Daewoo DP-42GM User manual

Service Manual

42" PLASMA PDP MONITOR

CHASSIS : SP-115

S/M No. : DSP115BEF0

Nov. 2002

DAEWOO ELECTRONICS Corp.

http ://svc.dwe.co.kr

Contents

1.Safety Precaution 5

2. Product Specification 6

2-1. SPECIFICATION 6

2-2. Available Input Signal 8

3. BLOCK DIAGRAM 10

4. Description Of Each BLOCK 11

4-1. A/V BLOCK 11

4-1-1. A/V BLOCK DIAGRAM 11

4-1-2. VIDEO PCB 12

4-1-3. JACK PCB 16

4-1-4. KEY PCB 17

4-1-5. LED PCB 17

4-2. DRIVING BLOCK 18

4-2-1. DRIVING BLOCK DIAGRAM 18

4-2-2. DRIVING WAVEFORM 19

4-2-3. DIGITAL PCB 21

4-2-4. X-SUS PCB 25

4-2-5. Y-SUS & SCAN PCB 27

4-2-6. CONNECTION PCB & DATA COF 29

4-3. POWER BLOCK 30

4-3-1. POWER BLOCK DIAGRAM 30

4-3-2. POWER PCB 31

5. SERVICE MODE 33

5-1. Entering SERVICE MODE 33

5-2. Default Values For SERVICE MODE Items 33

5-3. Description Of SERVICE MODE Items 34

6. Adjusting Method 37

6-1. Adjusting WHITE BALANCE 37

6-2. Adjusting DRIVING VOLTAGE And WAVEFORM 38

6-2-1. Adjusting POWER PCB 38

6-2-2. Adjusting X-SUS PCB 39

6-2-3. Adjusting Y-SUS PCB 39

FIG <6-1>. X-SUS PCB Adjusting Points 41

FIG <6-2>. Y-SUS PCB Adjusting Points 42

7. SOFTWARE UPGRADE Method 43

8. SET Disassemble/Assemble Method 46

8-1. Facts You Must Know When Disassembling/Assembling PDP SET 46

8-2. PCB Disassemble/Assemble Method 46

8-3. FRONT MASK Disassemble/Assemble Method 47

8-4. FILTER GLASS Disassemble/Assemble Method 47

-2-

9. Main PCB Trouble Diagnosis 49

9-1. VIDEO & JACK PCB Trouble Diagnosis 49

9-2. DIGITAL PCB Trouble Diagnosis 55

FIG<9-1>. DIGITAL PCB LAYOUT 61

9-3. X-SUS PCB Trouble Diagnosis 62

9-4. Y-SUS & SCAN PCB Trouble Diagnosis 65

9-5. CONNECTION PCB & DATA COF Trouble Diagnosis 71

9-6. POWER PCB Trouble Diagnosis 72

10. TROUBLE SHOOTING 73

10-1. Facts You Must Know When Diagnosing And Repairing 73

10-2. Representative Symptoms When Each PCB Breaks Down 73

10-3. Trouble Diagnosis And Repairing Method For Representative Symptoms 77

FIG<10-1> Trouble Diagnosis Flow when SHUT DOWN occurs 80

FIG<10-2> Trouble Diagnosis Flow when Low Voltage SHUT DOWN occurs 81

FIG<10-3> Trouble Diagnosis Flow when High Voltage SHUT DOWN occurs 82

FIG<10-4> Trouble Diagnosis Flow when Abnormal Discharge occurs 83

11. ASSEMBLY LIST 84

12. EXPLODED VIEW 85

13. FIGURE COLLECTION 86

FIG<1>. TOTAL 86

FIG <2>. Y-SUS & SCAN 87

FIG <3>. X-SUS 88

FIG <4>. VIDEO & JACK 89

FIG <5>. POWER 90

FIG <6>. INLET 91

FIG <7>. LEFT-UP 92

FIG <8>. LEFT-DOWN 93

FIG <9>. RIGHT-UP 94

FIG <10>. RIGHT-DOWN 95

FIG <11>. WITHOUT JACK 96

FIG <12>. DIGITAL 97

FIG <13>. AC SWITCH ASSEMBLY 98

FIG <14>. SCAN ASSEMBLY1 99

FIG <15>. SCAN ASSEMBLY2 100

FIG <16>. X-SUS ASSEMBLY 101

FIG <17>. FRONT MASK ASSEMBLY 102

FIG <18>. FRONT MASK INSIDE 103

FIG <19>. BACK COVER 104

FIG <20>. POWER ADJUSTING POINTS 105

FIG <21>. POWER HIGH VOLTAGE SWITCH 106

FIG <22>. HOW TO ADJUST VOLTAGE 107

-3-

FIG <23>. Y-SUS & SCAN PCB DIODE TEST 108

FIG <24>. SCANH PCB DIODE TEST 109

FIG <25>. SCANL PCB DIODE TEST 110

FIG <26>. 5 STEP GRAY SCALE PATTERN 111

14. Trouble Symptom Picture 112

