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AWA MHDV2245-O3-D0, Service Manual

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AWA MHDV2245-O3-D0 Service Manual Download Page 9

- 08 -

  Service Manual

  Model No.: 

3. Location of Controls and Components

3-1 Board Location

No.

Description

A  Board

Main Board

B  Board

Power Board

3-2 Main  Board

A  Board

B  Board

515C3206M01

514C2415M01

LVDS WIRE

30433920301

Summary of Contents for MHDV2245-O3-D0

Page 1: ...warnings or cautions to advise non technical individuals of potential dangers in attempting to service a product Products powered by electricity should be serviced or repaired only by experienced professional technicians Any attempt to service or repair the product or products dealt with in this service information by anyone else could result in serious injury or death WARNING MHDV2245 O3 D0 ...

Page 2: ...e and Assemble 4 1 Remove the Pedestal 6 8 8 8 8 11 12 15 15 4 2 Remove the Back Cover 15 4 3 Remove the Adhesive Tape 15 4 4 Remove the Power Module 16 4 5 Remove the Main Board 16 4 6 Remove the Speaker 17 4 7 Remove the Remote Control Board 17 5 Installation Instructions 18 5 1 External Equipment Connections 18 5 2 HDMI Connections 21 6 Operation Instructions 24 6 1 Front Panel Controls 6 2 Bac...

Page 3: ...le Check 50 10 2 Main Board Failure Check 10 3 Panel Failure 51 58 9 DVD OPERATION 45 9 2 DVD Trouble Shooting 49 8 1 How to enter into the factory model 8 2 How to update software 42 43 8 Measurements and Adjustments 39 8 2 How to enter into the hotel model 44 ...

Page 4: ...ctions in the literture accompanying the appliance 1 3 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 placed on top of or above the TV 1 3 3 Electro static discharge ESD Some ...

Page 5: ...eiver only the test fixtures specified in this service manual CAUTION Do not connect the test fixture ground strap to any heat sink in this receiver 3 Do not spray chemicals on or near this receiver or any of its assemblies 4 Unless specified otherwise in this service manual clean electrical contacts only by applying the following mixture to the contacts with a pipe cleaner cotton tipped stick or ...

Page 6: ...atic electricity Such components commonly are called Electrostatically Sensitive ES Devices Examples of typical ES devices are integrated circuits and some field effect transistors and semiconductor chip components The following techniques should be used to help reduce the ncidence of component damage caused by static by static electricity 4 Use only an anti static type solder removal device Some ...

Page 7: ...bed in the table below Note A note provides information that is not indispensable but may nevertheless be valuable to the reader such as tips and tricks Caution A caution is used when there is danger that the reader through incorrect manipulation may damage equipment loose data get an unexpected result or has to restart part of a procedure Warning A warning is used when there is danger of personal...

Page 8: ...View Color Display No of Preset Channels 400 OSD Language English Color System PAL SECAM Audio System DK BG I M L L Audio Output Power Built in W 3W 2 Audio Output Power outer W No Total Power Input W 22 8W Voltage Range V DC 12V Power Frequency Hz 50 60Hz Net Weight KG Gross Weight KG 5 2 Net Dimension MM 535 165 390 Packaged Dimension MM 610 92 440 3 9 ...

Page 9: ...vice Manual Model No 3 Location of Controls and Components 3 1 Board Location No Description A Board Main Board B Board Power Board 3 2 Main Board A Board B Board 515C3206M01 514C2415M01 LVDS WIRE 30433920301 ...

Page 10: ...2 ADJ 3 BK ON OFF 4 5V 5 POWER ON OFF 6 5VSTB 7 5V 8 5V 9 GND 10 GND 11 GND 12 12V Notes J2 Pin 3 Backlight on off The system can turn on or turn off the backlight of TFT LED Panel through the power supply unit path J2 Pin 5 System power on standby System board will use this pin to control system power J2 Pin 2 Control the luminance of backlight The system can generate the PWN signal to control th...

Page 11: ...in number Signal name Description 1 LED_R LAMP RED 2 LED_G LAMP GREEN 3 4 IR REMOTE CONTROL 5 GND GND 6 5V POWER FOR REMOTE KEY1 KEY0 GND 7 8 9 10 NC STANDBY Speaker connectorJ26 Pin number Signal name Description 1 RSPK RSPK 2 RSPK RSPK 3 LSPK LSPK 4 LSPK LSPK ...

