Daewoo DPP-42A1LASB Service Manual Download Page 77 | Manualshive

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1. Checking for no Picture

A screen doesn’t display at all and condition of black pattern or power off.

(1) Check whether the CTRL B/D LED(D1, D2, D3, D4, D5) is turned on or not.
(2) Check the power and signal cable of CTRL B/D.
(3) X B/D, Y B/D, Z B/D is well plugged in.
(4) Check the connection of X B/D, Y B/D and Z B/D to CTRL B/D.
(5) Measure the output wave of X, Y, Z B/D with oscilloscope(more than 200MHz)

and find the trouble of B/D by comparing the output wave with below figure.

- Measure Point fo Y B/D : Bead B39
- Measure Point fo Z B/D : Bead B28
- Measure Point fo X B/D : P3

(6) Check the SCAN(Y side) IC
(7) Check the DATA(X side) TCP IC
(8) Replace the CTRL B/D.
(9) Check the Fuse of Y, Z B/D is open and replace when open.
(10) Check the input voltage. (Vcc=5V/Va=65V/Vs=187V)

English

- 9 -

Ⅳ

. Trouble Shooting

Y B/D Output wave (1frame)

Z B/D Output wave (1frame)

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Summary of Contents for DPP-42A1LASB

Page 1: ...mproving their performance without notice in the parts list So if you need the latest parts information please refer to PPL Parts Price List in Service Information Center Service Manual 42 PLASMA PDP TV CHASSIS Model S M NO DSP220PEF0 SP 220P DPP 42A1LASB ...

Page 2: ... 5 3 Screen 30 5 4 Features 30 6 Service Mode 31 7 Power PCB 33 7 1 Input and Environmental Requirement 33 7 2 Output Characteristics 33 7 3 Function of Protection 33 7 4 Connector Specification 34 8 Power Adjustment 35 8 1 Vs Sustain Voltage 35 8 2 Vs Adress Voltage 36 8 3 5Vcntl 37 9 Noticeable Points While Assembling 38 10 Software Upgrade Method 41 11 Trouble Shooting 44 12 Assembly List 59 13...

Page 3: ...NG make sure to check if any screw is missing when assembling reassembling Do not leave any screws inside the set 5 If you open the BACK COVER you will see a Panel Gas Exhaust Tube Picture 1 1 inside the bracket If this part is damaged the entire PDP PANEL must be replaced Therefore when working with the set be careful not to damage this part Picture 1 1 Panel Gas Exhaust Tube 6 A PDP Set contains...

Page 4: ... 50 60Hz Y C 1 Port 3 2 DTV DVD INPUT 1080i 720P 480P 480i 576P 576i Y Pb Cb Pr Cr COMPONENT SIGNAL 2 Ports 3 3 SCART INPUT SCART COMPOSITE R G B SOUND R L 2 Ports 3 4 PC INPUT VGA SXGA Dot clock 110MHz 15 PIN D SUB 1 Port 3 5 DVI INPUT DVI D INPUT DVI Jack 1 Port 3 6 TV INPUT 1 COLOR STANDARD PAL B G I I D K L SECAM L SECAM 2 ANTENNA IN ONE INPUT 75 Unbalanced DIN Standard 3 RECEPTION CHANNEL VHF...

Page 5: ... Selection TV VIDEO DVD CATV SAT 10 KEYS 0 10 Recall VCR DVD KEY F R SLOW Play F F SLOW Stop PAUSE OPEN CLOSE PREV NEXT MENU TV AV Component PC DVI STILL PREV PR MUTE PR UP DOWN VOL UP DOWN SCREEN MODE MIX Screen Size Sleep Timer I II CYAN Sound Mode Index Red Green Yellow TXT Reveal Update Expand Subpage Hold PIP SWAP PR PR Position Sourse 5 3 ACCESSORIES REMOTE CONTROL INSTRUCTION MANUAL POWER C...

Page 6: ...809 VESA O O 640 X 480 37 500 75 000 VESA O O 720 X 400 31 469 70 087 IBM O O 35 156 56 250 VESA O O 800 X 600 37 879 60 317 VESA O O 1024 X 768 48 363 60 004 VESA O O 2 Component z 1080i 50 60Hz z 720p 50 60Hz z 576p 50 60Hz z 480p 50 60Hz 3 Video z PAL PAL M PAL N z NTSC NTSC 4 43 z SECAM 5 Product Specification ...

