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S/M No. : DSP115BEF0
Service Manual
42" PLASMA PDP MONITOR
CHASSIS : SP-115
DAEWOO ELECTRONICS Corp.
http : //svc.dwe.co.kr Nov. 2002
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
(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.
-5-
2. Product Specification
2-1. PRODUCT SPECIFICATION
ITEM SPECIFICATION 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
-6-
Product Specification
ITEM SPECIFICATION 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
-7-
Product Specification
2-2. Available Input Signal
(1) PC
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
-8-
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
-9-
-10-
4. Description Of Each BLOCK
4-1. A/V BLOCK
4-1-1. A/V BLOCK DIAGRAM
1
1
6
5
4
3
2
5
4
3
2
GND
DATA2
DATA1
COLUM3
P_LED
GND
COLUM2
COLUM1
GND
S5V
IR
P601 P602
P603
GND STB5V
2 1 G0 NC DEN
G1 NC
G2 NC S_RESET VVS
G3 DVS V_MUTE
G4 DHS
G5 V_MUTE DVS IC600 IC406 VHS
G6 S_RESET DHS PW171 VCLK DPTV-MVS
G7 NC
GND DEN
B0 GND
B1 R0 VPEN1
to B2 R1
VPEN
B3 R2
DIGITAL B4 R3
B5 R4 GBLKSLP GPEN GSOG
B6 R5
B7 R6 DECOE
GHSFOUT
40 39 GND R7 GCOAST GREF
DCLK GND
DCLKB
IC401
PA5 SAA7118
5 STB5V
4 GND GCLK
IC500 CCOMB
3
CXA3516
to PWR 2 PWR_CLT
GHS
YCOMB
1 LED_P
GVS
PA4 IC400
10 STB5V u64083
LED_P
9
8 GND
VIN
7 GND
P5V
G/Y_DTV
6
Y_DVD
R/PR
GND
VPC
RPC
HPC
GND
B/PB
GND
BPC
GPC
ID_JACK GND
GND
GND
GND
GND
GND
GND
GND
CR
5
S_MUTE GND
GND
CB
CO
MSP_RST YO
4 GND
to PWR
DSCL
DSDA
P12V
to PWR
TXD1
3
SEL2
SEL3
RXD1
P12V
P12V
SEL1
GND
GND
GND
GND
GND
GND
SDA
GND
GND
GND
SCL
NC
NC
2 P12V
P502
NUL 1 25
1
26 50
26 50 1 2 3 4
JACK 1 25
PA6
PCB PA502
R_OUT RIGHT
L_OUT LEFT
IC702 IC701
IC706 IC704 IC700 TDA7480 TDA7480
CXA2151 CXA2069 MSP3420
1 2 3 4 5
KEY 1 2 3 4 5 6
PA601
PCB PA602
LED
-11-
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,
output 3.3V DC LEVEL
-12-
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 by DPTV-MVS)
B. VHS : HORIZONTAL SYNC (output by DPTV-MVS)
C. VCLK : CLOCK (output by DPTV-MVS)
-13-
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 by CXA3516)
B .GHS : HORIZONTAL SYNC for GRAPHIC (output by CXA3516)
C. GCLK : CLOCK for GRAPHIC (output by CXA3516)
-14-
Description Of Each BLOCK
D. GFBK : SYNC for PLL
(5) IC600(PW171)
- Image processor IC
*TP
A. DEN : DATA ENABLE (output by PW171)
B. DHS : HORIZONTAL SYNC (output by PW171)
-15-
Description Of Each BLOCK
C.DVS : VERTICAL SYNC for DISPLAY (output by PW171)
D. DCLKB : CLOCK for DISPLAY (output by 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(7_INPUT 3_OUTPUT AUDIO/VIDEO SWITCH)
- The IC perform AUDIO or VIDEO SWITCHING
(3) IC700(MULTI STANDARD SOUND PROCDSSOR)
-AUDIO SINGNAL VOLUME control, EQUALIZER control
-16-
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
-17-
Description Of Each BLOCK
4-2 DRIVING BLOCK
4-2-1. Driving BLOCK DIAGRAM
SCAN
TOP
DATA
Y-SUSTAIN
INPUT TIMING ENERGY X-SUSTAIN
CNOTROL RECOVERY PANEL ENERGY
& SCAN RECOVERY
DATA ERASE
CONTROL SCAN SHELF
INTERFACE WRITING
SIGNAL BOTTOM
Verase Vsus DATA
DRIVER
Vadd
Vdr Vsus
POWER
Vadd
Vstb/Video/etc.
