Kenwood VR 3080 - Dolby Digital Receiver Service Manual page 21

AO AP
(X08-297X-XX) (A/10)
+17V
Q460 Q452 Q454
-6dB -3dB
20db SEL REC
ATT ATT + +
DRIVE MUTE
DRIVE DRIVE
DRIVE
3.0V
16.0V
16.0V 16.0V
Q461 -16.5V 14.6V 16.0V
Q459 Q451 Q453
R468
3.3K
+
17V
+17V
17V
C151
10u50
+
-16.6V
C161
2.2u50
+
R155
ELECTRIC
220K
VOL.
-16.5V
IC16
R173
10K
Lch
Rch
R174
10K
R160
10K -16.5V
R156
R161
220K
10K
C162
C159 2.2u50
R152
100P
100K +
16.9V
FRch C152
10u50
+
C251
10u50
+
-16.6V
C261
2.2u50
+
R255 ELECTRIC
220K
VOL.
IC26 -16.5V
R273
10K
Lch
Rch
R274
10K
-16.5V
R256
220K
C262
16.9V 2.2u50
+
16.9V
RSch C252
10u50
+
+17V
C351
10u50
+
-16.6V
C361
2.2u50
+
R355
ELECTRIC
220K
VOL.
-16.5V
IC36
R373
10K
Lch
Rch
R374
C342 10K
100P -16.5V
R356
C341
220K
100P
C362
2.2u50
16.9V
+
16.9V
SWch C352
10u50
+
AQ AR
16.1V
Q456 Q458
SURROUND SW
+ +
MUTE
MUTE
DRIVE
DRIVE
14.6V 16.0V
14.6V 16.0V
Q455 Q457
R175
100
17V
Q151,152 -16.6V
20db SEL.
4
C175
3 R183
1 22u50 470
C171 22u35 2
+
IC17 0.7V
+
(1/2)
R187
R167 10K
2.2K
C165 100P
Q153
Q151
Q152 0.7V
C166 100P R188
2.2K
R168 10K
R176
Q154
100
IC17
C172
(2/2)
22u35 6 C176 R184
7 22u50 470
+
5
+
8
16.9V
+17V
17V
R275
-16.6V
100
4
3 C275 R283
1 22u50 470
C271 22u35
2
+
+ IC27 0.7V
(1/2)
R287
R267 10K
2.2K
C265 100P
Q253
Q251
0.7V
Q252
C266 100P R288
2.2K
R268 10K
R276
Q254
IC27 100
C272 (2/2)
22u35 6 C276 R284
7 22u50 470
+
5
+
8
Q251,252
20db SEL.
16.9V
+17V
17V
R375
-16.6V
100
4
3 C375 R383
1 22u50 470
C371 22u35
2
+
+ IC37 0.7V
(1/2)
R387
R367 10K
2.2K
C365 100P
Q353
Q351
0.7V
Q352
C366 100P R388
2.2K
R368 10K
Q354
IC37
C372
(2/2)
22u35 C376 R384
6
22u50 470
7
+
5
+
8
Q351,352
20db SEL.
16.9V
+17V
AS AT
X09-A/5
-CN6
3/4
B
VR-3080 (X08-2970-10)
DESTINATION
COUNTRY
U.S.A.
CANADA
KRF-V7772D (X08-297X-XX)
DESTINATION
COUNTRY
PX
X09-A/5
CN4
GENERAL MARKET
-CN8
AUSTRALIA
1 LS
JAPAN
3/4
2 L
3 A GND
4 C C
5 R
6 RS IC1,11-13,17,21,27,
31,32,37,41 : NJM4565MD
7 N.C.
C190 IC3 : CS4226KQG
39P
IC5 : TA7805SB
IC6 : TC74HCU04AF
IC7 : TC74HC123AF
IC15 : TC9162AF
IC16,26,36 : TC9412AF
IC42 : TC9184AP
IC51 : YSS912
Q153-156
IC52 : W241024AJ-15 or
MUTE
CY7C1009-15VC
J2
IC54 : L88M33T
R185
470 IC55,56 : TC7WU04FU
1 L
IC57 : TC7S00F
0.7V
IC61 : BA7626F
R189
IC62 : TA78057SB
2.2K
IC71 : UPD784214GF527
IC72 : UPD17215GT-737
Q155
IC81 : S-80740AL-A4
FRONT
0.7V
R190
2.2K
Q156 MAIN VOL.
