Related Manuals for Changhong Electric LS01+DVB-T
Summary of Contents for Changhong Electric LS01+DVB-T
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Page 1: Service Manual
LCD COLOUR TV SERVICE MANUAL CHASSIS NO.: LS01+DVB-T Please read this manual carefully before service. - Page 2 Catalog Chapter 1: Specifications and Composition ..............3 Chapter 2: Function Introduction of Main IC ..............8 Chapter 3: Analysis of Signal process Flowchart and key point measure date31 Chapter 4: Maintenance Procedure and Examples of Typical troubleshooting..42 Chapter 5: Spare Part Lists....................43 Chapter 6: Factory Setup and notice ................
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Page 3: Chapter 1: Specifications And Composition
Chapter 1: Specifications and Composition 1. Models for LS01 chassis : Region Europe Asia LT26GJ01EB LT32GJ01EB LT37GJ01EB LT26GJ12EB LT26GJ01AUB LT32GJ01AUB LT32GJ12EB LT37GJ12EB LT26GJ88EB LT32GJ88EB LT37GJ01AUB LT42GJ01AUB LT37GJ88EB LT26GJ01EBS LT32GJ01EBS LT37GJ01EBS LT32GJ12AUB LT37GJ12AUB Original LT26GJ12EBS LT32GJ12EBS LT37GJ12EBS LT26GJ88EBS LT26GJ88AUB LT32GJ88AUB Models LT32GJ88EBS LT37GJ88EBS LT37GJ88AUB... - Page 4 1) European market:...
- Page 5 2). American and Asian market:...
- Page 6 3) DVB Module DVB-T TUNER FLASH 音 频 放 音 频 放 大 大 RS232 Update MPEG Decoder STI7710 XILLEON225 RS232 I/O Y Pb Power 4. Introduction of PCB module LCD TV with LS01 is made up of power board, side AV board, remote control reception board, key board, and mainboard.
- Page 7 The remote reception board module is constituted by an indicator-light and a Remote remote reception. Customer could manipulate the LCD TV by using remote reception controller very conveniently. By the color of the indicator light, the operation module mode of the LCD TV could be judged (red is standby, green is power on). Built-in power Convert the 100V～240V （50/60HZ）AC into DC, output have +24v, +12V, +5V,...
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Page 8: Chapter 2: Function Introduction Of Main Ic
Chapter 2: Function Introduction of Main IC 1. Main ICs and functional modules of LS01 chassis Item no. Model Main function JS-6G1/111A25-A2 Tuner output sound IF and video signal Video decoder, image processor, A/D and D/A SVP-CX32LF conversion IS42S32200C1-6TL SDRAM with 2MX32bits AT24C64A-10PU-2.7 EEPROM T5BS4-9999... - Page 9 2. Function introduction of ICs or functional module of LCD TV with LS01chassis 1.Tuner （JS-6G1/111A25-A2） Pin No. Definition of pin Function description +5V power No connection +5V power IIC bus (clock) IIC bus (data) Ground Ground No connection No connection No connection SIF/Out Sound intermediate Frequency output...
- Page 10 ● Supports 16/32bits SDRAM memory interface ● Multi-screen display mode ● OSD and VBI/Closed caption and advanced OSD engine Pin function description: Pin No. Designation of pin Function of pin Analog signal input/output terminal CVBS1 CVBS input 1 Y_G1 Y input Y_G2 SCART1 Green signal input Y_G3...
- Page 11 DP_VS Field synchronization signal DP_CLK Digital port Clock DP_DE_FLD DE I/O terminal ADDR0 CPU address（R0~R7）signal ┆ ┆ ADDR7 A_D0 CPU address/data passage ┆ ┆ A_D7 MISC port control signal CVBS_OUT2 SCART2 interface CVBS signal output CVBS_OUT1 SCART1 interface CVBS signal output TEST MODE Test mode signal (grounding) AIN_HS...
- Page 12 TCLK1P TA1 M TA1P TB1M TB1P Positive/Negative LVDS differential data output TC1M TC1P TD1M TD1P Clock and power VDDM VDDM Memory port digital power VDDM VDDM VDDH 3.3V power supply VDDH VDDC VDDC VDDC VDDC 1.8V power supply VDDC VDDC VDDC VDDC VSSC...
