Kenwood KRF-V7771D Service Manual page 20

P Q R
1
ELECTRIC UNIT
(X25-6202-70) (B/7)
IC11,12,51 CLT (CONTROL)
1 MONITOR OUT 13 A 11 B 9 C 8 D 7 E
VIDEO1 L L L L L
VIDEO2 H L H L L
VIDEO3 L H L H L
VIDEO4 H H H H L
AV AUX H H H H H
J4 IC53 PORT P1 P3 P2 P4 P5
(S1 VIDEO)
C119 R110
C 0.022 1
2
R111
75
PLAY IN
C108
100P
C120 R112
Y 0.22u50 1
+
VIDEO 1
R114 C121
C 75 0.022 W185
R138
10K
REC OUT
C110
47P
R113 C122
Y 75 330u16 W189
+
3
C115 R104
C 0.022 1
VIDEO 2 R105
75
PLAY IN
C104
100P
C116 R106
Y 0.22u50 1
+
4
J5
C123 R116
C 0.022 1
R117
75
VIDEO 3
(PLAY IN)
C112
100P
5 C124 R118
Y 0.22u50 1 W188
+
C125 R120
0.022 1
C
R121
75
VIDEO 4
(PLAY IN)
C114
100P
C126 R122
Y 0.22u50 1
+
R101 C129
Q15
C 75 0.022
0.4V 0.5V
R142
1.2V
10K Q15,16
6 MONITOR
OUT V-MUTE
C102
100P
R102 C143
Q16
Y 75 330u16
+
0.8V
0.6V
R136 R135
1.6V
220 220
7
S T U
C139
+5V +5V +5V
0.01
5V
C140
10u50
W200 W216
W218
R156
100
W217
0V
C
IC12 SELECTOR
C134
22P
+5V
R126 R157
20K 10K 0.7V
COMPOSITE
VIDEO SEL.
C138 Q14
22P
Q14,30 0V
IC51
0.7V BUFFER
R158 R159
5.6V
220 360
Q30
0.5V W206
+5V +5V
5.6V
R183 R184 W207
+
5V
360 220
+
Q54
W198 W223 5.6V
W225
R148
+5V
100
Q53
W224
0V
R511
22K
5.6V
Y
IC11
SELECTOR
+5V
+
0.7V
R149
10K
R128 C132
20K 22P
C137
22P
Q12
0V
+
0.7V
R150 R151
5.6V
220 220
Q31
+5V +5V
5.6V
5V 5V 5V
Q12,31
BUFFER
V W X
CAUTION: For continued safety, replace safety critical components only with manufac-
turer's recommended parts (refer to parts list). indicates safety critical components.
For continued protection against risk of fire, replace only with same type and rating
fuse(s). To reduce the risk of electric shock, leakage-current or resistance measure-
ments shall be carried out (exposed parts are acceptably insulated from the supply cir-
cuit) before the appliance is returned to the customer.
+5V
5V
IC90
+5V
PERFECT
MACRO AD
DETECTOR
1.6V
C905 R923 C903
0.6V 47u25 5.6K 1000P
IC90 CONTROL +
1.5V
2
10 V OUT 2 A 3 B
3
VIDEO1 L H
VIDEO2 L L
+
IC91(1/2)
1.6V
VIDEO3 H H
VIDEO4 H L
+5V
2.0V
(X25- ) (D/7)
E11 E12
WH8
1 1
2 2
0.8V 3 3
4 4
5 5
6 6
7 7
5.0V
VIDEO
MUTE
R509 E9 E10
WH3
R510
0.7V
Q55 75 1 1
10K
2 2
5.6V
3 3
4 4
+5V +5V +5V
R501 5 5
10K 8 12
5
7 6 6
C506 6
7 7
5P IC52
(2/2) 8 8
BUFFER
9 9
10 10
BUFFER R181 11 11
560
12 12
IC52
13 13
R192 (1/2)
IC53 5
560
2
0V 14 14
1
R182 3
15 15
7
10K 4
-5.6V
1
V-SEL.