(X08- ) (F/10)
R186
470
2 R
E53
WH53 R580
4.7 1/4W
5
IRVDD
+
Q253-256 4
u-COMGND
MUTE 3
ENCB
2
R285 ENCA
470
1
3 L TX REM
0.7V
R289
H
2.2K
Q255
SURROUND
0.7V
R290
2.2K
Q256
PRE
OUT Q571,572 : 2SC3940A(R,S) or
R286
470 2SD863(E,F)
4 R
D571-574 : B30-2532-05
X08-J/10
CAUTION: For continued safety, replace safety critical components only with manufac-
Q353-356 -CN62
MUTE turer's recommended parts (refer to parts list).
4/4
R385 For continued protection against risk of fire, replace only with same type and rating
470
5 CENTER
fuse(s). To reduce the risk of electric shock, leakage-current or resistance measure-
D
0.7V
ments shall be carried out (exposed parts are acceptably insulated from the supply cir-
R389
2.2K X09-A/5
cuit) before the appliance is returned to the customer.
-E2
Q355
3/4
0.7V The DC voltage is an actual reading measured with a high impedance type voltmeter
E
R390
with no signal input. The measurement value may vary depending on the measuring
2.2K
X08-D/10 instruments used or on the product.
-CN92
Q356
R386
4/4
470
SUB
6
WOOFER
DOLBY and the double-D symbol are trademarks of Dolby Laboratories Licensing Cor-
F
poration. Noise reduction circuit made under license from Dolby Laboratories Licensing
X09-A/5
Corporation.
-CN1
3/4
VR-3080 (2/4)
G
KRF-V7772D (2/4)
AU AV
R701,703,705, R702,704,
UNIT No. A C190 J1 J2 J61,62
ABB. 755,773 706,772
K
0-10 YES NO YES NO E63-1028-05 E63-1084-05 E63-0162-05
P
UNIT No. A R701 R702 R703 R704 R705 R706 R755 R772 R773 C190 J1
ABB.
2-91
Y YES NO YES
YES NO YES
0-21 NO YES NO
M E63-1028-05
YES NO
0-71 NO YES NO
X NO YES
NO
YES
J 0-01 YES NO YES NO E63-1069-05
Q1-4,151-156,251-256,351-356,623
: 2SC4213(B)
Q11,631 : UN5112 or DTA124EUA
Q451,453,455,457,459,461
: UN5216 or DTC143TUA
Q452,454,456,458,460,462
: UN5119 or DTA113ZUA
Q501,852,854 : UN5212 or DTC124EUA
Q611,612,621,622,801,851,853,856
: 2SC4081(R,S) or 2SC4116(Y,GR)
Q855,857 : 2SA1576A(R,S) or 2SA1586(Y,GR)
D1,2,41,101,860,861 : DA204U or 1SS302 or MA143A
D61,501,502,611,701-707,
803,851,852,855,856 : MA111
D452,453,708,801,802,804
: U1BC44
D853,857 : DAN202U or 1SS301 or MA142WK
D854,858 : DAP202U or 1SS300 or MA142WA
A1,2 : W02-1181-05
SIGNAL LINE
Q571,572 GND LINE
B LINE
+B
IR REMOTE
TRANSMIT B B LINE
+B
+
IR LED
(X08- ) (G/10)
0V
12.8V
R572
12.8V
430 0V
VOLUME
R577
Q571 Q572
430 S97
0V
0V
E54 E55
WH54
3 3
2 2
1 1
indicates safety critical components.
KRF-V7772D/VR-3080
Y05-3850-10
AW AX
2SA1123 2SC2878
2SA1534A 2SC3940A
2SA992 2SD863
2SC1845
2SC2003
2SC2631
DTC124ESA
J2 J61,62
2SA1048
E63-1084-05 E63-0162-05
2SC2458
E63-1085-05 E63-0139-05
DTC143TUA
UN5119
UN5216
2SA1586
2SC4116
UN4212
UN4219
2SA1309A
2SC3311A
2SC4081 NJM4565D-D
2SD1757K
TC9184AP NJM4580L-D
NJM4565MD
TA7805SB