Page 12: ...power for Main board Panel 3 3 2Connectordefinition Service Manual Model No 11 CN2 Pin number Signal name 1 GND 2 ADJ 3 BK ON OFF 4 5V 5 POWER ON OFF 6 5VSTB 7 5V 8 5V 9 GND 10 GND 11 GND 12 12V Pin number Signal name CN1 1 2 3 4 12V 12V GND GND 13 12V ...

Page 13: ...efinition CLAA215FA04 V4 PIN NO REMARK FUNCTION 1 RXO0 minus signal of odd channel 0 LVDS 2 RXO0 plus signal of odd channel 0 LVDS 3 RXO1 minus signal of odd channel 1 LVDS 4 RXO1 plus signal of odd channel 1 LVDS 5 RXO2 minus signal of odd channel 2 LVDS 6 RXO2 plus signal of odd channel 2 LVDS 7 GND GND ...

Page 14: ... GND GND 18 RXE2 minus signal of even channel 2 LVDS 19 RXE2 plus signal of even channel 2 LVDS 20 RXEC minus signal of even clock channel LVDS 21 RXEC plus signal of even clock channel LVDS 22 RXE3 minus signal of even channel 3 LVDS 23 RXE3 plus signal of even channel 3 LVDS 24 GND GND 25 NC NC 26 NC Test pin Can t connect to GND 27 NC NC 28 VCC Power supply input voltage 5 0 V 29 VCC Power supp...

Page 15: ...hat rear cover faces upward Remove the one screw from the rear cover indicated with Then remove the pedestal 4 2Remove the Back Cover Remove the these screw indicated on figure above by Then remove the back cover from the unit Service Manual Model No 15 4 1 Remove the Pedestal 4 3 Remove the adhesive tape ...

Page 16: ...igure above by Then put the terminal bracket to the side 4 4 Remove the power module Then remove the power module Disconnected the coupler J20 J2 J28 J26 Remove the Main board Service Manual Model No 16 CON2 J10 J11 4 5 Remove the Main board ...

Page 17: ...4 7 Remove the speaker Take out the speaker 4 8 Remove the remote control Remove the screw take out the remote control Service Manual Model No 17 ...

Page 18: ... cable not included to the ANT IN jack on the back of your TV DVD combo then connect the other end of the cable into the antenna or cable TV wall outlet To improve picture quality from an antenna in a poor signal area install a signal amplifier If you need to split the antenna signal to connect two TVs install a two way splitter Service Manual Model No 18 ...

Page 19: ...Service Manual Model No 19 INSTALLATION ...

Page 20: ...5 unbalanced 6 STEPS PC Be sure both the TV and computer are set to Power off 1 Connect VGA and audio cable 2 Connect the power cord 3 Power on the TV switch to PC mode 4 Power on the PC This sequence is very important HDMI1 USB PC AUDIO VGA RF SCART COMMON INTERFACE CI PRESET MODE ...

Page 21: ... menu When the source device DVD player or Set Top Box supports DVI How To Connect 1 Connect the source device to HDMI port of this TV with a HDMI to DVI cable not supplied with this product 2 A separated audio connection is necessary 3 If the source device has an analog audio output connector connect the source device audio output to DVI Audio In port located on the PC port How To Use If the sour...

Page 22: ...Cable sample HDMI Cable not supplied with the product HDMI to DVI Cable not supplied with the product Analog Audio Cable Stereo to RCA type not supplied with the product Service Manual Model No 21 ...

Page 23: ... the attached power cord only If the polarized AC cord does not fit into a non polarized AC outlet do not attempt to file or cut the blade It is the user s responsibility to have an electrician replace the obsolete outlet If you cause a static discharge when touching the unit and the unit fails to function simply unplug the unit from the AC outlet and plug it back in The unit should return to norm...

Page 24: ...urn the unit ON from STANDBY mode Press it again to turn the set back to STANDBY Service Manual Model No 23 3 1 2 Front control panel 1 2 3 Remote control sensor Indicator LED BLUE POWER ON RED STAND BY Key board Rear Side Sockets 1 SOURCE Displaytheinputsourcemenu MENU Displaymain MENU 3 4 CH CH InTV mode press CH or CH t o change the channel up and down In MENU press CH or CH t o select items In...

