Kenwood KRF-V7771D Service Manual page 30

DG DH
(X25-6202-70) (A/7)
R999 R998
10K 10K
1/4W 1/4W
54.4V
14.2V
Q999
D997
14.6V
+17V
+31V
7.9V
IC84
12.7V
2 3
IN OUT
+8V +13V
+ GND +
+13V
1
10V AVR
9V AVR
21.8V
+B +B
Q83
R805 16.9V
+17V
1.8 1/4W
16.3V 23.6V
24.2V
24.2V
R823
4.7K
Q81
+20V
C805
17.5V
5.0V 330P 20V
+
Q83
+ + -25.2V
16V AVR
6 8 R801
7 3.3K
R808 5
1/4W +
D83
1K IC81
+
(1/2)
2.8V
5.0V
+ 0V
3 R802
D84
3.3K
2
1 1/4W
-3.2V
4
IC81
C806 -17.8V
(2/2)
R825
1000P
4.7K
Q82
-24.5V -25.2V
-16.5V -17.2V
R806 30.1V
17V
2.7 1/4W Q84
+31V +31V
+
DI DJ
B
+B +B
-54.4V
C452
+ R471
R480
2.2K
4.7u100 22 1/4W
Q454 1/4W
W254 D48 D49 R473 Q451
16.3V
390 B B C458 15.4V
-30.1V
1/4W 47u25 R478
0V -53.0V
-53.7V +
100
+ 15.4V
3.8V
0V
Q451,454,456
POWER LIMITER
0V Q456
Q453
R490 24K
C463 Q453,457
220u10
POWER LIMITER
+
+17V
+31V
E7
CN87 CN88 WH1
9
D88
F3
T1.6A L250V
8
7
6
1
5
D86
4
2
3
F1
T1.25A L250V
2
CN84 CN83
D81
1
CN86 CN85
F4
T1.25A L250V
B
+31V
CN82 CN81
D82
F2
T1.6A L250V
DK DL
B
+B
C451
4.7u
14.7V
Q455
100
R311 Q452
Q457
+ 2K
+
+ D46 D47 D7 R477
390 1/4W
9.6V
C461
0.6V
D44
1000P R467 1ST
Q311
C307
2.2K
9.0V
R481 100P
10K
0V 0V
D45
2ND
Q303
Q301 C313
56P
-51.3V
R313 C311
Cch
2.2K 2200P
R301 C301 R305 C309
Q305
1K 4.7u50 16K 220u10
+
D31
D32
C302 C310
R302 4.7u50 R306 220u10
Q306
+
1K 16K
R314 C312
SLch SLch
2.2K 2200P
-51.3V
C314
56P
Q302
Q304
0V 0V
2ND
9.0V C308
Q312
100P
9.6V 0.6V D34
1ST
52.0V
9.6V 0.6V
D37
C357
100P
Q361
0V
0V 2ND
Q353
C363
Q351
-51.3V 56P
R363 C361
SRch
2.2K 2200P
R351 C351 R355 C359
Q355
1K 4.7u50 16K 220u10
+
D35
D36
R352 C352 C360
1K 4.7u50 R356 220u10
+
16K Q356
R364 C362
Lch
2.2K 2200P
-51.3V
C364
56P
Q352
Q354
0V 0V 2ND
9.0V
C358
Q362
100P
9.6V 0.6V
D38
1ST
52.0V
9.6V 0.6V
D42
C404
100P
Q406
0V
0V 2ND
Q402
C407
Q401
-51.3V 56P
R407 C406
Rch
2.2K 2200P
R401 C401 R403 C405
Q403
1K 4.7u50 16K 220u10
+
D41
B
+31V
DM DN
CAUTION: For continued safety, replace safety critical com-
ponents only with manufacturer's recommended parts (refer
to parts list).
continued protection against risk of fire, replace only with
same type and rating fuse(s). To reduce the risk of electric
CN51 shock, leakage-current or resistance measurements shall be
B 1 -B
carried out (exposed parts are acceptably insulated from the
+B 2 +B
supply circuit) before the appliance is returned to the cus-
3 GND
tomer.