Page 7: ... 6 Product Specification 2 3 Remote Control Setup Code ...

Page 8: ...NSAI 021 029 055 DAWA 155 DAYTRON 021 061 DE GRAAF 113 177 DECCA 039 044 047 065 090 148 155 166 175 DECCA UK 054 DEGRAAF 015 039 049 054 065 113 148 DEITRON 021 DENKO 029 DENON 113 DESMET 155 DIAMANT 055 DIXI 078 DOMOH 155 DORIC 160 DUAL 021 039 044 065 090 112 148 155 DUMONT 015 039 054 065 148 155 175 189 DYNATECH 039 148 ELBE 021 036 148 ELCATECH 029 ELIN 056 113 155 ELSAY 029 ELTA 021 029 148...

Page 9: ... 8 Product Specification ...

Page 10: ... 9 Product Specification ...

Page 11: ... 10 Product Specification ...

Page 12: ... 11 Product Specification ...

Page 13: ...Product Specification 12 ...

Page 14: ...Product Specification 13 ...

Page 15: ...Product Specification 14 ...

Page 16: ...Product Specification 15 ...

Page 17: ...Product Specification 16 ...

Page 18: ...Product Specification 17 ...

Page 19: ... 18 Product Specification ...

Page 20: ... 19 Product Specification ...

Page 21: ...Product Specification 20 ...

Page 22: ...Product Specification 21 ...

Page 23: ...Product Specification 22 ...

Page 24: ...Product Specification 23 ...

Page 25: ...Product Specification 24 ...

Page 26: ...Product Specification 25 ...

Page 27: ...Product Specification 26 ...

Page 28: ... 27 DPP 42A1LASB Inside Features 3 The Features of Inside ...

Page 29: ...R Speaker L AV1 AV2 SUB B D FFC Cable DVI Audio DVI PC Audio PC D SUB Component1 2 S VHS AV3 Main Tuner Sub Tuner RS 232 Upgrade LED PCB 4850710S22 4859004460 4850710S21 4850708S16 4850706S35 12V 5V STB 3 3V 4850705N31 33V 17V AV3 PCB 4859004060 4850712S03 ...

Page 30: ... in picture mode Function Default Value Colour Temp Normal N R NR1 CTI On z N R means the noise reduction z DVI PC don t support N R and CTI functions 2 Sound 1 Mode Normal Movie Music News User 120 Hz 32 50 48 15 Undefined 500 Hz 32 38 38 32 Undefined 1 5 kHz 32 28 15 50 Undefined 5 kHz 32 40 42 32 Undefined 10 kHz 32 48 56 15 Undefined 2 Default value of other functions in sound mode Function De...

Page 31: ...able only in PC mode 4 Features 1 Mode Function Background Language Child Lock MGDI Auto Power Default Value 10 English Off On Off z DVI PC don t support MGDI function 2 Time Setting Function Clock Auto Clock Off Timer Off Time Wake Timer Wake Time Wake Prog Wake Vol Default Value Undefined On Off PM 12 00 Off PM 12 00 1 20 3 ISM Function Pixel Shift Low Bright Image Invert Default Value Off Off O...

Page 32: ...S adjustment All inputs z Bias G For G BRIGHTNESS adjustment All inputs z Bias B For B BRIGHTNESS adjustment All inputs z Gain R For R CONTRAST adjustment All inputs z Gain G For G CONTRAST adjustment All inputs z Gain B For B CONTRAST adjustment All inputs 2 Pw318B_2 z Sub Bias For DVI BRIGHTNESS adjustment z Sub Gain For DVI CONTRAST adjustment 2 Pw3300_1 Function R Offset G Offset B Offset R Ga...

Page 33: ...f TXT Lang TXT T F Default Value On Auto TOP z Tst Ptrn AT shows five cycled patterns white black red green blue every 1 minute automatically z Tst Ptrn MA shows five cycled patterns manually by pressing volume up key 6 Panel Function Sync Mode Bright Mode Power Mode Gamma Mode Panel Temp Default Value AUTO 100 100 2 2N z Panel Temp indicates the current temperature of the panel 7 Reset z Level 1 ...

