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KRF-V7771D
Service manual
Kenwood KRF-V7771D Service Manual page 31
Audio video surround receiver
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Also See for KRF-V7771D
:
Instruction manual
(77 pages)
,
Service manual
(62 pages)
,
Setup
(12 pages)
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DQ
DR
X25
-A/7
POWER AMPLIFIER UNIT
-E7
(X07-294X-XX) (A/8)
5/6
CN1
10
10
Cch
1
9
9
S
8
8
SRch
Q1-10
7
7
FINAL TR.
6
6
Rch
IDLE
5
5
TEST
PIN
4
4
SLch
3
3
2
2
Lch
1
1
IDLE
FLch
2
Q11-14,51-54,101,102
CURRENT LIMMIT
IDLE
FRch
3
CN10
29
VC
-VC
28
+VC
+VC
27
GND
26
NFB
25
Cch
BIAS+
BIAS-
24
GND
23
NFB
22
BIAS+
21
SLch
X25
BIAS-
20
-A/7
GND
19
-CN51
NFB
18
5/6
SRch
BIAS+
17
BIAS-
16
4
R
GND
15
NFB
14
BIAS+
13
Lch
BIAS-
12
GND
11
NFB
10
Rch
BIAS+
9
BIAS-
8
GND
7
FAN
+B
6
+B
SECOND
5
5
RELAY
CS
4
4
CONT.
POWER
3
3
FAST/SLOW
2
2
FAN
CONT.
ON/OFF
1
1
5
IDLE
SRch
BRSP
6
X08-
C/7
-CN15
3/6
IDLE
K
Cch
X08-
C/7
-CN13
3/6
L
VC
+VC
7
+B
DS
DT
Q11-14,51-54,101,102
R27
CURRENT LIMIT
R35
D5
D11
100 1/4W
39K
1.0V
+VC
Q1
3
54.4V
+
R1
53.4V
47 1/4W
1
0V
R11
R33
3.3K
Q11
4
150K
+
0.4V
2
R31
1/4W
0V
D9
0V
33K
5
0V
0.3V
Q13
0V
Q3
1
-1.0V
4
+
2
R3
47 1/4W
0V
5
+
-54.4V
3
VC
1
6
R28
R36
D6
D12
100 1/4W
39K
1.0V
+VC
Q2
3
54.4V
+
R2
53.4V
47 1/4W
1
0V
R12
R34
3.3K
Q12
4
150K
+
0.4V
2
R32
1/4W
D10
0V
33K
0V
5
0.3V
Q14
0V
Q4
1
-1.0V
4
+
2
R4
47 1/4W
0V
5
+
-54.4V
-1.0V
3
VC
5
4
R77
R85
D55
D61
100 1/4W
39K
1.0V
1.0V
+VC
Q5
3
54.4V
R51
53.4V
47 1/4W
1
0V
R83
R61
150K
Q51
4
3.3K
R81
0.4V
2
D59
1/4W
33K
0V
5
0V
0.3V
Q53
0V
Q7
1
IDLE
-1.0V
4
SLch
2
BLSP
R53
47 1/4W
0V
5
-54.4V
-1.0V
3
VC
3
R78
8
D56
D62
100 1/4W
R86
39K
1.0V
+VC
Q6
3
54.4V
R52
53.4V
47 1/4W
1
0V
R84
R62
150K
3.3K
Q52
4
0.4V
2
D60
R82
1/4W
0V
33K
0V
5
0.3V
Q54
0V
Q8
1
-1.0V
4
2
R54
0V
47 1/4W
5
-54.4V
-1.0V
3
VC
7
R114
10
D103
D106
100 1/4W
R118
39K
1.0V
+VC
Q9
3
54.4V
+
R101
53.4V
47 1/4W
1
R117
R106
Q101
3.3K
150K
4
+
0.4V
2
R116
1/4W
0V
D105
0V
33K
5
0V
0.3V
Q102
Q10
1
-1.0V
+
4
2
R102
9
47 1/4W
0V
5
+
-54.4V
-1.0V
3
VC
+VC
DU
DV
+B
K1
A SP.