Page 25: ...6 3 Setting Up Your Remote Control Service Manual Model No 24 Remote control 03 BUSH Full HD 1080p LED LCD TV User Manual Helpline 0845 604 0105 21 ...

Page 26: ......

Page 27: ...7 Electrical parts 7 1 Block diagram Service Manual Model No 26 MSD306 1517 1 2 ...

Page 28: ...B0N RX2BCLKP RX2BCLKN DDC2BSCL DDC2BSDA HDMI_E_CEC RX3B2P RX3B2N RX3B1P HOTPLUG2 RX3B1N RX3B0P HOTPLUG3 RX3B0N RX3BCLKP RX3BCLKN RX2B2P DDC3BSDA RX2B2N DDC3BSCL Page 7 07_PCMCIA OTG_DM OTG_DP OTG_DP1 OTG_DM1 USB_DETEC1 ON_USB1 TSSTART TSVALID TSCLK TS_MDI 7 0 TS_D 7 3 TS_CLK TS_MOSTART TS_MOVAL PCM_D 7 0 PCM_A 14 0 PCM_IRQA_N PCM_CE_N PCM_IOWR_N PCM_IORD_N PCM_WE_N PCM_OE_N PCM_REG_N PCM_WAIT_N PC...

Page 29: ...V C163 470uF 16V C152 100uF 16V C152 100uF 16V C134 NC 0 1u C134 NC 0 1u C159 1nF C159 1nF R274 1K R274 1K C131 220uF 16V C131 220uF 16V C143 0 1u C143 0 1u C121 0 1u C121 0 1u R282 4 7K R282 4 7K C138 0 1u C138 0 1u C151 0 1uF C151 0 1uF C150 100uF 16V C150 100uF 16V C148 0 1u C148 0 1u R278 100K R278 100K C126 100uF 16V C126 100uF 16V C124 0 1u C124 0 1u C133 0 1u C133 0 1u C144 0 1u C144 0 1u C...

Page 30: ...6 NC FB 1206 R415 NC 100K R415 NC 100K R386 NC 15K R386 NC 15K U19 TPA1517 U19 TPA1517 IN1 1 SGND 2 SVRR 3 OUT1 4 PGND 5 OUT2 6 VCC 7 M SB 8 IN2 9 GND HS 10 GND HS 11 GND HS 12 GND HS 13 GND HS 14 GND HS 15 GND HS 16 GND HS 17 GND HS 18 GND HS 19 GND HS 20 L81 NC FB 1206 L81 NC FB 1206 R355 NC 0R R355 NC 0R C217 NC 1000pF C217 NC 1000pF C242 NC 100n C242 NC 100n C197 NC 1uF C197 NC 1uF C225 NC 100...

Page 31: ... AO3407 1 3 2 C17 100uF 16V C17 100uF 16V Q4 NC 2N3904 Q4 NC 2N3904 3 2 1 C22 0 1uF C22 0 1uF R15 4 7K R15 4 7K R21 0R R21 0R R17 4 7K R17 4 7K C20 0 1uF C20 0 1uF L57 FB_56_OHM_4A L57 FB_56_OHM_4A C5 470uF 16V C5 470uF 16V R5 NC R5 NC C6 0 1uF C6 0 1uF C11 0 01uF C11 0 01uF R7 10K R7 10K R11 10K R11 10K R408 NC 0R R408 NC 0R C23 0 1uF C23 0 1uF R22 10k R22 10k C7 1nF C7 1nF J25 NC INVERTER J25 NC...

Page 32: ...C30 NC 0 1uF C34 NC 33pF C34 NC 33pF R48 330R R48 330R C54 100pF C54 100pF R34 10K R34 10K J27 SCART_24 J27 SCART_24 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 10 10 11 11 12 12 13 13 14 14 15 15 16 16 17 17 18 18 19 19 20 20 21 21 23 23 22 22 24 24 25 25 26 26 R30 10K R30 10K C41 47n C41 47n J5 PC Audio Input J5 PC Audio Input 1 2 3 4 5 6 7 8 Q9 2N3904 Q9 2N3904 3 2 1 RX7 NC V800AA RX7 NC V800AA C50 100...