Page 34: ...onditions 2 Output Characteristics Output Circuit Norminal Voltage V Voltage Adjustment V Load Variation A Ripple Noise mV p p Vs 175 160 190 0 4 1 5 500 500 Vd 60 55 65 0 01 2 5 300 300 5V ctrl 5 1 4 75 5 25 1 2 4 0 30 200 5V 5 1 4 75 5 25 0 5 4 5 50 200 DTV3 4V 3 4 0 5 2 0 50 200 DTV2 5V 2 5 0 2 2 0 50 200 33VT 33 0 0 0 05 100 400 12V 12 0 0 2 0 100 400 17V Audio 17 0 0 0 7 100 400 17V Audio 17 ...

Page 35: ...down Over Voltage 17V 19 24V Shut down 4 Connector Specification Connector CN803 PV CN806 CN804 PM CN801 PA CN805 CN01 Type YMW025 10R B10P VH YMW025 08R YMW025 06R B4P VH YFW800 02 Maker YEONHO JST YEONHO YEONHO JST YEONHO The number of pins 10 10 8 6 4 2 1 5V Stand_by LVP 3 4V 33VT 5Vctrl AC L 2 POWER GND 3 4V GND 5Vctrl AC N 3 GND GND GND 17 GND 4 GND GND GND GND GND 5 5V GND 2 5V GND 6 GND Vd ...

Page 36: ...classify that PDP module as a fault and contact to PDP module maker z Input Video Pattern 100 IRE Full White Pattern Figure 3 Voltage Adjustment Label 1 Vs Sustain Voltage Discharge Sustain Voltage z Measurement Equipment Digital Volt Meter DC volt mode z Adjusting TP TP204 z Adjusting Location RV203 z Optimum Adjusting Voltage The voltage which is written in the label located in upper right side ...

Page 37: ...Equipment Digital Volt Meter DC volt mode z Adjusting TP TP206 Vd z Adjusting Location RV204 Vd ADJ z Optimum Adjusting Voltage The voltage which is written in the label located in upper right side of the PDP module Typical Voltage 65V Power Adjustment 36 ...

Page 38: ...ment Digital Volt Meter DC volt mode z Adjusting TP TP203 z Adjusting Location RV201 z Optimum Adjusting Voltage The voltage which is written in the label located in upper right side of the PDP module Typical Voltage 5 2V Power Adjustment 37 ...

Page 39: ...re Filter EMI S N 5PZCAT3035 1 Turn with AV3 Cable as shown in the figure below 2 Insertion of Ring Core to the Power Cable Insert a Ring Core Filter EMI S N 5PZCA2009A to 8 pin and 6 pin Power Cable Speaker Cable 2 Turn AV3 Cable 1 Turn Speaker AV3 Cable Allocation Separate with Power Cable Speaker Cable 2 Turn No Ring Core in Key Cable Speaker KEY Cable Allocation 9 Noticeable Points While Assem...

Page 40: ... a DIGITAL B D part Æ CLAMP WIRE S N 4856818800 Æ CLAMP WIRE S N 4856815900 Place these CLAMP WIRES as shown in the figure below Make LVDS Cable not to touch on the Terminal Plate while connecting b VIDEO B D part Noticeable Points While Assembling 39 ...

Page 41: ... S N 485A100071 Position From top of Scart to Terminal Channel Gasket 5 Shieldron Tape on DVI Input Æ Tape EMI S N 485A100571 attach vertically 3 X 4 2 Cm Position From top of DVI to Terminal Channel Gasket Noticeable Points While Assembling 40 ...

Page 42: ...le to the serial port of the computer 3 Connect the opposite end of the serial cable to RS 232C port of SUB PCB 4 Run Flashupgrader exe in the PC to excute the program as shown below 5 Select current Upgrade file Click Choose button to select the file you want to upgrade Select the file pwSDK inf that you want to upgrade ...

Page 43: ...TWARE UPGRADE Method 6 Select correct COM Port and Baud Rate 115200 as shown below Then press Flash button to finish setup 7 Turn on the ac power and then upgrade program will start the download as shown below ...

Page 44: ... 43 SOFTWARE UPGRADE Method 8 When the upgrading is complete a window below will be opened Press Finish button to complete the process ...

