Kenwood KRF-V7070D Service Manual page 12

AE AF
(X09-6760-10) (A/5)
R387 470
PROTECTION
10
Q355
12
Q31,33
∗
Q52,54
POWER R381 R383
AMP POWER
30K
C357
AMP
4700P
Q31 Q33
Q52
20mA
R147
220 1/4W 20mA
VR3
470
IDLE ADJ.(SLch)
C133
22u50
1.2V -1.2V C184
+ 1.2V 22u50
C127
560P 46.8V +
C178
Q29
560P 46.8V
R133
2ND
Q25
R137
R184
220 330 1/4W Q46
46.2V -46.8V
1/4W
220
46.2V -46.8V
1/4W
D3
R131 R135
33.3V
R139 47K
D6
R182 R186 33.3V
220 5.6K
C135
1/4W 1/4W C125 10P
Q27 220 5.6K
47P
C186
Q25 1/4W 1/4W
∗ C123
Q46
CURRENT R129 220u10
MIRROR CURRENT
+
MIRROR
C121 100P
0V
R127
D29
Q23 1.5K
-46.2V
R121 R172
6.8K 6.8K
0.6V 0.6V
R125
1st 1st
1.5K
Q21
-46.2V
C115
330P
R117
47K
R433
Q333 1K
SURROUND Lch R113 SWch
D
100K
+15.4V
+B
+47.2V
48.3V
C611
+ 22u50
80
5 3 1 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 9 8 7 6 5 4 3 2 1
CN6
4 2
X14-A/11- X14-A/11-
4/4 4/4
WH92 WH91
BF-5 BF-6
AG AH
+B
Q365 R475
R408 470 7.5K
AMP.DC
PROTECTION
PROTECTION C368
R410 4.7u50
33K
+
Q358
Q364
R473 R474
∗
1.5K 3.3K
R402 R404
30K C360
R472
Q363 10K
4700P Q54
R471 C367
1K 220u10
R198
+
220 1/4W
C370
1000P
R469
VR6 Q362
D65
7.5K
470
IDLE ADJ.(SWch)
C366
4.7u50 SUPPLY
+ PROTECTION
-1.2V
R467
1.5K
Q361
Q50
D66
2ND R188
330 1/4W
R466
R190 47K
Q360 100K
C176 10P
D68
Q48
47P
∗ C174 R463 82K
R180 220u10
C365
+ R464 82K R465 100 220u 10
C172 100P +
0V
R461 15K R459 22K
R178 R462 15K R460 43K
D30
Q44 1.5K
R458 82K
-46.2V 1
R457 82K
2
R476
47.2V
560 1/4W
R176 +12V
1.5K D69
Q42
-46.2V
C166 Q359 D63
R454
330P
MUTE
390 1W
DRIVER
R456
R168
47K 10K
Q359
-6dB ATT.
DRIVER
R609
R436
Q336 1K
10K R610
10K
R164 90
R453
Q607
100K
C364 360
2.2u50
∗
R470 22K
R607 100K
∗
C369
ON : 3.2V
OFF : -11.8V
∗
C363
ON : 3.1V
OFF : -6.2V +
+15.4V
+B
+47.2V
48.3V
B
+12V
28.7V
+15.4V
12.2V
D27 2
∗ 1
Q303 R303
∗
C307 1/4W
R309 R306
∗
100 -56.0V 100 1/4W C322
∗
16.0V R318
Q304
R305
16.0V
-30.5V
R308 220
2.7K
Q307
47.7V
0V
Q302
Q304
-0.6V
Q303
-30V AVR
+15V AVR
-48.8V
CN7
HI-TAP
ON : -61.3V Q306
OFF : -55.3V
B
AI AJ
R100 33 1/4W
L2 512nH
R331
1.8K 2W
Q309
R335
RLY
47K
DRIVER
(FL/FR)
L1
13
512nH
R99
33 1/4W
R199
33 1/4W
L5
512nH
R332
40
1.8K 2W
Q310
R337
47K
RLY
DRIVER
(C/SW)
14
∗
L6
512nH
∗
R200
33 1/4W
R150
33 1/4W
L4
512nH
R333
1.8K 2W
Q311
R339
47K
RLY
DRIVER
(SL/SR)
11
L3
512nH
R149
33 1/4W
C362
Q312
22u50
+
∗
R414
R341
47K
SP.B
C361
RLY
22u50
DRIVER
∗ +
R413
12
+12V +12V
12.2V 12.2V
+B
+B R301
HI-TAP
ON : 61.3V 1.8K 2W
OFF : 55.3V
K1
R321
1 1/4W
+B
D11
∗
Q305
D24
R327
∗
1
330
D23 B
+B
D12
∗
R319
Q313 R323
Q301 2.2
4.7K
Q308
C303
ON : 4.5V
R328 OFF : 0V
0.01
100
HI-TAP
ON : -61.3V
OFF : -55.3V
R322
B B
∗
1 1/4W
R317
Q305-308,313
TAP RLY
C321 10P
LIMITER
CONT.
B
VR-7060/7070/7080/KRF-V7070D/V7070D-S (2/4)
KRF-V8070D/V8070D-S/X9070D/X9070D-S (2/4)
AK AL
J5
Lch
∗
K2
SPEAKERS
FRONT A
Rch
Cch CENTER
∗ X25-B/2-
CN304
WH4
2 SL GND
3/4 AR-1
∗
1 SW GND
K3
∗
WH1 X25-B/2-
CN302
4 SL ch
3 SW ch
AS-1
3/4
2 SR ch
1 GND
∗
J6
Lch
∗
K4
SPEAKERS
FRONT B
Rch
∗
J7
Lch
∗
K5
SURROUND
Rch
Lch
SPEAKERS
FRONT B
Rch
CAUTION: For continued safety, replace safety critical compo-
nents only with manufacturer's recommended parts (refer to parts
CN2
X14-D/11- list). indicates safety critical components. For continued protec-
WH42
1 GND
tion against risk of fire, replace only with same type and rating
2 +12V
4/4
BD-6
fuse(s). To reduce the risk of electric shock, leakage-current or
3 GND
4 -12V
resistance measurements shall be carried out (exposed parts are
acceptably insulated from the supply circuit) before the appliance
is returned to the customer.
WH3 X14-F/11-
CN2
+B 3 V.REG.
BD-5
2 GND 4/4
The DC voltage is an actual reading measured with a high imped-
C453
1000P
ance type voltmeter with no signal input. The measurement value
1 UNREG.
may vary depending on the measuring instruments used or on the
CN1
product.
5 VH
to MAIN
4 VL
TRANSFORMER
3 GND
4/4 BU-4
BV-4
2 VL
1 VH
KRF-V7070D/V8070D/X9070D/VR-7060/7070/7080
Y05-4700-10
AM AN