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Haier LC-1910P Service Manual
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Haier LC-1910P Service Manual

Haier LC-1910P Service Manual

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LC-1910P

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Summary of Contents for Haier LC-1910P

  • Page 1 LC-1910P...
  • Page 2 1. Features 2. Safety Precautions 3. Images of Module and Circuit Boards 4. Key IC Description& Trouble Shooting Guide 5.Signal Flowing Chart 6. Bus Control Adjustment 7. Circuit Diagram...
  • Page 3 Features Model Functions LC-1910P SAMSUNG Screen size 19inch Aspect ratio 16:9 Resolution 1280×1024 Brightness 300cd/m Contrast(Darkroom) 700:1 Response time(ms) Color system NTSC NO. of preset channels Picture mode Angel of view H:150 / V:135 ° ° Color display 16,777,216 Color level...
  • Page 4 Model Functions LC-1910P D-SUB jack DVI socket SCART socket Ear-Phone Out CCD,V-CHIP Semitransparent menu ZOOM 16:9 mode Child Lock Quick View NO. of built-in speakers Audio output power(Built-in)(W) 2*1.5 Total power input（W） Voltage range（V） Power frequency（Hz） Time of sleep timer(MINS)
  • Page 5 Ｓａｆｅｔｙ　Ｐｒｅｃａｕｔｉｏｎｓ Warning High voltages are used in the operation of this product. Do not romove the cabinet back from your set. Refer servicing to qualified service personnel. Warning To prevent fire or electrical shock hazard, Do not expose the main unit to rain or moisture. Warning Do not drop or push objects into the television cabinet slots or openings.
  • Page 6 Caution Never stand on, lean on, push suddenly the product or its stand. You should pay special attention to children to children. Caution Do not place the main unit on an unstable cart stand, shelf or table. Serious injury to an individual, and damage to the television, may result if it should fall.

  • Page 7: Images Of Module And Circuit Boards

    Images of Module and Circuit Boards 1.images of Remote Board Subassembly 2.images of Control Panel Subassembly 3.images of Main Board...
  • Page 8 4.images of Power Supply 5.images of Inverter...
  • Page 9 Key IC Description 1.UOC3 Function：TV signal processor with Teletext and Nicam PIN SYMBOL DESCRIPTION VSSP2 ground VSSC4 ground VDDC4 Digital supply to SDACs(1.8V) VDDA3(3.3V) Supply(3.3V) VREF_POS_LSL Positive reference voltage SDAC(3.3V) VREF_NEG_LSL+HPL Negative reference voltage SDAC(0V) VREF_POS_LSR+HPR Positive reference voltage SDAC(3.3V) VREF_NEG_HPL+HRP Negative reference voltage SDAC(0V) VREF_POS_HPR Positive reference voltage SDAC(3.3V)
  • Page 10 AUDIOIN5L Audio-5 input(left signal) AUDIOIN5R Audio-5 input(right signal) AUDOUTSL Audio output for SCART/CINCH(left signal) ADUOUTSR Audio output for SCART/CINCH(right signal) DECSDEM Decoupling sound demodulator QSS0/AMOUT/AUDEE inter-carrier output/AM output/deemphasis(front-end audio out) GND2 Ground 2 for TV processor PLLIF IF-PLL loop filter AGC sound IF/internal-external AGC for DVB SIFAGC/DVBAGC applications...
  • Page 11 YIN(G/YIN2/CVBS-Yx Y-input for YUV interface(2th G input/Y input or CVBS/Yx input) YSYNC Y-input for sync separator YOUT Y-output (for YUV interface) U-output for YUV interface(2 RGB/YPbPr insertion UOUT(INSSW2) input) V-output for YUV interface(general purpose switch VOUT(SWO1) output) INSSW3 RGB/YPbPr insertion input R/PRIN3 R input/Pr input G/YIN3...
  • Page 12 Supply periphery on-chip voltage 110 VDDP(3.3V) regulator(3.3V) 111 P2.0/TPWM Poet 2.0 or tuning PWM output 112 P2.1/PWM0 Port 2.1 or PWM0 output 113 P2.2/PWM1 Port 2.2 or PWM1 output 114 P2.3/PEM2 Port 2.3 or PWM2 output 115 P3.0/ADC0 Port 3.0 or ADC0 input 116 P3.1/ADC1 Port 3.1 or ADC1 input 117 VDDC1...
  • Page 13 AHS0 ADC horizontal sync input Adjustable Schmidt trigger 5V tolerance Power from PIN 13 ADC_VDD ADC Power ADC_GND ADC Ground 1st Positive BLUE analog input (Pb+) 1st Negative BLUE analog input (Pb-) SOG0 1st Sync on Green 1st Positive GREEN analog input (Y+) 1st Negative GREEN analog input (Y-) 1st Positive RED analog input (Pr+) 1st Negative RED analog input (Pr-)
  • Page 14 BBLU7 Display B-port Blue Data 7 BBLU6 Display B-port Blue Data 6 BBLU5 Display B-port Blue Data 5 BBLU4 Display B-port Blue Data 4 BBLU3 Display B-port Blue Data 3 BBLU2 Display B-port Blue Data 2 BBLU1 Display B-port Blue Data 1 BBLU0 Display B-port Blue Data 0 BGRN7...
  • Page 15 104 ARED4 Display A-port Red Data 4 105 ARED3 Display A-port Red Data 3 106 ARED2 Display A-port Red Data 2 107 Pad 3.3V Ground PGND 108 Pad 3.3V Power PVCC 109 33VPNLOUT Panel on/off switch ot(Max current driving 1A) 110 COUT Crystal out 111 ARED1...
  • Page 16 P4.3 Bit 3 of port 4 P3.1/TXD Bit 1 of port 3 & Transmit data P3.2/INT0 Bit 2 of port 3 & low true interrupt 0 P3.3/INT1 Bit 3 of port 3 & low true interrupt 1 P3.4/T0 Bit 4 of port 3 & Timer 0 P3.5/T1 Bit 5 of port 3 &...
  • Page 17 4.TPA1517NE Function: Audio power amplifier IN1 is the audio input for channel 1 SGND SGND is the input signal ground reference SVRR SVRR is the midrail bypass mode enable OUT1 OUT1 is the audio output for channel 1 PGND PGND is the power ground refernce OUT2 OUT2 is the audio output for channel 2 VCC is the supply voltage input.