Page 45: ... Diode Voltage Short open test 2 Screwdriver or electric screwdriver Plastic adjusting tool 3 Oscilloscope for detailed examination only z Before replacing PCBs you MUST turn the AC switch OFF z After replacing High Voltage Board Power PCB Y SUS Z SUS Data B D Scan B D and Main Sub PCB extra adjustment might be needed Refer to Power Adjustment z Dust or extraneous materials may cause bad connectio...

Page 46: ...e the connectors several minutes after AC power is off To be more careful using a Multimeter you should check to see if Vs is less than 10V and then connect connectors Definition z Red LED Stand by state ready for operating z Green LED The set is turned on and operating z Shut Down While green LED power PCB does not make any operating sound or noise i e Power relay does not operate normally z Weak...

Page 47: ...he connection of Jack PDP and AV device Is LVDS connection correctly connected Check LVDS connection between Digital B D and Main B D Does input source AV device work Check AV device Check other connections in all Boards Are they OK Connect correctly Is input selection in the correct mode Correct the input mode Replace Main B D and or Sub B D Replace Main B D and or Sub B D Done Y N Y Y Y Y Y Y N ...

Page 48: ... device properly connected Connect the jack and check the sound again Is speaker cable correctly connected check P603 P604 Connect the cable and check the sound again Is input source TV Connect the cable Replace Main B D Is the connection between PA901 and P901 OK Is sound OK N Y N Y Y N N Y Y N Y N Replace Sub B D Is sound OK Replace speakers DONE N Y Y N Trouble Shooting 47 ...

Page 49: ...h to LOW Turn AC power ON Stand By Turn on the set Green LED Is SHUT DOWN occured Connect CN806 back and disconnect CN801 CN803 CN804 CN805 Set Power PCB s voltage switch to HIGH Go to Low Voltage Shut Down part in this trouble shooting Go to High Voltage Shut Down part in this trouble shooting Y N Trouble Shooting 48 ...

Page 50: ...er PCB Done Disconnect P6 of Y SUS B D Turn AC power off Turn on the set after AC power on Is SHUT DOWN occured Turn AC power off Turn AC power off Disconnect P2 P3 of Z SUS Go to Z SUS Digital B D Data B D Shut Down part Connect P6 back and disconnect P1 of Z SUS B D Go to Y SUS Scan B D Shut Down part Y N Turn AC power off Connect all connectors and set Power PCB s voltage switch to High Y N Tro...

Page 51: ...ower off Is SHUT DOWN occured Replace Data B D Replace Digital B D Connect P2 P3 back and turn on the set after AC power on Go back to Low Voltage Shut Down part again Y N Turn AC power off Y N Is SHUT DOWN occured Connect all cables and set voltage switch to High N Y Connect all cables and set voltage switch to High Done Connect all cables and set voltage switch to High Done Trouble Shooting 50 ...

Page 52: ...AC power on Is SHUT DOWN occured Replace Y SUS B D Replace Scan B D Done Turn AC power off Y N Turn AC power off Connect all cables and set voltage switch to High Done Disconnect P3 P4 of Y SUS Connect all cables and set voltage switch to High Trouble Shooting 51 ...

Page 53: ...ect P1 of Z SUS back Disconnect P5 of Y SUS and P3 of Z SUS Turn the set on after AC power on Is Shut Down occured Turn AC power off Turn AC power off Turn AC power off Turn AC power off Replace Y SUS B D Replace SCAN B D Connect all cables and assemble the set Connect all cables and assemble the set Done Done Replace Z SUS B D Connect all cables and assemble the set Done Replace Data B D Connect ...

Page 54: ... W AC ON Check the AC connection Check the Power S W on Turn on the set using remote control Dees LED turn on to green light Replace the Main B D Replace the Key PCB Check the connector of Key PCB Check if the Key is working Replace the Main B D Done N Y N Y N Y Trouble Shooting 53 ...

Page 55: ...mote control Dees LED turn on to green light Check the other buttons of remote control Try to turn on the set using Key button Check the battery of remote control Replace the Main B D Done N Y N Y Are all buttons working properly Replace the Main B D Done Is there battery Dees LED turn on to green light Replace the LED PCB Put the battery Y N N Y Y N Trouble Shooting 54 ...

Page 56: ...ion Check Start Replace the Main B D Replace the LED PCB Done Check the battery of remote control Is the remote control working Replace the Key PCB Turn the AC Power ON Try to turn on the set using remote control Y N Trouble Shooting 55 ...

