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LCD COLOUR TV 

SERVICE MANUAL 

MODEL:  

LTC-26N680HCP 

LTC-32N680HCP 

LTA-32N680HCP 

LTA-32N658HCP 

 

CHASSIS NO.: LS02/PS02  

 

 

 

 

 

 

 

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Содержание LTA-32N658HCP

Страница 1: ...LTA 32N658HCP LTA 32N680HCP LTC 26N680HCP LTC 32N680HCP...

Страница 2: ...LCD COLOUR TV SERVICE MANUAL MODEL LTC 26N680HCP LTC 32N680HCP LTA 32N680HCP LTA 32N658HCP CHASSIS NO LS02 PS02 1...

Страница 3: ...Please read this manual carefully before service 2...

Страница 4: ...ion of Main IC U 7 UChapter3 Analysis of Signal process Flowchart and key point measure dateU 31 UChapter4 Maintenance Procedure and Examples of Typical troubleshootingU 40 UChapter5 Spare Part ListsU...

Страница 5: ...o output THD 7 5W 5W 5W 5W 5W 5W Power source 100V 240V 100V 240V 100V 240V Teletxt 100 pages X 100 pages CCD X Yes X VCHIP X Yes X Sound demodulator NICAM IGR BTSC NICAM IGR SCART Yes X X VGA Yes Yes...

Страница 6: ...Lin2 Rin2 Lo2 R02 V1 R1 L2 Y1Pb1PR1 L3R3 8Mx16DDR Speaker Y C 19 L3 Pb1 R2 TUNER SCART2 SVP_AX32 AMP L1 I O Flash 1 R3 Y1 RO1 VO1 HDMI Headphone Pb1 RS232 PS301 Y1 V1 RGB FS1 FB1 Vout1 V3 S Video Lin...

Страница 7: ...tput it has Scart S Video AV YPbPr HDMI and PC interface Tuner input sound demodulation sound processing sound power amplifier and online update 2 Remote reception module The remote reception board mo...

Страница 8: ...2FTP 4 8M 16bits DDR SDRAM 6 U9 TDA9886T Multistandard alignment free IF PLL demodulators 7 U11 74HC4052 Audio signal switch of AV terminal 8 U15 74LVC14A VGA line and field synchronizing signal wavef...

Страница 9: ...cement Trident s patented Unified Memory Architecture UMA that allows frame rate conversion 3D comb video decoding and video enhancement processing to share the same memory buffer that is made up of h...

Страница 10: ...ext function Supports 16bits DDR memory interface Multi screen display mode OSD and VBI Closed caption and advanced OSD engine Pin function description Table1 Pin Assignments for CPU related and GPIO...

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Страница 13: ...Table2 Pin Assignments for Analog Support Interface Table3 Pin Assignments for Analog Input Interface Table4 Pin Assignments for Capture Interface TV RGB 12...

Страница 14: ...Table5 Pin Assignments for Frame Buffer Memory Table6 Miscellaneous Pin Assignments 13...

Страница 15: ...Table7 LVDS Output Pin Assignments Table8 HDMI Interface Pin Assignments Table9 Analog Audio Input Output Interface Pin Assignments 14...

Страница 16: ...Table10 Digital Audio Interface Pin Assignments Table11 Pin Assignments for Power and Ground 15...

Страница 17: ...16...

Страница 18: ...lows up to 8 devices to share a common two wire bus The device is optimized for use in many industrial and commercial applications where low power and low voltage operation are essential The AT24C64A...

Страница 19: ...e Protect Pin for Hardware Data Protection 32 byte Page Write Mode Partial Page Writes Allowed Self timed Write Cycle 5 ms Max High Reliability Endurance 1 Million Write Cycles Data Retention 100 Year...

Страница 20: ...uction W25X80 VSSIG main features Family of Serial Flash Memories 8M bit 1M byte 1 048 576 256 bytes per programmable page Uniform 4K byte Sectors 64K byte Blocks SPI with Single or Dual Outputs Clock...

Страница 21: ...Wide Temperature Range Single 2 7 to 3 6V supply 5mA active current 1uA Power down typ Software and Hardware Write Protection White Protect all or portion of memory Enable Disable protection with WP...

Страница 22: ...applications which requires large memory density and high bandwidth This Hynix 128Mb DDR SDRAMs offer fully synchronous operations referenced to both rising and falling edges of the clock While all ad...

Страница 23: ...trobes UDQS LDQS per each x8 I O Data outputs on DQS edges when read edged DQ Data inputs on DQS centers when write centered DQ On chip DLL align DQ and DQS transition with CK transition DM mask write...

Страница 24: ...Pin introduction 23...

Страница 25: ...PAL SECAM and NTSC vision and sound IF signal PLL demodulator for positive and negative modulation including sound AM and FM processing Features 5 V supply voltage Gain controlled wide band Vision Int...

Страница 26: ...quency Control AFC detector with 4 bit digital to analog converter AFC bits readable via I2C bus Take Over Point TOP adjustable via I2C bus or alternatively with potentiometer Fully integrated sound c...

