S/M No. : DSP115BEF0 Service Manual 42" PLASMA PDP MONITOR CHASSIS : SP-115 DAEWOO ELECTRONICS Corp. http : //svc.dwe.co.kr Nov.
Contents 1.Safety Precaution 2. Product Specification 2-1. SPECIFICATION 2-2. Available Input Signal 3. BLOCK DIAGRAM 4. Description Of Each BLOCK 4-1. A/V BLOCK 4-1-1. A/V BLOCK DIAGRAM 4-1-2. VIDEO PCB 4-1-3. JACK PCB 4-1-4. KEY PCB 4-1-5. LED PCB 4-2. DRIVING BLOCK 4-2-1. DRIVING BLOCK DIAGRAM 4-2-2. DRIVING WAVEFORM 5 6 6 8 10 11 11 11 12 16 17 17 18 18 4-2-3. DIGITAL PCB 4-2-4. X-SUS PCB 4-2-5. Y-SUS & SCAN PCB 4-2-6. CONNECTION PCB & DATA COF 4-3. POWER BLOCK 4-3-1. POWER BLOCK DIAGRAM 4-3-2.
9. Main PCB Trouble Diagnosis 9-1. VIDEO & JACK PCB Trouble Diagnosis 9-2. DIGITAL PCB Trouble Diagnosis FIG<9-1>. DIGITAL PCB LAYOUT 9-3. X-SUS PCB Trouble Diagnosis 9-4. Y-SUS & SCAN PCB Trouble Diagnosis 9-5. CONNECTION PCB & DATA COF Trouble Diagnosis 9-6. POWER PCB Trouble Diagnosis 10. TROUBLE SHOOTING 10-1. Facts You Must Know When Diagnosing And Repairing 10-2. Representative Symptoms When Each PCB Breaks Down 10-3.
FIG <23>. Y-SUS & SCAN PCB DIODE TEST FIG <24>. SCANH PCB DIODE TEST FIG <25>. SCANL PCB DIODE TEST FIG <26>. 5 STEP GRAY SCALE PATTERN 14. Trouble Symptom Picture Trouble Symptom Picture<1>. Trouble Symptom Picture <2>. Trouble Symptom Picture <3>. Trouble Symptom Picture <4>. Trouble Symptom Picture <5>. Trouble Symptom Picture <6>. Trouble Symptom Picture <7>. Trouble Symptom Picture <8>. Trouble Symptom Picture <9>. Trouble Symptom Picture <10>. Trouble Symptom Picture <11>.
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.
2. Product Specification 2-1. PRODUCT SPECIFICATION ITEM 1. GENERAL 1-1. MODEL NO 1-2. CHASSIS NO 1-3. SCREEN SIZE 1-4. COUNTRY 1-5. RESOLUTION 1-6. REMOCON TYPE 1-7. SAFETY STANDARD 2. MECHANICAL 2-1. APPEARANCE 1) WITHOUT STAND 2) WITH STAND 3) CARTON BOX 2-2. WEIGHT 1) WITHOUT STAND 2) WITH STAND 3. ELECTRICAL 3-1. VIDEO INPUT 3-2. DTV/DVD INPUT 3-3. PC INPUT 3-4. SOUND INPUT 3-4. SPEAKER OUTPUT 3-5. POWER REQUIREMENT 3-6. POWER CONSUMPTION 3-8. RS-232 CONTROL 3-9.
Product Specification ITEM 4. OPTICAL 4-1. SCREEN SIZE 4-2. ASPECT RATIO 4-3. NUMBER OF PIXELS 4-4. DISPLAY COLOR 4-5. PIXEL PITCH 4-6. PEAK LUMINANCE 4-7. CONTRAST RATIO 4-8. VIEWING ANGLE 5. USERCONTROL & ACCESSORIES 5-1 CONTROL BUTTON(SET) SPECIFICATION 42 (106Cm) DIAGONAL 16:9 853(H)X480(V) 16.77 Million Colors ( 8BIT per each R,G,B) 1.08(H)X1.
