Daewoo DV-S127W, DV-S107W, DV-S137W Service Manual

TABLE OF CONTENTS

SAFETY&PRECAUTIONS ...............................................................................................2

EXTERNAL VIEWS

1. FRONT VIEWS FUNCTION ............................................................................................................... 4

2. REAR VIEWS FUNCTION ................................................................................................................. 5

GENERAL ADJUSTMENT ............................................................................................. .6

SPECIFICATIONS .......................................................................................................7

PRINTED CIRCUIT BOARD ............................................................................................ 8

1. PCB MAIN ..................................................................................................................................... 8

2. PCB POWER(SMPS) ........................................................................................................................ 9

CIRCUIT DIAGRAM ..................................................................................................... 10

1. CONNECTION DIAGRAM .............................................................................................................. 10

2. POWER CIRCUIT ............................................................................................................................ 11

3. SERVO SYSCON CIRCUIT ............................................................................................................... 12

4. AV INPUT OUTPUT CIRCUIT .............................................................................................................. 13

5. VIDEO AUDIO CIRCUIT .................................................................................................................. 14

EXPLODING VIEWS & PARTS LIST

1. PACKING AS ................................................................................................................................. 15

2. SET TOTAL ASSEMBLY ..................................................................................................................... 16

3. FRONT PANEL ASSEMBLY ............................................................................................................... 17

ELECTRICAL PARTS LIST ............................................................................................... 18

1. PCB MAIN AS ................................................................................................................................ 18

2. PCB AUTO VOLT REGULATOR AS ................................................................................................. 24

3. DIFFERNCE PARTS LIST ................................................................................................................... 26

APPENDIX

(Appendix is provided only by internet http:\\svc.dwe.co.kr)

TROUBLE SHOOTING GUIDE ........................................................................................1

1. TROUBLE SHOOTING FLOW CHART ................................................................................................ 1

2. WAVEFORMS ON VIDEO CIRCUIT .................................................................................................. 18

3. µ-COM PIN ASSIGNMENT............................................................................................................... 21

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.) is greater 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

AC Line Voltage Region

100V

110 to 130V - 900V AC 1min.

* 110 to 130V

200 to 240V

* : Class model only

Africa the middle east Southeast Asia

Insulation

Resistance

¡Ã1§Û

/500V DC 1

¡Ã10§Û

/500V DC 4§Ç AC 1min.

Dielectric

Strength

§Ç

AC 1min.

Clearance

Distance(d),(d)

¡Ã

3.2mm

¡Ã

6mm(d)

¡Ã

8mm(d’)

(a :Power cord)

NOTE

This table is unofficial and for reference only. Be sure to confirm the precise values for your particular country and locality

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

§Ú

110 to 130V

110 to 130V 200 to 240V

Africa the middle east Southeast Asia

15k

§Þ

§Ú

NOTE

This table is unofficial and for reference only. Be sure to confirm the precise values for your particular country and locality.

i ¡Â1§Ì

i ¡Â

i ¡Â2§Ì

i ¡Â

i ¡Â1§Ì

rms

0.5§Ìrms

0.7§Ìpeak dc

0.7§Ì peak dc

Exposed accessible parts

Antenna earth terminals

Other terminals

EXTERNAL VIEWS

1. FRONT VIEWS FUNCTION

DV-S107W FRONT VIEW

STAND BY /ON

STOP / EJECT

RECORD

FRONT VIDEO AUDIO INPUT JACK

REWIND / REVIEW

FAST FORWARD / CUE

PLAY BACK

2. REAR VIEWS FUNCTION

DV-S107W PHONE JACK TYPE REAR VIEW

AUDIO/ VIDEO IN/OUT JACK

DC12V INPUT JACK

ANT INPUT

RF OUTPUT

EXTERNAL VIEWS

DV-S107W SCART JACK TYPE REAR VIEW

EURO AUDIO / VIDEO IN/OUT JACK

DC12V INPUT JACK

ANT INPUT

RF OUTPUT

GENERAL ADJUSTMENT

SERVO CIRCUIT

ITEM

Playback

Phase

ADJUSTMENT

PARTS

R591

LOCATION OF ADJUSTMENT PARTS OBSERVATION WAVEFORM

F R O N

R59

ADJUSTMENT PROCEDURE

TJ591

(V. SW)R591

CHECK POINT TEST EQUIPMENTS MODE TEST TAPE

TJ591(V.SW)

TJ391(VIDEO OUT)

TJ391

PRE-AMP

(VIDEO OUT)

SMPS

Oscilloscope Play DP-2

A/V JACK

1. Preparation Playback the test tape (DP-2). Set the oscilloscope to the CHOP mode. Connect CH1 to the V.SW PULSE (TJ591) and CH2 to the VIDEO OUT (TJ391) and trigger the scope with the signal from CH1.

2. Adjustment Adjust R591 to the positive rising edge of V.SW PULSE at 6.5H ±0.5H from the V-SYNC.

3. Adjustment Inspection Standard

6.5H ± 0.5H

4. REMARKS

SPECIFICATIONS

SYSTEM

Video signal RF Output

VIDEO

Input : Video line in Output : Video line out Recording system Signal to Noise ratio

Horizontal Resolution

AUDIO

Input : Audio line in Output : Audio line out Frequency Response Signal to Noise Ratio Audio Distortion

TAPE TRANSPORT

Format Tape Width Tape Speed

Maximum Recording Time FF/REW time

GENERAL

Power Requirements Power Consumption

Temperature Operating position

DIMENSIONS

Carton size (W x H x D) Set size (W x H x D) Weight

PAL/MESECAM/NTSC colour (for DV-S107W Series) PAL-N/NTSC colour (for DV-S107A Series) NTSC colour (for DV-S107N Series) PAL-G/K/I UHF CH22 ~ CH40 (for DV-S107W & DV-S107S Series) NTSC-M VHF CH3 OR CH4 (for DV-S107A & DV-S107N Series)

75 ohms unbalanced, sync. 75 ohms unbalanced, sync. Negative Rotary two-head helical scan More than 45dB (PAL-SP) More than 43dB (NTSC-SP) 240 Lines (PAL-SP) 210 Lines (NTSC-SP)

-8dBm, (CENELEC standard), more than 47, unbalanced

-6dBm, (CENELEC standard), less than 1, unbalanced 100Hz ~ 8KHz ( for PAL-SP) 100Hz ~10KHz (for NTSC-SP) More than 38dB (for PAL-SP) More than 40dB (for NTSC-SP) Less than 3% (SP)

VHS standard

12.65 (1/2) PAL SP : 23.39mm/sec PAL LP :11.70mm/sec NTSC-SP : 33.35/sec. NTSC-EP : 11.12/sec. 480min, with E-240 tape (PAL-LP) 540min, with T-180 tape (NTSC-EP) about 5min, with T-120 tape

AC 90V ~ 260V, 50/60Hz DC12V ~ 16V (2A) Max. 14W (in REC mode) 5°C ~ 35°C (Operating)

-20°C ~ 60°C (Storage) Horizontal only

417 x 172 x 369 mm 280 x 91 x 347 mm

3.5 Kg