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Durabrand DBVT1341 Service Manual Page 13

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ABC D E F GH
ABC D E F GH
2
1
3
4
5
6
7
8
2
1
3
4
5
6
7
8
D4003
1SS133
OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE
NOTE:THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME
X4001
100CT3R502
C4027
336.3V KA
C4025_1
2206.3V KA
C4012
226.3V KA
C4031
3.350V KA
C4042
100
6.3V
KA
C4034
4.725V KA
C4035
150V KA
C4045
2206.3V KA
C4004
2206.3V KA
C4009
4716V KA
C4023
226.3V KA
C4075
150P CH
C4029
0.01 F
C4074
0.01 F
C4024_1
18P CH
C4014_1
0.047 B
C4002
0.022100V MKT
C4033
820PB
C4054
0.1 F
C4059
0.1 F
C4061
0.01 F
C4032
0.0033 B
C4041
0.1 F
C4043
0.1 F
C4020
0.1 F
C4038
180P CH
C4069
0.1 F
C4037
0.1 F
C4044
0.1 F
C4036
390PB
C4005
0.01 F
C4060
0.01 F
C4066
0.022 B
C4028
0.1 F
C4006
0.015 B
C4021
0.1 F
C4015
0.047 F
C4019
0.047 F
C4016
0.068 B
C4064
0.022 B
C4055
1F
C4050
0.22 B
C4057
1F
C4076
0.1 F
R4068
2.2M
R4020
150
R4019
330K
R4001
560
R4021
22K
R4023
33K
R4022
470
R4038
680K
R4045
12K
R4006
47K 1/4W
R4007
39K 1/4W
R4035
100K
R4002
10K
R4003
10K
R4047
12K
R4025
1.5K
R1025
100
R4048
68 1/4W
R4004
15 1/4W
R4052
8.2K
R4054
18K
R4056
4.7M
R4058
2.7K
R4051
2.7K
R4059
10M
R4061
10M
R4012
820
R4064
6.8K
R4010
3.3K
R4044
100K
R4043
3.3K
R4041
1.8K
R4042
820
R4034
82K
R4060 1.5M
R4028
47K 1/4W
R4026
39K
R4015
2.2
R4033
2.2K
R4062
3.3M
R4032
100 1/4W
R4029
47K 1/4W
R4057
6.8K
R4055
1K
R4018
8.2K
R4017
6.8K
R4011
22K
R4053
6.8K
R4039
8.2K
R4024
5.6K
R4037
390
R4014
470K 1/4W
R4016
2.2M 1/4W
C4067
150V KA
C4046
3.350V KA
C4030
1016V KA
C4058
476.3V KA
C4063
476.3V KA
C4053
4.750V KA
C4062
150V KA
C4065
150V KA
C4047
1016V KA
C4052
4.750V KA
C4049
1016V KA
C4051
336.3V KA
C4048
1016V KA
C4010
476.3V KA
Q4001
KTC3198
AUDIO
PB SW
Q4002
KTC3198
AUDIO
PB SW
Q4006
KTC3203_Y
BIAS OSC
Q4007
2SC2412K
SYNC IN
Q4011
2SC2412K
BUFFER
Q4012
2SC2412K
BUFFER
W897
W880
W888
W818
W858
TP4001
V.ENV
W887
W873
Q4010
2SA1037AK
BUFFER
Q4009
2SA1037AK
BUFFER
Q4005
KTA1266
BIAS CTL
L4001
22uH
0305
L4009
100uH
0305
L4006
47uH
0305
L4003
100uH
0305
L4005
47uH
0305
TUNER VIDEO SIGNAL
RECORD COLOR SIGNAL
RECORD COLOR SIGNAL
CP4003
TMC-T02X-E1
1
2
Q4003
KRA103SRTK
SW
CP4002
IMSA-9604S-06Z14
1
2
3
4
5
6
CP4001_1
TOC-C04X-B1
1
2
3
4
DURING PLAYBACK
MEASURED WITH THE DIGITAL TESTER
NOTE:
THE DC VOLTAGE AT EACH PART WAS
CAUTION: DIGITAL TRANSISTOR
PLAYBACK LUMINANCE SIGNAL
PLAYBACK VIDEO SIGNAL
AUDIO SIGNAL(REC)
AUDIO SIGNAL(PB)