Page 33: ... V800AA L66 FB_11_OHM_500MA L66 FB_11_OHM_500MA C80 10uF C80 10uF RX19 NC V800AARX19 NC V800AA L64 FB_11_OHM_500MA L64 FB_11_OHM_500MA R65 10K R65 10K R98 33R R98 33R R66 33R R66 33R J8 NC Audio J8 NC Audio 1 1 2 2 9 9 3 3 8 8 4 4 5 5 7 7 6 6 RX18 NC V800AARX18 NC V800AA R78 NC R78 NC C65 1nF C65 1nF R67 10K R67 10K C63 47nF C63 47nF C79 0 1uF C79 0 1uF R89 100K R89 100K R77 NC R77 NC R107 0R R107...

Page 34: ... NC V80010 RX35 NC V80010 R112 22K R112 22K C92 0 1u C92 0 1u RX46 NC V80010 RX46 NC V80010 RX22 NC V80010 RX22 NC V80010 D3 BAV70L D3 BAV70L 1 2 3 R120 NC 100R R120 NC 100R RX25 NC V80010 RX25 NC V80010 J15 DIP 20 2 10 J15 DIP 20 2 10 1 1 3 3 5 5 7 7 9 9 11 11 13 13 15 15 17 17 19 19 2 2 4 4 6 6 8 8 10 10 12 12 14 14 16 16 18 18 20 20 R115 1K R115 1K D4 BAV70L D4 BAV70L 1 2 3 R124 22K R124 22K R1...

Page 35: ...100nF CS30 NC 10nF CS30 NC 10nF RS6 NC 1M RS6 NC 1M R138 NC 2 2K R138 NC 2 2K F1 U4 NC MXL301RF F1 U4 NC MXL301RF LNA_IN 2 AS 6 IDAC 3 VDD_DNX2 1 VBATT_A3 4 VAGC2 5 VBATT_A5 7 XTAL_N 8 XTAL_P 9 CLK_OUT 10 GND_XTAL 11 VREG_A_OUT1 12 VDD_DNX1 31 TF_2 30 TF_3 29 VREG_A_OUT2 28 VBATT_A2 27 VAGC1 26 NC 23 VBATT_A1 13 SCL 14 SDA 15 IF_OUTP 25 VDD_IO 16 GND_DIG 17 VREG_D_OUT 18 VREG_D_IN 19 VBATT_A4 20 V...

Page 36: ...DIA CO LTD DESIGN YANXUEWU MODEL MSDV3205 L2 TITLE PCMCIA CHECKED PART NO DWG NO APPRD SHEET 7 OF 12 VER 1 0 R411 10K R411 10K 1 2 F2 NC NSMD050 F2 NC NSMD050 J16 PCMCIA_CNT J16 PCMCIA_CNT GND 1 D3 2 D4 3 D5 4 D6 5 D7 6 CE1 7 A10 8 OE 9 A11 10 A9 11 A8 12 A13 13 A14 14 WE 15 READY 16 VCC 17 VPP1 18 MIVAL 19 MICLK 20 A12 21 A7 22 A6 23 A5 24 A4 25 A3 26 A2 27 A1 28 A0 29 D0 30 D1 31 D2 32 WP 33 GND...

Page 37: ...D_TS1_CLK Y20 PAD_TS1_SYNC R16 PAD_TS1_VLD W20 PAD_TS1_D 0 P18 PAD_TS1_D 1 R18 PAD_TS1_D 2 T18 PAD_TS1_D 3 W19 PAD_TS1_D 4 Y21 PAD_TS1_D 5 Y19 PAD_TS1_D 6 R21 PAD_TS1_D 7 T21 PAD_TS0_CLK U19 PAD_TS0_SYNC K19 PAD_TS0_VLD P20 PAD_TS0_D 0 K20 PAD_TS0_D 1 L20 PAD_TS0_D 2 M20 PAD_TS0_D 3 T14 PAD_TS0_D 4 U15 PAD_TS0_D 5 U13 PAD_TS0_D 6 T12 PAD_TS0_D 7 U18 PAD_IP W1 PAD_IM Y1 PAD_TGPIO0 RF_AGC_CTRL AA4 P...