Product Specification 2-2. Available Input Signal (1) PC Resolution 640x350 640x400 640x480 720x400 720X480 720X576 800x600 832x624 1024x768 1152X864 1152x900 1280X720 1280X960 H Freq. (KHz) 31.469 37.861 24.823 30.48 31.469 37.861 31.469 35 37.861 37.5 39.375 43.269 31.47 31.469 37.927 31.54 15.63 35.156 35.16 37.879 48.077 46.875 53.674 49.726 48.193(48.077) 48.363 53.95 56.476 60.241 60.023 68.677 80.66 70.84 54 63.851 67.5 77.094 61.796 71.713 45 60 75 85.938 V Freq. (Hz) 70.1 85.1 56.4 60.
Product Specification Resolution 1280X1024 1600X1200 H Freq. (KHz) 46.433 63.981 70.66 74.88 78.125 78.855 79.976 81.13 91.146 62.5 75 81.25 87.5 93.75 100 V Freq. (Hz) 43.4 60.0 66.5 70.0 72.0 74.1 75.0 76.1 85.0 48.0 60.0 65.0 70.0 75.0 80.0 (2) DTV -1080i/ 60 Hz -720P / 60 Hz -480P / 60 Hz (3) VIDEO -PAL, PAL-M, PAL-N -NTSC , NTSC4.43 - SECAM -9- Remark VESA VESA VAX NEC HP & HITA Sony & NEC VESA SUN VESA VESA VESA VESA VESA VESA VESA Patt No.
-10-
4. Description Of Each BLOCK 4-1. A/V BLOCK 4-1-1.
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.
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.
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.
Description Of Each BLOCK D. GFBK : SYNC for PLL (5) IC600(PW171) - Image processor IC *TP A. DEN : DATA ENABLE (output by PW171) B.
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.
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.
Description Of Each BLOCK 4-2 DRIVING BLOCK 4-2-1. Driving BLOCK DIAGRAM SCAN TOP DATA INPUT CONTROL SIGNAL Y-SUSTAIN ENERGY RECOVERY SCAN ERASE WRITING TIMING CNOTROL & DATA INTERFACE Verase X-SUSTAIN ENERGY RECOVERY SHELF PANEL SCAN BOTTOM DATA DRIVER Vsus 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.
Description Of Each BLOCK 4-2-2. Driving Waveform Y-DRIVING 1 SUB-FIELD 230V 173V BV 173V 166V GND Yn -62V ERASING SCAN X-DRIVING 173V 163 158V 155V GND H Z-DRIVING 68V GND SUSTAINING X-SHELF FULL WRITING ADDRESSING Zn L PDP Driving signal is largely divided into three(Y, X, Z) as shown above. They are outputs of Yboard, X-board, DATA-board (COF) respectively. Each Sub-field is divided into ADDRESSING, SUSTAINING, ERASING parts.
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.
Description Of Each BLOCK 4-2-3. DIGITAL PCB ID1 1st_chip(A500K180) ID2 2nd_chip(A500K270) ID3 & ID4 RGB DATA [0:3] Inverse Gamma & Dithering Weight Conversion SDRAM (64M x 2) PISO SDRAM Controller APL Detection PDP Driving Timing Controller Z Driver Control Signal Y Driver Control Signal ID33 X Driver Control Signal ROM (M27C1024) : Data Flow : Control Address Flow : ROM Data Flow 1.
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.
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).
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.
Description Of Each BLOCK 4-2-4.
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.
Description Of Each BLOCK 4-2-5.
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 PO
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.
Description Of Each BLOCK 4-3. POWER BLOCK 4-3-1. POWER BLOCK DIAGRAM Main B+ AC Input Line PFC 5V out Vlow Filter 12V out B+ 15V 30V out 15V out Sequence ST- BY Control 5V out Block 5V 3.3V out IC B+ Main B+ IC ON/OFF Vadd Vadd Block Discharge IC ON/OFF Main B+ Vsus Vsus IC B+ POWER Vyer ON/OFF 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.
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. 1 2 3 4 5 6 7 Vsus Vadd Vyer Vdr1 V1 V2 V3 8 9 10 V4 V5 Vstb Rating Variable Range (V) (V) 175 10 70 10 160 10 15.5 5 12 17 -17 5.1 3.6 5 Tolerance (V) 0.75 0.25 0.6 0.75 0.75 0.55 0.33 0.5 Voltage(Vdc) Allowable overshoot Voltage(V) 200 90 180 18 6 13.6 18 -18 6.5 3.