RECORD LUMINANCE SIGNAL
T4001
1626009
COIL,BIAS OSC
1
2
34
5
6
IC4001
LA71201M-N-MPB
Y/C/A/CCD/H.AMP IC
1 10111213141516
17 18 192 20
21 22 23 24 25 26 27 28 29
3
30 31 32 33 34 35 36 37 38 39
4
40
414243444546474849
5
50515253545556575859
6
60
616263646566676869
7
70717273747576777879
8
80
9
H.SW
Y/C_CS
ENV_DET
Y/C_CLK
H.AMP_SW1
Y/C_DATA
P.CON+5V
P.CON+5V
VCR_A_MUTE
P.CON+5V
GND
FRONT_AUDIO
FRONT_VIDEO
Y/C_AUDIO
Y/C_VIDEO
Y/C_CLK
Y/C_DATA
Y/C_CS
V.REC_ST_H
VCR_A_MUTE
DUMMY_V.SYNC
CTL-
CTL+
H.AMP_SW1
ENV_DET
H.SW
SD_VIDEO
SD_SYNC
PLAY_LED
P.CON+5V
TU_VIDEO
FRONT_VIDEO
P.CON+5V
Y/C_VIDEO
TU_AUDIO
SD_VIDEO
P.CON+5V DUMMY_V.SYNC
FRONT_AUDIO P.CON+5V
TU_VIDEO
TU_AUDIO
SD_VIDEO
Y/C_AUDIO
VD
P.CON+5V SD_SYNC
V.REC_ST_H
CTL+
CTL-
GND
HOT
Y/C_AUDIO
VCR_A_MUTE
PLAY_LED
P.CON+5V
VD
TO FULL ERASE HEAD
NC
NC
NC
G-2G-1
Y/C/AUDIO/CCD/HEAD AMP SCHEMATIC DIAGRAM
(SYSCON PCB)
VMA227
PCB010
FROM/TO HEAD AUDIO CONTROL
FROM/TO MICRO MOTOR
FROM TV POWER
FROM/TO CHROMA/IF
FROM/TO MICON
FROM/TO IN/OUT
AUDIO PB
AUDIO REC
FE HEAD(GND)
FE HEAD(HOT)
SP-CH2 (L)
SP-CH1 (R)
CTL+
CTL-
AE HEAD(-)
AE HEAD(+)
SP COM
NC
NC
0
0
0.7
0.7
0
0
5
5.3
0
5.2
0
0
0
NC
NC
+
Vref
2.3V
SP,LP
EQ
AMP
ALC
ALC
A-VCC
1
2
3
A-GND
HA
PRE GND
R
P
P
R
P
P
H
L
H
L
REC:LP<EP
PB:EP
DET
PB,EE
PB,EE
VREF
REC
AMP
MUTE
AUTO
BIAS
LINE
AMP
REC
FM-EQ
FM
AGC
VHS
SOPB
P
R
PB
FM EQ
P
R
S-EQ
MAIN
DE-EM
LIM
DOUBBLE
FM
DEM
SUB
LPF
B
S
DET
EMPHA
FIL
MAIN
4.7K
Y-VCC
V.SYNC
SEP
SEP
6DB
QV/QH
AGC
TC2
BAL
TC1
REG
4V
1
2
3
VDD 4Fsc
CLOCK
PLL
TIMMING OUT
DRIVER
AUTO-BIAS
CLAMP
CCD
VSS
OUT
IN
VCA
VCA
CLAMP
VCP
ALWAYS
5V
B
VX01
320FH
VCO
SLD
PHASE
EQ
fo-ADJ
PHASE
EQ
Q-ADJ
FM
AGC
FIL
Y-GND
R
P
FBC
1/2
VIDEO
AGC
Y/C
MIX
NC1
N.L.
DEEM
Y-LPF
CLAMP
DETAIL
ENH
NL
EMPHA
NL
EMPHA
FM
MOD
NORMAL
R-EQ
TEST
YNR/COMB
3.58M
BPF1
B.D
P
PB
AMP
CNC
BGA
BGA
BGA
R
P
AFTER
BEFORE
3.58M
BPF2
B-UP
AMP
Main
CONV
ACC
AMP
DET
ACC
C-LPF
4.21M
BPF
Sub
CONV
R
R
P
PP
LPF
RP
REC
AFC
PB
APC
REC
APC
P
R
R
P
R
P
C-VCC
SERAIL
DECODER
C-GND
C-ROT
RF-SW
IN
AUDIO
MUTE
HA SW
ENV
DET
ACC
DET
HA VCC
COMP
OUT
KILL
DET
DET
CHROMA
GND
HA
R
R
P
P
R
PB-C
PB-C
R
R
P
P
VSS
SYNC
1
2.8
0
0.7
4
NC
5.2
5.20
4.9
0
0.6
0
5.0
5.0
0 2.3
1.7
5.0
2.2 2.2 2.3 2.2 2.2 2.5 2.3 2.2 2.3 2.4 5.0 1.0 1.0 1.7 1.4 0
0 1.5
0.1 2.2
2.203.33.34.02.61.92.8
2.2
0
4.0
1.8
0.7
0.7
0.7
1.7
1.8
2.0
2.0
2.0
0
2.2
2.0
0
0.85.05.02.35.04.84.84.8000
0
4.9
5.0
0.5
1.7
0
3.0
2.8
3.1
3.1
2.6
2.0
4.0
NC
2.0
2.3
2.3
1.6
2.9
3.6
0
4.9
2.8
1.8
2.3
0
3.4
4.0
2
3
NC
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