Daewoo DVST1C1WX-BG/D User manual

Service Manual
S/M No.:. : VTC1C1WET0
Jan. 2002
DAEWOO ELECTRONICS CO., LTD.
http : //svc.dwe.co.kr
Video Cassette Player
Model:
DVST1C1WX - BG / D
DVST1C1WX - BG / E
DVST1M1WX - BB / D
DVST1M1WX - BB / E
DV - T1M1WX - BB / D
DV - T1M1WX - BB / E
DV - T1B1WX - BB / D
ALL T4 - MECHA
1B1W
1C1W
1M1W
✔ Caution
: In this Manual, some parts can be changed for improving, their
performance without notice in the parts list. So, if you need the
latest parts information,please refer to PPL(Parts Price List) in
Service Information Center (http://svc.dwe.co.kr).

1
TABLE OF CONTENTS
SPECIFICATION..........................................................................................................2
CIRCUIT DIAGRAM & WAVE FORM ............................................................................ 3
INTERCONNECT WIRING DIAGRAM .................................................................................................... 3
POWER SUPPLY SCHEMATIC DIAGRAM(MIDDLE EAST) .................................................................. 4
POWER BLACK DIAGRAM ..................................................................................................................... 6
SERVO & SYSCON SCHEMATIC DIAGRAM(MIDDLE EAST) ............................................................... 7
SERVO & SYSCON BLOCK DIAGRAM .................................................................................................. 9
VIDEO/AUDIO SCHEMATIC DIAGRAM .................................................................................................. 10
PCB CIRCUIT BOARD ..................................................................................................15
COMPONENTS LOCATION ....................................................................................... 17
ELECTRICAL PARTS LIST ........................................................................................... 18
APPENDIX (Appendix is provided only by internet http://svc.dwe.co.kr)
TROUBLESHOOTING GUIDES
VIDEO PLAYBACK PATH FOR PAL ....................................................................................................... 12
PIF SCHEMATIC DIAGRAM .................................................................................................................... 13

2
SPECIFICATIONS
* Design and specification can be subjected to change without notice.
*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 90~250V, 50Hz , 60Hz
Max. 14W (in REC mode)
5
° C ~ 35 ° C (Operating)
-20 ° C ~ 60 ° C (Storage)
Horizontal only
360 x 91 x 239 (mm)
Approx. 3.8 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/MESECAM/NTSC color signal
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)
240 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 1 k-ohms load),unbalaned
100Hz-10KHz(NTSC SP), 100Hz-8KHz(PAL-SP)
More than 40dB (PAL-SP)
Normal : Less than 4% (SP), HIFI : Less than 0.7%
RF Output 21 ~ 40 CH(Adjustable)
ACCESSORIES
Provided Accessories Remote control unit, RF Cable, Battery
SCART JACK
RCA JACK(PHONE JACK)
DVST1C1WX-BG/E,DVST1M1WX-BB/E,DV-T1M1WX-BB/E
DVST1C1WX-BG/D,DVST1M1WX-BB/D,DV-T1M1WX-BB/D,DV-T1B1WX-BB/D
<SCART JACK> <RCA JACK(phone jack)>

3
INTERCONNECT WIRING DIAGRAM

4
POWER SUPPLY SCHEMATIC CIRCUIT DIAGRAM(MIDDLE EAST)

5
LOC. PIN EE PLAY REC.
IC801 1 5.5 5.5 5.5
2 4.4 4.4 4.4
3 0.8 0.8 0.8
4 5.6 5.6 5.6
LOC. PIN EE PLAY REC.
IC802 1 2.5 2.5 2.5
2000
3 4.4 4.4 4.4
POWER MODE
LOC. PIN EE PLAY REC.
Q801 G 290 290 290
D 200 200 200
S 250 250 260
Q802 G 0 0 0
D 250 250 260
S000
Q803 E 0 0 0
B000
C111
Q804 E 0 0 0
B 0.4 0.4 0.4
C111
Q805 E 12.6 12.6 12.6
B 13.2 13.2 13.2
C 14.7 14.3 15
Q806 E 0 0 0
B 0.3 0.3 0.3
C 13.2 13.2 13.2
Q807 E 5.3 5.3 5.3
B666
C 5.8 5.8 5.8
! Q801 “D” X : 20V DIV
Y : 5uS DIV @ Q801 “G” X : 100V DIV Y : 5uS DIV # T801 PIN 2 X : 5V DIV Y : 5uS DIV
$T801 PIN 4 X : 100V DIV
Y : 5uS DIV % T801 PIN 6 X : 1V DIV Y : 2mS DIV ^ IC801 PIN3 X : 0.1V DIV Y : 5uS DIV
$ IC801 PIN 4 X : 2V DIV
Y : 5uS DIV