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.
5. SERVICE MODE 5-1. Entering SERVICE MODE Push Remote controller’s “UP” MUTE DISPLAY SERVICE adjust MODE. 5-2.
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.
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.
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 initialiaztion.
6.Adjusting Method 6-1. Adjusting WHITE BALANCE (1) Input 5 STEP GRAY SCALE PATTERN to Video Input Terminal. (refer to FIG<26>) (2) Set the SCREEN MODE to NORMAL . (3) Enter SERVICE MODE by inputting remote controller s => MUTE UP MUTE DISPLAY BUTTON, and then select PW171 and check Default Values of SERVICE MODE Items. (refer to article 5. Service Mode) (4) Attach WHITE BALANCE METER(FACTORY USE METER: CA-100) SENSOR to 80% Gray Scale part.
Adjusting Method 6-2. Adjusting Driving Voltage and Waveform 6-2-1. Adjusting POWER PCB (Note.1) Factory adjusted optimum voltage is stated at the LABEL located above the VIDEO PCB. (refer to FIG<1>) (Note.2) After replacing POWER PCB, adjust each voltage to optimum control voltage stated at the LABEL. (Note.3) Screen Condition : Enter SERVICE MODE and run TEST PATTERN FULL WHITE (refer to 5. Service Mode) (Note.4) Contact MULTIMETER s (-) TIP on the CHASSIS GROUND and (+) TIP on the adjusting TP.
Adjusting Method (Note.1) Factory adjusted optimum voltage is stated in the LABEL above the VIDEO PCB. (refer to FIG<1>) (Note.2) After replacing X-SUS PCB, adjust each voltage to the optimum adjusting voltage as stated in the LABEL (Note.3) Screen Condition : After entering SERVICE MODE, run TEST PATTERN FULL WHITE (refer to 5. Service Mode) (Note.4) Contact MULTIMETER s (-) TIP on the CHASSIS GROUND and (+) TIP on the adjusting TP. (refer to FIG<22>) (Note.
Adjusting Method 1) Ramp Up Slope Adjustment Adjusting VOLUME : RY2 (refer to FIG<6-2>, and FIG<2>) Adjusting Method : Adjust VOLUME direction as shown below. 15 RY2 2) Ramp Down Slope Adjustment Adjusting VOLUME : RY10 (refer to FIG<6-2>, and FIG<2>) Adjusting Method : Adjust VOLUME direction as shown below.
Adjusting Method FIG<6-1>X-SUS PCB Adjusting Points -41-
Adjusting Method FIG<6-2>Y-SUS PCB Adjusting Points -42-
7. SOFTWARE UPGRADE Method 7. SOFTWARE UPGRADE Method 1. Connect the JACK PCB to the Video PCB. 2. Connect 9 PIN serial cable to the computer s serial port. 3. Connect serial cable s opposite end to Jack PCB s RS-232C port. 4. Run PC s Flashupgrader.exe and then push Next(N) > button. 5. Select current Upgrade file - Copy files sent by research center to a folder you wish to copy. - Browse and Select pwSDK.inf from the folder. - Push Next(N) > button.
SOFTWARE UPGRADE Method 6. Select as above and push Next(N) > button. Select Comm port and Boud rate and push Next(N) > button. 7. Upgrade process will be displayed. Power the AC on will initiate the download.
SOFTWARE UPGRADE Method 8. When all files Upgrade are complete, a window(below) will open. Push Finish button to complete the process.
8. SET Disassemble/Assemble Method 8. SET Disassemble/Assemble Method. 8-1. Facts You Must Know When Disassembling/Assembling PDP SET (1) BACK COVER can be opened without separating the STAND from the PDP SET. (i.e. BACK COVER can be opened without laying the SET) (2) When PDP SET is opened with STAND attached, STAND connecting screws (without the BACK COVER) must be used to stabilize the set.