Driving circuit block looks like above diagram. First, within the Digital-board, timing control / data
interface signals input to Y / X / DATA-board. Also, low voltage and high voltage powers such as
15V / 5V / Vsus / Yer / Vadd are supplied. SCAN is divided into two PCB(upper and lower) and
DATA driver can drive 7 COF module. Also Connection-board which is located at the lower part of
the panel, is divided into two PCB. It transfer 5V / Vadd power supply as well as various Y / X /
DATA-board. Vadd power supply is transferred from Power module to X-board through Connection-
board to Data driver.
-18-
Description Of Each BLOCK
4-2-2. Driving Waveform
Y-DRIVING
1 SUB-FIELD
230V
173V BV 173V 166V
GND
-62V Yn
SCAN ERASING
X-DRIVING
173V
158V 163 155V
GND
FULL WRITING X-SHELF SUSTAINING
ADDRESSING
H
Z-DRIVING
68V Zn
L
GND
PDP Driving signal is largely divided into three(Y, X, Z) as shown above. They are outputs of Y-
board, X-board, DATA-board (COF) respectively. Each Sub-field is divided into ADDRESSING,
SUSTAINING, ERASING parts. FULL WRITE pulse from Y-board adds once per frame(~ 16ms).
=
1) FULL WRITING
It is a process that in order to display new image, every cell s condition must be uniformed to erase
wall charge made by previous discharge and make new wall charge for next address discharge.
Ramp shape signal is added to supply every cell uniform wall charge.
To decrease Background luminescence and improve contrast, it is applied once per frame.
Full Writing signal output by Y-board is Vsus electric potential supplied by power module plus
ramp-shape output signal made by DC-DC Converter(TY1).
2) ADDRESSING
Previous to SUSTAINING, it is procedure to select charging cell for image display.
In other words, it is the stage to make wanted cell to form wall charge.
During this stage, SCAN block operate in Y-board and SHELF block (X_HIGH) in X-board.
-19-
Description Of Each BLOCK
3) SUSTAINING
After the Addressing period, this stage is to add Sustaining pulse to selected cell to make the
SUSTAINING discharge continue.
For each X, Y-board sustain block, opposite-polarity rectangular pulse which have ER_H SUS_H
ER_L SUS_L order, is distributed to Panel s X,Y electrode at a constant frequency.
4) ERASING
Removing operation for Electrical discharge inside each cell to address new data in next Sub-field.
It is a Ramp output signal similar to Full Writing signal.
Ramp-down block operates in Y-board and Shelf block (X_N_SHELF) operates in X-board.
-20-
Description Of Each BLOCK
4-2-3. DIGITAL PCB
ID1 ID2
1st_chip(A500K180) 2nd_chip(A500K270)
ID3 & ID4
RGB DATA [0:3] Inverse Gamma
Weight SDRAM
& PISO
Conversion (64M x 2)
Dithering
SDRAM
APL Controller
Detection
PDP Driving
Timing Controller
Data Interface
ROM
Controller
X Driver Control Signal
Y Driver Control Signal
Z Driver Control Signal
Z Driver Data Signal
ROM : Data Flow
(M27C1024) : Control Address Flow
: ROM Data Flow
ID33
1. Digital PCB s Main Part
(1)Actel FPGA A500K180-PQ208 : 1 EA
- Location No. : ID1
- Power : Internal 2.5V, I/O 3.3V
- Package : PQFP 208
- Typical Gates : 150,000
- User I/O : 164
(2)Actel FPGA A500K270-BG456 : 1 EA
- Location No. : ID2
- Power : Internal 2.5V, I/O 3.3V
- Package : BGA 456
- Typical Gates : 215,000
- User I/O : 362
(3)SDRAM( K4S643232E-TC70 86pin TSOP ) : 2 EA
- Location No. : ID3~4
- Power : 3.3V
- Size : 64 M ( 512K * 32 bit * 4 Banks )
-21-
Description Of Each BLOCK
(4)50MHz Clock Oscillator : 1 EA
- Location No. : XD1
- Power : 3.3V
(5)Buffer IC( 74LCX541 ) : 17 EA
- Location No. : ID9~25
- Power : 5V
- Input Voltage : 3.3V
- Output Voltage : 5V
(6)Buffer IC( 74LCX541 ) : 4 EA
- Location No. : ID5~8
- Power : 3.3V
- Input/Output Voltage : 3.3V
(7)EPROM( M27C1024-PLCC44 ) : 1 EA
- Location No. : ID33
- Power : 5V
- Input Voltage : 3.3V
- Output Voltage : 5V
(8)2.5V Regulator( LP3964EMP-2.5 )
- Location No. : ID32
- Input Voltage : 5V
- Output Voltage : 2.5V
(9)EMI Reduction IC ( P2040 )
- Location No. : ID34
- Power : 3.3V
2. Data Flow
(1)Input from Video PCB
- 8bit Data per each R,G,B ( synchronized by DCLK)
- DVS, DHS, DEN, S_RESET, V_MUTE, DCLK(33.5 MHz)
(2)Inverse Gamma & Dithering Block
- After mapping input data according to Reverse Gamma Correction Table , execute
Dithering Process .
