Toshiba VTW21FQR Manual de servicio - Página 17

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Toshiba VTW21FQR Manual de servicio
A
B

Y/C/AUDIO/HEAD AMP SCHEMATIC DIAGRAM

8
(VCR PCB)
FROM REGULATOR1
VD
GND
Y/C_AUDIO
7
L4608
1mH
P.CON+9V
P.CON+5V_A
FROM/TO CYL
6
CP4501
TOC-C09X-A1
HF1
9
HF1 (R)
HF_COM
CD4501
8
HF COM
HF2
2F061502
7
HF2 (L)
6
SP-CH1 (R)
5
SP COM
4
SP-CH2 (L)
3
EP/LP-CH1 (R)
2
EP/LP COM
1
EP/LP-CH2 (L)
5
TO FULL ERASE HEAD
CP4503
B2013H02-2P
GND
2
FE HEAD(GND)
HOT
1
FE HEAD(HOT)
P.CON+5V_A
FROM/TO HEAD AUDIO CONTROL
CD4005
CP4505
2F061502
IMSA-9604S-06C
1
AE HEAD(-)
20
2
AE HEAD(+)
CTL-
3
CTL-
CTL+
4
CTL+
4
5
AUDIO_PB
6
AUDIO_REC
3
2
NOTE:THE DC VOLTAGE EACH PART WAS
1
MEASURED WITH THE DIGITAL TESTER
DURING PLAYBACK.
A
B
H-9
C
AMP
Q4607
2SC2412K
R4655
6.3
1.4
470
2.0
R4653
R4654
560K
330K
R4601
1.5K
C4602
0.022 B
15.6KHZ TRAP
L4601
STP-01064
C4517
NC
C4513
0.1
B
0.01
F
C4554
C4514
NC
6.3V
220
YK
6.3V
47
KA
L4505
100uH 0305
L4506
100uH 0305
R4510
R4514
330K
8.2K
C4515
0.01 B
C4516
16V
22
KA
C4519
R4513
16V
22
BUFFER
47K
C4504
Q4618
2SC2412K
3.7
50V
4.7
R4620
VD
10M
R4629
1.5
1.0
1/4W
10M
C4512
R4504
220P CH
R4512
1
6
4.6
4.9
3.3
2.2K +-1%
NORMAL AUDIO
2
5
OSC
REC ST SW
V.REC ST SW
4.9
Q4502
3
4
Q4501
Q4505
KTC3203_Y
2SC2412K
DTA124EKA
R4506
COIL,BIAS OSC
4.7
R4501
L4503
0
4.8
4.8
10K
1626008
C4508
0
2.2K 1/4W
0
0.0047 B
NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME
OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE
C
D
E
22
H.SW
TP4501
NC
21
V.ENV
R4665
TP4502
NC
1K 1/4W
Y/C/AUDIO/CCD
/HEAD AMP IC
IC4501
NC
NC
HA118225F
R4536
2.9
0
0.1
3.0
2.3
2.8
0
0
0.2
2.6
2.8
2.5
2.5
0
2.0
2.5
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
1M
C4522
B-Y
4.6
CCD
TANK
Invert
X-Tal
CONT
VCO/OSC
50V
1
KA
4.2
MESECAM
CR DET
DET
1.4
REC
Killer
PB
REC
APC
APC
APC
Comp
4.9
ENV
HPF
DET
DET
APC SW
C4526
DET
L-SECAM
3.1
SW44
SP2
Mix Level
SW36
0.01
F
BE
C-ACC;ON
3.1
ADJ
Chroma
SW45
L-SECAM
ACC
SP2
C4527
SW42
SP1
3.1
SW39
CH2
SW35
L-SECAM
C-ACC;
0.01
F
REC TRAP ON
LPF
0
Through
SW46
SW37
REC
CH1
SP1
+
MUTE
C4528
VCA
L-SECAM
REC TRAP
3.0
OFF
SW47
R
SP2
CH2
SP
0.01
F
3.0
FH TRAP
SW40
CTL TRAP
SW48
SW41
P
C4529
SP
EXT
P SW34
SP2 SP1
CH1
3.0
ACC
SW43
2M LPF
SW38
REC TRAP
INT
R
0.01
F
HiFi TRAP
4.9
HPF
SQPB
SW49
DL
C4523
SP1
SQPB
0.4
SW8
AUDIO ALC
SQPB
