Daewoo SP-120 Service Manual
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42” PLASMA PDP MONITOR CHASSIS : SP-120
MODEL : PDS4250
NOV.2003
Contents
I. Parts with the exception of MODULE
1.Safety Precautions
3
2.Product Specification
2-1. SPECIFICATION 
4
2-2. Available Input Signal 
6
3.BLOCK DIAGRAM 
8
4.Description Of Each BLOCK
4-1. A/V BLOCK 
9 4-1-1. A/V BLOCK DIAGRAM 
9 4-1-2. VIDEO PCB 
10 4-1-3. JACK PCB 
14 4-1-4. KEY PCB 
15 4-1-5. LED PCB 
15
4-2. POWER PCB 
16 4-3. BASIC CONGIFURATION 
17
5. SERVICE MODE
5-1. Entering SERVICE MODE 
18 5-2. Default Values For SERVICE MODE Items 
18 5-3. Description Of SERVICE MODE Items 
19
6. Adjusting Method
6-1. Adjusting WHITE BALANCE 
23
6-2. Adjusting POWER PCB 
23
7.SOFTWARE UPGRADE Method 
25
8.Main PCB Trouble Diagnosis 
28 8-1. VIDEO & JACK PCB Trouble Diagnosis 
28 8-2. POWER PCB Trouble Diagnosis 
33
9.TROUBLE SHOOTING
9-1. Facts You Must Know When Diagnosing And Repairing 
34 9-2. Representative Symptoms When Each PCB Breaks Down 
34 9-3. Trouble Diagnosis And Repairing Method For Representative Symptoms 
35
10.ASSEMBLY LIST 
39
11.EXPLODED VIEW 
42
II. Parts of MODULE
1.Safety Precautions 
43
2.Formation and Specification of Module 
46
3.Adjustment 
47
4.Trouble Shooting 
52
4-1 Checking for No Picture 
52
4-2 Hitch Diagnosis Following Display Condition |
54 |
-1-
4-2-1. 4/7 or 3/7 of the screen doesn’t be shown |
54 |
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4-2-2. Screen doesn’t be shown as Data COF |
54 |
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4-2-3. It is generated unusual pattern of Data COF IC unit |
55 |
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4-2-4. Regular Stripe is generated about the quantity of one Data COF IC or more |
56 |
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4-2-5. Screen doesn’t be shown at all as scan COF |
56 |
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4-2-6. |
Regular stripe is generated at regular internal on the whole screen |
57 |
4-2-7. |
Data copy is generated to stripe direction |
57 |
4-2-8. |
One or more stripe is generated on the screen |
58 |
4-2-9. |
One or more horizontal line is generated on screen |
58 |
4-2-10. Lightness of screen is wholly darken though there is input-signal-pattern |
58 |
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4-2-11. Different color is shown partially during full-white-screen or electric discharge is |
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generated during full-black-screen |
59 |
4-2-12. Full-white pattern it happened that the lightness of middle is darken while full-white |
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pattern |
59 |
4-2-13. Some lightness of some color doesn’t not generated well |
59 |
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5. Block Diagram of Module |
60 |
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-2-
I. Parts with the exception of MODULE
1. Safety Precautions
1. Safety Precautions
(1)When moving or laying down a PDP Set, at least two people must work. 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 condition of the broken Set, 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 (Fig. 1). If this part is damaged, entire PDP PANEL must be replaced. Therefore, when working, be careful not to damage this part.
Fig 1. Panel Gas Exhaust Tube
(6)A PDP Set contains a 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.
(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.
