Daewoo DPC-7301N User manual

REV. 0

(7.0-Inch) LCD Color Monitor &

DVD Player

MODEL : DPC-7301N LMD-6708RW）

2006/Aug.

-2-

CONTENTS

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

Specification....................................................... ............................................... ...

3~4

Block Diagram................................... ................................................................ ...

5~6

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

Troubleshooting........................................................................................... ... ... ..

8~9

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

10~17

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

18~33

Explode View........................................................................................................ ...... .

Schematic Diagram......................................................................................... ..... ..

35~43

-3-

SPECIFICATION

LCD MONITOR

Description Condition Unit Limit Nominal

Headphone Output 1kHz 0dB mW 3±23

Headphone Noise No Signal mV <1mV <1mV

L1kHz 0dB mW 600±100 600

SPK MAX Output(DVD) R1kHz 0dB mW 600±100 600

L1kHz 0dB mW 600±100 600

SPK MAX Output(AV IN) R1kHz 0dB mW 600±100 600

REF THD 1kHz 0dB %31

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 ±30

125Hz dB ±30

10kHz dB ±30

20kHz dB ±30

20Hz dB ±30

125Hz dB ±30

10kHz dB ±30

Headphone RESP

20kHz dB ±30

-4-

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 V0.6±0.2 0.7

Audio out level DVD 1kHz/0dB/10K V2+0/-0.6 1.4

20Hz dB ≤±30

125Hz dB ≤±30

10kHz dB ≤±30

FREQ RESP (DVD)

(20Hz~20kHz)

20kHz dB ≤±30

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 ≤30

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.

-5-

BLOCK DIAGRAM

LCD

-6-

DVD

-7-

GENERALALIGNMENT 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.

-8-

TROUBLESHOOTING

LCD

SYMPTOM CAUSE REMEDY

LCD MONITOR PART

1) Picture distortion &Defective capacitor (C202)

&Replace capacitor (C202).

2) No Picture &Defective IC (D3031).

&Replace IC (D3031).

3) No Picture, Picture no

Good

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

4) Color is no good &Defective X201.

&Replace X201.

5) SYNC no good &Defective IC CSC1004D. &Replace IC CSC1004D.

6) NO Picture

&Defective IC SS6608. &Replace SS6608.

7) Picture no good

&Defective CON4. &Replace CON4.

8) Brightness no good

&Defective IC SS9969. &Replace IC SS9969.

9) No Back Light

&Defective IC MP1029EM. &Replace IC MP1029EM.

-9-

DVD

SYMPTOM CAUSE REMEDY

DVD PART

1) No Power &Power source is not correct.

The positive and negative does not

match the unit.

&Power button defective.

&Defective triode U1(S-8521F33).

&Replace power source.

&Change the position of

positive and negative.

&Replace power button.

&Replace U1(S-8521F33).

2) No Picture &Defective T3 (24C02N).

&Defective T4 (S29AL0080).

&Defective U2 MTK1389DE.

&Replace T3 (24C02N).

&Replace T4 (S29AL0080).

&Replace U2 MTK1389DE.

3) No Sound &Defective U8 (4558D).

&Defective U6 (TDA2822).

&Replace U8 (4558D).

&Replace U6 (TDA2822)..

4) Sound no good &Defective U8 (4558D).

&Replace U8 (4558D).

5) Can not read DISC &Defective U3 (AT5654).

&PICK-up Laser is defective.

&Replace U3 (AT5654).

&Replace pick up.

6) No key function &Defective U2 IC MTK1389DE. &Replace U2 IC MT1389DE

7) No remote control function &Defective REMOTE.

&Key is Defective.

&Replace REMOTE.

Replace keys.

-18-

IC BLOCK DIAGRAM & DESCRIPTION

IC201 D3031

BLOCK DIAGRAM

VREF INV INV INV

BRIGHT BRIGHT BRIGHT

Ã Ã Ã

S/H S/H S/H

S/H

INT/EXTSW

MATRIX

DEMOD

R-Y

G-Y

B-Y

IDENT

F/F

PAL.SW

PHASE

SHIFT

TINT

VCO

APC

ACC.DET

ACC

REG1 REG2 REG3

TRAP

COLOR

COMP

Y/C CLAMP

AGCAMP

AGCDET

PICTURE

SW SYNCSEP

BGPGEN

BGP

Y/C

fromSYNCIN

IDENTFIL

TINT

VCO OUT

VCO IN

APC.FH

ACC.FIL

CIN

Y/C

COMP

FADJ

VIDEO IN BLK

FRP

S/H PULSEG

23 2421 2219 203637384846474561

1718 43 25 8 12 7

SW 394041

EXT RIN

EXT GIN

EXT BIN

PN VCC1

HPF

KIL.LER

B DC DET

B OUT

G DCDE T

G OUT

R DC DET

R OUT

SYNC.IN

SYNC

OUT

SYNC

SEP

PICTUREAGC

FILTER

AGC

OUT

CLAMP

COLOR

TRAPH FIL OUT

COMP

H.FILTER

VCC1

GNDVIE V

CC2 KILLE R FIL

BRIGHT

BRIGHTSUB B

SUB BRIGHT R

RGB AMPLITUDE

γ1

γ2

CONTRAST

PEAK LIMIT

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