Haier HL42XR1 - 42" LCD TV Service Manual Download Page 9 | Manualshive

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Summary of Contents for HL42XR1 - 42" LCD TV

Page 1: ...ons to advise non technical individuals of potential dangers in attempting to service a product Products powered b electricity should be serviced or repaired only by experienced professional technicians Any attempt to service or repair the product deal with in this service information by anyone else could result in serious injury or death _ 2009 Qingdao Electronics limited company All rights reser...

Page 2: ... Remove the 4 7 Remove the assemble 12 Pedestal 13 Back Cover 13 speaker 13 Terminal Bracket 13 power module 14 Main board 14 remote control 14 14 4 8 Remove the keypad control Installation Instructions 5 15 5 1 External Equipment Connections 16 5 2 HDMI And DVI Connections 20 6 Operation Instructions 23 6 1 TV Side Panel Controls And Connections 23 6 2 Back Panel Connections 24 6 3 Setting Up You...

Page 3: ...11 8 2 Measurements and Adjustments 43 Trouble shooting 49 9 1 Simple check 49 9 2 Power Supply Board failure check 49 9 3 Main board failure check 51 9 4 Pannel failure 53 3 ...

Page 4: ...operating and maintenance instructions in the literture accompanying the appliance 1 2 2 Be careful to the electrical shock To prevent damage which might result in electric shock or fire do not expose this TV set to rain or excessive moisture This TV must not be exposed to dripping or splashing water and objects Filled with liquid such as vases must not be place on top of or above the TV 1 2 3 Ele...

Page 5: ...ster External exposure metal Antenna terminal Headphone jack 1 2 7 Ordering Spare Parts Please include the following informations when you order parts Particularly the Version letter 1 Model number and Version letter The model number can be found on the back of each product and the Version letter can be found at the end of the serial number 2 Part No and Description You can find them in your servi...

Page 6: ...2R1 Screen size 42inch Aspect ratio 16 9 Resolution 1920 1080 Contrast Ratio 1300 1 Angel of view H 178 V 178 Color display 16 7M OSD language English Color system ATSC NTSC Audio system DK BG I LL Audio output power Built in W 10Wx2 Audio output power outer W No Total power input W 215W Voltage range V 120V 10 V Power frequency Hz 60HZ Time of sleep timer MINS 240Min Net weight KG 27 5 Gross weig...

Page 7: ...Board B Board Power Board 3 2 Main Board AV Board 3 2 1 Function Description Main Board Process signal which incept from exterior equipment then translate into signal that panel can display 3 2 2 Connector definition Main board connector Power connectors CNA1 7 ...

Page 8: ...light on off The system can turn on or turn off the backlight of TFT LCD Panel through the power supply unit path CN 1 Pinl Control the luminance of backlight The system can generate the PWN signal to control the strength of TFT LCD Panel s backlight through this connector CNA2 Pin number Signal number 1 24V 16 5V 2 24V 16 5V 3 GND 4 GND Remote connector CNE1 Pin number Signal number 1 5VSB 2 IR I...

Page 9: ... 2 3 4 Signal number SPEA L SPEA L SPEA R SPEA R Other con nectors CNB2 to Upgrade the program of MTK5380L U13 AND FLASH U17 J3 3V3SB 1 D UORX 2 UOTX 3 4 4xl WIHOUSnNG D IP41W HIP2_O 3 3 Power Board 3 3 1 Function Description Supply power for Main board Panel 3 3 2Connectordefinition CON3 9 ...

Page 10: ...Pin Signal 1 GND GND GND 4 GND 5 GND 6 24V 7 24V 8 24V 9 24V i0 24V Pin Si_nal 12V 2 12V 3 GND 4 6ND 5 5VSB 6 OI_ 7 ON OFF CON1 CON2 Pin 1 2 4 Signal 6ND 24V 24V IO ...

Page 11: ..._tien 4 NC 5 NC 8 VBR EXT 9 OPC O_ 11 GND No Conn_tion No ConneXion No ConneXion Ex_mal VBR From System OPC ou_ From LCIVI G rou_ t2 R1AN F_RST LVDS R_eiver Sig_ l A 14 R1BN FIRST LVDS R_eiver Sig_l B 15 R1BP F_RS LVDS R_eiver Sig_l B 1 6 R1CN FIRST LVDS R_eiver Sig_l _ 17 RtCP HRST LVDS R_eiver Signal C 19 R1CLKN HRST LVDS R_ eiver Clock Si9_l 11 ...

