Daewoo DPC-7301N Service Manual

REV. 0

(7.0-Inch) LCD Color Monitor &

DVD Player

MODEL : DPC-7301N（LMD-6708RW）

2006/Aug.

CONTENTS

----------------

Specification.......................................................…...............................................…………….…..

3~4

Block Diagram...................................…................................................................…………….…..

General Alignment Instruction.......................................................................……….…….....…

Troubleshooting...........................................................................................…...……………...…..

Printed Circuit Board........................................................................................……………...…...

IC Block Diagram & Description........................................................................…………..…..

Explode View........................................................................................................…………......….

Schematic Diagram.........................................................................................…………….....…..

-2-

5~6

7

8~9
10~17
18~33

34

35~43

SPECIFICATION

LCD MONITOR

Description Condition Unit Limit Nominal

Headphone Output 1kHz 0dB mW 3±2 3

Headphone Noise No Signal mV <1mV <1mV

L 1kHz 0dB mW 600±100 600

SPK MAX Output(DVD)

R 1kHz 0dB mW 600±100 600

L 1kHz 0dB mW 600±100 600

SPK MAX Output(AV IN)

R 1kHz 0dB mW 600±100 600

REF THD 1kHz 0dB % 3 1

Headphone S/N Infinity zere/-dB/L&R∝ dB ≥50 ≥50

Luminance(MAX) White Signal LUX 300±50 300

Luminance(8step) White Signal LUX 250±50 250

Luminance(MIN) White Signal LUX 100±50 100

20Hz dB ±3 0

125Hz dB ±3 0

L

10kHz dB ±3 0

20kHz dB ±3 0

Headphone RESP

20Hz dB ±3 0

125Hz dB ±3 0

R

10kHz dB ±3 0

20kHz dB ±3 0

-3-

DVD

Description Condition Unit Limit Nominal

Video Signal Level Vp-p 0.7±0.1 0.7

SYNC Level Vp-p 0.3±0.1 0.3

Video out level

75% color bar/75ohm

Vp-p 1.0±0.2 1

Video out level(Unload) 75% color bar Vp-p 2.0±0.2 2

CD 1kHz/0dB/10K V 0.6±0.2 0.7

Audio out level

DVD 1kHz/0dB/10K V 2+0/-0.6 1.4

20Hz dB ≤±3 0

FREQ RESP (DVD)
(20Hz~20kHz)

125Hz dB ≤±3 0

10kHz dB ≤±3 0

20kHz dB ≤±3 0

Signal-to-noise radio Infinity zere/-dB/L&R∝

dB ≥60 ≥60

Audio distortion & noise (DVD) 1kHz/0dB/L&R dB ≤-65 -65

Dynamic range (DVD) 1kHz/-60dB dB ≥85 ≥85

R/L Cross sound (DVD) 1kHz/0dB/L&R dB ≥45 ≥45

1kHz Channel unbalance 1kHz/0dB/L&R dB ≤3 0

Power Consumption Standby W ≤1 ≤1

DC 9V Rating W ≤12 ≤12

Power Standby (Battery Current) Standby uA ≤10 ≤10

ECC Entircity A BEX TDV-552 um ≥100 100

Scratch A BEX TDV-541 mm ≥1.6 1.6

Black dot A BEX TDV-545 mm ≥ф0.8 0.8

Finger Print A BEX TDV-545 um ≥ф65 65

Vertical deviation A BEX TDV-533 mm ≥0.6 0.6

Note: Nominal specs represent the design specs. All units should be able to approximate these. Some will
exceed and some may drop slightly below these specs. Limit specs represent the absolute worst condition that
might still be considered acceptable. In no case should a unit fail to meet limit specs.

-4-

LCD

BLOCK DIAGRAM

-5-

DVD

-6-

GENERAL ALIGNMENT INSTRUCTION

The Main PCB of Monitor Modification:

1. Input voltage is 6.8V-16V, input signal is test circuit BY 5418.

2. Adjust VR1 to get test point: 15720Hz..

3. Adjust VR1 to get horizontal phase shift.

4. Adjust VRB4 to get good performance.

The main PCB of DVD Modification:

1. Adjust the brightness to the brightest by VR, adjust video pattern’s color to white, test the screen
Brightness is 200±102 LUX.
With luminometer You can adjust R69 to get this standard.

-7-

LCD

SYMPTOM CAUSE REMEDY

LCD MONITOR PART

TROUBLESHOOTING

1) Picture distortion

2) No Picture

3) No Picture, Picture no
Good

4) Color is no good

5) SYNC no good

6) NO Picture

7) Picture no good

8) Brightness no good

& Defective capacitor (C202)

& Defective IC (D3031).

& Defective IC (CSC 3414A). & Replace IC (CSC 3414A).

& Defective X201.

& Defective IC CSC1004D. & Replace IC CSC1004D.

& Defective IC SS6608. & Replace SS6608.

& Defective CON4. & Replace CON4.

& Defective IC SS9969. & Replace IC SS9969.

& Replace capacitor (C202).

& Replace IC (D3031).

& Replace X201.

9) No Back Light

& Defective IC MP1029EM. & Replace IC MP1029EM.

-8-

DVD

Replace keys.