6
POWER BLOCK DIAGRAM

7
SERVO & SYSCON SCHEMATIC DIAGRAM(MIDDLE EAST)

8
SYSCON MODE
LOC. PIN EE PLAY REC.
IC601 1 5.1 5.1 5.1
2000
3 0.2 0.2 0.4
4 2.1 2.1 2.1
5000
6 5.1 5 5.1
7000
8 0.1 0.1 0.4
9 0.1 0.1 0.4
10 1.8 2.6 1.4
11 1.1 1.1 1.1
12 0.6 0.6 0.6
13000
14 5.2 5.2 5.2
15 5 2.5 2.5
16555
17 0 0.1 0.3
18 2.5 2.5 2.5
19 2.5 2.5 2.5
20 0.6 0.6 0.6
21 0.6 0.6 0.6
22 0.6 0.6 0.6
23 0.6 0.6 0.6
24 0.6 0.6 0.6
25 0.6 0.6 0.6
26 0.6 0.6 0.6
27 0.6 0.6 0.6
28555
29555
30 5 0.5 5
31 5 5 0.6
32 0.6 0.6 0.6
33000
34555
35 0.2 0.2 0.3
36 0.2 0.2 0.2
37555
38222
39 2.3 2.3 2.3
40000
41 2.3 2.3 2.3
42 2.3 2.3 2.3
43555
44 2.8 2.8 2.8
45 2.8 2.8 2.8
46000
47 1.8 1.8 1.8
48000
49000
50 1.9 1.9 1.9
51 2.8 2.8 2.8
52 1.9 1.9 1.9
53 5.2 5.2 5.2
54 2.1 2.1 2.1
55000
56110
57000
58 0.3 0.3 0.3
59550
60 4.9 4.9 4.9
61 4.9 0 0
SYSCON MODE
LOC. PIN EE PLAY REC.
IC601 62 0 4.9 4.9
63000
64 0 0 4.9
65 0 4.9 4.9
66 4.9 0 0
67000
68 1.5 1.5 1.5
69000
70000
71 4.2 4.5 4.5
72 4.3 4.5 4.5
73 2.2 2.2 0.2
74 0 4.9 0
75 0.3 0.3 0.3
76 0 2.5 2.5
77 0 2.7 2.7
78000
79 0 0°Í5 0°Í5
80 0 0°Í5 0°Í5
81000
82000
83000
84 4.9 0 0
85000
86 2.4 0.2 0.2
87 1.2 2.5 2.5
88000
89 4.5 2 2.1
90 0.2 0.3 0.3
91 2.5 2.5 2.5
92 2.5 2.5 2.5
93 2.4 0 0
94 2.5 2.5 2.2
95 2.5 2.5 2.7
96 2.5 2.5 2.5
97 2.5 2.5 2.5
98 5.1 5.1 5
99 5.1 5.1 5
100 0 0 0
SYSCON MODE
LOC. PIN EE PLAY REC.
IC603 1000
2000
3000
4000
5 4.3 4.5 4.5
6 4.3 4.5 4.5
7000
8555
SYSCON MODE
LOC. PIN EE PLAY REC.
IC604 1000
2 0.4 0.4 0.3
3 0.8 0.8 0.8
4 7.3 7.3 7.3
5000
6000
7 13.2 12.7 13.5
8 13.2 12.7 13.5
9 0.8 0.8 0.8
10 0.4 0.4 0.3
! IC601 PIN97 X : 1V DIV
CTL AMP OUT Y : 5uS DIV @ IC601 PIN89 X : 1V DIV DRUM FG Y:0.5mS DIV # IC601 PIN87 X : 1V DIV CAPSTAN FG Y:0.5mSDIV
$ IC601 PIN76 X : 1V DIV
CAPSTAN PWM Y : 5uS DIV % IC601 PIN71 X : 1V DIV SERIAL CLK Y :0.1mS DIV ^ IC601 PIN72 X : 1V DIV SERIAL DATA Y : 0.1mS DIV

9
SERVO & SYSCON BLOCK DIAGRAM