ON/OFF
R9
C5
C7
0.33 0.33
2.7 1W
C6
C8
0.33 0.33
+B
K2
B SP.
ON/OFF
C57
C55
0.33
0.33
SURROUND SP.
ON/OFF
+B
K3
K4
C SP.
ON/OFF
+B
D254
53.7V
D163
+
PROTECTION
53.4V
53.3V
53.4V
Q163
0V
63.6V
Q161
0V
Q162
Q203
+
0V
3
1
D161
2
FAN HI:27.2V
R214
R215
FAN DRIVE
FAN
LO:13.3V
1K 1/4W
1K 1/4W
ON/OFF
Q211
FAN HI:14.2V,LO:0V
FAN ON:0V
OFF:1.4V
FAN
Q212
R212
Q215
HI/LO
1K
R211
1K
HI:0V
1
D213
2
0V
Q213
+VC
+VC
+B
VC
3
Q153
Q152
Q151
SUR.SP.
B SP.
A SP.
ON/OFF
ON/OFF
ON/OFF
DRIVE
DRIVE
DRIVE
ON:0V
ON:0V
ON:0V
ON:0V
OFF:30.4V
OFF:29.0V
OFF:29.0V
OFF:29.0V
Q153
Q152
Q151
ON:4.3V
VC
OFF:0V
ON:4.3V
ON:4.3V
OFF:0V
OFF:0V
4
5
R256 220K
R257
10K
R255 220K
+B
DW
DX
WH1
J1
1
Lch
A SP.
2
Rch
FRONT SP.
3
Lch
B SP.
4
Rch
J2
1
Lch
SURROUND SP.
2
Rch
3
CENTER SP.
(X11- ) (G/7)
P1
P2
CN6
WH6
R41
Lch
3
R556
1
10
470 2W
GND
2
PHONES
2
R42
R555 10
Rch
1
J21
3
53.7V
470 2W
E8
R166
47K
(X07-) (G/8)
Q164
0V
TEMP.
SW
E11
E13
(105 C)
WH11
3
3
0V
R207
2
2
D162
10K
1
1
CN7
Q214
29.0V
1
1
1
+VC
2
2
2
COOLING
54.4V
FAN
3
3
3
+
FAN
HI:26.7V
LO:12.7V
(X07-) (H/8)
OFF:0.3V
D251,252
+
CONNECT
+
+
+
ON/OFF
WH12
3
3
2
2
TEMP.
SW
1
1
R251
(65 C)
470 1W
E12
E14
+VC
+B
+B
-VC
+B
3
D201
0V
4.2V
Q202
R203
33K
4.2V
TEMP.
D251,252
CONNECT
LEVEL
+
ON/OFF
DETECT
0V
Q201
DRIVE
Q154
W193
E10
ON:4.3V
OFF:0V
WH10
DY
DZ
(X25- ) (E/7)
E6
9
8
7
6
5
T1
4
23
3
22
2
W5
21
1
W4
20
19
(X07-) (B/8)
18
17
WH14 RED
16
WH16 YEL
WH18 BLK
15
WH17 WHT
14
WH15 GRY
13
12
11
10
(X07- ) (C/8)
E6
WH6
POWER
6
FAST OFF
5
+BR
4
uCOM +B
3
uCOM GND
2
+BZ
1
C254 0.01
D251
C255 0.01
-VC
C257 0.01
+
+
+
D252
K5
-35.0V
-35 AVR
C258
-34.5V
W196
-52.2V
0.01
-54.4V
B
Q311
POWER ON:0V
STAND BY:12.9V
R303
Q301
POWER
4.7K
ON/OFF
POWER ON:0.7V
DRIVE
STAND BY:0V
SIGNAL LINE
GND LINE
B LINE
+B
B LINE
B
K
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