Страница 27: ...TDA9886T internal block diagram 26...

Страница 28: ...0W TYP VCC VEE 9V Wide analog input voltage range 6V Fast switching tpd 13ns TYP at TA 25 C Low crosstalk between switches High ON OFF output voltage ratio Wide operating supply voltage range VCC VEE...

Страница 29: ...4A provides six inverting buffers with Schmitt trigger action It is capable of transforming slowly changing input signals into sharply defined jitter free output signals Feature Wide supply voltage ra...

Страница 30: ...designed for TV and Portable Radio applications Feature WIDE SUPPLY VOLTAGE RANGE 3 18V MINIMUM EXTERNAL COMPONENTS NO SWR CAPACITOR NO BOOTSTRAP NO BOUCHEROT CELLS INTERNALLY FIXED GAIN STAND BY MUT...

Страница 31: ...TDA7266SA internal block diagram 30...

Страница 32: ...t into speaker or earphone Signals from HDTV terminal AV terminal Scart2 interface and PC Audio are first sent into 74HCT4052 for choosing passages and then sent into SVP AX32LF SVP AX68LF for demodul...

Страница 33: ...WER CON11 PIN 8 7 6 5 U22 AP1513 1 2V SVP AX ANALOG PIN 230 SVP AX Power Supply PIN 23 83 100 122 151 169 233 244 SVP AX ADC Power Supply PIN 32 40 47 49 R400 262mA IF amplify circuitry 5V_ Sound surf...

Страница 34: ...B11 5V CON11 PIN 8 7 6 5 DDR power supply U7 PIN 1 3 9 15 18 33 55 61 U19 change into2 5V U22 IC stabilivolt 1 2V MCU U1 PIN 230 MCU PIN 23 83 100 122 151 169 233 244 MCU ADC power supply PIN 32 40 47...

Страница 35: ...3 U6 power supply PIN 2 U24 MCU IC U1 PIN 180 HDMI IC U32 PIN 7 17 27 33 56 13 43 50 61 69 75 HDMI IC U32 PIN 1 20 19 42 21 22 5V SLV MST change into 3V Q19 Q20 Q21 Q22 PIN 2 3 MCU RESET IC IMP810 2...

Страница 36: ...5V U23 AZP1122EL GND 1 2V 5V U24 AP1117E33 GND 3 3V 5V 3 Pin sequence of power cord of power panel Position number Pin Pin description 1 12VA 2 12VA 3 GND CON1 4 GND 1 5V SB 2 3 7 8 GND 4 5 5V 6 5V S...

Страница 37: ...control back light brightness control 17 CON23 Power panel 5V SB GND GND 5V 5V 5V SB GND GND 12V 12V 2 Main components descriptions Serial numbe r Position number component Function description A U1 S...

Страница 38: ...IF and video signal 5 Waveforms at key points 1 RF inputting color bar signal Composite Video Signal waveform at pin 11 of tuner U8 and the waveform at pin 52 of U1 SVP AX32LF SVP AX68LF is like this...

Страница 39: ...al SDA pin 10 of U9 pin 5 of U3 pin 5 of U12 pin 5 of U16 pin 153 of U1 pin 5 of tuner U15 4 RF inputting grey signal Composite Video Signal waveform at pin 11 of tuner U15 and the waveform at pin 52...

Страница 40: ...Inputting sound signal with 1KHz frequency with the processing of U33 and power amplifier TDA7266DNS waveform at pin 1 2 14 15 of U33 and waveform at CON4 speaker and CON5 earphone output interfaces...

Страница 41: ...the tuner and its peripheral circuits including bus and power supply If the peripheral circuits work well but there is no output from tuner then the tuner must failure 4 Failure phenomenon LCD televis...

Страница 42: ...Connect the signal cable correctly Blue screen AV or SVIDEO is displayed There is no signal input or the video cable is not connected or incorrectly connected Connect the video cable correctly Picture...

Страница 43: ...ber 15BProportion of easy damage 1 Main Board 1 2 Remote receiving board part 0 5 3 Keyboard part 0 5 4 Inner power module FSP205 4E03 JSK4200 014 Inner power module 6B5 5 LCD screen LG PHILIPS LCD sc...

Страница 44: ...ssis number Sep 18 10 37 05 is the latest upgrading time for software and Version ELT 01 Asian M32 257 25WL is the version number of current software 2 The detailed setting items are given bellow Cont...

Страница 45: ...Off IIR Big Small Factory Out Output the factory settings System Control Setting item Setting value Remark Default Lang English Default OSD language EQ Enable On Off Aging Mode On Off Logo On Off TV_A...

Страница 46: ...0H Hotel Option Setting item Setting value Remark Hotel Enable ON Hotel mode presetting On users can enter into Hotel mode Off users can t enter into Hotel mode Source Select TV ON SVIDEO2 OFF AV1 ON...

Страница 47: ...background display represents the item has been chosen Press V key to enter sub directory Use P and P keys on remote control to make up or down option and use V and V keys to set 2 All the menu funct...

Страница 48: ...Appendix LS02 PS02 module Circuit Schematic Diagram 47...

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