DVD PART

SYMPTOM CAUSE REMEDY

1) No Power

2) No Picture

3) No Sound

4) Sound no good

& Power source is not correct.

The positive and negative does not
match the unit.

& Power button defective.
& Defective triode U1(S-8521F33).

& Defective T3 (24C02N).
& Defective T4 (S29AL0080).
& Defective U2 MTK1389DE.

& Defective U8 (4558D).
& Defective U6 (TDA2822).

& Defective U8 (4558D).

& Replace power source.
& Change the position of

positive and negative.

& Replace power button.
& Replace U1(S-8521F33).

& Replace T3 (24C02N).
& Replace T4 (S29AL0080).
& Replace U2 MTK1389DE.

& Replace U8 (4558D).
& Replace U6 (TDA2822)..

& Replace U8 (4558D).

5) Can not read DISC

6) No key function

7) No remote control function

& Defective U3 (AT5654).
& PICK-up Laser is defective.

& Defective U2 IC MTK1389DE. & Replace U2 IC MT1389DE

& Defective REMOTE.
& Key is Defective.

& Replace U3 (AT5654).
& Replace pick up.

& Replace REMOTE.
&

-9-

IC201 D3031

IC BLOCK DIAGRAM & DESCRIPTION

BLOCK DIAGRAM

R

A M PLITUDE

BRIG HTSUB B

BRIG HT

BRIGHT

BLK

FRP

26

29

B OUT

B DC DET

23 2421 2219 203637384846474561

32

SUB

RGB

27

28

10

CONTRAST

PEAK LIMIT

γ1

γ2

S/H PULSEG

S/H PULSEG

9

34

42

31

30

S/H PULSEG

33

35

S/H

S/H

G OUT

G DC D E T

R OU T

R DC DET

SYNC.IN

OU T

SYNC

SEP

SYNC

PIC TUREAGC

FI LTER

AGC

OUT

C LAMP

COLOR

TRAPH FIL OUT

SYNCSEP

SW

2

BGPGEN

PICTURE

AGCAMP

AGCDET

COMP

Y/C
P

N

TRAP

H.FILTER

3

INV INV

INV

VREF

BGP

CLAMP

REG3

REG2

REG1

C O MP

41

BRIGHT BRIGHT BRIGHT

COLOR

COMP

Y/C

HPF

ACC

5

ACC.DET

Y/C

¦ Ã ¦ Ã ¦ Ã

KIL.LER

APC

15

14

S/H

S/H

S/H

394041

EXT B IN

INT/EXTSW

7

γ

MATRIX

R-Y

G-Y

B-Y

DEMOD

P
N

SHIFT

PHASE

VCO

TINT

16

13

P

IDENT

PAL.SW

from

4

SW

N

KILLER F IL

F/F

V

CC1

V

SYNC IN

171 8 43 2 5 8 12

GNDV

EXT G IN

EXT R IN

CC1

V

PN

CC2

IE

FADJ

VID EO IN

CIN

ACC.FIL

-18-

APC.FH

VCO IN

TINT

VCO OUT

IDENTFIL

CC1

V

IC201 D3031

APC FILTER

SYNC OUT

SYNC SEP

EXT B IN

EXT G IN

EXT R IN

CONTRAST

Vcc1

F AD J

CLAMP

AGC FILTER

AGC OUT

PICTURE

37
38
39
40

41
42
43
44
45

46
47
48

SYNC IN

S/H PULSE B

S/H PULSE G

S/H PULSE R

BRIGHT

GAMMA2

GAMMA1

FRP

SUB BRIGHT B

SUB BRIGHT R

BLK

Vcc2

252627282930313233343536

24

B OUT

B DC DET

23
22

G OUT
G DC DET

21

R OUT

20

R DC DFT

19

V

EE

18

GND

17

V C0 OUT

16
15

Vc0 IN

14

TINT

13

1 2

TRA P

3

VIDE O IN

H FILTER OUT

5 6

4

C IN

COLO R

IDEN T FILTER

8 9 10

7

SW

11 12

ACC FILTER

KILL E R FILTER

PEA K LIMI T T E R

RGB AMP LI T UDE

R-Y/B-Y PHASE

Pin

Name Pin Name Pin Name Pin Name

1. TRAP 13. TINT 25. VCC 2 37. SYNC OUT

2. H FILTER OUT 14. VCO IN 26. BLK 38. SYNC SEP

3. VIDEO IN 15. APC FILTER 27. SUB BRIGHT R 39. EXT B IN

4. IDENT FILTER 16. VCO OUT 28. SUB BRIGHT B 40. EXT G IN

5. C IN 17. GND 29. FRP 41. EXT R IN

6. COLOR 18. VER 30. GAMMA1 42. CONTRAST

7. SW 19. R DC DET 31. GAMMA2 43. VCC1

8. KILLER FILTER 20. R OUT 32. BRIGHT 44. F ADJ

9. PEAK LIMITTER 21. G DC DET 33. S/H PULSE R 45. CLAMP

10. RGB AMPLITUDE 22. G OUT 34. S/H PULSE G 46. AGC FILTER

11. ACC FILTER 23. B DC DET 35. S/H PULSE B 47. AGC OUT

12. R-Y/B-Y PHASE 24. B OUT 36. SYNC IN 48. PICTURE

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