FAN-M IC11,12,51
CONTROL
IC52
IC53
IC90
IC91
Y Z AA
The DC voltage is an actual reading measured with a high imped-
ance type voltmeter with no signal input. The measurement value
may vary depending on the measuring instruments used or on the
product.
+5V
5V
BUFFER INV
C908 5.6V Q52
DC
0.1
VIDEO1
4.9V REC OUT
0.7V
R925 0.3V
1.9V 4.9V
BUFFER
100K
Q52
8 R905 Q901
6
R929 7 10K
D902
100
5
C509
1 4 0V
22P
IC91 8
1.6V
(2/2)
R517
7
W271 10K
10
11
12
+5V
9
C507 2.2u50
+
W194 C128 0.022
C127 0.22u50
+
+5V
J11
(VIDEO/COMPOSITE)
1 PLAY IN
11
1 10
VIDEO 1
R529 C511
75 330u16
4 2 REC OUT
+
5.0V
R912
2 1 1K
C521 Q902
4.2V
2.2u50
3
6 3 PLAY IN VIDEO 2 5V
+
4.9V AVR
+5V
2
4 J9
C505
2.2u50
VIDEO 3
8
+ 1 PLAY IN
6
C144
2.2u50 VIDEO 4
7
2 PLAY IN
+
3
(X11) (E/7)
3 MONI A
MONITOR
OUT
7
8
Q12,14,30,31,52,901 : 2SC4081(R,S)
: SN761200N
Q15,16 : 2SC4213(B)
: MC14577CF
Q53 : UN5119 or DTA113ZUA
: NJU3713D
Q54 : UN5212 or DTC124EUA
: BA7645N
Q902 : 2SA1611(M5,M6)
: NJM4580L
D901,902 : MA111 +B
B
AB AC AD
IC4 : TC9163AF
IC18 : TC9164AF
IC19,20 : NJM4565D
CONTROL UNIT
(X11-3822-70) (B/7)
CN11
1 MUTE 16.3V
2 FAN-ON
3 FAN-H/L
IC19
BUFFER
4 DATA J7 (1/2)
R231 C221
5 CLK 1K 2.2u50 3 8
CENTERch 1 1
+
6 VST 2
7 +5V
R237 100
5V 8 -5V
D
9 TAPE-2
R238 100
10 FRONT-V
6
R232 C222 7
1K 2.2u50 5
11 FRONT-C SWch 2
+
4
IC19
12 FRONT-Y
-16.5V
C238 (2/2)
13 V-GND
150P
16.3V
CN27
IC20
1 GND
BUFFER
(2/2)
VIDEO 4
2 GND
R241 C223
E 6ch INPUT
1K 2.2u50 5
8
3 GND
Lch 4 7
+
6
4 GND
R247 100
E18
WH4 SURROUND
11
CONT-A
R242 R248 100
1K
10 CONT-B
Rch 3
2
9 CONT-P C224 1
2.2u50
3
+
8 GND 4 -16.5V
J3
IC20
R41
1K (1/2)
Lch 2 8
7 +5V
+5V F
VIDEO 4
PLAY IN
R42
1K
Rch 1 12
6 SYNC
5 V-1
4 V-2 R45
1K
3 V-3 Lch 4 7
2
V-4
VIDEO 3
1 WIDE
PLAY IN
R46
1K
Rch 3 4
J4
R53
1K
Lch 2 6
VIDEO 2
PLAY IN
R54
1K
Rch 1 3
R57
220
Lch 4 6
VIDEO 1
REC OUT
R58
220
Rch 3 5
R61
1K
Lch 6
VIDEO 1
PLAY IN
R62
1K
Rch 5 2
SIGNAL LINE
GND LINE
B LINE
B LINE