Page 12: ...ver Sig_l C SECOND LVDS R_eiver Sig_l C 34 GND Ground SECOND LVDS R_eiver Cl_k Signal SECOND LVDS R_eiver Cl_k Signal 37 GND Ground SECON D LVDS R_eiver Sig_l _ SECON D LVDS R_eiver Sig_l D SECOND LVDS R_eiver Sig_l E 41 SECON D LVDS Receiver Sigr_l E 42 i on or GND 4 3 Resew_ t 1oconr_ion or GND 44 GND i i 45 GND Ground 46 GND Ground 48 VLCD Po _r Sup y i2_0V 4 Disassemble and assemble 12 ...

Page 13: ...2 Remove the four screw from the rear cover indicated with red line _3 Then remove the pedestal 4 4 Remove the Terminal Bracket 4 2Remove the Back Cover 1 Remove the seventeen screw indicated on figure above by red line 2 Then remove the back cover from the unit 1 Remove the six screw indicated on the figure above by red line 2 Then put the terminal bracket to the side 13 ...

Page 14: ...Then remove the power module 4 6 Remove the Main board Remove the two screw indicated on the figure above by blue line _Then remove the keypad module _1_ Remove the eight screw indicated on the figure above by the red line _2_Remove the Main board 4 7 Remove the remote control Remove the one screw take out the remote control board 14 ...

Page 15: ...lings Apartments Connect to wallantenna socket Walt Antenna Socket Bronze Wire RF Coaxial Wire 75 ohm I i _ _ i Turn ctockwiseto tighten _ Bronze Wire Be careful notto bend thebronze wire when connecting the antenna p p v qF_ 88 To improve the picture quality in a poorsignal area please purchase a signal amplifier and install properly If the antenna needs to be split fortwo TV s install a 2 Way Si...

Page 16: ...Vto the same channel number Connection Option 2 1 Connect theaudio and videocabtes from theVCR s output jacks to theTV input jacks as shown in the figure When connecting theTV toVCR match the jack colors Video yellow Audio Left white andAudio Right red If you connect a S VIDEO outputfrom VCRto the S VIDEO input the picture quality is improved compared to connectinga regular VCRto the Video input 2...

Page 17: ... the DVDaudio outputs tothe YPbPrAudio IN jacks onthe TV as shown in the figure 2 If your DVD onlyhas an S VlDEOoutput jack connect this to the S VIDEO inputon theTV as shown in the figure Note If yourDVD player does not have componentvideo output use S Video How to use 1 Turn on the DVD player insert a DVD 2 Use INPUTbutton on theremote control tosetect component mode 3 Press Play button on exter...

Page 18: ...e remote control to select COMPONENT VGAor HDMI source Signal COMPONENT HDMi 480i Yes Yes 480p Yes Yes 720p Yes Yes 1080i Yes Yes 1080p Yes Yes 0 Digital Set top Box Connecting a digital audio output Send theTV s audio to external audio equipment stereo system via the Digital Audio Output Optical port How to connect 1 Connect one end of an optical cable to theTV Digital Audio Optical Output port 2...

Page 19: ... sound as required Howtouse 1 Turnon thecomputerand theTV 2 UselNPUTonthe remotecontrottoselectVGAor HDMIsource 3 Check the image on your TV There may be noise associated with the resolution vertical pattern contrast or brightness in VGAmode If noiseis present changethe VGAmode to anotherresotution change therefresh rate to another rate oradjust the brightnessand contrast onthe menu untilthe pictu...

Page 20: ...lect Main source menu When the source device DVD playeror Set Top Box supports DVl How To Connect 1 Connect thesource device toHDMI portof this TV witha HDMI to DVI cable not supplied withthis product 2 Aseparated audio connection is necessary 3 If the source device hasan analog audio output connector connect the source device audio output to DVlAudio In port Iocatedon the leftside of HDMI port Ho...

Page 21: ...Cable sample HDMI Cable not supplied withthe product HDMI to DVl Cable not supplied withthe product Analog Audio Cabte Stereo to RCA type not supplied withthe product 21 ...

Page 22: ...bing the otherpeople in theroom Plug a setof headphones intothe 3 5mm mini jack socket onthe side panelof the set Power source Wider Hole and Blade AC Outlet TO USEACPOWERSOURCE Use theAC polarized line cord provided for operation onAC Insert theAC cord plug into a standard potarizedAC outlet Polarized AC Cord Plug 22 ...

