CRITICAL SAFETY COMPONENTS ARE IDENTIFIED BY THE SYMBOL .
REPLACE ONLY WITH PART NUMBERS SPECIFIED.
5-23
TVBR2000 SHEET 23
A
B
C
D
E
F
G
1
2
3
4
5
6
7
8
9
10
P/L = See parts list for part description PROV = Provisional
25" Head Amp Circuit
L4004
2623003
15.6KHz TRAP
1
2
3
4
6
L4007
100uH
Q4006
2SD734
BIAS OSC
Q4001
2SC3331
AUDIO
PB SW
Q4002
2SC3331
AUDIO
PB SW
Q4008
2SC2412K
SW
Q4010
2SC2412K
BUFFER
Q4009
2SA1037K
BUFFER
Q4007
2SA1037AK
BUFFER
Q4005
2SA1318
BIAS CTL
X4001
3.579545MHz
C4034
1
50V
uF
C4016
4.7
25V
uF
C4058
22
6.3V
uF
C4010
47
6.3V
uF
C4043
1
50V
uF
C4017
1
50V
uF
C4011
1
50V
uF
C4004
47
6.3V
uF
C4024
4.7
25V
uF
C4046
0.01
uF
C4051
0.01
uF
C4053
0.01 uF
C4032
0.022
uF
C4083
27pF
C4052
0.01 uF
C4009 0.1 uF
C4003
0.1
uF
C4028
0.1
uF
C4029
0.047
uF
C4072
0.1
uF
C4074
470pF
C4036
0.022
uF
C4044
0.1
uF
C4002
0.01
uF
C4048
0.01
uF
C4050
0.01
uF
C4055
0.022
uF
C4014
0.047
uF
C4054
0.01
uF
C4078
0.1 uF
C4066
1uF
C4073
1
uF
C4065
1
uF
C4085
0.1
uF
C4069
0.01
uF
C4077
0.1
uF
C4015
0.022
100V
uF
C4038
0.1
uF
C4049
180pF
C4047
22pF
C4006
0.015
uF
C4025
0.0022
uF
C4005
0.01
uF
C4041
390pF
C4018
0.0012
uF
C4020
0.01
uF
C4027
820pF
R4033
1K
R4057 2.2K
R4047
10K
R4011
22K
R4046
680
R4013
10K
R4008
10K
R4062
220K
R4012
18K
R4072
P/L
R4041
6.8K
R4050
680K
R4020
10K
R4001
560
R4007
330
R4009 P/L
R4063
3.3M
R4014
1.8K
R4006
P/L
R4052
56
1/4W
R4044
8.2K
R4078 100
R4055 8.2K
R4004
2.7K
R4005
1M
R4059
3.9K
R4029
2.2M
R4060
220K
R4076
1M
R4065
2.2K
R4053
1.5K
R4039
22K
R4036
47K
R4031
12K
1/4W
R4002
10K
R4003
10K
R4015
2.2
R4067
47K
R4068
47K
R4010
3.3K
R4027
270
R4048
4.7K
R4024
10K
R4049
1.2K
R4051
27K
R4023
15K
R4025
330K
R4022
6.8K
R4032
27K
R4034
820
R4066
4.7K
R4070
47K
1/4W
R4019
4.7K
R4026
47K
R4028 1.5K
R4054
2.7K
R4077
680K
C4039
1
50V
uF
C4007_1
1
50V
uF
C4026
100
6.3V
uF
C4023
22
6.3V
uF
C4021
33
6.3V
uF
C4045
47
6.3V
uF
C4057
47
16V
uF
C4037
1
50V
KA
C4062
1
50V uF
C4059
4.7
25V
uF
C4031
2.2
50V
uF
C4071
1
50V
uF
C4075
10
16V
uF
C4030
10
16V
KA
C4033
2.2
50V
uF
C4076
100
6.3V
uF
C4060
1
50V
uF
C4061
1
50V uF
C4008
100
6.3V
uF
C4022_1
4.7
50V
uF
C4070
47
6.3V
uF
C4035
100
6.3V
uF
W822
W896
W828
W821
W823
W836
W827
L4001
100uH 0305
L4009
100uH
L4010
100uH
0305
L4005
47uH
0305
L4002
100uH 0305
L4003
100uH
L4008
100uH 0305
D4004
MTZJ6.8B
D4006
1SS133
TP4001
JWF-50K-1
IC4001
LA71067M-MPB
Y/C/AUDIO/CCD/HEAD AMP IC
1
10
100
11 12 13 14 15 16 17 18 19
2
20 21 22 23 24 25 26 27 28 29
3
30
31
32
33
34
35
36
37
38
39
4
40
41
42
43
44
45
46
47
48
49
5
50
51
52
53
54
55
56
57
58
59
6
60
61
62
63
64
65
66
67
68
69
7
70
71
72
73
74
75
76
77
78
79
8
80
81
82
83
84
85
86
87
88
89
9
90
91
92
93
94
95
96
97
98
99
CP4001_1
TOC-C04X-B1
1
2
3
