Kenwood C-v751 Service Manual

KMOQSLNPRT
2 1
3
5
7 4
6
R83 R82
R106 R84R79
R219
R220
R221R81
R80R85
R216
R96
R217
R100 R214
R86
R105R101
R104
R50
R45 R43
R73R72 R77 R78
R76R75
R67
R68
R71 R70 R69
R162
R163
R164R161
R165
R166R155
R149
R150
R152
R159
R160R156R157
R158
R193
R180
R123 R124
R119
R120 R127R128 R125
R126
R209
R208
R210
R129
R141
R142R143
R147
R148
R144
R145
R146
R131 R132
R130
R137
R138C95
C96 C100
C99
C97
C98
C70
C66
C79
C86
C85
C149
C131
C132
C150
C151
C152
C120
C126C125C17C15
C14
C29
C13
C53
C54
C51
R18
C52
C64
C65
C60...

UVXZABADWYAAAC
2 1
3
5
7 4
6
C4
C25 C24
C7
C15
C3
C19
C8 C81
C82
R5
R18 C22
C6
C23
R1
R4
R19
R3R2 R20
R84
R83
UCOM
DATA
CLK
STB
DATA
CLK
STB
+15
GND
+15
SR
SL
SW
SW
CEN+B
+15
DATA
CLK
STBDET
UGND
FR
DGND
Rch +15
DGND
UGND
IR
H1 IRGND
UCOM+B
GND
+15
3dB SR
FR
FL
GND
+15V
-15V
CEN
GND+15
DATA
CLK
STB
R82
R81
R103 R104
R105 R101R102
R106
R121R122
R120R118
R119
R123
R127
R128
R126
R124
R125
R107 R108
R116
R117
R115R113 R114
R174 R173
R302R386
R385
R129
R216R217
R218R213
R214R215
R205
R206
R201
R202
R210R211...

GND FM 75J1
Q1 D1FM TUNED
PLL
D4
Q14CN2
CN1
Q2
D3 D8
D9Q10
Q11
Q12
D5
D13
AM ANT
WH2 X08-
3/5 D11 : 2SK302
: 2SC2413
: SVC220 or : 2SC2714
KV1440 D1-4 FET1
TR1
TR2,3D1FET1
D4
BUFFER OSC TR2
TR3
OSC
D3 D2
RF AMPFM FRONT END
DISTORTION(ST)
TR1 MIX IC1 :
IC2 : LC72131
Q1,6,7 : 2SC4177(L5,L6) or
Q2,12,14 : 2SA1611(M5,M6) or
Q10,11 : 2SD1757KD1 : DA204U or
D3 : RD8.2ES(B2) or
D8,11,13 : MA111RD5.1ES(B2) or D4 :
RD3.3ES(B2) or D9 :RD2.7ES(B2) or D5 :
GND LINE SIGNAL LINE
B LINE
B LINEMTZJ3.3(B) or MTZJ2.7(B)...

KLNPRTMOQ S
2 1
3
5
7 4
6
D81
PLL
D31
CN2DISCRI
Q31
Q81FM +B VT
DISCRI IC1 : LA1836
IC2 : LC72131D1,2,32,61,62 : 1SS133 or
D31 : RD8.2ES(B2) or
D62
D61
HSS104
HZS8.2N(B2)TR3
: 2SC2413
KV1440 : SVC220 or : 2SK302
: 2SC2714 J2
FET1
TR2,3 TR1
D1-4 GND
AM ANTFM 75J1
OSC
D4
TR2
D2
FET1 RF AMPFM FRONT END
TR1
BUFFER OSC D1
D3
: 2SC4081(R,S) or
2SC4116(Y,GR) Q1,2,4,31-34,61,62
2SA1586(Y,GR) : 2SA1576A(R,S) or Q3,64,81,103
: 2SD1757K Q101,102D81 : RD5.1ES(B2) or
HZS5.1N(B2)
D101 : RD3.3ES(B2) or
HZS3.3N(B2)
D102...

Y05-3942-70
C-V751
UWYVX
Q32
D32AM/FM
SYSTEM /MPX
ON:FM
OFF:AMRch
CN1
3/5 E1 X08- Q34 Q33
Q102 Q101
Q103
D101
Lch
D102
MUTEMUTE
DRIVES METER BUFFERBUFFER DET-OUT
IC1 (X05-4680-51)
C-V751 (2/5)B
7.7V14.4V
7.0V
3.8V
3.4V
4.3V
4.3V
3.7V
-15.1V
7.0V (0.2V)0V
0V
(2.3V)7.0V
(3.9V)
0V
(0.6V)
14.5V
8.1VMUTE
ON: 0.7V
OFF: -2.2V
0V 0V
0V
-2.7V
4.9V
OFF :4.7V ON :0.4V MUTE
DET
12
13
14
15
MUTE
PILOT FFTRIG SW STEREO
18 20
19
17
16 R32 5.6K
10u10C38
+
C30 0.047
R33 1u50C40
+
0.47u50C41+
3K
C42
2.2u35
+
47K R49
R34...

