DV-T5D
Daewoo DV-T5D, DVST5E32A-SN1, DV-T57, DV-T6A1, DV-T8W Service Manual
...
S
ervice
M
a
nu
a
l
S/M
No. : VTG 8E2AET0
Nov. 2003
DA
EWOO ELE CTRONICS
Corp
http : //svc.dwe.co.kr
V
ideo
C
assette
R
ecorde
r
T7-ME
CHA
M
odel
: D
VST8E32A-SN1
D
VST5E32A-SN1
1
TABLE OF CONTENTS
SAFETY&PRECAUTIONS.................................................................................................2
EXTERNAL VIEWS..........................................................................................................4
FRONT VIEWS FUNCTION.................................................................................................................... 4
REAR VIEWS FUNCTION...................................................................................................................... 8
REMOTE CONTROL............................................................................................................................8
ELECTRICAL ADJUSTMENT............................................................................................9
SPECIFICATIONS..........................................................................................................10
VOLTAGE CHART.........................................................................................................11
CIRCUIT DIAGRAM.......................................................................................................14
POWER SUPPLY SCHEMATIC DIAGRAM(VCR S/A)................................................................................ 14
SERVO & SYSCON SCHEMATIC DIAGRAM(VCR S/A)............................................................................ 15
VIDEO/AUDIO SCHEMATIC DIAGRAM (Hi-Fi)........................................................................................ 16
VIDEO/AUDIO SCHEMATIC DIAGRAM (Mono)..................................................................................... 17
TMI & MPX SCHEMATIC DIAGRAM(Hi-Fi)............................................................................................. 18
TMI & MPX SCHEMATIC DIAGRAM(Mono)........................................................................................... 19
WAVEFORMS ON VIDEO CIRCUIT................................................................................. 20
COMPONENTS LOCATION GUIDE ON PCB BOTTOM VIEW............................................. 22
PCB MAIN.......................................................................................................................................... 22
DISASSEMBLY .............................................................................................................. 26
PACKING ASS'Y ................................................................................................................................. 26
INSTRUMENT DISASSEMBLY ................................................................................................................. 27
ELECTRICAL PARTS LIST ................................................................................................ 32
APPENDIX (Appendix is provided only by internet http://svc.dwe.co.kr)
TROUBLE SHOOTING FLOW CHART............................................................................... 1
POWER CIRCUIT................................................................................................................................. 1
SERVO-SYSCON CIRCUIT.................................................................................................................... 2
CAM SW MODE TABLE....................................................................................................................... 7
AUDIO CIRCUIT ................................................................................................................................. 10
VIDEO CIRCUIT.................................................................................................................................. 18
µ-COM PORT.............................................................................................................. 22
TRAINING (Appendix is provided only by internet http://svc.dwe.co.kr)
2
SAFETY&PRECAUTIONS
SAFETY CHECK AFTER SERVING
Examine the area surrounding the repaired location for damage or deterioration. Observe that screw, parts and wires
have been returned to original positions. Afterwards, perform the following tests and conform the specified values in order
to verify compliance whit safety standards.
1. Insulation resistance test
Confirm the specified insulation resistance between power cord plug prong and externally exposed parts of the set
(RF terminals, antenna terminals, video and audio input and output terminals, microphone jacks, earphone jacks, etc.)
isgreater than values given in table 1 below.
2. Dielectric strengthen test
Confirm specified dielectric strengthen between power cord
plug prongs and exposed accessible parts of the set
(RF terminals, antenna terminals, video and audio input output
terminals, microphone jack, ear phone jacks, etc.)
is greater than values given table 1.
3. Clearance distance
When replacing primary circuit component, confirm specified clearance distance (d), (d
’
) between soldered terminals,
and between terminals and surrounding metallic parts. See table below.
Rating for selected areas
* : Class model only
AC Line Voltage Region
Insulation
Resistance
Dielectric
Strength
Clearance
Distance(d),(d)
100V Japan
>1MΩ
/500V DC 1kV AC 1min.
>
3
110 to 130V USA & Canada - 900V AC 1min.
>
3.2
* 110 to 130V
200 to 240V
Europe
Australia
Latin America
>10MΩ
/500V DC 4kV AC 1min.
>
6(d)
>
8(d')
(a :Power cord)
This table is unofficial and for reference only. Be sure to confirm the precise values for your
particular country and locality
NOTE
3
SAFETY&PRECAUTIONS
4. Leakage current test
Confirm specified or lower leakage current between B(earth
ground, power cord plug prongs) and externally exposed accessible parts (RF terminals, antenna terminals, video and audio input
output terminals, microphone jacks, earphone jacks, etc.)
