Sony BVW-55 Maintenance Manual page 648

IC91 Q91-98
CN21
H:LNG CH1 ON(LCH)
APR-42,31-59 51 LNG CH1(LCH)
H:LNG CH2 ON(LCH)
APR-42,31-61 52 LNG CH2(LCH)
H:AFM CH1 ON(LCH)
APR-42,31-63 53 AFM CH1(LCH)
H:AFM CH2 ON(LCH)
APR-42,31-65 54 AFM CH2(LCH)
H:LNG CH1 ON(RCH) BUF INV
APR-42,31-67 55 LNG CH1(RCH)
H:LNG CH2 ON(RCH)
APR-42,31-68 56 LNG CH2(RCH)
H:AFM CH1 ON(RCH)
APR-42,31-69 57 AFM CH1(RCH)
H:AFM CH2 ON(RCH)
APR-42,31-70 58 AFM CH2(RCH)
IC70
CN21 H:REC CONT IN
APR-42,31-73 79 L:METAL/H:OXIDE
IC70
APR-42,31-74 80 H:AFM MUTE IN
IC71 L:VIDEO REC/EE
CN21
H:VIDEO REC/EE(MOD)IN
APR-42,31-71 77
L:REC CONT
APR-42,31-72 78
AFM POWER SAVE1 BUF
APR-42,31-87 97 AFM POWER SAVE1
AFM POWER SAVE2
APR-42,31-88 98 AFM POWER SAVE2
Q21
FL21 Q22,23 Q24
CN22
AFM PB A RF
RP-107,401-14 37 LPF AGC MUTE
RV21 IC601
AFM C-A
RF LEVEL
RF MUTE
L:VIDEO REC/EE
IC120,121
CN21
C SW PULSE
SV-206,303-13 99 LATCH
Q41
FL41
Q42,43 Q44
CN22
AFM PB B RF
RP-107,401-16 39 LPF AGC MUTE
RV41
AFM C-B
RF LEVEL
APR-42,31-95 CN21 IC71 Q61,62
CH1 H:EE/L:PB
AU-262,11-77 49
LEVEL
APR-42,31-96 CN21 SHIFT
CH2 H:EE/L:PB
AU-262,11-78 50 BUF
MON L:FIX/H:VAR
APR-42,31-77 83 Q63,64
MON L:AFM/H:LNG
APR-42,31-78 84
LEVEL
SHIFT
Q81,82
LEVEL
SHIFT
Q83,84
LEVEL
SHIFT
AFM-16 (1/2)
Block diagram
10
FL602
Q71,72 11
310K
BPF
LEVEL
AFM EE/PB(FET)
SHIFT
12
H:VIDEO REC/EE
L:REC CONT IN
IC602 10
AGC AMP
FL603
20
RF 6 11
540K
VAR
Q601
BPF
FL601
IC125,Q602-604
10 12
540K PB
DET 12
BPF DET
2
RF L:VIDEO REC/EE
5
18
IC120
IC122-124
PULSE
GEN
IC702 18 10
AGC HEAD AMP
FL702
2
RF 6 11
310K
VAR
BPF
5
IC704
12
VAR 8 10
ENVE
AMP
IC704,707
20 13
DO
RF DO
AMP
CH1 EE/PB(FET)
10
CH2 EE/PB(FET)
FL703
11
540K
BPF
MON FIX/VAR(FET)
12
RF MUTE
MON AFM/LNG(FET)
3-6
AFM-16 (1/2)
Block diagram
Q672
LPF
IC608 Q673
DEMODULATOR
LPF
DO
DET
5
PC HOLD
RV601
CH3 CARRIER
FREQ.
17
VCO
IC662
IC709
MOD/DEMOD DEMOD
BALANCE
DO
DET
5
PC HOLD RV662
RV703 CH3
CH4 CARRIER DEMOD BALANCE
FREQ.
17
VCO
Q705
1
PB
CONT
RV702
16 CH4 DEVIATION
IC762
IC609
DEMOD
MOD/DEMOD
BALANCE
DO
DET
RV762
5
CH4
PC HOLD
DEMOD BALANCE
RV603
CH3 CARRIER
FREQ.
17
VCO
Q605
1
PB
CONT
RV602
CH3 DEVIATION
16
IC708
L:REC CONT IN
DEMODULATOR
DO
DET
5
PC HOLD
RV701
CH4 CARRIER
FREQ.
17
VCO
3-6
Q676 Q676 Q675
MIX MUTE AMP
IC125
IC705
H:VIDEO REC/EE
IC125
RF MUTE
L:REC CONT IN
Q701
L:META/H:OXIDE
H:AFM MUTE IN
IC701 IC763
AMP
IC663
AMP
D700 IC600
NOISE REDUCTION
IC662 IC663 Q662,663 FL762
3 9
MUTE AMP SEL LPF MOA VCA
RV663 DET
CH3
NR LEVEL
RV801
IC131,132
AFM CH1
Q131
PB LEVEL
5
MOD/
STD
24
RV131
LIMITER
LEVEL
DET
IC762 IC763 Q762,763 FL762
26 20
MUTE AMP SEL LPF MOA VCA
RV763
RV803
CH4
AFM CH2
NR LEVEL
PB LEVEL
CN22
AFM REC RF
45 RP-107,401-38
CN22
CH2 AFM REC SIG
6 APR-42,32-5
CN22
CH1 AFM REC SIG
2 APR-42,32-1
RV802
AFM CH1
EE LEVEL
CH3 EE SIG
CH1 AFM PB
RV804
AFM CH2
EE LEVEL
CH4 EE SIG
CH2 AFM PB
AFM REC/PB, PB AUDIO LEVEL CONTROL
AFM-16 (1/2)
LOT NO. 812-
BVW-55