Page 23: ... To scan quickly through channels press and hold down either In the MENU screen these buttonsserve as up downbuttons 5 POWER Press toturn on andoff theTV 6 USB rput Cor_eca USBfas drve ovewJPEG m_gesor ste_ o MP3sorgs 7 Av2 AUDIOJN Connect the audio L R cables fromthe video signalsource to these jacks 8 AV2WDEO iN Connects the compositevideo cable froman external signalsource to this jack 9 Headph...

Page 24: ... vdeo 5 VGA Audio In Connect the audio L R cables from a computer to this jack 6 VGA Video In Connect a video cable from a computer to this jack 7 VIDEO In Connects the video signal from a video device 8 Component Video In Connect a component video device to these jacks 9 AUDIO In Connect the audio L R cables from the video signal source to these jacks 10 S VIDEO In Connect the S Video cable from ...

Page 25: ...o and SAP in Analog mode Change the audio language in DTV mode 13 GUIDE Press to display the guide when you are watching analog or digital channels 14 CCD closed caption Select a closed caption 15 4DM Presstoseect_de cecor ectedto_he 4DM rput 16PC PFess oseect hece_putercor_eced o heVGA rput 17 Number buttons Press to change a channel 18 button Press to select digital channels For example to enter...

Page 26: ...7 Electrical parts 7 1 Block diagram T_E 5 A L L Y PB PE L R m m m MTK5380L MT8292 DO_ L_S YLAT T_L D_FLAY TPA3101 7 2 Circuit Diagram 26 ...

Page 27: ...TIAL VERSION 2007 04 09 V2 1 Change Vcore Voltage 2Add FB for DV33 and AV33 Reserve 3 Add R49 R50 for A version IC 4 Change C20 C21 for crystal capacitors 2007 06 11 5Add DRAM Serial resistors 6Add CEC uP 7 Add U16 MT8292 2007 06 11 HT5380 LQFP u13 o MT8292 T TP6 TEST CON2 NC C701 01uF Jl EM_ HAJER 234567891011121314 15 GND 24 7 8 9 10 13 _SVSSB 2 1 5 _SVSB S 9 5 2V 234S891015 SV 40PWRSB I0 _R_N 4...

Page 28: ...7 C0402 SMD 0 8 X 1 1_2K 1 2V 1 3 4 5 6 7 8 9 10 11 12 13 14 15 GND 1 3 4 5 8 9 10 15 5V 1 11 15 5VSB 1 4 7 8 9 10 13 3V3SB 7 DVl 0 6 MEM VREF 6 VTT 6J DDRV 4_7_9_14 DV33 3 5 8 9 10 13 AV33 DDRV DV33 100K 1 _R32 IC RT9199 DDR Termination SOP 8 100K 1 o VTT C CE6 C I_ F_ CE654 C _ 220uF 16v VTT FOR DDR TBP_MINATOR HEN VREF FOR DDR AND MT5381 VREF GND 5V 5VSB 3V3SB DV10 MEM VREF VTT DDRV DV33 AV33 1...

Page 29: ... SMD N_OUT_ A 1 3 SMD CE83 100uF 16V C100UF16V D 3H7 CO4O2 SMD t 3 SMD _ _ 7 AV25 _ 100uF 16V 1 25 x i_i00 i00 2 5V U9 9v I I 033sMD rER CE224 CBt97 C574 CB398 220uF 16Vy_ O luF i TC _ luF 0330UF1OV H7 I O4O2 SMD 1 Fo2 SMD O4O2 SMD AV25 o CE3O 100uF 16V f_ C100UF16V DI 3H7 U10 AZ1117 adj SOT223 SMD 3 IN _ OUT CB32 t Z0 1uF CO4O2 SMD AV12 1 RO603 SMD C575 O luF CE28 o_ L_F _ t _ _ sl_ R0603 SMD 1 2...

Page 30: ...PIO 0 RO6_3 _M_ ___ _ Q37 OSDA0 51_ J _I 4 2N3904 SOT23 SMD S_ _ 1 _EPROM 24018 Ns R_99 zzc ADDRgSS A0 SOP8 SMD R0603 C8 I 22pF C04O2 SMD HOLE GND H3 5V _ R77 NC 0R 3V3SB RO603 SMD _ R72 RO603 SMD i _ _ R20 CE37 1K 9 U2TX RO693 SMDR18 11_13 OPCTRL1 C229UF19WDSH11 _ 190 9R ORESET 7 11 PCTRL4 c 70PCTRL5 1 Q1 9 14 OSCL0 2N3904 9 14 OSDAO R22 RO693 SMD SOT23 SMDRO693 S D 7 GP OO D1 14 GP O 1 OPWM1 1N4...