Page 38: ...3 75RX4 7 5 3 1 8 6 4 2 RP16 22RX4 7 5 3 1 8 6 4 2 RP16 22RX4 R267 10k R267 10k 7 5 3 1 8 6 4 2 RP20 75RX4 7 5 3 1 8 6 4 2 RP20 75RX4 7 5 3 1 8 6 4 2 RP22 22RX4 7 5 3 1 8 6 4 2 RP22 22RX4 R268 10k R268 10k 7 5 3 1 8 6 4 2 RP21 22RX4 7 5 3 1 8 6 4 2 RP21 22RX4 C119 1n C119 1n 7 5 3 1 8 6 4 2 RP25 75RX4 7 5 3 1 8 6 4 2 RP25 75RX4 7 5 3 1 8 6 4 2 RP27 75RX4 7 5 3 1 8 6 4 2 RP27 75RX4 7 5 3 1 8 6 4 2 ...

Page 39: ...e 1 2 3 4 5 Connection Wire For Keyboard and Remote Connection Wire For Speaker LVDS Wire Connection Wire Power For Mainboard 5 2 3 4 1 38 6 6 Connection Wire Power For DVD Mainboard Connection Wire For DVD Mainboard 7 7 Connection Wire 12V input for power board ...

Page 40: ...ll be disappear after auto tuning After auto tuning the channel will turn to the first DTV channel 2 DTV Manual tuning You can select a DTV channel then find the program in this channel Pls press to select the channel then press OK to search the programs NOTE Bad Normal Good means signal intensity Switzerland NewZealand Norway Poland Portugal Slovenia Spain Sweden Country OK Rumania Russian Serbia...

Page 41: ...CI card s information MENU Picture Mode Standard Contrast 82 Brightness 50 Color 50 Sharpness 50 Tint 50 Color Temperature Medium Red 40 Green 31 Blue 50 MENU Rename Only can rename ATV programs Move the cursor to the program press teletext green button to rename the program Press to choose the character Press to move the cursor Press MENU button to exit edit Press EXIT to exit the menu Note ATV p...

Page 42: ...ish Country UK Set Password Lock System LOCK Block Program Parental Guidance Off 7 EPG Menu Electronic Program Guide The EPG menu is used to look at what is being broadcasted on DTV or Radio channel in the day To access the EPG menu press the EPG botton the following menu will be displayed 28 Apr 04 39 800 SZTVM01 No Information 801 SZTVM02 802 SZTVM03 803 SZTVM04 804 Date No Information No Inform...

Page 43: ...ust the color temperature and white balance of each signal source 4 SSC to adjust the spectrum for passing the EMC test 5 special set 1 2hour off for Aging test 2 WDT watch dog 3 white pattern set pure color output for the panel used at the checking and aging test for panel 4 reset 5 set the recorder 6 set power on screen display 6 QMAP adjust adjust color quality 7 PEQ set sound EQ 8 sw informati...

Page 44: ... Upgrade Haier MTK5363 FW upgrade with USB SOP Step 1 Ready for F W Upgrade 1 1 Change the software file name to upgrade pkg eg Before change After change 1 2 Prepare a USB memory The file system of USB memory must be FAT16 or FAT 32 1 3 Copy the file upgrade pkg from your computer to the USB memory and remove it from computer s USB port Note 1 Note the version of this F W is V2 03 before you chan...

Page 45: ...hannel 6 Start Menu Display 7 Input Source Change 8 Save to USB 9 Loaking 10 Volume Default Hotel mode switch Panel key lock Hotel mode can adjust the maximum volume Hotel mode locking TV signal source Hotel mode locking program channels Hotel Mode menu is displayed Hotel mode is to display the Source U disk data will be cloned into the machine TV related equipment will be copied to the system U d...

Page 46: ... owned by Macro vision Corporation and other rights owners Use of this copyright protection technology must be authorized by Macro vision Corporation and is intended for home and other limited viewing uses only Unless otherwise authorized by Macro vision Corporation Reverse engineering or disassembly is prohibited The product complies with the KODAK Picture CD format and will display KODAK Picture...

Page 47: ...f the current playing disc 21 22 GOTO For DVD discs press to choose the desired title and chapter and search the desired title time and chapter time For Super VCD VCD CD discs press this button to search the desired disc time and track time and choose the desired track Note During VCD playback the PBC mode must be set to OFF 24 OK Press to confirm 31 ANGLE Press to view scenes shot from different ...

Page 48: ...title optional Note Not all players support this item SYSTEM SETUP Aspect Ratio Select the aspect ratio Notes TV System Select the different TV system For more information of output format refer to the instructions or your TV set RATING SETUP Select Rating in the setup menu and display the Rating submenu The image display ratio is related to the recorded disc format Some disc can not display image...