-3-
2. Product Specification
2-1. SPECIFICATION
I T E M |
S P E C I F I C A T I O N |
REMARK |
1. GENERAL |
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1-1. MODEL NO |
DSP-4222LVS(G, W) |
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1-2. CHASSIS NO |
SP-120 |
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1-3. SCREEN SIZE |
42 (16:9) |
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1-4. COUNTRY |
Europe |
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1-5. RESOLUTION |
852(H) X 480(V) |
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1-6. REMOCON TYPE |
R-V2A02 |
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1-7. SAFETY STANDARD |
CE(CLASS B), CB |
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2. MECHANICAL |
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2-1. APPEARANCE |
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1) WITHOUT STAND |
WxHxD=1,044 x 631 x 82.8 mm |
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2) WITH STAND |
WxHxD=1,044 x 705.9 x 310 mm |
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3) CARTON BOX |
WxHxD=1,256 x 800 x 327 mm |
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2-2. WEIGHT |
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1) WITHOUT STAND |
28.2 Kg |
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2) WITH STAND |
32.7 Kg |
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3. ELECTRICAL |
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3-1. VIDEO INPUT |
COMPOSITE (NTSC, PAL, SECAM, PAL-M/N, NTSC4.43) |
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& S-VHS (50/60Hz Y/C) 1 PORTS SCART(CVBS/RGB) 2 PORTS |
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3-2. DTV/DVD INPUT |
1080i, 720P, 480P , 480i |
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(Y, Pb/Cb, Pr/Cr, COMPONENT SIGNAL) 2 PORTS |
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3-3. PC INPUT |
VGA ~ UXGA (15 PIN D-SUB) 1 PORT |
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3-4. DVI INPUT |
DVI-D(DVI JACK) 1 PORT |
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3-5. SOUND INPUT |
VIDEO 3 PORTS, DTV/DVD 2 PORTS,PC 1 PORT,DVI 1 PORT |
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3-6. SPEAKER OUTPUT |
8W(R) + 8W(L) |
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3-7. POWER REQUIREMENT |
AC 100V~240V, 50/60Hz |
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3-8. POWER CONSUMPTION |
320W |
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3-9. RS-232 CONTROL |
COMMUNICATION (EXTERNAL UPGRADE) |
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3-10. FUNCTION |
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1) SCREEN MODE |
*PC: H/V SIZE AND POSITION ADJUSTMENT |
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*VIDEO : AUTO,16:9,PANORAMA,ENLARGE LB, ENLARGE LBS |
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*DTV/DVD : AUTO,16:9 |
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2) ZOOM |
20 STEP ZOOM |
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3) OSD |
11 LANGUAGES (ENGLISH,KOREAN,GERMAN,ITALIAN, |
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DUTCH,PORTUGUESE,SPANISH,MEXICAN,RUSSIAN, |
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CHINESE,FRANCH) |
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4) OTHERS |
STILL, SLEEP MODE , SOUND MODE |
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-4-
Product Specification
I T E M |
S P E C I F I C A T I O N |
REMARK |
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4. OPTICAL |
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4-1. SCREEN SIZE |
42 (106Cm) DIAGONAL |
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4-2. ASPECT RATIO |
16:9 |
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4-3. NUMBER OF PIXELS |
852(H)X480(V) |
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4-4. DISPLAY COLOR |
16,700,000 COLOR( EACH 8BITS FOR RGB ) |
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4-5. CELL PITCH |
1.08(H)X1.08(V) |
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4-6. PEAK LUMINANCE |
300cd/ (WITH FILTER GLASS) |
MIK7253 |
4-7. CONTRAST RATIO |
1000:1 |
(NO.8) |
4-8. VIEWING ANGLE |
160(VERTICAL/HORIZONTAL) |
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5. USERCONTROL & ACCESSORIES |
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5-1 CONTROL BUTTON(SET) |
AC POWER BUTTON(PUSH-PULL S/W) |
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MENU, SELECT, UP, DOWN, LEFT, RIGHT(SOFT S/W) |
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5-2. REMOTE CONTROL |
POWER, INPUT SELECT, CONFIRM (or OK), |
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( R-V2A02 ) |
EXTENSION -, EXTENSION +, MENU, UP, DOWN, |
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VOLUME UP, VOLUME DOWN, SILENCE, PICTURE |
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MODE, PICTURE STILL, PICTURE SIZE, SOUND |
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MODE, TIMER SLEEP |
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5-3. ACCESSORIES |
REMOTE CONTROLLER,BATTERY,INSTRUCTION MANUAL, |
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A/V CABLE, PC CABLE, POWER CORD |
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OPTION : STAND WALL HANGER, SPEAKER R/L |
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-5-
Product Specification
2-2. Available Input Signal
(1) PC
Resolution |
H Freq. (KHz) |
V Freq. (Hz) |
Remark |
Patt No. |
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640x350 |
31.469 |
70.1 |
IBM |
203 |
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37.861 |
85.1 |
VESA |
11 |
640x400 |
24.823 |
56.4 |
NEC |
15 |
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30.48 |
60.0 |
PGA |
871 |
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31.469 |
70.1 |
IBM (DOS) |
204 |
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37.861 |
85.1 |
VESA |
16 |
640x480 |
31.469 |
59.9 |
DOS |
17 |
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35 |
66.7 |
Macintosh |
18 |
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37.861 |
72.8 |
VESA |
19 |
