JVC KW-XC777 Schematics
Block diagram
PICKUP
CD
MECHA
IC502
REMOCON
REMOTE
CN601
CDON
VA,VB,VC,VD,VE,VF,LD
TRACKING+
TRACKING+
FOCUS+
FOCUSSPINDLE+
SPINDLELOADING+
LOADING-
IC661
DRIVER
CD
FOO
TRO
DMO
FMO
LM0
LM1
KEY
SWITCH
KEY1
KEY3
IC601
RF AMP
RFGC
RF
RFRP
FE
SEL
TEB
CN501
CD-RW
IC621
DSP
DAC
CN701
Lch
Rch
J1
ANT
IC961
CD LPF
IC761
JVC
BAS
SEEK
MONO
FM/AM
IFC
IC2
PLL
PLLCE
PLLDA
PLLCL
PLLDI
BUSSI
BUSSO
BUSI/O
BUSSCK
TU1
FM/AM
TUNER
SD/ST
S.METER
RESET
REMOTE
KEY0
KEY1
KEY2
KEY3
LCDCE
LCDRST
LCDSCK
LCDDATA
TU-L
TU-R
IC701
CPU
CD-L
CD-R
VOLSCK
VOLSO
IC951
E.VOL
KW-XC777
IC901
POWER IC
FRONTL+
FRONTLFRONTR+
FRONTRREARL+
REARLREARR+
REARR-
FRONTL+
FRONTLFRONTR+
FRONTRREARL+
REARLREARR+
REARR-
KEY
SWITCH
FRONT
LED
MAIN
MOTOR
SUB
MOTOR
HEAD
KEY2
WR501WR502
RESET
ILL
CN403
TAPEIN
MODE
REEL
PHOTO
MOTOR
STANDBY
CJ402
LCD1
SUBMO+
SUBMO-
HEAD AMP
IC402
MOTOR
DRIVER
IC401
LCDDDATA
COM1~
COM8
SEG1~
SEG75
SUBMO+
SUBMO-
LCDRST
LCDCE
LCDSCK
IC501
DRIVER
BUSSI
BUSSO
BUSSCK
IC431
CPU
FF/REW
DIRECTION
DOLBY
MS
LCD
AUX-L
AUX-R
IC461
BUFFER
PREQ
SI/SO
RESET
P.DET
PJ501
AUX IN
SCK
SI/SO
TAPE-L
TAPE-R
BACK
LIGHT
LED
CN401
CN972
CN971
CD-CH
AUX-L
AUX-R
SCK
SI/SO
MEMORY
CH-L
CH-R
CN973
MEMORY
SI/SO
SCK
CN702
TAPE-MUTE
TAPE-DET
TAPE-RESET
TAPE-PREQ
CH-L
CH-R
TAPE-L
TAPE-R
Each block
CN951
LINE OUT
IC911
REG
CN911
SPK
BATT
-
L
Standard schematic diagrams
Main amp section
TU1
QAU0223-001
J1
QNB0100-002
L1
4.7
0.01
0.01
1SS355-X
1SS355-X
D1
CN701
QGB1004K1-20
CN702
QGF1016F3-21
IOP
CDON
9V
LM1
LM0
REST
SW1
SW2
SW3
SW4
CD-Lch
CD-Rch
BUS0
BUS1
BUS2
BUS3
BUCK
CCE
LSI_RESET
CDRW
D2
100
0
7P10P
B24
C35C34
IC21
TB2118F-X
C24
0.001
R28
2.2k
PLLCE
R27
2.2k
PLLDA
R26
2.2k
PLLCL
R25
2.2k
PLLDI
SEEK
ANT
MONO
FM/AM
R182
D182
1k
R282
1k
L999
47
L942
47
47P
10k
10k
4.7k
R23
C39
0
R24
0.047
R33
R32
C23
D181
UN2211-X
0.01
C941
0.01
C942
L941
10
100p
AUX-Lch
AUX-GND
AUX-Rch
KEY0
KEY1
KEY2
KEY3
ON5V
LCD-RESET
LCD-CE
LCD-SCK
LCD-DATA
ACC5V
D185
UDZS6.2B
Q941
RST-OUT
GND
CH-Rch
CH-Lch
100p
C783
100p
C784
MUTE-OUT
TAPE-PREQ
0.01
C943
TAPE-Rch
TAPE-Lch
X21
QAX0616-001Z
C22
R31
C36
0.001
C33
10P
R30
39k
0.01
C32
10/16
C30
C31
C29
0.047
0.047
C26