- Page 13 AVDD3_OUTBUF +3.3V analog power AVSS_OUTBUF AVDD3_BG_ASS Analog ground AVSS_BG_ASS SVP-CX32LF internal block diagram: 3．T5BS4-9999 brief introduction: T5BS4-9999 is a high-speed 16-bit micro-controller designed for the control of various mid- to large-scale equipment. T5BS4-9999 is ROM-less product, T5BS4-9999 comes in a 64-pin flat package.
- Page 14 ●General-purpose serial interface: 1 channel ●Serial bus interface: 1 channel ●10 bit A/D conversion interface: 4 channels ●Watchdog timer ● Timer for real time clock (RTC) ● Chip select/wait controller: 4 blocks ● 34 interrupt signals output 9 CPU interrupt, 21 internal interrupt, 4 external interrupt ●...
- Page 15 P81/TB0IN1/INT6 +1.8V power supply P82/TB0OUT0 Remote red control signal P83/TB0OUT1 Remote green control signal P90/TXD0 Digital ground P91/RXD0 HDMI identity signal P92/SCLK0/ No connection CON4(10 pin) CON4(4 pin) CON4(3 pin) Bus byte selection DVCC +3.3V power Crystal oscillator interface DVSS Ground Crystal oscillator interface Bus byte selection...
- Page 16 T5BS4-9999 internal functional block diagram： 4．STV-8217/STV-8218 brief introduction STV-8217/STV-8218 main features: ■ Full-Automatic Multi-Standard Demodulation ● B / G / I / L / D / K / M / N Standards ● Mono AM and FM ● FM 2-Carrier and NICAM/BTSC ■...
- Page 17 ● Smart Volume Control (SVC), 5-band equalizer and Loudness ■ Analog Audio Matrix ● 4 stereo inputs ● 3 stereo outputs ● THRU mode ● 2 VRMS capability Pin introduction: Designation Function description SC1_OUT_L SCART1 audio output left SC1_OUT_R SCART1 audio output right VCC_H +8V power GND_H...
- Page 18 HP_LSS_R No connection VSS18_CONV DAC/ADC ground VDD18_CONV DAC/ADC power (8V) /HP_DET Earphone detection ADR_SEL hardware address selection for IIC bus VSS18 Digital ground VDD18 +1.8V power I²C bus clock I²C bus data VSS18 Digital ground VDD18 +1.8V power /RST Reset signal input/output terminal S/PDIF_IN No connection S/PDIF_OUT...
- Page 19 GND_PSUB Ground VDD18_ADC +1.8V Power VSS18_ADC Ground SIF_P Sound IF input (positive terminal) SIF_N Sound IF input (negative terminal) GNDPW_IF Ground VCC18_IF +1.8V Power GND18_IF Ground MONO_IN Mono input SC4_IN_L SCART4 audio input left SC4_IN_R SCART4 audio input right STV-8217 internal block diagram:...
- Page 20 STV-8218 internal block diagram:...
- Page 21 5．TDA8944J brief introduction: The TDA8944J is a dual-channel audio power amplifier with an output of 2* 7 W at an 8 Ω load and a 12 V supply. The circuit contains two Bridge Tied Load (BTL) amplifiers with an all-NPN output stage and standby/mute logic.
- Page 22 ● No on/off switching plops ●High supply voltage ripple rejection ● Low standby current ●Outputs short-circuit protected to ground, supply and across the load ● Overheat protection ● Linear output to drive external earphone, PC and portable audio equipment Pin introduction: Designation Function description OUT1-...
- Page 23 multimedia experience. HDMI also includes encryption for premium contents pursuant to the High‐ bandwidth Digital Content Protection (HDCP) standard. The ANX9011 embeds the HDCP keys and key selection vectors to reduce manufacturing complexity and system cost. Features: ●Single HDMI receiver supporting link data rate up to 165 MHz ●HDMI 1.1,HDCP 1.1 and DVI 1.0 compliant ●WideEye architecture for signal conditioning and equalization ●...
- Page 24 ┆ ┆ VDO4 VDO3 ┆ ┆ VDO0 VD_CLK Video output data clock Video output data effective level signal HSYNC Line synchronizing signal VSYNC Field synchronizing signal Digital audio output terminal XTAL_IN Crystal oscillator interface XTAL_OUT MCLKOUT Audio main control clock output IIS_SCK IIS bus clock IIS_WS...