SET Disassemble/Assemble Method P302~P304, PA603) Detach iron support Unscrew screws (8)CONN-LEFT PCB (refer to FIG<6>, FIG<8>, FIG<11>) Detach STAND from PDP SET Lay PDP SET in a stable place Detach Stand holding iron structures (LEFT & RIGHT) (PC5~PC7, P304A, PC08A) Detach JACK PCB Detach Connecting Connector Unscrew screws (9)CONN-RIGHT PCB (refer to FIG<6>, FIG<8>, FIG<11>) Detach STAND from PDP SET Lay PDP SET in a stable place Detach Stand holding iron structures (LEFT & RIGHT) (PC1~PC4, P
SET Disassemble/Assemble Method (Note) Be cautious of FILTER GLASS not being stained with dust or extraneous material. Clean FILTER GLASS with a clean and soft cloth before assembling. 8-3-2. Assembling/Disassembling procedures without STAND attached. (1) Lay the Set on soft and safe place. (2)Detach BACK COVER (3)Unscrew the lower 2 screws of 3 screws located at the TERMINAL PLATE.
9. Main PCB Trouble Diagnosis 9-1. VIDEO & JACK PCB Trouble Diagnosis 1.
Main PCB Trouble Diagnosis COMPOSITE Input : TP Vin check S- VHS input : Check 24th pin of P502(when COLOR BAR PATTERN) If above signal do not appear, JACK PCB has a trouble. (3)TP DECOE Check If DECOE signal do not appear, JACK PCB has a trouble. ( CF : When COMPOSITE NTSC 3.58MHz, check TP COMB. CCOMB as well) (4)TP VVS. VHS. VCLK. VPEN1 Check If VVS. VHS. VCLK. VPEN1 signal do not appear, JACK PCB has a trouble. 3. When DTV (1080i. 720P.
Main PCB Trouble Diagnosis If above signal do not appear, JACK PCB has a trouble. (3) TP GHS . GVS . GCLK check If GHS . GVS . GCLK signal do not appear, JACK PCB has a trouble. 4. When PC signal do not appear on screen (1)Input DTV or VIDEO signal and see if DTV or VIDEO signals shown on screen If no signal then check TP DCLKB. DHS. DVS If DCLKB. DHS. DVS signal do not appear, JACK PCB has a trouble.
Main PCB Trouble Diagnosis 5. When No Sound Check start Does sereen appear? 1. Confirm AC connection 2. Confirm Power S/W ON 3. Check Video or other PCBs Is the Sound input Jack correctly connected? Check the connection of Jack(PDP or AV device) Is the Speaker correctly connected? Check the connection of Speaker IC704(CXA2069) has a trouble. So, exchange JACK PCB. Is TP L_OUT or R_OUT normal? IC 700 (MSP3420)has a trouble. So, exchange JACK PCB.
Main PCB Trouble Diagnosis 6. When Key does not operate Check start 1. Confirm AC connection 2. Confirm Power S/W ON 3. Check other PCBs Does LED next to Power S/W turn on in Red? Does LED turn on in Green? 1. Check the connection to Video PCB 2. Check the Video PCB or other PCBs Is P601 s 2nd pin output normal? 1. PA601 CONNECTOR has a trouble 2. Exchange Key PCB.
Main PCB Trouble Diagnosis 7. When Remote Controller does not operate Check start 1. Confirm AC connection 2. Confirm Power S/W ON 3. Check other PCBs Does LED next to Power S/W turn on in Red? Does Remote Controller operate? Does Set turn on with Key operation? Check the Battery of Remote Controller 1. Check the connection to VIDEO PCB 2. Check VIDEO PCB Whenever push remote controllers button, does P602 s 2nd Pin output? LED PCB has a trouble. So, Exchange LED PCB 1.
Main PCB Trouble Diagnosis 9-2. DIGITAL PCB Trouble Diagnosis ( * Check voltage using MULTIMETER(DC voltage measure MODE), Refer to FIG<9-1> for check point position ) 1. Turn Power OFF Turn HIGH VOLTAGE Switch of POWER PCB OFF Turn the Power ON . 2. Check POWER CONNECTOR( P301A ) for 5V, 3.3V input. (1)5V input(1st and 2nd pin from the top) : Normal if 4.8V~5.2V (2)3.3V input(6th and 7th pin from the top) : Normal if 3.2V~3.6V 3. Check the POWER related TP 2.5V, 3.3V_1~ 2, 5V_1~6 . (1)2.