0.01
C25
0.01
22
C21
R21
220/10
0
R22
22/16
IFC
AJ
ILL
L782
SI/SO
1.8
C781
SCK
L781
1.8u
47k
R783
C38
0.047
Q918
UN2111-X
0.01
C708
47k
R776
C782
R777
100
R782
R781
22k
R29
C27
Q919
UN2211-X
R775
100
C9
C1
C2
220/10
C37
0.001
Q2
2SB815/7/-X
2SB815/7/-X
R4
10k
10k
0.0027
C28
0.01
MA152WK-X
D3
R5
2.2k
8.2
R8
100k
R774
10k
R780
R925
27K
B-LED-CONT
22k
R779
330
R784
22k
IC761
C771
0.022
100k
R778
HD74HC126FP-X
L21
47
KW-XC777
R291
4.7k
R281R181
R705
C703
R271
R241
R141
R171
R191
0
0
100k100k
0
0
4.7k
D81
MA152WK-X
820
8P
C704
TEL
1k
R726
C271
C171
LCD-RESET
2.2k
R747
27P
QAX0401-001QAX0617-001Z
R192 R 292
VOLSCK
1k
R746
R706
C705
C182
22/6.3
R81
R707
10M
27P
X702X701
C291
1/50
C272
1/50
R242
R142
C172
1/50
C191
1/50
C81
1/50
1k
R745
47k
C706
C242
1/50
C281
4.7/25
C181
4.7/25
C142
1/50
D84
CRS03-W
R82
180k
R83
22k
47k
2SD601A/RS/-X
SW3
SW4
REST
1K
1k1k1k
R790
R708
22P
C956
R84
12k
1k
R709
Q81
SW2
UN2211-X
2.2/50
2.2/50
C246
C247
2.2/50
2.2/50
C147
C146
D183
D184
C952
100/10
R86
PLLCL
PLLDI
1k
R712
TAPE-PREQ
10/16
D83
C82
1SS355-X
0.047
C84
D82
R87
270k
0.22/50
1SS355-X
1k
C83
22/16
0.01
C963
47k
R743
SD/STKEY0
PLLCE
PLLDA
47k
R742
47k
R741
1k
R744
47k
R740
47k
R739
R736
R733
R735
R734
R732
R731
R730
R729
R727
R728
R725
R721
R720
R719
10k
R714
3.3k
R718
47k
R717
R716
R715
TH795
47k
NAD0028-103X
47k
10K
R795
47/6.3
2.2k
C791
R792
C953
R85
390
LM1
LM0
R710
R711
SW1
Q701
CH-Rch
TAPE-Rch
CD-Rch
TUNER-Rch
AUX-Rch
47
R1
C4
0.01
C11
10/16
C212
FM/AM
Q3
4.7/25
C112
4.7/25
R6
10k
0.018
0.018
C111
C211
1k
R7
Q4
UN2211-X
R756
R757
R758
R760
R761
R762
1u
C799
CDON
1k
R759
0.01
C798
R797
R796
47K
R755
R786
R787
R788
47k
R789
R799
R764
R765
MUTE-OUT
R766
RST-OUT
R767
330
R768
BUS0
330
BUS1
R769
330
R770
BUS2
330
R771
BUS3
R772
CDRW
3.3k
BUS_SI
BUS_SO
BUS_I/O
BUS_SCK
C6
10k
10k
0.01
C5
IFC
10k
1k
1k
R9
SEEK
1SS355-X
R2
S_METER
R211
4.7k
R111
4.7k
D91
1SS355-X
R773
0.1/50
Q1
UN2211-X
SD/ST
12k
12k
680P
R215
R115
C213
D90
Q91
UN2111-X
C91
47/6.3
D92
47k
IC701
@UPD784216
MONO
4.7/25
4.7/25
680P
C113
Q943
UN2213-X
C214
C114
22k
0.01
C8
R3
1SS355-X
CCE
LSI_RESET
330
1k
R754
R753
AUX-GND
AUX-Lch
TUNER-Lch
CD-Lch
TAPE-Lch