Measuring method:(Power ON) Insert load Z between B(earth
ground, power cord plug prongs) and exposed accessible parts.
Use on AC voltmeter to measure across both terminals of load Z.
See figure2 and following table.
Leakage current ratings for selected are as
AC Line Voltage Region Load Z Leakage Current(i) Clearance Distance(d),(d’)
100V Japan
1k
Ω
i
<
1mArms Exposed accessible parts
110 to 130V USA &Canada
15kµF
1k
Ω
i
<
0.5mArms Exposed accessible parts
110 to 130V
200 to 240V
Europe
Australia
2k
Ω
i
<
0.7mA peak
i
<
2mAdc
Antenna earth terminals
50k
Ω
i
<
0.7mA peak
i<
1mAdc
Other terminals
This table is unofficial and for reference only. Be sure to confirm the precise values
for your particular country and locality.
NOTE
4
1. FRONT VIEWS FUNCTION
DV-T8D/T5D (T-5)
DV-T87/T57
DV-T6A1
DV-T8W/T5W
EXTERNAL VIEWS
5
DV-T8T/T5T
DV-T5M
DV-T56
DV-T59/T89
EXTERNAL VIEWS
6
DV-T5B/T1B
DV-T8L/T5L
DV-T8E/T5E
DV-T1T
EXTERNAL VIEWS
7
EXTERNAL VIEWS
DV-T53
F
G
G
3
POWER REWIND/REVIEW
STOP / EJECT FAST FORWARD / CUE
RECORD PLAY BACK
FRONT VIDEO / AUDIO INPUT JACK CHANNEL UP / DOWN
8
EXTERNAL VIEWS
2. REAR VIEWS FUNCTION
Hi-Fi REAR VIEW
4HD/2HD MONO REAR VIEW
3. REMOTE CONTROL
VR-F2PD VR-F2PC VR-F2TG
VR-F2CT VR-F2TH VR-F2RG
9
ELECTRICAL ADJUSTMENT
1. PLAYBACK PHASE
ADJUSTMENT PROCEDURE
1. Play back the test tape. (PAL-N(DP-2), PAL-M(DN-2))
2. Set the oscilloscope to the CHOP mode. Connect CH1 to the SW PULSE (PIN 3 of PT01)
3. Connect CH2 to the ENVE signal (PIN4 of PT01)
4. Insert PATH JIG and press "REC" button on the remote control.
5. Check the position of the V-sync from the rising edge of the SW pulse.
(Standard : 6.5H ± 1.5H)
ITEM MODE
ADJUSTMENT
POINT
CHECK POINT
TEST
EQUIPMENT
TEST
TAPE
INPUT
SIGNAL
6.5H
ADJUSTMENT
PLAY [REC] BUTTON
PIN 3 & PIN 4
OF PT01
OSCILLOSCOPE
(DP-2)
(PAL-N)
NO SIGNAL
6.5H
ADJUSTMENT
PLAY [REC] BUTTON
PIN 3 & PIN 4
OF PT01
OSCILLOSCOPE
PAL-M
(DN-2)
NO SIGNAL
ADJUSTMENT PARTS MEASURING POINT
PCB : MAIN - TOP VIEW
TMI
BLOC
PREAMP
PT01
TO PATH JIG
OSCILLOSCOPE
CH1 CH2
PATH JIG
10
SPECIFICATIONS
* Design and specification can be subjected to change without notice.
CHANNEL COVERAGE
INPUT/OUTPUT JACK TYPE
GENERAL
Power Requirement
Power Consumption
Temperature
Operating position
Dimensions (W x H x D)
Weight
Format
Tape Width
Tape Speed
Maximum Recording Time with full-size
cassette
AC 90~260V, 50Hz , 60Hz
Max. 17W (in REC mode)
5
C ~ 35 C (Operating)
-20 C ~ 60
C
Horizontal only
360 x 91 x 239 (mm)
Approx. 3.7 Kg
VHS standard
12.65mm
PAL (SP): 23.39mm/sec (LP) : 11.70mm/sec
NTSC (EP):11.12mm/sec (SP): 33.35mm/sec
PAL (SP): 240min, with E-240 video cassette
(LP):480min, with E-240 video cassette.
NTSC(SP):120min, with T-120 video cassette.
(EP):360min, with T-120 video cassette.