Page 57: ...voltages Do you still see the weak discharge or abnormal discharge on the screen Replace the Y SUS Do you still see the weak discharge or abnormal discharge on the screen Replace the Z SUS Do you still see the weak discharge or abnormal discharge on the screen Replace the Scan B D Done Done Y Y Y Y N N N N Trouble Shooting 56 ...

Page 58: ...Is the set correctly working Replace Y SUS Z SUS and Scan B D Done Y N Y N 9 Particular Input Signal Video PC TV or Component Does Not Work Check Start Is the input Jack correctly connected Connect the input correctly Is the input TV Replace Main and Sub B Ds Replace Main B D Done Y N Y N Trouble Shooting 57 ...

Page 59: ...perate normally Turning off and on the AC power make the set to operate normal again Î Upgrade the software first If you still see the same symptom replace the Main and Sub B D C Images are abnormal Î Check the default values of service mode and user mode If they are OK replace the Main and Sub B D If they are not OK upgrade the software and check the symptom again Trouble Shooting 58 ...

Page 60: ...R ULW 300 14 4850708S16 CONNECTOR YMH025 08R YMH025 08R ULW 300 15 4850710S23 CONNECTOR YH396 10V YH396 10V ULW 700 16 4850708S23 CONNECTOR YH396 08V YH396 08V ULW 250 17 4850704S63 CONNECTOR YH396 04V YH396 04V ULW 700 18 4850703N40 CONNECTOR 25045HP 03 25048HS 03 ULW 150 19 4850704N35 CONNECTOR YH396 04V YH396 05V ULW 700 20 4850710N24 CONNECTOR YH396 10V YH396 09V ULW 700 21 4850712S03 CONNECTO...

Page 61: ...EAKER SYSTEM SS 63A01 41 485A100071 TAPE EMI CU NI T0 13 VER1 42 485A100571 TAPE EMI CU NI 30X42XT0 2 43 4853633300 TERMINAL COVER A5052 T1 0 44 4853635200 TERMINAL PLATE A5052 T1 0 45 48B5353J17 TRANSMITTER REMOCON R 53J17 AAA 46 485AS11590 X LEFT BOARD AS Data LEFT BOARD 47 485AS11690 X RIGHT BOARD AS Data RIGHT BOARD 48 485AS11490 Y DRV BTM BOARD AS Scan BTM BOARD 49 485AS11390 Y DRV TOP BOARD ...

Page 62: ... 61 13 STRUCTURE OF PDP SET ...

Page 63: ...STRUCTURE OF PDP SET 62 COMPONENT PICTURE REMARK 1 PDP MODULE With F SUPPORT 1a Y SUS B D 1b Z SUS B D ...

Page 64: ... 63 STRUCTURE OF PDP SET COMPONENTS PICTURE REMARK 1d Data Relay PKG L 1e Data Relay PKG R 1f Scan Relay PKG T 1g Scan Relay PKG B ...

Page 65: ...STRUCTURE OF PDP SET 64 COMPONENT PICTURE REMARK 1h Digital PKG 2 MAIN BOARD 3 SUB BOARD 4 POWER BOARD ...

Page 66: ... 65 STRUCTURE OF PDP SET COMPONENTS PICTURE REMARK 5 FRONT MASK 6 FILTER GLASS 7 BACK COVER ...

Page 67: ...66 ...

Page 68: ...DAEWOO ELECTRONICS CORP PRINTED DATE Nov 2005 686 AHYEON DONG MAPO GU SEOUL KOREA C P O BOX 8003 SEOUL KOREA ...

Page 69: ...CE MANUAL CAUTION 1 BEFORE SERVICING THE PDP MODULE READ THE SAFETY PRECAUTIONS IN THIS MANUAL 2 WHEN REPLACEMENT PARTS ARE REQUIRED BE SURE TO USE REPLACEMENT PARTS SPECIFIED BY THE MANUFACTURER MODEL PDP42V7 English ...

Page 70: ...ipe is generated on the screen 2 9 One or more horizontal line is generated on screen 2 10 Lightness of screen is wholly darken though there is input signal pattern 2 11 Different color is shown partially during full white screen or electric discharge is generated during full black screen 2 12 Some lightness of some color doesn t not generated well 3 Checking for component damage 3 1 Y IPM IC15 or...