CH-Lch
R147
120k
R247
120k
BUCK
1k
R752
1k
R704
220/10
0.01
C702
C701
2.2/50
2.2/50
C248
C249
2.2/50
2.2/50
C148
C149
C710
C709
C733
LCD-CE
2.2k
2.2k
LCD-SCK
LCD-DATA
2.2k
BUS_I/O
1k
BUS_SCK
1k
BUS_SO
1k
BUS_SI
1k
1k
1K
IOP
1k
S_METER
10k
KEY3
10k
KEY2
10k
KEY1
3.3k
3.3k
3.3k
R722
R724
R723
IC791
IC-PST9333U-X
KW-XC777
IC951
M61508FP-X
10/10
1/50
C955
C951
C954
1/50
0.01
0.01
47
L701
L702
100
100p
C714
47/6.3
C715
0.01
47k
C792
D791
R791
1SS355-X
C201
UN2211-X
0.01
C928
R201
1/50
0
R202
0
Q232
Q231
R101
0
R102
0
Q131
Q132
1k
R904
27k
4.7/50
Q901
R903
C905
HA13164A
R926
15k
3.3k
4.7k
22/16
22/16
R927
C915
C916
R915
Q911
UN2211-X
R917
4.7k
100k
C921
R916
22/16
R221
20k
C202
1/50
R222
20k
330P
330P
R205
R206
C203
C204
C101
1/50
R121
20k
C102
1/50
R122
20k
R105
R106
D903
27k
C903
R902
D913
CRS03-W
0.1
D912
CRS03-W
C913
R913R914
1k9.1k
2.2/50
C914
IC901
LA4743K
0
R908
C908
330P
330P
0.01
C901
C902
C906
47/16
C103
C104
D101
MA152WA-X
R134
R133
3.3K
3.3k
Q102
Q101
100
R161
2.2k
2.2k
R912
R911
C232
C131
B131
0
1K
1K
R131
R132
R162
QNN0175-001
D201
MA152WA-X
1K
3.3K
3.3K
R233
R234
R231
Q202
Q201
100
R261
QMFZ047-150-T
100
R262
100
CN951
10/16
D989
D990
D991
D992
L911
2200/16
1N5404-TU-15
QQR0703-001
D993
D994
D995
D996
C911
D911
1K
R232
C909
D981
D982
D983
D984
D985
D986
D987
D988
100P
C991
100P
C992
100P
C993
100P
C994
100P
C995
100P
C996
100P
C997
100P
C998
0.1
C981
0.1
C982
0.1
C983
0.1
C984
CN911
QNZ0002-001
R203
0
R204
0
47k
47k
R209
R208
R103
0
R104
0
47k
47k
R108
R109
Q903
UN2111-X
R235
R135
R236
R136
D231
100/16
100/16
10k
0.1
CRS03-W
CRS03-W
UDZ11B-X
C904
D901
D932
D933
R931
C931
ACC5V
AJ
CD8VCD8V
ILL
220/10
C920
47k
220/10
C930
R929
ON5V
TEL
Q920
CN706
Q914
2SB709A/QR/-X
C926
R928
C944
1SS355-X
D914
R971
0
D917
0.1
10/16
C925
C919
PS2B-LED-CONT
5.6k
18k
R921
R922
D131
D902
1SS355-X
0.01
C990
IC911
0.1
47K
0.1
22/16
220/10
C927
C922
C917
C918
R907
R918
47k
Parts are safety assurance parts.
When replacing those parts make
sure to use the specified one.
TUNER SIGNAL
TAPE SIGNAL
CD SIGNAL
CD CHANGER SIGNAL
AUX IN SIGNAL
FRONT SIGNAL
REAR SIGNA
2-2
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