- Page 25 AVDD33 47, 49, 53, 57, 61, +3.3V analog Power 86, 87 DVSS 6, 13, 18, 25, 30, 37, 65, 69, 78, 80, Digital ground 97, 106, 113, 118, 126 AVSS 46, 52, 56, 60, 64, Analog ground ANX9011L internal block diagram: 7.
- Page 26 Ground Ground Ground Select pulse input （+3.3V Power） SCART2 right audio input PC right audio input Right audio output AV right audio input HD right audio input +5V Power 74HCT4052D internal block diagram: 8. STI7710 brief introduction FEATURES • Enhanced ST20 32-bit VL-RISC CPU –...
- Page 27 9．K4D551638H brief introduction • 2.6V + 0.1V power supply for device operation • 2.6V + 0.1V power supply for I/O interface • SSTL_2 compatible inputs/outputs • 4 banks operation • MRS cycle with address key programs -. Read latency 3,4 (clock) -.
- Page 29 10. TDFS-G431D General specification...
- Page 30 TDFS-G431D Pin Description...
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Page 31: Chapter 3: Analysis Of Signal Processing Flowchart
Chapter 3: Analysis of Signal processing Flowchart This chapter mainly introduces the receipt and dispose of AV signal the power supply system and system control process of this TV. (Model of LT32GJ01E is taken as an example, other models is similar and will not be explained here for each. There are minor differences in power supply among different models of LCD screen;... - Page 32 ST82X7（Pin 3） U23 AZ78L08ZTR-E1 +12V power supply FB18 +12V（voltage of line to screen） CON1 CON11 Pin 1,2,3,4 (used by 37 inches screen) Pin 1,2,3 12V power for DVB module(pin1,2) 12V power amplifier TDA8944J(Pin 3,16) +12V power supply FB34 12V shutdown mute circuit CON403 Pin 3,4 U420 AP300 3S-5.0E1...
- Page 33 SVP-CX32 Pin 98, 108, 134,146 FB21 ST8217 Pin 7,16,20,22 ST8217 Pin 46 L28,29,22 ST8217 Pin51 AZ1117H-1.8TRE1 ST8217 Pin 42,76,54 +1.8V Y4 27MHz XO voltage 74HCT4052D Pin 16 FB12 Starting up mute circuit JS-6B2/121 Tuner Pin 3 FB16 FB24 JS-6B2/121 Tuner Pin 13 FB17 +5V（voltage of line to screen）CON1 Pin 1,2,3,4 (used by FB20...
- Page 34 T5BS4-9999 Pin 64 AZ1117H-3.3TRE1 FB25 SST39VF040 FB10 Pin 32 +1.8V T5BS4-9999 FB11 Pin 18 CON14 Pin １ U3（ AT24C64A-10PU-2.7 ）Pin 8 CON17 Pin １ U8（ TCM809SENB713 ） Pin 3 U6（ 74ALVC573PW ） CON5 Pin 1 Pin 20 Q8、9（2SK1399） Pin１ Q10、11（2SC1815M-Y） Pin１ (2) Pin level schedule for Voltage regulators on mainboard Position Component model...
- Page 36 (1) Socket definition Serial Position Connecting object Function description number number CON403 Power panel GND，GND，+12V，+12V CON11 Power panel +12V，+12V，+12V，GND，GND，GND，+5V， +5V，+5V，+5V，+5V CON13 Back light control line GND，GND，back light switch control，back light brightness control CON14 Keyboard +3.3V、GND、KEY1、KEY2 CON17 Remote control +3.3V、REMOTE、GND、indicator1、indicator1 receiving board CON4 Standby CON5...
- Page 37 Serial Position component Function description numbe number AT24C02BN-10SU-1.8 EEPROM 74LVC14AD VGA line and field synchronizing signal shaping IS42S32200C1-6TL 2MX32bits SDRAM AT24C64A-10PU-2.7 EEPROM TCM809SENB713 MCU reset IC PI5C3306LE I²C bus switcher for program upgrading Video decoding, image processor, A/D and SVP-CX32LF D/A conversion SST39VF040-70-4C-N Flash MEMORY ，...
- Page 38 (2)RF inputting color bar signal, I²C bus clock signal SDA, pin 5, 6 of U31, pin 6 of U16, pin 39 of U35, pin 58 of U4, pin 40 of U30, pin 57 of U1, pin 4 of tuner U15:...