Main PCB Trouble Diagnosis (2)DHS (3)DEN -56-
Main PCB Trouble Diagnosis (4)DCLK (5)CLK50M -57-
Main PCB Trouble Diagnosis (6)M_CLK (7)F_SUBF -58-
Main PCB Trouble Diagnosis (8)CLK480 (9)SLCT -59-
Main PCB Trouble Diagnosis (10) F_32SFT (11) STILL : Continuously Maintaining 0 V (12) OUT_CLK (13) DEN_OUT : (3) Same as DEN (DELAY form of DEN ) (14) DCLK_OUT : (4) Same as DCLK ( Only phase is different from DCLK ) -60-
Main PCB Trouble Diagnosis FIG<9-1 >. DIGITAL PCB LAYOUT ID26 P301A CD1 CD2 LD1 5V_6 ID33 5V LD2 1 GND CD3 CD4 NC CD5 CD6 3.3V DVS ID3 ID32 3.3V_1 ID4 GND CLK50M 1 CD8 CD7 CD10 CD11 M_CLK 3.3V_2 2.
Main PCB Trouble Diagnosis 9-3. X-SUS PCB Trouble Diagnosis 1. After disconnect P201A CONNECTOR, turn on the power. 2. If the power turn on normally, check X_SUS PCB. 3. Disconnect P202A Connector. 4. Check remaining voltage of P201A. Current model contains Discharge Resistance for discharging High Voltage (Vsus, Vadd) remaining inside the POWER PCB. Therefore, when dozen or more remaining voltage is measured, it could be POWER PCB failure.
Main PCB Trouble Diagnosis (Table 1.) Diode Tester Measure Value of PA7 s Each Terminal + : red, - : black NAME DIODE TESTER 173V + GND - 15V + GND - Vadd + GND - 1 2 3 MEASURE DIODE TESTER - Open Over 0.7V + - Over 1.9V Over 0.4V + - Open MEASURE Open + (Table 2.
Main PCB Trouble Diagnosis (Table 3.) FET Diode Tester Measure Value + : red, -: black Location 1 QU19-QU20 2 QU15-QU18 NAME DIODE TESTER MEASURE D + After about 5 sec, - S - Over 2.2V + D + S - Open DIODE TESTER MEASURE + Over 0.5V Over 0.4V (table 4.) When HIC Diode test, do as the method equal to Y-SUSPCB Check ( refer to 9-4) Note after X_SUS PCB Repair Make sure to check power module s high voltage (Vsus, Vadd). If remaining voltage detected, use resistance to discharge them.
Main PCB Trouble Diagnosis 9-4. Y-SUS PCB Trouble Diagnosis 1. After detach SCAN PCB from Y_SUS PCB, turn on the power. 2. If turn on normally, check SCAN PCB. Detach just SCAN PCB from Y-SUS PCB and perform DIODE TESTER measurement as below. 1 2 3 NAME DIODE TESTER MEASURE DIODE TESTER MEASURE Vpp + Open - Over 0.4V Vss - Vpp + TP - TP + Vss - + Open - Over 0.6V + Open - Over 0.
Main PCB Trouble Diagnosis 1) Vsus (173V) Voltage CHECK: When keeping above 10 volt, Using not less than 1 K ohm 5 Watt resistance to discharge remaining voltage.(Under 5 volt ) 2) Vadd (68V) Voltage CHECK: When keeping above 10 volt, Using not less than 1 K ohm 5 Watt resistance to discharge remaining voltage.(Under 5 volt ) 7. Check the Connectors Connection. 8. If no fault detected from above tests, do the following. (1) Use DIODE TESTER reffering to the following Table.1~4.