4
CP4003
TMC-T02X-E1
1
2
T4001
1626007
COIL,BIAS OSC
1
2
3
4
5
6
CP4002
52045-0645
1
2
3
4
5
6
Q4003
DTA124ES
SW
TU_AUDIO
P.CON+5V
SP/LP/EP-H
INPUT_SEL
FRONT_A_IN_L
GND
REAR_A_IN_R
P.CON+5V
FRONT_A_IN_L
FRONT_VIDEO_IN
REAR_A_IN_R
REAR_VIDEO_IN
SD_VIDEO
Y/C_AUDIO
GND
SP/LP/EP-H
TRICK_PB-H/EE-H
P.CON+5V
V.REC_ST_H
C_ROTARY
VCR_A_MUTE
TU_VIDEO
REC/EE/PB
DUMMY_V.SYNC
CTL-
FRONT_VIDEO_IN
CTL+
DOC_XO_CTL
ENV_DET
REAR_VIDEO_IN
INPUT_SEL
COMP
ENV_DET
COMP
CHROMA_VIDEO
H.SW
Y/C_AUDIO
SD_VIDEO
V.SYNC
C.SYNC
DUMMY_V.SYNC
P.CON+5V
P.CON+5V
SD_VIDEO
Y/C_AUDIO
CTL+
V.REC_ST_H
TU_AUDIO
CTL-
TU_VIDEO
CHROMA_VIDEO
V.SYNC
C.SYNC
TRICK_PB-H/EE-H
V.REC_ST_H
VCR_A_MUTE
DOC_XO_CTL
SP/LP/EP-H
REC/EE/PB
C_ROT
AR
Y
P.CON+5V
H.SW
4
4.2
2
NC
3
NC
5.2
0
2.5
2.4
5.1
0
0.3
2.8
4.6
0
1.0
0
1.8
1.8
1.8
1.8
5.1
0
1.8
1.8
1.8
1.8
0
2.4 2.4 2.4
0 2.4 5.0 2.3 2.3 2.8 2.3 1.5 2.0
0
0
4.0 2.3 2.2 3.0 4.1 3.4 4.9 3.4 5.0 5.0
5.0 4.2 2.3 0.1
0
2.2
0
2.7
2.5
3.0
3.2
2.8
4.9
2.8
3.5
2.5
1.5
1.0
3.0
4.4
0
4.6
4.8
1.0
2.1
0
2.8
3.4
2.0
0.2
1.0
5.0
1.6
0
4.9
0
0
0.8
0.8
0.8
0
0
5.0
NC
5.0
1.5
2.4
2.4
0
2.4
2.4
2.4
2.4
VIDEO OUT
AFC
DET
SYNC
AUTO-BIAS
VSS
VSS
R
P
TIMMING
ACC
AMP
PB
H.A
CH3
OUT
REC SP
OUT
REC EP
ALC-LEVEL
PB-Y
R
P
NC1
DEEN
N.L.
MIX
Y/C
PB-C
13 2
R
P
PR
AFTER
BEFORE
R
P
R
P
KIL
R
P
NOMAL
HA
TEST
P
R
R
P
R
P
TEST
R
P
R
NOMAL
VHS
SQPB
SW
SW
H.AMP
H.AMP
L
H
CH1
CH2
CH4
L
H
L
H
H.A GND
Y-Vcc
Y-GND
4Fsc
IN
OUT
C.SYNC
BGA
BGA
TEST
R-EQ
PHASE-EQ
PB
CLOCK
PULL
OUT
CCD
DRIVER
FM-EQ
S-EQ
AFC
REC
APC
PB
APC
REC
BPF1
3.58M
BPF2
3.58M
CONV
V/I
DEM
FM
SUB
LPF
ENH
DETAIL
EMPHA
NL
LIM
DOUBLE
Y-LPF
YNR/COMB
INS.
Chara
6DB
SEP
SYNC
1/2
FBC
TC2
AGC
V-AGC
CLAMP
VCP
CLAMP
VCA
CLAMP
VDD
C-VCC
5V
ALWAYS
SLD
VCO
320FH
VX01
C-LPF
BGA DET
ACC
AMP
B-UP
C-GND
REG
DET
KIL
KIL
KIL
B.D.
GCA
AMP
CONV
Main
BPF
4.21M
BALANCER
CONV
Sub
MOD
FM
REC
FM-EQ
DC
WC
FM
AGC
DELAY
FM-EQ
PB
+
AMP
AGC
IN
IN
AMP
CTL
R
HA
SW
C
ROT
RF
SW
MUTE
AUDIO
R/P
R/P
AUDIO
R/P
Y/C
FILT
REC AGC
COMP OUT
ENV DET
H.A VCC
H.A GND
AMP
LINE
BIAS
AUTO
MUTE
A.GND
P
A-Vcc
2.3V
Vref
ALC
/EE
PB
Vref
AMP
REC:
EP/LP
PB:EP
REC
PB/EE
AMP
EQ
5.2
NC
NC
NC
NC
NC
1
2.6
2.2
NC
1.4
2.8
2.0
2.6
TO FULL ERASE HEAD
FROM/TO HEAD AUDIO CONTROL
SP_COM
FROM/TO CYL
FROM POWER
FROM/TO CHROMA
FROM/TO MICRO
FROM/TO IN/OUT
FE HEAD(GND)
FE HEAD(HOT)
AUDIO PB
AE HEAD(+)
CTL-
CTL+
AUDIO REC
AE HEAD(-)
0
0
0.7
0.7
0
0
0
0
0
5.2
0
SP-CH1 (R)
SP-CH2 (L)
5.3
0
4.2
5.0
4.8
2.3
2.6
0
0
This schematic
applies to the
following model
only:
TVBR2542
TUNER VIDEO SIGNAL
PLAYBACK VIDEO SIGNAL
AUDIO SIGNAL(REC)
AUDIO SIGNAL(PB)
TO SHEET 27
TO SHEET 21
TO SHEET 22
TO SHEET 19
1 REC/PB
0.5V 20
µ
s/div
2 REC/PB
100mV 0.5
µ
s/div
3 PB
100mV 5ms/div
4 REC
20V 10
µ
s/div