(3)Weight Conversion Block
- Map input data according to Weight Conversion Table , which is based on optimum PDP
Driving Weight Pattern.
-22-
Description Of Each BLOCK
(4)ROM & ROM Controller Block
- ROM contains Reverse Gamma Correction Table , Weight Conversion Table , APL
Table and so on. Rom Controller Block generate Address & Control signal for receiving
these data from ROM
(5)PISO(Parallel Input Serial Output) Block
- Load 10 pixels per each R,G,B data with parallel type and shift them with serial type in order
of Weight ( LSB first ). These shifted data is stored in Internal Memory of A500K270(ID2)
with based on DCLK(33.5MHz). After that, those data go into External Frame Memory
(SDRAM) in order of Weight with based on CLK50M. In other words, PISO Block execute
three steps Data Load Data Shift & Internal Memory Write Internal Memory Read &
External SDRAM Write successively. To process with real time, there are three PISO
Blocks.
(6)SDRAM & SDRAM Control Block
- Generate Address/Control signals for SDRAM. There are 2 SDRAMs (64M 32-bit SDRAM),
which store 1 Frame s R,G,B data in order of Weight respectively to process with real time.
(7)Data Interface Block
- R,G,B data ouput from SDRAM is stored by line in Data Interface Block. These data is output
in order matched by Data Driver IC(Z Driver IC) s input sequence. Our PDP has 853 Data
Lines per each R,G,B, and need 853*3=2559 bit s storage. To process with real time,
actually need 2559*2=5118 bit s storage.
3. PDP Driving Timing Control
(1)X-SUS Driving Control Signal Block
- Generate Control Signals to drive X-SUS PCB. There are 6 Control Signals as follows.
- X_SUSH, X_SUSL, X_ERH, X_ERL, X_HIGH, X_NSHELF
(2)Y-SUS Drving Control Signal Block
- Generate Control Signals to drive Y-SUS PCB & Scan Drvier IC. There are 12 Control Signals
as follows.
- Y_SUSH, Y_SUSL, Y_ERH, Y_ERL, Y_SC20_2, Y_SC20_3, Y_SC21_7, Y_SC21_9,
Y_BLK, Y_CLK, Y_SI1, Y_SI2
(3)Z Driving Control Signal Block
- Generate Control Signals to drive DATA COF (Z Driver IC). There are 8 Control Signals as
follows.
- Z1_CLK1, Z1_CLK2, Z2_CLK1, Z2_CLK2, Z1_BLK, Z1_STB, Z2_BLK, Z2_STB
-23-
Description Of Each BLOCK
(4)Sub Control Signal Block
- Generate some Control Signals to control Data Interface Block and SDRAM Control
Block . There are 5 Control Signals as follows.
- F_SUBF, CLK_480, OUT_CLK, F_32SFT, SLCT
(5)APL Detection Block
- Detect the amount of input Data, which is so-called APL (Average Picture Level), and give
APL to Timing Controller Block in order to control Power Consumption of PDP Set.
