
DIG1
DIG1
GND
DIG3
GND
1
2
3
4
5
6
7
8
9
9
8
7
6
5
4
3
2
1
1
2
J62
1
PS3
3
2
J61
J433
TH1
J103
2
3
4
5
6
7
8
9
J203
1
4
3
2
6
5
7 8
1
9
7
J104
6 5 4 3 2
2
J204
1
4
3
5 6 7
1
6
2
GND
J105
GND
+24VR
+5V
5
6
+5V
+24VU
3
4
J202
2 3
1
5
4
1
1
4
3
2
J107
1
3
2
4
GND
+24VR
J119
1 2
+24VU
J601
3
4
3
2
1
1
2
4
AE
1
J301
PS1
3
2
J601
3 2
4
1
J101
3
+5V
GND
1
2
J131
2
1
GND
TH2
+24VU
J130
1 2
FM1
J24F
J910
2 3
1
J214
J215
2 3
1
1
2
J201
1
2
J501F
J501
1
2
JP502
FT4
FT2
H
N
FT1
FT3
JP501
J1
N
FT1
J1
H
P1
P1
FT2
J501
NF1
NF1
FT3
DS1
DS1
1
2
FT4
LF1
J502
2
1
T302
J213
J212
J209
BP704
BP702
BP703
BP701
BP706
BP707
BP705
J14
J15
VZ2
J13
SP
TR
J12
J11
PR
DV
J205
3 2 1
4
GND
+24VU
1
3
2
4
M
M1
J901
J2
2 1
J207
1
2
2
1
J434
2
1
J16
J15
H1
J17
FU2
FU1
FT6
FT5
LA1
DEV_BIAS
3
1
2
J954
J952
GND
Line filter
220/240 V
120 V
SEG0*
SEG1*
SEG2*
SEG3*
SEG4*
SEG5*
SEG6*
SEG7*
KR0
KR1
DSVR
HEAT0
HEAT1
Varistor 2
Dev. antenna
S_IN
S_CLK
S_OUT
ACK*
REQ
ACK
TXD
RXD
Varistor 1
Fixing film
DC CONTROLLER PCB
COMPOSITE POWER SUPPLY PCB
HVT BOARD 1
HVT BOARD 2
MAIN MOTOR
DRIVER PCB
TONER LEVEL
DETECTION PCB
SIDE BLANK
EXPOSURE PCB
PRE-EXPOSURE
PCB
CONTROL PANEL PCB
Power switch
NOISE FILTER PCB
NOISE FILTER PCB
AE SENSOR PCB
SENSOR PCB
Door switch
Door switch
Scanner home
position sensor
Scanner
thermistor
Scanner
cooling fan
AFREF
AE
SCHP
TH2
FM1D*
LNSLD*
PUSLD*
RGSLD*
MFSLD*
LHP
Lens solenoid Pickup clutch
solenoid
Registration
clutch solenoid
Multifeeder
pickup solenoid
Lens home
position sensor
Waste toner
sensor
Cassette pickup
solenoid
Primary charging
roller cleaning solenoid
Total copy
counter
Vertical path
roller paper sensor
To ADF
CPUSD*
PDP
RPD
Pre-registration
roller paper sensor
SC_B
SC_B*
SC_COM
SC_A*
SC_COM
SC_A
Scanner / lens
drive motor
SB_LP*
PCSLD*
TCNTD*
PWOFF
Delivery sensor
Fixing thermistor
TH1
DPD
RLOFF*
PR_DC_ON
MMD
DV_AC_ON
DV_DC_ON
STBY/CPY*
TNMONI
PWOFF
MLOCK
HEAT_TRG
ZER_CRS
Main motor
MLOCK
MMD
Fixing heater
Thermal fuse 2
Thermal fuse 1 Scanning lamp
TNFULL
PEXP*
To ADF
CPS_REQ
C. General Circuit Diagram
1. Copier
Summary of Contents for NP6412
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