Trouble Symptom Picture<1>. 112

Trouble Symptom Picture <2>. 113

Trouble Symptom Picture <3>. 114

Trouble Symptom Picture <4>. 115

Trouble Symptom Picture <5>. 116

Trouble Symptom Picture <6>. 117

Trouble Symptom Picture <7>. 118

Trouble Symptom Picture <8>. 119

Trouble Symptom Picture <9>. 120

Trouble Symptom Picture <10>. 121

Trouble Symptom Picture <11>. 122

Trouble Symptom Picture <12>. 123

-4-

1. Safety Precautions

-5-

(1) When moving or laying down a PDP Set, at least two people must be working. Avoid any impact

towards the PDP Set.

(2) Do not leave the broken PDP Set on for a long time. To prevent any further damages, after check the

broken Set s condition, make sure to turn the power (AC) off.

(3) When opening the BACK COVER, turn off the power (AC) to prevent electric shock. When a PDP is

on, high voltage and high current exist inside the Set.

(4) When loosening screws, check the connecting position and type of the screw. Sort out the screws and

store them separately. Because screws holding PCB are working as electric circuit GROUNDING,

make sure to check if any screw is missing when assembling.

(5) If you open the BACK COVER, you will see a Panel Gas Exhaust Tube (refer to FIG<10>). If this

part is damaged, entire PDP PANEL must be replaced. Therefore, when working, be careful not to

damage this part.

(6) A PDP Set contains different kind of connector cables. When connecting or disconnecting connector

cables, check the direction and position of the cable beforehand.

(7) When disconnecting connectors, unplug the connectors slowly with care. Especially when

connecting/disconnecting FFC (film) cables or FPC cables, do not unplug the connectors too much

instantaneously or strongly, and always handle the cables with care. (Refer to FIG<10>, FIG<11>)

(8) Connectors are designed so that if the number of pins or the direction does not match, connectors will

not fit. When having problem in plugging the connectors, make sure to check their kind, position,

and direction.

2. Product Specification

-6-

I T E M S P E C I F I C A T I O N REMARK

1. GENERAL

1-1. MODEL NO DSP-4280GM(G, W, S)

1-2. CHASSIS NO SP-115

1-3. SCREEN SIZE 42 (16:9)

1-4. COUNTRY WORLD WIDE

1-5. RESOLUTION 853(H) X 480(V)

1-6. REMOCON TYPE R-V28A (E)

1-7. SAFETY STANDARD UL, C-UL, CE, CB, FCC(CLASS B), CE(CLASS B), K-mark

2. MECHANICAL

2-1. APPEARANCE

1) WITHOUT STAND WxHxD=1,039 x 628 x 80 mm

2) WITH STAND WxHxD=1,039 x 725 x 320 mm

3) CARTON BOX WxHxD=1,256 x 800 x 327 mm

2-2. WEIGHT

1) WITHOUT STAND 29.9 Kg

2) WITH STAND 36.8 Kg

3. ELECTRICAL

3-1. VIDEO INPUT COMPOSITE(NTSC, PAL, SECAM, PAL-M/N, NTSC4.43)

& S-VHS(50/60Hz Y/C) 2 sets

3-2. DTV/DVD INPUT 1080 i, 720P, 480P , 480i

(Y, Pb/Cb, Pr/Cr COMPONENT SIGNAL) 2 sets

3-3. PC INPUT VGA ~ UXGA (15 PIN D-SUB) 1 sets

3-4. SOUND INPUT 2 sets for VIDEO, 2 sets for DTV/DVD, 1 set for PC

3-4. SPEAKER OUTPUT 8W(R) + 8W(L)

3-5. POWER REQUIREMENT AC 100V~240V, 50/60Hz

3-6. POWER CONSUMPTION 320W

3-8. RS-232 CONTROL RS-232 Communication (for SOFTWARE UPGRADE)