Main PCB Trouble Diagnosis (Table 2.) Diode Tester Measure Value of P102A and P103A’s Each Terminal + : red, - : black Terminal Shape :(Top view, components side) P103A P102A 1 2 3 4 5 6 7 8 9 1011 1 2 3 4 5 6 7 GND P103A DIODE TESTER - GND + DIODE TESTER MEASURE + - MEASURE 1 Over 1.2V 1 Over 0.4V 2 OPEN 2 Over 0.8V 3 OPEN 3 Over 0.8V 4 OPEN 4 Over 0.8V 5 OPEN 5 Over 0.8V 6 OPEN 6 Over 0.8V 7 OPEN 7 Over 0.8V 8 Over 1.9V 8 Over 0.8V 9 OPEN 9 Over 0.
Main PCB Trouble Diagnosis (table 3.) FET Diode Tester Measure Value + : red, -: black Location 1 QY20-QY23 2 QY7-QY12 3 QY14-QY19 4 QY13 5 QY1-QY2 6 QY3-QY5 NAME DIODE MEASURE TESTER DIODE TESTER D + After about - S - 3 sec, OPEN + D + S - D + S - D + S - D + S - D + S - OPEN OPEN OPEN OPEN OPEN -68- - MEASURE Over 0.4V Over 0.4V + - Over 0.4V + - Over 0.4V + - Over QY1-0.4V + Over QY2-0.5V + Over 0.
Main PCB Trouble Diagnosis (table 4.) HIC(Hybrid IC) Diode Tester Measure Value + : red, -: black For the HIC inside Y-SUS PCB, PIN number starts from lower right when the PCB is attached to the SET and looked from the front. For the HIC inside X-SUS PCb, PIN number starts from upper left when the PCB is attached to the SET and looked from the front.
Main PCB Trouble Diagnosis DIODE TESTER + 1~4 5 6 7 8 9~`10 11 12 13 14 15 16 17 GND 18 19 20 21~22 23 24~25 26~27 28 29~30 31 32~35 36 37~38 39~40 DIODE TESTER + 1~4 5 6 7 8 9~`10 11 12 13 14 15 16 17 GND 18 19 20 21~22 23 24~25 26~27 28 29~30 31 32~35 36 37~38 39~40 MEASURE After about 15sec, OPEN NC 0.5V DLTKD Over 1.2V NC GND NC Over 1.2V 0 Over 1.2V NC Over 1.2V 0 NC Over 1.2V 0 After about 10sec, OPEN NC OPEN OPEN NC After about 10sec, OPEN NC GND NC OPEN OPEN MEASURE Over 0.7V NC Over 0.
Main PCB Trouble Diagnosis 9-5. CONNECTION PCB & DATA COF Trouble Diagnosis 1. If vertical line is missing or the discharge is other than bar shape on the screen, check CONNECTION and DATA COF. 2. Check CONNECTION and/or DATA COF if following. When P202 is connected, if Vadd and/or 5V is not supplied normally. But, when separated, Vadd and/or 5V is supplied normally. If this is the case, check each connectors connection. (Check if there isn t any extraneous material between the Connector pins.
Main PCB Trouble Diagnosis 9-6. POWER PCB Trouble Diagnosis Although X-SUS / Y-SUS / SCAN / DATA COF are checked, but still the set does not operate, and then check if the following Power PCB s Trouble Symptoms appear. After unplugging X-SUS / Y-SUS PCB s Power Connectors(P101A, P201A) and checking remaining voltage, there still exist several tens of remaining voltage. When output condition of Power Module is set to LOW-Voltage, output voltage table lists 4~10 are NOT normal.
10. TROUBLE SHOOTING 10-1. Facts you must know when Trouble diagnosis or repairing (1) Set s trouble diagnosis and repairing means Module Exchange . In other words, find out which PCB modules are not working and replace them with normal PCB modules. Do not need to fix broken PCB modules in themselves. (2) This TROUBLE SHOOTING list only contains representative and simple PCB trouble diagnosis and Module Exchange method.
TROUBLE SHOOTING (Note.1) SCAN PCB is divided into SCANH PCB (drive upper screen) and SCANL PCB (drive lower screen). Each SCAN PCB contains four (64 PIN Output) SCAN DRIVER IC. SCANH PCB drives upper 240 lines out of 480 total lines and SCANL PCB drives lower 240 lines. Therefore, if either screen s upper or lower part is abnormal, then it is possible that one of SCANH PCB or SCANL PCB is broken or having a bad CONNECTION. (Note.
