Sony BVW-55 Maintenance Manual page 766

1
B8
4P
AD1
1P,3P L-METAL/H-OXIDE
2
1P Y_REC_CLAMP_PULSE
3
1P MOD_Y
4
FM CARRIER ALLOCATION
METAL OXIDE
Y SYNC TIP 5.7MHz 4.4MHz
Y PEDESTAL 6.27MHz 5.0MHz
Y WHITE PEAK 7.7MHz 6.4MHz
REFERENCE SIGNAL IS 100% WHITE SIGNAL.
VIDEO CLIP POINTS
5
METAL OXIDE
Y WHITE CLIP 250% 250%
Y DARK CLIP 100% 65%
REFERENCE SIGNAL:
Y 100% IS SYNC TIP TO WHITE PEAK
OF 100% WHITE SIGNAL.
CLIP POINTS ARE:
Y WHITE IS WHITE PEAK TO CLIP POINT.
Y DARK IS SYNC TIP TO CLIP POINT.
A B
R301
10k
R304 33k
AD11
AD12
C356 C357
0.1uF 33uF
16V
C303 R313
0.1uF 27k
+5V-2
L304
10uH
C319 C320 R351
C325
0.1uF 33uF 4.7k
0.1uF
16V
NM
Q308
2SC4177-T1L5L6
R356 1k
R358 L306
Q310
510 10uH R355
3
1.3k
2SA1611T1-M5M6
C330 C329
2
15pF 47pF
R359 C327
0 0.1uF
NM NM
C332
R362 R352 0.1uF
10k 1k
C333 C334
0.1uF 33uF
16V
L307
10uH
-5V-2
C358 C345
33uF 0.1uF
16V
R396
10k
C351
0.1uF
C
MD-122 (2/4) MD-122 (2/4)
R302
15k
R309
27k
C304 R315
0.1uF 10k
R334
27k
R335
10k
IC310
H8D7144F
FB1
18
VCC1
C355 C20
33uF 0.1
16V
C3
3300P
30 3
Q309
RV309;Y HIC LVL
2SA1611T1-M5M6
IC1
C324 Y HIC IN CXA1179N
0.1uF
TP306
RV309
R353 C326
5k
2.2k 220uF CL306
1
4V 2 R1 R3
2200 6800
3 1 1
7 IN1
R360
+
0 R2
6
C328 6800
2
220uF C1
8 IN2
IC303 4V R321 NO M'T
-
0
4 CLC505AJE-T
NM
TP308
C331
R361 0.1uF R20
39k NM CL308 100
5
TEST
E302
7
GND1
TP309
Y SRL IN
CL309
C339 R372
4pF 1.5k
R377
1.5k
R378
15k
C348 C346 R387
0.1uF 0.1uF 1k
R386
1k
8
SHIN
9
SHC
R395 R397 R392
10 -
27k 18k 22k
SHOUT VCA
11 +
SHPLS
R402
R405 C350
8.2k
27k 0.1uF
R400 R406
22k 3k
R410 C352
22k 0.1uF
4-72 (b) 4-72 (b)
D E
Q303
2SC4213B-TE85L
Q301
2SC4213B-TE85L
RV306 ;Y DEV RV303 ;Y 2ND DISTORTION
R303 RV301
3.3k 5k
R318
220
R316 R317 RV303
R314 R310
51k 997 10k
68k
1/10W L301 RV306
3.3uH 2k
2 R323
R319 R320 R327
33k
TP303
1.8k 33 3 1 10k
C302 R326
180pF C306 C307 2.7k R333
CL303 8pF 8pF 1.5k
C305 C309 6pF C308
47pF 0.1uF
R337
R336
0
3.26k
RV301 ;Y CARRIER(O)
R338
56k
C21
R18 0.1
1K
C22
0.1
R9
R6
10K
22K :RN-C Q1
2SA1611 C23
R5 0.1
1M
C8
C4 0.1 R10
0.01 R7 C5 12K
22K 0.1
28 29 21 26 25 22 24 23 20 19 14 10 15 16
CLIP
FM AM
V/I
MOD MOD
1
LIM
2 4 5 27 8 11 12 13 7 6 9
R4
1K
C6 R12 C7
10 75K 68
6.3V :RN-C 4V
:TA-C :TA-C
C2
NO M'T
R21 R22
2700 3300
R24
R23 R26 C10
2K
2200 2200 10
:RN-C
6.3V
:TA-C
R28
C9 C11
300
39P 10 RV2
:RN-C
6.3V 4700
R25 :TA-C
2K RV1
:RN-C 4700 R27
2200
Q2 Q3 Q4 Q5
2SA1611 2SC4177L6 2SA1611 2SC4177L6
RV1;LIMITER INPUT LEVEL RV2;LIMITER OUTPUT LEVEL
TP310
Y NL IN
CL310
TP311
C342 C343
R388 C349 33uF 0.1uF
1.5k 0.1uF 16V
CL311
IC305
CXA1480Q
- 31
+
CLIP
R407
3k
R409
220
C353 C354
27pF 0.1uF
F
Q304
2SC4213B-TE85L
C301
33uF
16V
RV302
2k
+5V-2
R411 S301(2/2)
1k
4 3
R311 R312
6.8k 6.8k 33k ON:TEST
Y CLIP
Q302 R412
47k
2SC4177-T1L5L6 TP301
R324 CL301
R325 R328 22
22 330
RV302 ;Y CARRIER(M)
Q305
DTC144EUA-T106
IC2
TA78L05F L310
C359
10uH +8V-2
9 0.1uF
VCC2
C310
10uF
25V
C24
0.1
17 11
OUT
12
GND2
R16
10K
18
Q6
DTC144EU
6
NLCNT
8
HF
C12
62P
*A1
*A2
BVW-55
G H