Page 49: ...elled by toggling to a different Mode Option Press Direction key to choose the root directory and then press OK button to enter into the sub directory Press Direction key to choose the desired picture and then press OK or PLAY to enjoy the picture If you want to return to the upper menu press Direction key to choose the icon and press OK button Image rotation In picture play state press Direction ...

Page 50: ...D DISC DISPLAYED Ensure the disc is not warped damaged or deformed Ensure the disc is not badly stained or damaged Ensure the disc format is compatible with the player Please check whether you have tried to play a software CD If so please restart the player REMOTE NOT WORKING Make sure the Main unit s POWER button is on Ensure the remote batteries are working Point the remote control directly at t...

Page 51: ...Service Manual Model No 50 10 Trouble shooting 10 1 Simple check ...

Page 52: ...e Manual Model No 10 2 Main board failure check 1 Black creen 2 White screen 6 J2 11 8 11 on VCC pins of J20 Check if Q1is working Check if J20 is Signal on J20 Check Q5 Q6 and the 5 Is power LCD normal J2 51 ...

Page 53: ...Service Manual Model No 52 3 Panel display abnormally connector j20 is at normal level ...

Page 54: ... Check the speakers Y N Check if there is output at J26 Check if there is 12V input at PIN7of U19 Check if the power supply system is damaged short circuit or mis connected N Y Check if MUTE PIN of U19 is low voltage Check the volume control circuit from R302 U19 Y N Check if there is signal input at PIN3 PIN12 of U19 Check the volume input circuit from U8 to N Y Replace U19 U19 ...

Page 55: ...t PIN6 of U2 N Y Y Y N Check the power supply circuit to this PIN Check if there is intermediate frequency signal output at PIN12 of U2 Check if there is I2C signal at PIN4 PIN5 of TUNER1 Check the I2C circuit between U8and U2 Check the tuner Check the signal circuit between U8 and U2 Fix the RF set N 5 TU TU TU ...

Page 56: ...Service Manual Model No 6 HDMI no picture or picture abnormal If J13 is R111 R112 R113 R114 R116 R117 Q11 Q12 55 ...

Page 57: ...Service Manual Model No 56 7 PC no picture or picture abnormal ...

Page 58: ...Service Manual Model No 8 YPBPR AV SCART no picture or picture abnormal Check Y 57 ...

Page 59: ... or cracking Dim or L D TCP Sunken TCP lead cracking ACF bonding short Awful environment and something electric enter into LCD Mis align between TCP and Panel Panel failure TCP failure V Dim Vertal gray line V L D Vertical color line light or dark forever H B D Horizontal bar H Dim Horizontal gary line H L D H o r i z o n t a l line light or dark forever ...

Page 60: ...er Bubble Bladder in Polarizer Bladder between Polarizer and top glass Polarizer Scratch Polarizer Scratch Tine or rigidity arose F M i n s i d e Polarizer Eyewinker inside Polarizer Eyewinker inside Polarizer Circuit Abnormal Display Abnormal Display 1 Chip lose action 2 IC ahort or jointiog bad 3 Pannel and vsc connect bad Flashing B r i g h t a n d d a r k display alternately 59 ...

Page 61: ...display Maybe caused by surge current and EDS Black Screen B L normal only Black screen display FIIcker Crosstalk LCD Vcom imbalance Abnormal Color Only color abormal Capacitance improper bring crosstalk inside LCD pannel Abnormal Color Only color abnormal 1 Chip lose action 2 I C s h o r t o r jointion bad 3 Pannel and vsc connect bad ...

Page 62: ...ss between wire and electrode B L dark B L brightness darker than normal Connect badnessShort between wire and electrode B L wire damaged B L wire damaged Operation abnormal or systemic noise B L wire open Without backlight Operation abnormal or systemic noise B L shut down B L shutdown in sometime Short bitween lamp housing and wire Because consume power too much F M F M inB L white balck Rotundi...

Page 63: ...ription Phenomena Failure cause Mechanlcal or B L Light leakage Brightness at bottom of LCM brighter than normal B L unit badness Uniformity B L brightness asymmetric Sheet in B L unit is uneven Mount hole Lack screw or screw damage Lack screw Screw damage ...

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