-24-
Description Of Each BLOCK
4-2-4. X-SUS PCB
1) X_SUSTAIN PCB block diagram
P201A P202A
X X_N_ X X X X
15V GND Vadd GND GND GND GND NC Vsus Vsus NC Vadd GND GND _HIGH SHELF GND GND _ERL _ERH _SUSL _SUSH 5V
11 1 12 1
X_shelf X_sustain
PU1 PU2 PU3 PU4 PU5 PU6
X_ELECTRODES
2) Structure of X_SUSTAIN PCB
X_SUSTAIN BLOCK SUS_H / SUS_L / ER_H / ER_L(Energy Recovery Circuit)
HIC Structured
Vshelf Generating Circuit From Vsus(173V) to X_HIGHT(163V) voltage generating circuit
15V to X_ N_SHELF(5V) voltage generating circuit Control Voltage by Variable Resistor
RU1
LOGIC Circuit that processes various waveform timing signal
-25-
Description Of Each BLOCK
3) Power Supply
Vsus - Supplied by POWER MODULE. Supplies X-SUS as well as generates X-HIGHT
voltage.(173V)
15V - Supplied by POWER MODULE. Supplies FET driving power as well as generates
X_N_SHELF voltage(5V).
5V - Supplied through CONNECTION-board from DIGITAL-board. Used for LOGIC IC Power.
4) Signal
X_SUSTAIN SUS_H / SUS_L / ER_H / ER_L (Supplied from P202A)
X_SHELF X_N_SHELF / X_HIGHT (Supplied from P202A)
5) SUSTAIN BLOCK
LESONANCE COIL
LESONANCE FREQUENCY
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Description Of Each BLOCK
4-2-5. Y-SUS & SCAN PCB
1) Y_SUSTAIN PCB block diagram
P101A P103A P102A
Y_ V V Y_ Y_ Y_ Y_
15V GND GND NC ERASE _SUS _SUS GND GND 5V GND GND ERL ERH SUSL SUSH GND
7 1 11 1
Y_erase Y_scan Scan Scan IY8/IY27
(PY1,4) (PY1) _Vcc
Remp Scan Scan Remp
_up (PY1,4) _down
&s/w (PY4)
&s/w
shelf
15V_Y2
15V_Y2
Y DC-DC Y
_ramp_ Y_ramp _ramp Y_sustain
down _up _up
5V_Y2
Ramp_down Ramp_up
Y_erase
S/W S/W
15V_Y2 5V_Y2
DC-DC
Y_shelf
Y_shelf
15V_Y3
15V_Y2 5V_Y2
DC-DC
Y_scan
Y_scan
5V_Y3 5V_Y3
PY1 PY2 PY3 PY4
SCAN-BOARD
Y_ELECTRODES
-27-
Description Of Each BLOCK
2) Y_SUSTAIN PCB Structure
SUSTAIN BLOCK SUS_H / SUS_L / ER_H / ER_L (Energy Recovery Circuit)
Structured with HIC
RAMP_UP , RAMP_DOWN waveform generating circuit
RAMP_UP_S/W , RAMP_DOWN_S/W
Y_SCAN -62V(based on GND) Applying Circuit
Y_SHELF 70V(based on GND) Applying Circuit
Yer 166V Applying Circuit
RAMP_UP / Y_SCAN_VH / DC-DC converter circuit that generating Y_SCAN_GND s
voltage
LOGIC Circuit that processes various waveform timing signal
3) Power Supply
Vsus - Supplied from POWER MODULE.(173V)
15V - Supplied from POWER MODULE and used for FET s driving power and input powers of 3
DC-DC converter. Also, generates output voltage of each Y-RAMP_UP / Y-SCAN /
Y_SHELF(Y_SCAN_GND).
5V - Supplied from POWER MODULE through DIGITAL-board. Used for LOGIC IC power
supply. Also, power supply of 5V_Y2, 5V_Y3 is supplied through 7805 regulator from DC-
DC converter Trans TY2 s output.
Yer - Supplied by POWER MODULE. (166V)
GND - Power supply GND / Y1 / Y2 / Y3
4) Signal
Y_SUSTAIN SUS_H / SUS_L / ER_H / ER_L(supplied by P102A)
Y_ERASE (supplied by P103A)
Y_SCAN (supplied by P103A)
Y_RAMP_DOWN & S/W (supplied by P103A)
Y_RAMP_UP & S/W (supplied by P103A)
SCAN CLK / SI1 / SI2 / BLK (supplied by P103A)
-28-
Description Of Each BLOCK
4-2-6. CONNECTION PCB & DATA COF
1) Structure of CONNECTION PCB
Divided into 2 PCBs (CONN-LEFT & CONN-RIGHT)
CONN-LEFT From DIGITAL PCB through connector P304, data signal and 5V IC Power
are supplied. Vadd Power is supplied to PC 5~7 through PC08A.