Main PCB Trouble Diagnosis POWER SHUT DOWN occur ( refer to Service Manual 10-3 ) (5)Symptoms of DIGITAL PCB Trouble (Note) DIGITAL PCB produces CONTROL SIGNALs for normal operation of Driving BLOCK(X-SUS,Y-SUS,SCAN,DATA). Trouble of this PCB could generate further damage to Driving BLOCK circuit. In other words, if Driving BLOCK CONTROL SIGNALs are abnormal, all kinds of trouble symptoms of PCBs within Driving BLOCK could occur.
Main PCB Trouble Diagnosis - Possible Symptoms when VIDEO or DIGITAL PCB has a trouble DIGITAL Y-SUS ( Y-CONTROL : P102 P102A, P103 P103A) - Possible Symptoms when Y-SUS PCB or SCAN PCB has a trouble DIGITAL CONN-LEFT ( P304 P304A ) - Possible Symptoms when DATA COF(1st ~ 3rd PAD from left) or CONNLEFT PCB has a trouble ( refer to Trouble Symptom Picture <2> ~ <4> ) DIGITAL CONN-RIGHT ( P302 P302A, P303 P303A ) - Possible Symptoms when DATA COF(4th ~7th PAD from left) or CONNRIGHT PCB has a trouble ( refer
Main PCB Trouble Diagnosis 10-3. Trouble Diagnosis and Repairing Method for Representative Symptoms (1)When POWER SHUT DOWN occurs <1> Definition of SHUT DOWN - When LED Color is Green, can t hear POWER operating sound. (Red : STAND BY, Green : Operating) - When Turn OFF and turn ON AC SWITCH again, and turn Remote Control POWER ON , POWER RELAY do not operate normally, and POWER operating sound can not be detected.
Main PCB Trouble Diagnosis images are displayed. <2> PCB Check Priority(Left to Right) - X-SUS, Y-SUS, SCAN, POWER, DATA, DIGITAL, CONN-LEFT/RIGHT <3> Trouble Repairing Procedure - First, refer to 6-2 Adjusting Driving Voltage and Waveform to check if each voltage is adjusted according to Optimum Voltage LABEL . If the there are voltage difference, adjust voltage according to the Optimum Voltage LABEL and then check the screen.
Main PCB Trouble Diagnosis connection(PS01~PS04). Otherwise check SCANL PCB s connector connection(PS05~PS08 ). Secondly, check if there are no dust, bits of iron, or any other extraneous material between the connectors. Thirdly, reassemble and check if the problem is solved. If the problem still exits, try to replace problematic SCAN PCB.
Main PCB Trouble Diagnosis AC PWR "OFF" BACK COVER "OPEN" POWER PCB’s HIGH VOLTAGE SWITCH "OFF" (refer to FIG<21>) AC PWR "ON" PWR "ON" with Remote Controller "SHUT DOWN" occur? * LOW VOLTAGE part is N. G. *PCB check priority : DIGITAL => VIDEO => POWER *Trouble Diagnosis in order shown as FIG<10-2> * HIGH VOLTAGE part is N. G.
Main PCB Trouble Diagnosis AC PWR "OFF" POWER PCB’s HIGH VOLTAGE SWITCH "OFF" (refer to FIG<21>) Disconnect X-SUS, Y-SUS ’s PWR Connector (P201A, P101A) AC PWR "ON" => PWR "ON" with Remote Controller "SHUT DOWN" occur? Disconnect DIGITAL’s PWR Connector (P301A) Reconnect only X-SUS’s PWR Connector (P201A) AC PWR "ON" => PWR "ON" with Remote Controller AC PWR "ON" => PWR "ON" with Remote Controller "SHUT DOWN" occur? "SHUT DOWN" occur? VIDEO or JACK PCB is N.G. DIGITAL PCB is N.G. X-SUS PCB is N.