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37.5 |
75.0 |
VESA |
20 |
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39.375 |
75.0 |
IBM |
21 |
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43.269 |
85.0 |
VESA |
22 |
720x400 |
31.47 |
60.0 |
VGA |
876 |
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31.469 |
70.1 |
IBM |
13 |
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37.927 |
85.1 |
VESA |
14 |
720X480 |
31.54 |
60.0 |
480P |
953 |
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720X576 |
15.63 |
25.0 |
PAL |
950 |
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800x600 |
35.156 |
56.3 |
VESA |
23 |
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35.16 |
57.2 |
VESA |
24 |
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37.879 |
60.3 |
VESA |
24 |
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48.077 |
72.2 |
VESA |
25 |
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46.875 |
75.0 |
VESA |
26 |
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53.674 |
85.1 |
VESA |
27 |
832x624 |
49.726 |
74.0 |
Macintosh |
28 |
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1024x768 |
48.193(48.077) |
59.3(59.8) |
Macintosh(OAK) |
29 |
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48.363 |
60.0 |
VESA |
30 |
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53.95 |
66.1 |
XGA |
890 |
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56.476 |
70.1 |
HP&VESA |
31 |
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60.241 |
74.9(74.6) |
Macintosh |
32 |
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60.023 |
75.0 |
VESA |
33 |
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68.677 |
85.0 |
VESA |
34 |
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80.66 |
100.0 |
Fujitsu |
939 |
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70.84 |
84.0 |
SUN |
926 |
1152X864 |
54 |
60.0 |
VAX |
936 |
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63.851 |
70.0 |
VESA |
35 |
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67.5 |
75.0 |
VESA |
36 |
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77.094 |
85.0 |
VESA |
37 |
1152x900 |
61.796 |
66.0 |
SUN |
38 |
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71.713 |
76.0 |
SUN |
39 |
1280X720 |
45 |
60.0 |
720P |
954 |
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1280X960 |
60 |
60.0 |
VESA |
40 |
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75 |
75.0 |
VESA |
41 |
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85.938 |
85.0 |
VESA |
42 |
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-6-
Product Specification
Resolution |
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H Freq. (KHz) |
V Freq. (Hz) |
Remark |
Patt No. |
1280X1024 |
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46.433 |
43.4 |
VESA |
205 |
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63.981 |
60.0 |
VESA |
44 |
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70.66 |
66.5 |
VAX |
937 |
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74.88 |
70.0 |
NEC |
921 |
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78.125 |
72.0 |
HP & HITA |
206 |
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78.855 |
74.1 |
Sony & NEC |
46 |
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79.976 |
75.0 |
VESA |
47 |
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81.13 |
76.1 |
SUN |
927 |
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91.146 |
85.0 |
VESA |
48 |
1600X1200 |
62.5 |
48.0 |
VESA |
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75 |
60.0 |
VESA |
50 |
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81.25 |
65.0 |
VESA |
862 |
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87.5 |
70.0 |
VESA |
863 |
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93.75 |
75.0 |
VESA |
864 |
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100 |
80.0 |
VESA |
865 |
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(2) DTV
-1080i/ 60 Hz
-720P / 60 Hz
-480P / 60 Hz
(3) VIDEO
-PAL, PAL-M, PAL-N -NTSC , NTSC4.43
- SECAM
-7-
3. BLOCK DIAGRAM
-8-
4. Description Of Each BLOCK
4-1. A/V BLOCK
4-1-1. A/V BLOCK DIAGRAM
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8 |
7 |
6 |
5 |
4 |
3 |
2 |
1 |
5 |
4 |
3 |
2 |
1 |
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GND |
E33V |
GND |
DATA2 |
DATA1 |
COLUM3 |
COLUM2 |
COLUM1 |
STB5V |
GND |
P LED |
IR |
GND |
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P601 |
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P602 |
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P603 |
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1 |
RA1- |
GND |
DEN |
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2 |
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RA1+ |
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RB1- |
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RB+ |
S_RESET |
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GND |
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VVS |
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RC- |
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RC+ |
V_MUTE |
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RCLK1- |
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IC600 |
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IC406 |
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RCLK1+ |
DVS |
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RD1+ |
RD1- |
DHS |
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PW171 |
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DPTV-MVS |
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VHS |
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GND |
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RD2- |
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RA2- |
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RA2+ |
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to |
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RB2+ |
RB2- |
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RC2- |
GND |
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VPEN1 |
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DIGITAL |