D33
R319 270 1/4W
The DC voltage is an actual reading measured with a high
52.5V R321
52.0V
270 1/4W
impedance type voltmeter with no signal input. The mea-
Q309
surement value may vary depending on the measuring
4 NFB
1.1V
5 BIAS(+) instruments used or on the product.
-1.1V
+
Cch
6 BIAS(-)
-0.8V
-51.8V
NJM4565L
Q307
R325 16K R327
1K
C319 27P
7 GND
B
C320 27P
2ND
R328
R326 16K 1K
8 NFB
Q308
SLch
-1.1V
-51.8V
9 BIAS(+)
TA78057S
-0.8V
10 BIAS(-)
1.1V
+
52.0V
Q310
52.5V
+B
62.6V
11 GND
12 NFB
Q359
1.1V
13 BIAS(+)
+
SRch
-1.1V
-0.8V
14 BIAS(-)
-51.8V
Q357
R375 16K R377
1K
C369 27P
IC1
IC21
IC23
-B IC81
C370 27P
15 GND IC82
R378
R376 16K 1K
IC83
16 NFB
IC84
Q358
-1.1V
Lch
-51.8V
Q81
17 BIAS(+)
Q82
-0.8V
18 BIAS(-)
Q83,85
Q84,86
19 GND Q301-304,351-354,401,402,
52.0V
+
Q360 Q305-308,355-358,403,404
1.1V
Q309,310,359,360,405
52.5V
Q311,312,361,362,406
Q451
Q452
+B
Q453,456
52.5V Q454
Q455,457
Q999
20 NFB
Q405
1.1V
21 BIAS(+)
+
-1.1V D7,44,45,58-60,74,75,
Rch
78,90,91,996,999
-0.8V 22 BIAS(-) D31-38,41,42,997
-51.8V D39,55,56
D43,77,85
D46
Q404
D47
D48
R413 16K R414
D49
1K
C410 27P
D73
D81,82
D83,84,998
B D86
D87,89
D88
23 R-GND
+31V 24 +31V
25 25 SE RELAY
26 NC
27 P-CON
28 28 FAN-H/L
29 29 FAN-ON/OFF
KRF-V7771D(E,T) (5/6)
KRF-V7771D/V7771DE
KRF-V7771DE(E2) (5/6)
Y05-3862-70
DO DP
indicates safety critical components. For
BA7645N CS4226KQG
LA1837 TDA7479D
X07-A/8
-CN10
6/6
R
NJM4580ED
: NJM2058D
:
TC9162AF
: NJM4558D
:
TA79005S or UPC7905AHF
:
TA7805S or UPC7805AHF
:
SI-3082V
: 2SC2458(Y,GR) or 2SC3311A(Q,R)
: 2SA1048(Y,GR) or 2SA1309A(Q,R)
: 2SB1370(E,F) or 2SB1375
: 2SD2061(E,F) or 2SD2012
: 2SA992(F,E)
: 2SC2631(R,S)
: 2SA1123(R,S)
: 2SA1586(Y,GR)
: 2SA1535(R,S)
: 2SC3944(R,S)
:
UN5212 or DTC124EUA
: 2SA1611(M5,M6)
: 2SC4177(L5,L6)
: 2SC3244
: MA111
: 1SS133 or HSS104
: DA204K
: RD5.1JS(B2) or HZS5.1S(B2)
: RD16ES(B2) or HZS16N(B2)
: RD18ES(B) or HZS18N(B)
: RD13ES(B2) or HZS13N(B2)
: RD11ES(B) or HZS11N(B)
: B30-2493-05
: 1B4B41
: RD15ES(B) or HZS15N(B)
: S5688B
: RD11JS(B) or HZS11N(B)
X25-E/7
: D3SBA20F03 -E6
6/6
S