Page 31: ...T_ C T 5V SVF CB1004 E31 NC _470uF 6v 220u_ SOL SDA NC NC AS F FAGC DF NC D_F _ GND GND GND GND rl DTV 8ADC GW41F2 DVT SADC GW4 F2 TP 2 _ USBOPWRERR SOT2S SMD _ os P_JS_ F AO3401 5V Q75 R2154 nanoSMDC 50F 20K RI206 SMD R2155 USBOPWREN Q76 2N3904 USB 5V U_B 5V R2028 4 i _ v_ 560R TUNER SCL 5 _ _ L i _ o T AGC 68K C696 C692 q Q _F A_C 33pF 33pF q DFAT _ TC0 02 _C0 02 SI _ _ _ _ V4 5V TUNER TUNER b_ ...

Page 32: ... NC VDD VREF NC VSS LDM UDM WE CLK CAS CLK RAS CKE CS NC NC A12 BSO All BS1 A9 A10 AP A8 A0 A1 VDD VSS 16M x 16 DDR TSOP 66 DDR 1 TSOP66 SMD 65 63 62 6O 59 57 56 54 51 4 47 46 45 44 41 46 39 36 37 36 35 ad RAI_A 22 MEM CLKEN R0603 SMD MEM _Q14 _wap for layout MEM MEM DQ13 MEM DQ12 MEM DQ11 MEM DQ10 MEM DQ9 MEM DQ8 MEM DOS1 MEM VREF MEM DQMI MEM CLK0 MEM CLK0 MEM CLKEN MEM ADDR12 MEM ADDR11 MEM ADD...

Page 33: ...2 DI _ TP183 11 R60 R61 TP104 CNB2 R62 R0603 SM UOTX _100 2_ FOR CODE DOWNLOADAND DEBUGGING PH3 4A SIP 4P_2 OA U131 VCCK VCC210 VCCK VCC210 VCCK VCC210 VCCK VCC210 VCCK VCC210 DVDD10 VCC210 DVDD10 VCC210 VCCK VCC210 VCCK VCC210 VCCK VCC210 E_PAD E_PAD VCC310 3 E PAD VCC310 3 E PAD VCC310 3 E PAD E PAD E PAD E PAD E PAD MT5380 SMD LQFP LQFP256 SMD 5388 9 DDRV U DV33 DV33 R1 5 NC 4 TK OPWM2 4 7K 1 8...

Page 34: ..._ HDMII RXC 21 _11_ HDMII RX0 D21_ _ HDMII RX0_ ESD 0402 015pF D21_ _11_ HDMII RX D21_ _11_ HDMII RX2 D22_ _ HDMII RX2 ESD O4O2 015pF n q N m n 74 _1_ _ vcc BRXCM BRXCP vss BRXOM BRXOP vcc BRXIM BRXIP vss BRX2M BRX2P vcc ARXCM ARXOP vss ARXOM ARXOP vcc sv R2079 _ R2080 47K 47K R2081 100 GPO 7 1oo OPWR0 5V o OSDA1 0 OSCLI Do AW3 HDMI OK NC AV33 HDM_ U8 ATb354 3FPIO0 CRX2M vss _ 1 ORXIP CRmM VCC ORX...

Page 35: ... _0_03 SMD CNE4 MS0 PREST ADIN4 R2105 00 U MS0 CLK VCXO U AOMCLK _1U1 MS0 PWN _ M80_NTO OPWMON21US_ PH_6_NC S_P_P 2 0A 5V 0 I I A7P A7N A6P A6N TP65 ASP CNE3 _ A4p LVDS OUT QF3 FB12 _ _ FB nc _ VDSVD 10K ___ L153 01UF RI206 SMD 220uF 16V 0 luF C 603 SMD SMD SOPS PI_0UFI6V_H9 C0402 SMD 2K IF Q67 R125 5t K R126 NC Qg 2N7002 CB455 NC IF OF3 RI25 lK RI26 47K Qg 3904 CB455 luF ROG03 SMD D6 DV33 SVR3_1 ...