EXT INT
P.EQ
SW12
P
50V
4.7
KA
2.6
LPF
TH
SW9
TRAP
SW4
R
G-EQ
2.6
REC
629K
FM
SP ON
DO
R P
Filter
TRAP
AGC
C4524_1
Det
DLIM
W835
2.5
SW5
PRE AMP
DET
FM MOD
DET
MEMO
SW3
REC
25V
10
KA
SW11
P
0
VCA
ON
f0/Dev ADJ
Sub LPF
R
SW2
SW6
SW10
MAIN
3.3
EP ON
ATT
REC
EMPH
REC FBC+ALC
(-4dB)
EQ
CARRIER
PB AGC +APL
0
OFFSET
SW7
W.C/DC
MAIN
ATT
2.6
DE EMPH
BAND
(-6dB)
P
R
SW1
GAP
SW13
KA
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
0.2
0
0 4.9 2.2 3.2 2.9 2.5 2.2 2.4 2.7 1.7
0 2.8 3.4 2.3 3.4 2.1 3.4
NC NC
KA
R4518
R4519
680
12K 1/4W
PB SW
0
Q4506
R4508
0.7
2SC2412K
4.7K
0
PB SW
Q4507
0
R4509
2SC2412K
0.7
4.7K
0
CAUTION: DIGITAL TRANSISTOR
D
E
F
G
BUFFER
Q4508
2SC2412K
1.6
4.9
2.2
R4533
10M 1/4W
NC
1.8
2.5
2.2
0
5.0
5.2
2.3
2.3
0
2.1
0
2.8
5.0
2.8
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
5.0
Clock Driver
Down
LCVCO
3.3
Conv
2fsc
Y-CCD
0.2
Mode
Discri
ACC
ACC
Chroma
Control
Det
SW
ACC Det
SW30
5.0
P
C-CCD
VCA
3.3
CLPF1
CLPF2
R
R P
SW29
3.3
C.K
+
CCD
P
R
LPF
4Phase
L-Det
0
SW33
P
NP Conv
C.K
SW27
R P
Main
Main
+
R
2.2
Conv1
Conv2
SW51
N.L
SQPB
L-SECAM
NC
P
R
R
P
De-Emph
EQ
SW31
2.2
SW26
EXT
Pilot
B.D
SW32
Erase
INT
NC
L-SECAM
2.6
6dB
4.43PAL
MPAL
SECAM
AMP
CHANGEDELAY
Y-LPF
C4576_2
Delay
SW19
2.4
P
BPF
SW17
L-SECAM
LPF
50V
10
MS7
C-Delay
SQPB
1.6
R
SW15
SW28
SQPB
P
C-Suquelck
2.6
R
N.L
SW20
DEH
YNR
Emph
C4572
R
P
3.4
S-Det
GCL
NP-NC
C4580_1
0.1
F
PC
GCL
TRAP-NC
2.6
DO
P
SW24
25V
10
3.3
R
VIDEO AGC
SW52
GCL
SW18
DO
R
1.8
/REC
ATP
SW16
FEED BACK
CLEAR SYNC
V-AMP
CLAMP
Suquelck
2.4
VIDEO ALC
R*SDECK
C4578
2.9
AGC
PG
SYNC
SW22
PG
ATT
Det
35Pin
Sep
ATT
ATT
0.1
F
(-10dB)
0
(-10dB)
(-10dB)
GCL
R*SDECK
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
0 3.3 5.0 2.6
0
2.3 3.3
0
5.0 3.5 2.9
NC
NC
C4562
L4509
0.1 F
22uH 0305
C4622
0.1 F
C4588
47P
CH
BUFFER
Q4606
2SA1037AK
3.1
2.5
0
W804
W864
AUDIO SIGNAL(REC)
AUDIO SIGNAL(PB)
TUNER VIDEO SIGNAL
F
G
H
8
FROM/TO SECAM CHROMA/Hi-Fi
HF1
HF2
HF_COM
NORMAL_A
Y/C_AUDIO
7
FROM CHROMA/IF
TU_VIDEO
DVD_VIDEO
REC_TU_V
FROM DEMODULATOR/21PIN
6
REAR_V_IN
FROM DVD IN/OUT
C4583
FRONT_V_IN
390P
CH
FROM/TO MICON
5
VCR_A_MUTE
H.SW
C4581
C.SYNC
0.01 B
SCL
SDA
C4579
D_V_SYNC
50V
3.3
KA
V.REC_ST_H
ENV_DET
CTL+
C4530
CTL-
KA
100P CH
MESECAM_H
4
C.SYNC
TO T'TEXT/RGB SW
Y/C_VIDEO
D_V_SYNC
P.CON+5V_A
3
P.CON+9V
23
Y/C_VIDEO
2
PCB010
DMD027
1
H
H-10