CONN-RIGHT From DIGITAL PCB through connector P304A, data signal and 5V IC
Power are supplied. 5V Power is supplied to X-board through P202. Also, Data signals are
supplied from DIGITAL PCB through P302A and X-sustain/X-shelf signals are supplied from
X-SUS PCB through P202. Vadd Power is supplied to PC 1~4 from X-SUS PCB through P202
and to CONN-LEFT through PC8A1 and PC08A.
2) Structure of DATA COF
7 COF Type module(PC 1~7)
DATA signals are transferred to CONNECTION PCB from DIGITAL PCB through P304A /
P303A / P302A. And through PC 1~7 each are transferred to DATA COF.
5V supplied from DIGITAL PCB through connector P304A / P303A. Vadd flows POWER PCB
X-SUS PCB connector P202 CONNECTION PCB DATA COF.
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Description Of Each BLOCK
4-3. POWER BLOCK
4-3-1. POWER BLOCK DIAGRAM
Main B+
5V out
Line PFC Vlow
Filter 12V out
B+ 15V
30V out
Sequence 15V out
ST- BY Control
5V out
5V Block
3.3V out
IC B+
Vadd
Main B+ Vadd
IC ON/OFF Block
Discharge
IC ON/OFF
Vsus
Main B+ Vsus
IC B+
POWER
ON/OFF Vyer
Control Protectio n
Block
Vyer
ST- BY
If Power is ON , V_PFC and V_LOW BLOCK is working and Voltage generated in V_LOW s
2nd Coil actuates V_ADD. After V_ADD is ON , 2nd Voltage generated in V_ADD BLOCK
acutates V_SUS BLOCK again.
-30-
Description Of Each BLOCK
4-3-2. POWER PCB
Rating : AC100~240 V, Single-Phase
Regulation Method : Transistor & Switching Method
Rating Input Frequency : 50~60Hz, Inrush Current : under 35A.
Output Voltage is as follows.
Voltage(Vdc) Current(Adc)
Rating Variable Allowable Ripple Ripple Noise When
Tolerance OVP Rating OCP
Range overshoot Voltage Voltage Lode
(V) (V) (A) (A)
(V) (V) Voltage(V) (mVp-p) (mVp-p) change
1 Vsus 175 10 200 200 2000 500 1.5 0.1~1.5 Over 3.2
2 Vadd 70 10 90 100 500 300 1 0.1~1 Over 2.0
3 Vyer 160 10 180 500 500 0.1 0~0.15
4 Vdr1 15.5 0.75 18 18 50 100 1 0.1~1 1.4
5 V1 5 0.25 6 50 100 1 0.1~1
6 V2 12 0.6 13.6 50 100 0.6 0~1
7 V3 17 0.75 18 50 100 0.7 0~1
-17 0.75 -18 50 100 0.7 0.1~1
8 V4 5.1 0.55 6.5 50 100 1 0.1~1
9 V5 3.6 0.33 3.66 33 66 1 0~1
10 Vstb 5 0.5 6 50 100 0.5 0~1
* When Protect Circuit operates, all Outputs except Vstb are suspended. But, when
Vstb is abnormal, all Outputs are suspended.
* OVP(Over Voltage Protection), OCP(Over Current Protection)
The above table s Output Voltage output from the following connector.
(based on the Parts Side s silk name of POWER PCB)
Vsus Vsus Vyer NC HG HG Vdr1 NC Vsus Vsus NC HG HG HG HG Vadd HG Vdr1
P2 P1
NC LG
NC LG
VG Vstd V2
VG VG V2
V3
V4 NC NC
P4 P5 P3 SG P6
VG NC LG
SG
VG PR LG
V3
V5 V1
NC V1
NC
-31-
Description Of Each BLOCK
* P2 is connected to Y-SUS PCB s P101A
P1 is connected to X-SUS PCB s P201A
P4 is connected to VIDEO PCB s PA4
P5 is connected to VIDEO PCB s PA5
P3 is connected to DIGITAL PCB s P301A
P6 is connected to JACK PCB s PA6.
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5. SERVICE MODE
5-1. Entering SERVICE MODE
Push Remote controller's "UP" MUTE DISPLAY MUTE BUTTON to enter
SERVICE adjust MODE.