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RCLK2- |
RC2+ |
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VPEN |
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RD2- |
RCLK2+ |
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GND |
RD2+ |
GBLKSLP |
GPEN |
GSOG |
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SDATA |
DISPEN |
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39 |
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SLE |
SCLK |
GHSFOUT |
GCOAST GREF |
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DECOE |
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40 |
GND |
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PA5 |
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DCLKB |
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IC401 |
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SAA7118 |
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5 |
STB5V |
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4 |
GND |
GCLK |
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IC500 |
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3 |
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CCOMB |
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to PWR |
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CXA3516 |
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2 |
POWER_CLT |
GHS |
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YCOMB |
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1 |
LED_P |
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PA4 |
GVS |
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IC400 |
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10 |
STB5V |
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u64083 |
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9 |
LED_P |
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8 |
GND |
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7 |
GND |
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VIN |
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6 |
P5V |
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RPC GND G/Y DTV |
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Y DVD |
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5 |
GND |
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VPC |
HPC |
GND BPC GND |
GPC |
GND |
GND B/PB GND R/PR GND |
GND |
CB GND |
CR GND |
CO |
GND |
YO GND |
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to PWR |
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4 |
GND |
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S MUTE |
MSP RST |
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3 |
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G SC |
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GND FB SC |
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P12V |
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P12V |
P12V |
GND GND SEL1 |
SEL2 |
SEL3 GND SCL SDA |
GND TXD RXD GND R SC |
GND |
GND B SC |
GND VIN |
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P12V |
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P502 |
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1 |
NUL |
1 |
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JACK |
26 |
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PA6 |
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PCB |
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PA502 |
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R_OUT |
RIGHT |
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LEFT |
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L_OUT |
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IC706 |
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IC704 |
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IC700 |
IC702 |
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IC701 |
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TDA7480 |
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CXA2151 |
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CXA2069 |
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MSP3420 |
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KEY PCB |
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PA601 |
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6 |
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LED |
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PA602 |
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-9- |
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Description Of Each BLOCK
4-1-2.VIDEO PCB
- PROCESS Various Signal (PC, COMPONENT, COMPOSITE ) to produce 24BIT DIGITAL output
(1)IC and TP
(1)IC400(UPD64083)
-Using 3D COMBFILTER to separate COMPOSITE signal to Brightness Signal(Y) and Color Signal(C)
*TP ( Input : COLOR BAR PATTERN )
A. YCOMP : Brightness Signal(Y)
B. CCOMP : Color Signal (C)
(2) IC401 (SAA7118E)
-Receive NTSC, SECAM, PAL VIDEO by COMPOSITE(V) , S-VHS(Y.C) COMPONENT (Y Cb Cr) and process signal
*TP
A. DECOE : CHIP ENABLE part. When signal process is done by IC401, DC 3.3V is measured.
-10-
Description Of Each BLOCK
(3) IC406(DPTV-MVS)
-A Scan Rate Converter which converts Interlace signal into Progressive signal
*TP
A. VVS : VERTICAL SYNC (output of DPTV-MVS)
B. VHS : HORIZONTAL SYNC (output of DPTV-MVS)
C. VCLK : CLOCK (output of DPTV-MVS)
-11-
Description Of Each BLOCK
(4) IC500(CXA3516R)
-3-channel 8-bit 165MSPS A/D converter which process PC , DTV signal
* TP
A. GCOAST : COAST CONTOL Signal for PLL (input of CXA3516)
B .GHS : HORIZONTAL SYNC for GRAPHIC (output of CXA3516)
C. GCLK : CLOCK for GRAPHIC (output of CXA3516)
-12-
Description Of Each BLOCK
D. GFBK : SYNC for PLL
(5)IC600(PW171)
-Image processor IC
*TP
A. DEN : DATA ENABLE (output of PW171)
B. DHS : HORIZONTAL SYNC (output of PW171)
-13-
Description Of Each BLOCK
C.DVS : VERTICAL SYNC for DISPLAY (output of PW171)
D. DCLKB : CLOCK for DISPLAY (output of PW171)
4-1-3. JACK PCB
- Separate and process various VIDEO and AUDIO signal
(1)IC706 (VIDEO /SYNC SELECTOR)
-This chooses Y Cb/Pb Cr/Pr or RGB signal to output Y Cb/Pb Cr/Pr, to separate SYNC, and to perform SYNC COUNTER.