Main PCB Trouble Diagnosis AC PWR "OFF" POWER PCB’s HIGH VOLTAGE SWITCH "ON" (refer to FIG<21>) Disconnect X-SUS, Y-SUS’s PWR Connector (P201A, P101A) AC PWR "ON" => PWR "ON" with Remote Conrtoller "SHUT DOWN" occur? AC PWR "OFF" POWER PCB is N.G. Reconnect only X-SUS’s PWR Connector (P201A) AC PWR "ON" => PWR "ON" with Remote Controller "SHUT DOWN" occur? X-SUS PCB is N.G. Y-SUS or SCAN PCB is N.G.
Main PCB Trouble Diagnosis AC PWR "OFF => BACK COVER OPEN Y-SUS & SCAN PCB DIODE TEST (refer to 9-4 and FIG<23>) DIODE VOLTAGE Normal? With SCANH/L PCB separated from Y-SUS PCB, DIODE TEST for SCANL/H PCB (refer to 9-4, FIG<24> ~ <25>) Replace X-SUS PCB AC PWR "ON" => PWR "ON" with Remote Controller Discharge still abnormal? Replace Y-SUS PCB SCANL/H PCB DIODE VOLTAGE Normal? X-SUS PCB is N.G. SCAN PCB is N.G. Discharge still abnormal? Y-SUS PCB is N.G. Replace SCANL/H PCB SCANL/H PCB is N.G.
11. ASSEMBLY LIST No.
-84-
13.
FIGURE COLLECTION FIG<2> Y-SUS & SCAN -87-
FIGURE COLLECTION FIG<3> X-SUS -88-
FIGURE COLLECTION FIG<4> VIDEO & JACK -89-
FIGURE COLLECTION FIG<5> POWER -90-
FIGURE COLLECTION FIG<6> INLET -91-
FIGURE COLLECTION FIG<7> LEFT-UP -92-
FIGURE COLLECTION FIG<8> LEFT-DOWN -93-
FIGURE COLLECTION FIG<9> RIGHT-UP -94-
FIGURE COLLECTION FIG<10> RIGHT-DOWN -95-
FIGURE COLLECTION FIG<11> WITHOUT JACK -96-
FIGURE COLLECTION FIG<12> DIGITAL -97-
FIGURE COLLECTION FIG<13> AC SWITCH ASSEMBLY -98-
FIGURE COLLECTION FIG<14> SCAN-ASSEMBLY 1 -99-
FIGURE COLLECTION FIG<15> SCAN-ASSEMBLY 2 -100-
FIGURE COLLECTION FIG<16> X-SUS_ASSEMBLY -101-
FIGURE COLLECTION FIG<17> FRONT MASK_ASSEMBLY -102-
FIGURE COLLECTION FIG<18> FRONT MASK_INSIDE -103-
FIGURE COLLECTION FIG<19> BACK COVER -104-
FIGURE COLLECTION FIG<20> POWER ADJUSTING POINTS -105-
FIGURE COLLECTION FIG<21> POWER HIGH VOLTAGE SWITCH -106-
FIGURE COLLECTION FIG<22> HOW TO ADJUST VOLTAGE -107-
FIGURE COLLECTION FIG<23> Y-SUS & SCAN PCB DIODE TEST -108-
FIGURE COLLECTION FIG<24> SCANH PCB DIODE TEST -109-
FIGURE COLLECTION FIG<25> SCANL PCB DIODE TEST -110-
FIGURE COLLECTION FIG<26> 5 STEP GRAY SCALE PATTERN -111-
14.
Trouble Sumpton Picture Trouble Symptom Picture<2> -113-
Trouble Sumpton Picture Trouble Symptom Picture<3> -114-
Trouble Sumpton Picture Trouble Symptom Picture<4> -115-
Trouble Sumpton Picture Trouble Symptom Picture<5> -116-
Trouble Sumpton Picture Trouble Symptom Picture<6> -117-
Trouble Sumpton Picture Trouble Symptom Picture<7> -118-
Trouble Sumpton Picture Trouble Symptom Picture<8> -119-
Trouble Sumpton Picture Trouble Symptom Picture<9> -120-
Trouble Sumpton Picture Trouble Symptom Picture<10> -121-
Trouble Sumpton Picture Trouble Symptom Picture<11> -122-
Trouble Sumpton Picture Trouble Symptom Picture<12> -123-