Page 71: ...s damaged or if the connector is loose do not use the product otherwise this can lead to fire or electric shock 10 If the power connector or the connector of the power cable becomes dirty or dusty wipe it with a dry cloth Otherwise this can lead to fire 11 PDP Module uses a high voltage Max 450V dc Keep the cautions concerning electric shock and do not touch the Device circuitry when handling the ...

Page 72: ...ted values of the electrical specifications are guaranteed within these conditions Always use the product within the range of the recommended operating conditions Otherwise the reliability of the product may be degraded 21 This product has a glass display surface Design your system so that excessive shock and load are not applied to the glass Exercise care that the vent at the corner of the glass ...

Page 73: ... 1080μ m V 4 Cell Pitch 320μ m H x 1080μ m V Base Green Cell 5 Display area 920 1 H x 518 4 V 0 5mm 6 Outline dimension 1005 H x 597 V x 60 6 D 1mm 7 Color arrangement RGB Closed type 8 Number of COLRO R 1024 x G 1024 x B 1024 9 Weight 14 7Kg 0 5Kg 100Kg 5Kg 5EA 1BOX 10 Aspect Ratio 16 9 11 Peak Brightness Typical 1500dc 1 10 White Window Avergae 100 1 Light room 100 Lx at center 12 Contrast Ratio...

Page 74: ... PCB ASS Y PWB PCB ASS Y PWB PCB ASS Y PWB PCB ASS Y PWB PCB ASS Y PWB PCB ASS Y PWB PCB ASS Y PWB PCB ASS Y LVDS CTRL B D ASS Y HITACHI COPPER LVDS CTRL B D ASS Y LVDS OUTER SIDE CTRL B D ASS Y PB FREE FFC CON LVDS OUTER SIDE CTRL B D ASS Y YDRV TOP B D ASS Y HITACHI COPPER YDRV TOP B D ASS Y YDRV BTM B D ASS Y HITACHI COPPER YDRV BTM B D ASS Y XR B D ASS Y PB FREE FFC CON XR B D ASS Y HITACHI CO...

Page 75: ...V to 200V more than 10A DC power supply for Va 1 Should be changeable between 0V to 100V more than 5A DC power supply for 5V 1 Should be changeable between 0V to 10V more than 10A DC DC Converter Jig 1 The Jig which has equivalent voltage output of PDP42V7 Module after taking the Vs Va 5V voltage Voltage stability of power supply Within 1 for Vs Va within 3 for 5V 3 2 Connection diagram of measuri...

Page 76: ...Vcc 5V Va 65V Vs 187V 3 The power of power supply must turned on by this sequence Reverse direction When turning off Module on 5V Va Vs Module off Vs Va 5V 4 Signal generator should be selected with 852 480 WVGA mode Fig 1 Connection diagram of measuring instrument DC Power Supply for 5V DC Power Supply for Va DC Power Supply for Vs Power Signal Generator VG 825 Also the PSU Power Supply Unit use ...

Page 77: ...L B D 5 Measure the output wave of X Y Z B D with oscilloscope more than 200MHz and find the trouble of B D by comparing the output wave with below figure Measure Point fo Y B D Bead B39 Measure Point fo Z B D Bead B28 Measure Point fo X B D P3 6 Check the SCAN Y side IC 7 Check the DATA X side TCP IC 8 Replace the CTRL B D 9 Check the Fuse of Y Z B D is open and replace when open 10 Check the inp...

Page 78: ... 10 Y B D Output wave 1SF Z B D Output wave 1SF X B D Output wave 1frame Va measurement ...

Page 79: ... be shown Equality with 2 1 2 2 The screen doesn t be shown as Data TCP Include not be shown part of DataTCP quantity or a part 1 The problem between Data TCP and X B D is more possible that the screen is not be shown as data TCP 2 Confirm the connector of Data TCP is well connected to X B D Correspond to the part that screen is not showing 3 Confirm whether the Data TCP is failed Inclusion examin...

Page 80: ...XR B D 8pin XR B D and XL B D 5pin power connector Screen Display Form 2 4 Regular Stripe is Generated about the Quantity of one Data TCP IC or more 1 In case of generating regular stripe about the quantity of one Data TCP IC or more check the connection of connector or foreign 2 Confirm the connection connector foreign of XB D or CTRL B D to X B D correspond to unusual screen 3 Replace relevant X...