VIDEO
Signal system
Recording system
Input
Output
Signal-to-Noise ratio
Horizontal resolution
PAL colour and CCIR monochrome signals, 625 lines/50 fields
Rotary two-head helical scan with a slant double-azimuth
combination videohead
1.0Vp-p, 75ohms, unbalanced
1.0Vp-p, 75ohms, unbalanced
More than 43dB (SP)
220 lines
AUDIO
Recording system
Input
Output
Frequency Range
Signal to Noise Ratio
Audio Distortion
Longitudinal track
-8dBm(more than 47 k-ohms)unbalanced
-5.8dBm, (more than 47 k-ohms load),unbalaned
Normal:100Hz-10KHz(NTSC SP), 100Hz-8KHz(PAL-SP) HIFI: 20Hz-20KHz
HIFI : More than 65dB
Normal : Less than 4% (SP), HIFI : Less than 0.7%
TUNER
Tuning system
RF Output
FS Tuning system
On air(VHF channels 2-13),(UHF channels 14-69)
TIMER
Back up time
Clock exactness
2Hours (option)
In accordance with the exactness of power supply frequency (50Hz/60Hz)
ACCESSORIES
Provided Accessories Remote control unit, RF Cable, Battery
SYSTEM FS TUNING SYSTEM
CHANNEL
ON AIR
VHF Ch 2~13
UHF Ch 14-69CATV Ch X,Y,Z S1~S41
CATV
Channal 1(A-B),Channels14-36(A-W), Channel 37(W+1)upto94(W+58)
Channels 95-99(A-5-A-1), Channels 100-125(W+59-W+84)
Model
South America, Arhentina
Jack Type
RCA Jack (Phone Jack)
11
VOLTAGE CHART
A/V CHIP IC (IC301, LA71730)
PIN NO.
REC PB
PIN NO.
REC PB
PIN NO.
REC PB
PIN NO.
REC PB
1 0.84 0.08 26 1.56 3.1 51 0 0 76 2.36 1.42
2 0.84 0.01 27 2.15 2.1 52 1.9 2.3 77 1.55 2.69
3 2.39 2.24 28 4.59 3.93 53 2.32 2.3 78 2.68 3.33
4 2.36 0.01 29 0.7 2.65 54 1.9 1.9 79 2.48 1.79
5 2.33 0.01 30 0 0 55 5.0 5.0 80 4.42 0.97
6 2.22 0.01 31 2.72 2.66 56 1.89 1.89 81 1.1 1.1
7 2.22 0.04 32 3.98 3.97 57 1.84 2.08 82 0 0
8 2.22 2.23 33 1.99 1.98 58 2.17 2.85 83 0 0
9 2.22 2.23 34 2.02 2.52 59 2.89 2.90 84 0.6 3.33
10 2.66 2.24 35 2.52 2.52 60 1.37 1.22 85 0.78 0
11 0 2.28 36 3.78 3.78 61 1.19 1.19 86 1.59 0.33
12 0 0 37 2.05 2.03 62 0.03 0.03 87 4.26 1.93
13 2.21 0 38 2.21 2.20 63 1.6 2.25 88 4.24 1.92
14 1.0 0 39 9.48 9.48 64 0 0 89 4.24 1.92
15 2.21 2.21 40 0 0 65 1.65 1.73 90 4.25 1.93
16 5.0 0.01 41 0 0 66 1.67 5.0 91 5.83 5.0
17 4.45 0.15 42 5.0 5.0 67 0.34 0.34 92 0 0
18 5.0 5.0 43 2.27 2.34 68 4.95 4.95 93 0.76 0.76
19 5.0 5.0 44 0 4.13 69 4.89 4.87 94 0.76 0.76
EEPROM
(IC603, 24LC04B)
PIN NO. REC PB
1 0 0
2 0 0
3 0 0
4 0 0
5 5 5
6 5 5
7 0 0
8 5 5
12
H-FI IC (IC251, AN3663)
20 0 0 45 2.46 2.43 70 2.54 2.54 95 0.76 0.76
21 3.24 1.96 46 2.63 2.64 71 1.68 1.69 96 0.76 0.76
22 3.47 1.96 47 2.63 4.1 72 5.0 5.0 97 0 0
23 3.46 0 48 4.1 2.33 73 2.1 2.64 98 2.32 2.24
24 5.0 5.0 49 3.1 3.11 74 2.49 1.06 99 2.32 1.87
25 0.13 3.41 50 1.9 1.9 75 2.37 0.72 100 2.41 2.24
PIN NO.
REC PB
PIN NO.
REC PB
PIN NO.
REC PB
PIN NO.
