Daewoo DPC-7200N User manual

S er v ice M a nua l

LCD Color Monitor &

DVD Player

Model: DPC-7200N

S/ M No. : OSPC7200N1

May. 2005

C aution

: In this Manual, some parts can be changed for improving,

their performance without notice in the parts list.

-2-

CONTENTS

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

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

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

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

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

PrintedCircuitBoard........................................................................................ ... ...

ICBlock Diagram and LeadIdentification....................................................... .. ..

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

SchematicDiagram......................................................................................... ..... ..

-3-

SPECIFICATION

LCD MONITOR

Model No.: DPC-7200N Output: 50mW/16ohm SupplyVoltage:

Description Condition Unit

LimitNominal

Headphone Output1KHz0dB mW

3±23

Headphone NoiseNo Signal mV

<1mV<1mV

L1KHz0dB mW

600±100

600

SPK MAXOutput R1KHz0dB mW

600±100

600

L1KHz0dB mW

600±100

600

SPK MAXOutput(AV IN) R1KHz0dB mW

600±100

600

REF THD 1KHz0dB %53

SPK S/N Infinity zere/-dB/L&R

dB 35 35

Headphone S/N Infinity zere/-dB/L&R

dB 60 60

Luminance(MAX)White Signal LUX

300±50

300

Luminance(8STEP)White Signal LUX

250±50

250

Luminance(MIN)White Signal LUX

100±50

100

20HzdB ±30

125HzdB ±30

10KHzdB ±30

20KHzdB ±30

20HzdB ±30

125HzdB ±30

10KHzdB ±30

Headphone RESP

20KHzdB ±30

-4-

DVD

Model No.: DPC-7200N Output:50mW/16ohm Supply Voltage:

Description Condition Unit

LimitNominal

VideoSignal LevelVp-p

0.7±0.1

0.7

SYNC LevelVp-p

0.3±0.1

0.3

Videoout level

75% color

bar/75ohm Vp-p

1.0±0.2

Videoout level(Unload) 75%color bar

Vp-p

2.0±0.2

CD 1KHz/0dB/10K

V2.0±0.2

Audio out level DVD

1KHz/0dB/10K V2.0±0.2

20Hz dB ≤±3 0

125Hz dB ≤±3 0

10KHz dB ≤±3 0

FREQ RESP (DVD)

(20Hz~20KHz)

20KHz dB ≤±3 0

Signal-to-noiseradio Infinity zere/-dB/L&R

dB 60 60

Audiodistortion&noise(DVD) 1KHz/0dB/L&R

dB ≤-65 -65

Dynamicrange(DVD) 1KHz/-60dB dB 85 85

R/L Cross sound(DVD) 1KHz/0dB/L&R

dB 45 45

1KHzChannel unbalance(DVD)

1KHz/0dB/L&R

dB ≤3 0

Power Consumption StandbyW00

DC 9V Rating W ≤12 ≤12

ECC EntircityABEXTDV-552

100 100

Scratch ABEXTDV-541

1.6 1.6

Black dotABEXTDV-545

ф0.8

0.8

Finger Print ABEXTDV-545

ф65

Verticaldeviation ABEXTDV-533

0.6 0.6

Note: Nominal specs represent the design specs. All units should be abletoapproximate these. Somewill

exceed and some maydrop slightlybelow these specs.Limit specsrepresent the absolute worstcondition that

might still be considered acceptable. In no case should a unit fail to meet limit specs.

-5-

BLOCK DIAGRAM

LCD

OZ9936

IR3Y31

RT9266

+12V

+7V

-10V

”

H.V.

TRAN

-6-

DVD

1234

4321

MPEGDECODER

RISCCONCROL

MTK1389D

EEPROM

AT24C02-SOP8

ICDATA

ICCLK

SERVODRIVER

CD5954

SPINDLEVELOCITYERROR

FETEDRIVER

PICKUP

FOCUSTRACKSLEDDRIVER

MOTORVELOCITY

RFSIGNALGROUP

27.000MHZ

8BITBUS

KEYSIGAL

16BITBUS

SDAM4Mx16BIT

FLASH1Mx8BIT

DECODERMICROCODE

REMOTE

SENSOR

AUDIODACAUDIO

AMP

FILTER

VIDEODAC

VIDEOOUT

AUDIODATABUS

L&R

L&ROUT

+9VINPUT

DC/DCCONVERT

+5V+3.3V

DC/DCCONVERT

8032MCU

SERVODSP

KEYBOARD

DVDDECK

-7-

GENERAL ALIGNMENTINSTRUCTION

TheMain PCB of Monitor Modification:

1. Input voltage is 6.8V-16V, input signal is test circuit BY5418.

2. Adjust VRT5 to get test point: 15720Hz..

3. Adjust VRT4 to get horizontal phase shift.

4. Adjust VRT1 to get good performance.

5. Adjust S201. S202 to get good Tint.

Themain PCBof DVD Modification:

1. Adjust the brightness to the brightest byVR, adjust video pattern’scolor to white, test the screen

Brightness is 200±102 LUX.

With luminometer You can adjust R69 to get this standard.

-8-

TROUBLESHOOTING

LCD

SYMPTOM CAUSEREMEDY

LCD MONITOR PART

1) Picture distortion &Defective capacitor (C201)

&Replace capacitor C201.

2) No Picture &Defective IC (IR3Y31).

Replace IC IR3Y31.

3) No Picture, Picture no

Good

&Defective Q7, Q8. &Replace Q7, Q8.

4) Color is no good &Defective X201.

&Replace X201.

5) SYNC no good &Defective IC 8D02. &Replace IC 8D02.

6) TINT no good &Defective S201, S202

Replace S201,S202.

7) NO Picture

&Defective IC RT9266. &Replace RT9266.

8) Picture no good

&Defective CON1. &Replace CON1.

9) Brightness no good

&Defective IC M5237 Q10. &Replace IC M5237 Q10.

-9-

DVD

SYMPTOM CAUSEREMEDY

DVD PART

1)No Power &Power source is not correct.

The positive and negative does not

match the unit.

&Power button defective.

&Defective triode U7.

&Replace power source.

&Change the position of

positive and negative.

&Replace power button.

&Replace U7.

2)No Picture &Defective U10 (24C02N).

&Defective U5.

&Defective IC MTK1389D.

&Replace U10 (24C02N).

&Replace U5.

&Replace IC MTK1389D.

3)No Sound &Defective U14 (C4558).

&Defective U1 (14053).

&Defective U2.

&Replace U14 (C4558).

&Replace U1 (14053).

&Replace U2.

4)Sound no good &Defective U14.

&Replace U14.

5)Can not read DISC &Defective U18.

&PICK-up Laser is defective.

&Replace U18.

&Replace pickup.

6)No keyfunction &Defective IC MTK1389D. &Replace IC MTK1389D.

7)No remote control function &Defective REMOTE.

Keyis Defective.

&Replace REMOTE.

Replace keys.

-10-

PRINTED CIRCUITBOARD

Monitor MainPCB

Top View

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