Sony BVW-55 Maintenance Manual page 768

1
4P
1P,2P L-METAL/H-OXIDE
2
1P C_REC_CLAMP_PULSE
3
1P
4
FM CARRIER ALLOCATION
METAL OXIDE
C PEDESTAL 5.3MHz 4.5MHz
C HIGH PEAK 5.8MHz 5.0MHz
C LOW PEAK 4.8MHz 4.0MHz
REFERENCE SIGNAL IS 100% COLOR BARS SIGNAL.
VIDEO CLIP POINTS
METAL OXIDE
C HIGH CLIP 305% 305%
C LOW CLIP 250% 170%
REFERENCE SIGNAL:
C 100% IS HIGH PEAK TO LOW PEAK
OF 100% COLOR BARS SIGNAL.
5
CLIP POINT IS PEDESTAL LINE TO CLIP POINT.
A B
B9
AD2
C547 C548
0.1uF 33uF
16V
+5V-2
L503
10uH
C515 C516 R545
0.1uF 33uF 4.7k
16V
Q511
2SA1611T1-M5M6
MOD_C
C537
C536
33uF
L507 0.1uF
16V
10uH
-5V-2
C
MD-122 (3/4) MD-122 (3/4)
R512 R511
12k 15k
AD21 R501 27k
AD22
R502
39k
C503 R521 C504 R529
0.1uF 33k 0.1uF 10k
18
VCC1
C546
33uF
16V
Q509
2SC4177-T1L5L6
R555 C520
0 0.1uF
NM NM
R556
0
NM
CXA1179N
C HIC IN
C521
0.1uF TP506
RV509;C HIC LVL
R562 NM L504
510 10uH
RV509
C526
5k
220uF
4V CL506 2
C533 C529
3 1 1
15pF 47pF
IN1
C528
2
220uF
R550 IN2
4V
0
R566 R546
NM
10k 1k
TP508
5
CL508
TEST
E502
7
GND1
4-74 (b) 4-74 (b)
D E
RV506 ;C DEVIATION RV503 ;C 2ND DISTORTION
2SC4213B-TE85L
R503
3.3k
RV503
10k
R515 R513 R514
8.2k 997 220
1/10W
L501
RV506
3.3uH
R516 2k
TP503 10
2
3 1
C502
180pF C506 C507 R522 R530
CL503 8pF 8pF 3.3k 1.5k
R531 C505 C509 8pF
27k 47pF
R533 R534 C508
R532 3.26k 0 0.022uF
10k
R535
0
NM
IC510
H8D7144F
R18
1K
BF1
R9
C20 R6
10K
0.1 22K Q1
:RN-C
2SA1611
C3
R5
1M
3300P
C8
C4 0.1 R10
0.01 R7 C5 12K
22K 0.1
30 3 28 29 21 26 25 22 24 23 20 19
CLIP
FM AM
IC1
V/I
MOD MOD
1 2 4 5 27 8 11 12 13
R1 R3 R4
2200 6800 1K
C6 R12
10 75K
R2 6.3V :RN-C
6800 :TA-C
C1 C2
NO M'T NO M'T
R20 R21 R22
100 2700 3300
R24
R23 2K R26 C10
2200 2200 10
:RN-C
6.3V
:TA-C
R28
C9 C11
300
39P 10
:RN-C
6.3V
R25 :TA-C
2K RV1
:RN-C 4700
Q2 Q3 Q4
2SA1611 2SC4177L6 2SA1611
RV1;LIMITER INPUT LEVEL
F
Q502
Q501 2SC4213B-TE85L Q504
DTC144EUA-T106
C501
100uF
6.3V
RV501 RV502
5k 5k
C CLIP
R504 R505 R506
Q503
8.2k 6.8k 33k
TP501
2SC4177-T1L5L6
R517
33k
R520
22
CL501
R523 R524
22 330
RV501 ;C CARRIER(O)
RV502 ;C CARRIER(M)
C21
0.1
C22 IC2
+8V-2
0.1 TA78L05F
9
VCC2
C514
C23 C24 10uF
0.1 0.1 25V
14 10 15 16
17 11
OUT
12
GND2
LIM
R16
10K
7 6 9 18
Q6
DTC144EU
C7
6
68
NLCNT
4V
:TA-C
8
HF
RV2 C12
4700 62P
R27
2200
Q5
2SC4177L6
*A1
RV2;LIMITER OUTPUT LEVEL
*A2
BVW-55
G H