- Page 39 (3) RF inputting color bar signal, I²C bus clock signal SDA, pin 2, 3 of U31, pin 5 of U16, pin 40 of U35, pin 57 of U4, pin 39 of U30, pin 58 of U1, pin 5 of tuner U15: (4)RF inputting grey signal, Composite Video Signal waveform at pin 14 of tuner U15, and the waveform at pin 169 of U1（SVP-CX32LF）...
- Page 40 (5)RF inputting white signal, SIF Signal waveform at pin 11 of tuner U15, and waveform at pin 73 of sound effect processing IC Stv-8217: (6)RF inputting white signal, and inputting sound signal with 1KHz frequency, inductance waveforms at pin 28, 29 of U35, and waveform of L26,L27:...
- Page 41 (7)Inputting sound signal with 1KHz frequency, with the processing of U33 and power amplifier TDA8944J, waveform at pin 1, 4, 14, 17 of U33, and waveform at CON13 speaker and CON14earphone output interfaces:...
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Page 42: Chapter 4: Maintenance Procedure And Examples Of Typical
Chapter 4: Maintenance Procedure and Examples of Typical troubleshooting of problems When you meet the following common problems, you might diagnose and get the solutions without contacting with the technicians. Symptoms Possible Reason Solutions No picture, no sound, and no 1.The power cord is not plugged in 1.Plug the power cord in indicator light on... -
Page 43: Chapter 5: Spare Part List
Chapter 5: Spare Part List This listing of maintenance and repair parts are presented for reference only, modification of parameters will not be informed. For accurate models or specifications, please consult the newest data of our company. (LT32GJ01E is taking an example) Proportion of easy Numb Name... -
Page 44: Chapter 6: Factory Setup And Notice
Chapter 6: Factory Setup and notice 1. Enter factory menu Switch on TV set, and make LCD at operating state: ① Press 【MUTE】 key on remote control； ② Press “MENU” key on remote control, and switch to “SOUND” option with 【V+】,【V-】key；... - Page 45 of picture and sound submenu brightness Bri Mid White balance Press “V+” key to enter White Balance parameters setting submenu Press “V+” key to enter Used for hotel TV Hotel Option Hotel mode submenu E²PROM data E²PROM Edit No setting editing Register Edit Register...
- Page 46 for America) PreScl FM FM_MONO IF prescale (or PreScl stereo (Stereo IF prescale) for America) PreScl NICAM NICAM sound IF prescale (or PreScl SAP (SAP IF prescale) for America) Equalizer switch ， “Off” is 5 section EQ-invisible equalization， ”On” is high/low pitch setting Program auto sequencing switch Logo Starting blue background LOGO switch...
- Page 47 Cool R Gain G Gain B Gain R Offset G Offset B Offset Hotel Option Setting Setting item Remark value Hotel mode presetting（Yes——users can enter into Hotel Hotel Mode Enable mode，No——users can’t enter into Hotel mode） Force Pos No use Notes：...
- Page 48 Appendix 1 LS01 module（taking LT32GJ01AUB for example）Circuit Schematic Diagram...
- Page 50 Defi ni ti on In CX 32 S ol u tio n(E uro pe M arket) De fi ni tio n In CX3 2 S ol uti o n(Asi a& US A M a rke t) Defi n iti on In CX 32 So lu ti on (E uro pe M arket) Defi ni ti on In CX 32 S ol u ti o n(A si a &USA M arket) R268 Defi ni ti on V i de o S ig na l...
- Page 52 POWER SUPPLY INPUT INTERFCE 3.3V_SB STANDBY : 0 CON14 POWER SUPPLY MODUEL USE MEGMEET MLT186 POWER ON : 1 CON11 FB18 R198 11x2.0mm 150_Ohm_4000mA CON12 FB19 5V_SB 2.0K 5x2.0mm 5Vstb 150_Ohm_2000mA C263 470uF/25V 4PIN C257 C265 C266 CON13 FB20 0.1uF 0.1uF 150_Ohm_4000mA 220uF/16V...
- Page 54 5V-A C602 10U/16V Only europe status,this part is need L601 5V-A To MST IC R603 R608 R609 R610 R611 C601 R601 R602 R606 R607 R612 R605 CON22 R604 CON10 C606 223 P15V330 Q601 3906 C607 223 Q602 3906 C608 223 C609 223 DVB-Y3 Q603...
- Page 55 Appendix2-DVB-T module：...
- Page 56 ppen...
- Page 63 Appendix 3 Power Module Schematic Diagram...
- Page 64 Final Assembly Diagram LT2618...