Page 36: ...SMDLeFP LQFP2S6 SMD SSSOa PRO_N Av12 Y eND D12 I DE_ MGP_O2 _2_2MGP_O2 14 YPBPROLIN R152 YPBPROR N DVD 1 1 C592 il _ il 4 R1_4_ CE_47 _OS SMD CE_48 II II IOUF 1OV R164B IOUF 1OV AVSS DI III Avss IR1848 _ 1oK 36 _ Ii 4 _ESD_o2 IO_ D192 _ESD_O2 IO_F C_O2_SMD R_OS SMD CNC4 _HS SA W SI_3_20 HAIER _l__us_lnw_lnVn DVDL IN DVDL IN 14 DVD DVBT USBLf _ 14 DVD DVBT USBR N _ DVD R _1 ...

Page 37: ...R92 R101 10K 1K R0603 SM R93 10K UTX URX VGASCL IN _ Q_3904 R100 10K OPCTRL4 NEARLY IC soG 68 163 10nF C132 GP ___100 166 10nF C135 G N 68 169 10nF C136 R0_ISM D BP ___100 172 10nF C139 BN 68 174 10nF C140 R0_ISM D RP 1 2 3 4 5 6 7 8 9 10 12 13 14 15 GND GND R186 100 I N_R0603 SM D31 ESD 0402 t0pF C0402 SMD I I 5VSB 1 2 15 5VSB SOG 10 SOG GP 10 GP 10 GN GN 10 BP BP 10 BN BN 10 RP RP RN 10 RN VSYNC...

Page 38: ...15_4 27 R1525 C460 O146 47 47pF ESO 0402 0pF R0603 SMD C0402 SMD C0402 SMD sY1 _N R15_7W27 D145 R1562 C459 147 T C0402 SMD R0603 SMD C0402 SMD scl N R15_8 _A_ 27 ESD 0402 0pF 47 _47pF C0402 SMD R0603 SMD 2 SMD AV25 _ FB DVDD25 VADC BEAD MD 0603 2 _F CB162 T _ Dvss2s VAOC C0402 SMD AV25 FB44 FB __M_ AVDD25c5821uFVADC T O_F AVSS25 VADC C0402 SMD AV25 _FB4b_m FB AVDD25 REF BEAD MD 0603 2 _F CB165 T _...

Page 39: ...o17o 100uF 18V C04O2 SMD 0 1uF C109UFI 3H7 AVSS83 AAD C0402 SMD AV33 FB _____Kmr FB REFP AADC BEAD MD 0603 1 __M C204 IuF C8174 T CO4O2 SMD I O IuF REFN AADC C9492 SMD 7 HPDET R324p_ N _0 GPIO 4 R0603 SMD AV33 1 2 3 4 5 6 7 8 9 10 11 12 14 15 GND FB AVDD33 ADACO 1 2 11 15 5VSB BEAD MD 0603 1 C202 IuF CB171 T CO4O2 SMD I O luF AVSS33 ADAC0 C9492 SMD AV33 FB p ___fmf_ FB AVDD33 ADAC1 BEAD MD 0603 1 ...

Page 40: ... z uF Z Z CE 4 R ovss o 8 8 _ _ _ _ o co4o2_s o coso_s o qSl v R68 _RI 5 _U_U3 _MU C56 R281 MUTE R D D202 oP O __ T MT DW3 a 681 _ AL2 0805 SMD IC0805 SMD E N illcoso_ sr 4o f _ _ lcoso_ sr 4o ov33 R65 7170 OuF 63v R55 470 C649 OuF 63V ALl R0603 SMD 71 0uF 63V R57 470 C650 0uF 63V AR1 R1645 47K 1Ok R1647 c_ I0 DVD DVBT USB R N _ DVD R N I CS0 _ uF _1 C0402 SMD _ AV3R N HPUL _ CE21 df 47UF 6V R91 N...

Page 41: ...AMP VN_6fl3 S_D 4701470 01_71p t R1783 N _D C04 AR1 47K R1779 RO603 SMD 4 7K C060_ SMD R1771 47K RO603 SMD TPl05 TPI06 TP_07 CNC Speaker U rJCS 4A TP28 SCP4P 25A rESTCOPPER Speark out TEST FB72 150 Ohm 2A 6 MD OPW pvD t_ _ _ C220UFIOWD63H7 12V 4 GPO 8 4 OP O 8 C689 047UF 50V L146 33UH 2A _D_ker L AR1 1314 ALl To luF 50V I4 MUTE _ MUTE _7 7CALL5 A 10UWAMP _ A_UT_AMP Audio AMP All capacitor must be ...