(2)IC704 (AUDIO/VIDEO SWITCH)
-The IC perform AUDIO or VIDEO SWITCHING
(3)IC715 (DIGITAL CONTROLLER)
-DVI CONTROLLER
(4)IC721 (INPUT SELECTOR SWITCH)
-SCART (RGB) SELECTOR SWITCH
(5)IC700 (MULTI STANDARD SOUND PROCDSSOR)
-AUDIO SINGNAL VOLUME control, EQUALIZER control
-14-
Description Of Each BLOCK
*TP
R_OUT(L_OUT) : AUDIO SIGNAL that goes into MSP3420 before AUDIO PROCESSING
(4) IC701 .IC700 (TDA 7480) *TP
A. RIGHT(LEFT) :AMP input signal before 30dB amplification
4-1-4.KEY PCB
-Input PCB using KEY 4-1-5.LED PCB
-PCB for REMOCON CONTROL
-15-
Description Of Each BLOCK
4-2. POWER PCB
<Input requirements>
Nominal Input Voltage : AC100V to AC240V (Variation Range - AC85V to AC276V)
Single-Phase full wave
Regulation Method : Transistor Switching Method
Input Frequency : 50~60Hz (Variation range 45Hz to 66Hz)
Inrush Current : 50A zero-peak max at AC264V 
Output Voltage is as follows.
No. |
Output |
Nominal |
Variable |
Voltage |
Nominal |
Load current |
Ripple/Noise |
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Name |
Voltage |
range |
accuracy |
current |
range |
(mVp-p)*2 |
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(V) |
(V) |
*1 |
(A) |
(A) |
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1 |
Vsus |
190 |
180-195 |
5V |
1.3 |
0.1~1.3 |
1000/500 |
2 |
Vadd |
60 |
50-80 |
2V |
1 |
0.1~1 |
250/500 |
3 |
V1 |
5.1 |
- |
5% |
2.5 |
0.1~3 |
50/100 |
4 |
V3 |
17 |
- |
5% |
1 |
0~1 |
50/100 |
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(SOUND) |
-17 |
- |
5% |
1 |
0~1 |
50/100 |
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5 |
V4 |
5.0 |
- |
5% |
1.5 |
0.1~1.5 |
50/100 |
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6 |
V5 |
12 |
- |
5% |
0.6 |
0~1 |
50/100 |
7 |
Vstb |
5 |
- |
5% |
1.5 |
0~1.5 |
100/100 |
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Connector
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Connector number |
P2 |
P3 |
P6 |
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Model name |
GP390-10P-TS |
1-1123723-8 |
GP390-04P-TS |
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Maker |
LG Cable |
AMP |
LG Cable |
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The number of pins |
10 |
8 |
4 |
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1 |
Vsus 190V |
Vsus 190V |
G |
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2 |
Vsus 190V |
Vsus 190V |
G |
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3 |
Vsus 190V |
NC |
V1 5.1V |
Pin |
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4 |
NC |
G |
V1 5.1V |
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5 |
G |
G |
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number |
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6 |
G |
Vadd 60V |
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7 |
G |
G |
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8 |
G |
V1 5.1V |
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9 |
NC |
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10 |
NC |
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-16-
Description Of Each BLOCK
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Connector number |
P4 |
P5 |
P7 |
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Model name |
YMW025-10R |
YMW025-05R |
YMW025-04R |
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Maker |
YEONHO |
YEONHO |
YEONHO |
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The number of pins |
10 |
5 |
4 |
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1 |
NC |
POWER (ON/OFF) |
V3 -17V |
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2 |
NC |
NC |
G |
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3 |
V5 12V |
NC |
G |
Pin |
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4 |
G |
G |
V3 17V |
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5 |
G |
Vstb |
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number |
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6 |
V4 5V |
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7 |
G |
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8 |
G |
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9 |
NC |
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10 |
NC |
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*P2 is connected to P5 of Y-SUS PCB. P3 is connected to P1 of Z-SUS PCB. P6 is connected to P6 of Y-SUS PCB.
P4 is connected to PA4 of VIDEO PCB.
P5 is connected to PA5 of VIDEO PCB.
P7 is connected to PA6 of JACK PCB.
4-3. Basic Configuration
Applied Voltage level is specified at the time, when full white pattern displayed on panel.
-17-
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