Page 81: ... direction 2 6 The screen has a vertical line with regular gap A vertical stripe flash at especial color 1 This is a problem about CTRL B D 2 Replace the CTRL B D Screen Display Form 2 7 A data copy is happened into vertical direction 1 In this case it s due to incorrect marking of scan wave 2 Replace the Y DRV B D or Y B D Screen Display Form one eighth of screen The screen display is very good T...

Page 82: ...ion isn t complete 2 Check the power cord of Z B D 3 Check the connector of Z B D and CTRL B D 4 Replace the CTRL B D or Z B D 2 11 The screen displays other color partially on full white screen or happens discharge partially on full black screen 1 Check the declination of Y B D set up set down wave 2 Measure each output wave with oscilloscope more than 200MHz and compare the data with below figur...

Page 83: ...ing GND B32 Y B D O Wave format When the Set_dn does not descend until Vy 3 3 FET Ass y Y B D HS1 Damage 1 When Set_Up FET is damaged screen doesn t be shown O Test Point Enlarge the after measuring GND B32 Y B D O Wave format Set_up waveform does not come out 2 When Set_Down FET is damaged electric discharge of entire screen is generated O Test Point Enlarge the after measuring GND B32 Y B D O Wa...

Page 84: ...Top or Bottom s SCAN IC 3 Screen shaked horizontally when Y DRV B D Top and Bottom cable is poor O Test Point ICT measurance of GND Y DRV B D output O Wave format As shown below figure 4 In case of shorting the SCAN IC output by a dust foreign substance it may overlap two horizontal lines on screen O Test Point ICT measurance of GND Y DRV B D output O Wave format As shown below figure O Measurance...

Page 85: ...t be shown or happens discharge partially O Test Point Enlarge the after measuring output TP of GND TCP O Wave format Output wave doesn t come out O Measurance position Enlarge the after measuring output TP of TCP Full White Pattern 3 6 Crystal CTRL B D X1 Damage 1 When Crystal is damage the screen doesn t be shown O Test Point Measuring 3pin of GND Crystal CTRL B D X1 O Wave format Output wave do...

Page 86: ...you must only replace FD3284F IC Different IC application being not right When replacing the IC notice To prevent dust fix the same IC after removing the silicon and then it again stick the IC B D applicated FD3284F TOP 6871QDH084A BTM 6871QDH085A When B D is breakdown When IC is breakdown Only use B D applicated FD3284F TOP 6871QDH084A BTM 6871QDH085A B D applicated FD3284F TOP 6871QDH084A BTM 68...

Page 87: ...English 19 Ⅴ Block Diagram DC Power Supply for 5V DC Power Supply for Va DC Power Supply for Vs ...

Page 88: ... components list of PDP42V7 Model is as below 2 A component of mark is important to keep product s security Therefore in exchanging a component appointed component is necessary used 3 is an abbreviated word which is instead of Safety mark S S ...

Page 89: ...English 21 ...

Page 90: ...t Initial Product Initial Product Initial Product Initial Product Initial Product Initial Product Initial Product Initial Product Initial Product Initial Product Initial Product Initial Product Initial Product Initial Product Initial Product Initial Product Initial Product Initial Product Board LVDS CTRL B D ASS Y HITACHI COPPER LVDS CTRL B D ASS Y LVDS OUTER SIDE CTRL B D ASS Y PB FREE FFC CON LV...

Page 91: ...4 2005 03 04 Part Number 4921QP1031A 4921QP1031A 0ILNRFE001A 0ILNRD1002A 4921QF2007A Remark Initial Product Initial Product Initial Product Initial Product COMPONENT Y IPM YSUS B D IC15 Z IPM ZSUS B D IC2 SCAN IC YDRV B D IC1 8 TCP FET Y B D HS1 Initial Product Set_up Set_dn FET Ass y ...

Page 92: ... 24 3 ROM DATA No 1 2 Date 2005 03 04 2005 03 04 Contents Inner Type LVDS Initial ROM Data External Type LVDS Initial ROM Data ROM Data Version 42V73DN03 42V73LV03 ...

Page 93: ...March 2005 Printed in Korea 3828VD0143R ...

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