Page 42: ...cument number AT08SR0415US12 Export country American Customer HAC _ AC Ha i Pov pp modoi LVD8 Connector _ 01 Y J J W r k _i _ i 7 i ti_ 0 l P c h m iserqot i D i i power wire L J LVDS Wire _ _i _ i_ ri IR Wire 4_ i i Speaker Connecting Wire _ i i Amplifier power wire o_ i keypad Wire Backlight Wire Combine Wire J we 3 42 ...

Page 43: ...en input 8893 Finished these operations system will be into the factory mode menu 8 1 2 How to exit IF want to exit this factory menu please press the botton Exit in the remoter 8 2 Measurements and Adjustments 8 2 1 Version S N Panel Resoution Version The first line is the model Name and the second line is current software version 43 ...

Page 44: ...hen we found the color in the two models was abnormal Then we can use the function to adjust it automatically Color Temperature The function could adjust the Color Temperature used when debugging 8 2 3 Audio Dolby Banner When turn it ON the model will be in Dolby authentication state 44 ...

Page 45: ...wnmix outputmodel MTSSystem usedwhendebugging The parameters only usedwhen debugging noneedto be modified 8 2 4 Channel Range Scan The function could make it to search the channels by differentiation the analog and digital channels Single RF Scan Search channels in the frequency scope set in advance 45 ...

Page 46: ...TENNA DIGITAL CABLE ANALOG CABLE DIGITAL to searchchannels usedonlyin projectdebugging TunerDiagnostic Projectdebuggingsetting usedto inspecttheaudiofunction 8 2 5Gamma Gamma Bright GAMMA0 8 Middle defaultsettingsinthe program Dark GAMMA1 2 46 ...

Page 47: ...st the backlight 8 2 7 Function Burning Mode Turn it ON to enter the aging model This is for factory run in testing The screen would display red green blue and black screen repeatedly Each color screen could be exam at that time 47 ...

Page 48: ...CleanStorage Thefunctioncouldmakethe modelturnbackto the factorydefaultsetting 48 ...

Page 49: ...l input to TV input Restart the television of power supply is interrupted Press Mute button and verify if Mute mode is set Switch to otger channel and verify if the same problem happens Press VOL button to see of he problem can be solved Verufy if sound system is correct Refer to some chapter for adjust Verify if correct channel is selected Adjust the antenna Make adjustments by Fine Tune and MANU...

Page 50: ...k FI and peripheral power supply F1 is damaged I N Y Check p wez supp y net fol low FI N Y Check E33 470 p F 16V for 5V Tu Fn on the TV set By button o F emote cont Fol I Y Check U6 MCU 1 Power supply U7 U9 2 Reset signal 3 Crystal x I Change U1 MP1410ES LF or D 17 S K34A S MA Check U1 fo F 5V output yt i check 47 I It s normal but the 1 I voltage is high I CheckPinN 4 f II U1 MP1410 ES or change ...

Page 51: ...ard failure check State No Sound No Sound All Mode 1 ail _Fail Fail Fail Fail 51 I I Change Source input Re soldering or change IC U13 Re soldering or change IC U55 Re soldering or change IC U2 Change the Speaker ...

Page 52: ...State No picture No Raster on Panel ail Fail Fail Fail t v Change the backlight B D Re soldering or change IC UA1 and RNA1 17 Re soldering or change IC U13 Change the Panel wire I 52 ...

Page 53: ...ething electric enter into LCD Mis align between TCP and Panel Panel failure TCP failure Phenomena C ACF bnding _nd P_ Failure Mode Part Name Description Phenomena Failure cause Panel or Polarizer Dot Defect Polarizer Bubble Polarizer Scratch F M inside Polarizer Bright dot dark dot in pannel Bladder in Polarizer Polarizer Scratch Eyewinker inside Polarizer D_k Dot Incoming Inspection Standard Bla...

Page 54: ...nce Capacitance improper bring crosstalk inside LCD pannel 1 Chip lose action 2 IC short or jointion bad 3 Pannel and vsc connect bad Failure Mode Part Name Description Phenomena Failure cause When turn Mechanical Caused by Mechanica noise of backlight panel appear Noise unit cacophony Ripple B L off B L dark B L wire damaged Connectric circle B L lose action B L brightness darker than normal B L ...

Page 55: ...itween lamp housing and wire Because consume power too much F M in B L unit Failure Mode Part Name Description Phenomena Failure cause Mechanical or B L Light leakage Uniformity Mount hole Brightness at bottom of LCM brighter than normal B L brightness asymmetric Lack screw or screw damage B L unit badness Sheet in B L unit is uneven Lack screw Screw damage 55 ...

Page 56: ...Sincere Forever 56 ...

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