ZAA ACAB AD
2 1
3
5
7 4
6J1
COAXAL IN
2nd DSP A1
OPTICAL IN
CD
DVD
INPUT DIGITAL
SELECTOR
CODE IC DSP
PROGRAM WH1 WH2EXPANDER ADDRESS PORT
DSP IC D30 : UDZ5.6B D19,20 : UDZ6.8B
D16,17 : U1BC44 D11,12,18,26-29,31,32
: MA111 D7,8,13,14 : DA204U D6,24,25 : UDZ13B
D1,2,4,21-23 : UDZ5.1B Q10 : UN5112 Q6 : 2SB1218A(Q,R)
Q5,7 : 2SD1819A(Q,R)
Q1-4,8,9,11-15 : UN5212 IC28 : M62446FP IC26 : NJM2279M
IC25 : TC9162AF
IC24 : S-80740AL-A4
IC23 : uPD17215GT-737
IC17 : TA78DL05S
IC16 : CXP740010-107Q
IC15 : CS4226KQG...

AN
AE AG AI AK AMAF AH AJ AL
DIR
A/D,D/A
CONVERTER
u-COM
D13
D11D12
D14
D26 1st DSPD8 D7
DECODER RDSBUFFUR 3 STATE
DIGITAL AV R 3.3V
AV R 3.3V
3 STATE
BUFFER
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
1
2
3
4
5
6
7
8
9
10
11
34
35
36
37
38
39
40
41
42
43
44
SDIN2
SDIN3
CLKOUT
ERR
XTO
XTI
DEM
AOUT6
AOUT5
AOUT4
AOUT3
AOUT2
AOUT1
AGND1
VA +
AGND2
FILT
CMOUT
AINAUX
AIN1L
AIN1R
FREQ1
RX4
HOLD
CCLK
CDOUT
CDIN
CS
SPI
PDN
AUDIO
AC3
FREQ0
SDIN1
SDOUT2
SDOUT1
LRCK
SCLK
DGND2
VD+
DGND1
RX1...

AOAP AR AT AV AXAQ AS AU AW
IC13
(1/2)
IC13
(2/2)
SELECTOR VIDEO
IC14
(2/2) (1/2)IC14IC20
(2/2) (1/2)IC20
L R (Sch) OPE AMPLSch
(Cch/SWch) OPE AMPRSch
Cch
SWchRch
Lch (FRONT) OPE AMP
(BOTTOM VIEW)
VOLUME ELECTRIC
CN5
CN2CN3/TONE
D20 D19
DIGITAL/ANALOG
SWIC27
(1/2)Rch MIX AMP. (2/2)IC27
Lch MIX AMP.
D27Q10
Q8
Q9
D31
D32Q12 Q2 Q1
Q3 Q4
D21 D22
D30
D17 D16
D18
Q7 RESET RESET ICQ11D29
CN4 Q15 Q13 Q14FRONT ch.
3dB DOWN DRIVER TR.
(Q8,9)
DRIVER MOTOR
D28
LED
DRIVER BUFFER 3 STATE IC22
(1/2)
IC22
(2/2)
D23Q6
Q5...

AY BA BCAZ BB
C-V751
Y05-3942-70
J3
VIDEO1 IN
2 1
6ch IN VIDEO2 IN OUT MONITOR
VIDEO1
REC
J4
P1SYSTEM
CONTROL
CN6
MOTOR
(MSN5F095A) PH5P(WHT)
CNLEVER SW
(SSS-23) J2
GND LINE SIGNAL LINE
B LINE
B LINE C-V751 (X08-299X-XX)-CN13 X11-A/4
4/5
-CN12 X11-A/4
4/5 -CN2 X14-D/4
5/5 -CN1 X14-A/4
5/5
47P C203
C219
47P R203
75 C221
47P C220
47P
SBUSYS D ATA
C187
220P
220PC191
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1CENTER
-15V
SW
+15V
SR
GND
SL
GND
FR
GND
FL
GND
AD-Rch...

BDBE BGBF BH
2 1
3
5
7 4
6
1
VSS
COMVDD28
25 27
26
24
23
DVD
TUNER
COMDAC
13
14
GND22
21
20
19
CK15 16220K R103
1K R101220PC1011K R102
R104
220K C102
220P
470
R107220P C103
R106220P C104
R108R105
470
220K 220K C110
R120
220K 220P
R118
470
C109
220P
R119
470 R117470
220KR115220P C107
R114220P
C108
R116R113
470
220K 220K
1K R122
C112
220P
R124
R121
C 111
220P
R123
1K
220K 220K R136C118
220K 220P
R134
4701K
C117
220P
R135
470 R133
220K
R130
C116
220P
R132
R129
C115
220P
R131
1K
220K 220KR127C113
220K 220P...