REC PB
1 0.2 0.3 17 0.4 0.7 33 2.5 2.4 49 3.4 3.3
2 0.2 0.3 18 2.2 2.4 34 0.9 0.7 50 3.4 3.3
3 0.2 0.3 19 2.2 2.4 35 2.5 2.4 51 5.0 4.8
4 0.2 0 20 2.0 0 36 0 0 52 3.2 3.2
5 2.2 2.3 21 AC:2.0 0 37 1.5 1.5 53 DC1.2 5.7
6 2.2 2.4 22 AC:2.0 0 38 0 0 54 2.4 2.3
7 2.0 0 23 0 0 39 0 0 55 0 0
8 0.2 0.3 24 AC:2.0 0.6 40 5.0 4.8 56 0 0
9 0 0 25 5.0 0 41 0 0 57 5.6 0.6
10 0 0 26 2.0 0 42
datapulse
4.8 58 12.0 12.0
11 0 0 27
sw pulse
2.5 43
CLK pulse
4.8 59 5.6 5.8
12 0.2 2.0 28 4.0 4.0 44 2.2 0 60 1.0 0.73
13 2.6 2.4 29 4.5 1.7 45 0 0 61 2.3 2.4
14 0 0 30 4.5 1.7 46 3.4 3.3 62 2.3 2.2
15 0 0 31 1.0 1.7 47 3.0 2.4 63 2.5 2.53
16 2.4 2.4 32 2.5 2.4 48 2.2 2.1 64 0.4 0.48
PIN NO.
REC PB
PIN NO.
REC PB
PIN NO.
REC PB
PIN NO.
REC PB
VOLTAGE CHART
13
TMI (RF101, ALTMI-US5)
PIN NO.
REC PB
PIN NO.
REC PB
PIN NO.
REC PB
1 SIGNAL 0 7 SWEEP SWEEP 13 SIGNAL SIGNAL
2 5.1/0 5.1/0 9 PULSE PULSE 14 31.7 31.7
3 4.9 4.9 10 PULSE PULSE 16 SIGNAL SIGNAL
4 5.1/0 5.1 11 1.4 1.4
5 SIGNAL SIGNAL 12 SIGNAL SIGNAL
VOLTAGE CHART
RESET IC (IC602,BMR-0301G)
PHOTO COUPLER (IC802, PC17K1)
PIN NO.
REC PB
1 5.1 5.1
2 0 0
3 5.0 5.0
PIN NO.
REC PB
1 5 5
2 4 4
3 0 0
4 1.6 1.6
SMPS IC(IC801, ICE2B365)
PIN NO.
PLAY REC
100V 220V 100V 220V
1
5.6 5.6 5.6 5.6
2
1.72 1.63 1.78 1.67
3
0.02 0.01 0.02 0.01
4
127 274 124 270
7
12.8 13 12.9 13
14
1. POWER SUPPLY SCHEMATIC DIAGRAM (VCR S/A)
CIRCUIT DIAGRAM
15
2. SERVO & SYSCON SCHEMATIC DIAGRAM (VCR S/A)
CIRCUIT DIAGRAM
16
3. VIDEO/AUDIO SCHEMATIC DIAGRAM (HIFI)
CIRCUIT DIAGRAM
17
4. VIDEO/AUDIO SCHEMATIC DIAGRAM(MONO)
CIRCUIT DIAGRAM
18
CIRCUIT DIAGRAM
5. TMI & MPX SCHEMATIC DIAGRAM(HIFI)
19
CIRCUIT DIAGRAM
6.
TMI &MPX SCHEMATIC DIAGRAM(MONO)
20
WAVEFORMS ON VIDEO CIRCUIT
1. WAVEFORMS IN THE EE MODE(COLOR BAR INPUT)
2. WAVEFORMS OF THE LUMINANCE IN THE RECORD MODE(COLOR BAR INPUT)
3. WAVEFORM OF THE NTSC COLOR IN THE RECORD MODE(COLOR BAR INPUT)
Pin48,50,52 of IC301
(NTSC color bar input :
1.0Vp-p)
Pin 65 of IC301
(NTSC color bar output :
2.0Vp-p)
[1] [2]
Pin 88,89 of 94,95 IC301(NTSC)
(SP :3.2Vp-p)(EP : 2.6Vp-p)
Pin 46 of IC301
(0.4Vp-p)
Pin 43 of IC301
(0.4Vp-p)
[3] [4] [5]
Pin 21 of IC301
(0.4Vp-p)
[6]
Pin 67 of IC301
(C.SYNC : 5Vp-p)
[7]
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