5-2. Default Values fot SERVICE MODE
1) PW171
-SUB-BRIGHTNESS : 28
-SUB-CONTRAST : 40
-R-BIAS : 68
-G-BIAS : 65
-B-BIAS : 70
-R-GAIN : 67
-G-GAIN : 45
-B-GAIN : 78
2) SAA7118
-SUB BRT : 128
-SUB CONT : 50
-SUB CLR : 64
-SUB TNT : 0
-SUB SRP : 10
3) DPTV
-SUB BRT : 59
-SUB CONT : 13
4) CXA3516
-SUB CONT : 58
-Cb OFFSET : 39
-Cr OFFSET : 37
-HYS :3
-THRSLD : 14
-33-
SERVICE MODE
5) MSP34X0
-PRESCALE : 22
5-3. Description of SERVICE MODE Items
1) PW171
(Note) This article is for adjustment after replacement of VIDEO PCB. These Values may vary
from set to set. Therefore if these values are recorded before replacing VIDEO PCB, you do
not need to adjust WHITE BALANCE additionally. The set up can be done using the
recorded values.
(1)SUB BRT : Set up BRIGHT standard value of PW171.
(2) SUB CONT : Set up CONTRST standard value of PW171.
(3) BIAS R : Set up RED BIAS value during WHITE BALANCE
(4) BIAS G : Set up GREEN BIAS value during WHITE BALANCE
(5) BIAS B : Set up BLUE BIAS value during WHITE BALANCE
(6) GAIN R :Set up RED GAIN value during WHITE BALANCE
(7) GAIN G : Set up GREEN GAIN value during WHITE BALANCE
(8) GAIN B : Set up BLUE GAIN value during WHITE BALANCE
2) SAA7118
(Note) This article is not for adjustment after replacement of VIDEO PCB. Therefore do not change
initial values.
(1) SUB BRT : Set up BRIGHT standard value of SAA7118.
(2) SUB CONT : Set up CONTRAST standard value of SAA7118.
(3) SUB CLR : Set up COLOR standard value of SAA7118.
(4) SUB TNT : Set up TINT standard value of SAA7118.
(5) SUB SRP : Set up SHARPNESS standard value of SAA7118.
3) DPTV
(Note) This article is not for adjustment after replacement of VIDEO PCB. Therefore do not
change initial values.
(1) SUB BRT : Set up BRIGHT standard value of DPTV MVS.
(2) SUB CONT : Set up CONTRAST standard value of DPTV MVS.
-34-
SERVICE MODE
4) CXA3516
(Note) This article is not for adjustment after replacement of VIDEO PCB. Therefore do not
change initial values.
(1) SUB CONT : Set up CONTRAST standard value of CXA 3516
(2) Cb OFFSET : Set up BLACK LEVEL of Cb CHANNEL
(3) Cr OFFSET : Set up BLACK LEVEL of Cr CHANNEL
(4) HYS : Set up HYSTERISIS of SYNC
(5) THR SLP : Set up THRESHOLE of PEDESTAL LEVEL
5) MSP34X0
(Note) This article is not for adjustment after replacement of VIDEO PCB. Therefore do not
change initial values.
(1) PRESCLE : Set up AUDIO output signal' s magnitude
6) MISC
(1) TST PTRN AT : Changing TEST PATTERN (RED GREEN BLUE BLACK WHITE )
every minute automatically.
(2) TST PTRN MA : Changing RED GREEN BLUE BLACK WHITE TEST PATTERN
manually using VOLUME UP KEY.
(3) AT PWR : ON - Condition where turning AC power on, automatically turns the SET on.
OFF -Condition where turning AC power on makes the Set STAND BY, and
Remocon' s POWER on turns the set on from STAND BY state.
(4) JACK : Set up depending on JACK BOARD' s input MODE
- MULTI : Used by DSP-4280 series
- MONITOR : Used by DSP-4282 series
- MONITOR+ : Used by DSP-4282 series with DSP-JU20 attached.
(Note) Wront setup causes displaying problem. So you must be careful when SETTING.
(5) PXL SFT
ON - Moving screen up, down left and right by some PIXELs every 20 seconds.
OFF - Fixing PIXEL position. No movement on screen.
(Note) PIXEL SHIFT function is solution to PDP's characteristic phenomenon, so-called "Image
Sticking" problem. Leave this function ON, When displaying many fixed screen like PC
screen. When this function is ON the screen will move a little for every fixed interval but a
human eye can not recognize it well.
7) INFOR
-35-
SERVICE MODE
(1) VER : Displaying Software's VERSION
8) RESET
(1) EDID
(2) LEVEL 1 : RESET SERVICE MODE Condition's All Values.
(3) LEVEL 2 : RESET SERVICE MODE Condition's All Values except PW171 values
(4) FACTORY : RESET to factory shipping initi