3-9. FUNCTION

1) SCALING PC: H/V SIZE and POSITION Adjusting

VIDEO/DTV/DVD : NOMAL, 16:9, PANORAMA, ENLARGE

LB, ENLARGE LBS

2) ZOOM 20 Scale ZOOMING & PANING

3) OSD Support 11 Languages

4) OTHERS STILL, SLEEP MODE, SOUND MODE

2-1. PRODUCT SPECIFICATION

Product Specification

-7-

I T E M S P E C I F I C A T I O N REMARK

4. OPTICAL

4-1. SCREEN SIZE 42 (106Cm) DIAGONAL

4-2. ASPECT RATIO 16:9

4-3. NUMBER OF PIXELS 853(H)X480(V)

4-4. DISPLAY COLOR 16.77 Million Colors ( 8BIT per each R,G,B)

4-5. PIXEL PITCH 1.08(H)X1.08(V)

4-6. PEAK LUMINANCE 300cd/ (WITH FILTER GLASS)

4-7. CONTRAST RATIO 3000:1

4-8. VIEWING ANGLE Over 160 degree ( VERTICAL / HORIZONTAL)

5. USERCONTROL & ACCESSORIES

5-1 CONTROL BUTTON(SET) AC POWER BUTTON(PUSH-PULL S/W)

MENU, SELECT, UP, DOWN, LEFT, RIGHT(SOFT S/W)

5-2. REMOTE CONTROL(R-V28) POWER, INPUT SELECT, DISPLAY, ZOOM-,ZOOM+,

MENU, UP, DOWN, VOLUME, FREEZE, SCREEN MODE,

SOUND MODE, SLEEP

5-3. ACCESSORIES REMOCON CONTROLLER, BATTERY,

INSTRUCTION MANUAL, A/V CABLE,

STAND, WALL HANGER, SPEAKER R/L

Product Specification

-8-

Resolution H Freq. (KHz) V Freq. (Hz) Remark Patt No.

640x350 31.469 70.1 IBM 203

37.861 85.1 VESA 11

640x400 24.823 56.4 NEC 15

30.48 60.0 PGA 871

31.469 70.1 IBM (DOS) 204

37.861 85.1 VESA 16

640x480 31.469 59.9 DOS 17

35 66.7 Macintosh 18

37.861 72.8 VESA 19

37.5 75.0 VESA 20

39.375 75.0 IBM 21

43.269 85.0 VESA 22

720x400 31.47 60.0 VGA 876

31.469 70.1 IBM 13

37.927 85.1 VESA 14

720X480 31.54 60.0 480P 953

720X576 15.63 25.0 PAL 950

800x600 35.156 56.3 VESA 23

35.16 57.2 VESA 24

37.879 60.3 VESA 24

48.077 72.2 VESA 25

46.875 75.0 VESA 26

53.674 85.1 VESA 27

832x624 49.726 74.0 Macintosh 28

1024x768 48.193(48.077) 59.3(59.8) Macintosh(OAK) 29

48.363 60.0 VESA 30

53.95 66.1 XGA 890

56.476 70.1 HP&VESA 31

60.241 74.9(74.6) Macintosh 32

60.023 75.0 VESA 33

68.677 85.0 VESA 34

80.66 100.0 Fujitsu 939

70.84 84.0 SUN 926

1152X864 54 60.0 VAX 936

63.851 70.0 VESA 35

67.5 75.0 VESA 36

77.094 85.0 VESA 37

1152x900 61.796 66.0 SUN 38

71.713 76.0 SUN 39

1280X720 45 60.0 720P 954

1280X960 60 60.0 VESA 40

75 75.0 VESA 41

85.938 85.0 VESA 42

2-2. Available Input Signal

(1) PC

-9-

Product Specification

Resolution H Freq. (KHz) V Freq. (Hz) Remark Patt No.

1280X1024 46.433 43.4 VESA 205

63.981 60.0 VESA 44

70.66 66.5 VAX 937

74.88 70.0 NEC 921

78.125 72.0 HP & HITA 206

78.855 74.1 Sony & NEC 46

79.976 75.0 VESA 47

81.13 76.1 SUN 927

91.146 85.0 VESA 48

1600X1200 62.5 48.0 VESA

75 60.0 VESA 50

81.25 65.0 VESA 862

87.5 70.0 VESA 863

93.75 75.0 VESA 864

100 80.0 VESA 865

(2) DTV

-1080i/ 60 Hz

-720P / 60 Hz

-480P / 60 Hz

(3) VIDEO

-PAL, PAL-M, PAL-N

-NTSC , NTSC4.43

- SECAM

-10-

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