  • Page 18: Troubleshooting Guide

    Trouble shooting Guide 1.Power Supply Trouble Check F1 for 12V Check F1 and CN10 Check E33(470μF/25V)for 5v Check F1 for shortcut Check power output for LDO Turn on or not Check the power Check Pin3 U13 Turn on Change LDO supply net follow F1 For 350Khz Or The load is...
  • Page 19 2.Display Trouble 2.1 Black Black Screen Check 5V for BLON on CN10 Tunn on or not 12V inverter input ? Turn on Check the power supply Check the inverter Check U25/SM5964 43th PIN or self-proofed Check the cirture for Check Mcu 1,power supply Q4/MMBT3904 2,Reset...
  • Page 20 2.2 White White Screen Check power supply (for panel) Check Q24 0~3.3V（5V or 12V） ，according to the volitage） Check signal output of U5/RTD2023B Check U5 Check voltage of Q24 Check voltage between Check LCD or 1,Power supply Panel Connector U25/SM5964 3thQ24 or 2,Time circuit check U25 Check voltage of Q24...
  • Page 21 2.3 Exceptional screen Exceptional screen Check voltage for the panel Select the right panel voltage Change the panel Check the panel connector connector Change LCD Check LCD Check the output net，the Change/mend the part connector circuit Check U5 For Power supply & timer circuit...
  • Page 22 3.Audio Trouble 3.1 No Audio No Audio Check audio signal input Check the set of volume, mute Check signal from C11 U3/TPA1517NE PIN7 11.2V? Check power U3 8th Check U3 PIN1 and PIN9 for signal input Check U3 PIN4 and PIN6 for Chekc U21PIN60,61for signal output signal output Check the...
  • Page 23 3.2 TV No Audio TV no audio, having picture Check audio and PC AV Check signal ouput of SAW2/M9370M30 PIN1 Check the net between SAW2 1. check SAW2 Turn to NO AUDIO Pin1and C133/0.01μF 2. check U21 PIN29,30 trouble shooting Check C133 3.
  • Page 24 3.3 TV Audio Unormal Noise and NICAM can’t be detected Check the audio system Select the right audio Picture is normal? Check C113/0.01UF、D26、 R140/0 or change SAW2 Search again...
  • Page 25 4.Function Trouble 4.1 TV TV can not search/No picture Check RF signal input Check voltage T1/TDQ-6H3PIN6 for 5V Check voltage T1 PIN3 for 0V Check voltage T1 PIN9 for 33V Check I C signal T1 PIN4,5 Check signal T1 PIN11 Check voltage T1 PIN1 >V Examine Examine...
  • Page 26 4.2 PC Picture not in center Missing color Picture dithering No signal Check U5 RGB input Check VS,HS signal Reset Check Check OSD setting Check R,G,B Auto adjust Check VS.HS Reset circuit VS.HS...
  • Page 27 VGA_SDA YP/VGA SEL VGA_SCL SINGLE TTL VGA_R R/Pr VGA_G CBT3257 VGA_B B/Pb SINGLE/DUAL LVDS PANEL VGAVS VGAHS NT68565 OPTION CN2 OR CN3 VGA_SCL VGA_SDA DC 5V PNL 3.3V DC12V TV VS/ DVD12V 74LVC14 CN14 TV HS/ DVD5V BKLT ON/OFF CPU 5V S_3V3 AZ1117 DC 5V...
  • Page 28 R276 FB14 NC/270ohm-0603-±5%-1/10W DVD+12V 3.3V-MCU SB3216-121-1206 NC/270ohm-0603-±5%-1/10W 78L05-SOT-89 NC/3.3V CPU5V 270ohm-0603-±5%-1/10W NC/AP1501-50K5A-TO-263 22uF-25V-±20%-5*11 － 105 ℃ 0.1uF-0603-Y5V-+80%-20%-50V 22uF-25V-±20%-5*11 － 105 ℃ 0.1uF-0603-Y5V-+80%-20%-50V 8.2V-LL-34-1/2W C195 C111 NC/0.1uF-0603-Y5V-+80%-20%-50V 0.01uF-0603-X7R-±10%-50V 3PVCC AZ1117H-3.3TR-SOT-223 TC5026U-470K-BK/NA + E25 TO UOCIII DC_PW 30.9Kohm-0603-±1%-1/10W 470uF-16V-±20%-8*13 － 105 ℃ 100ohm-0603-±5%-1/10W R110 47uF-25V-±20%-5*7 －...
  • Page 29 CPU5V CPU5V C163 0.1uF-0603-Y5V-+80%-20%-50V 100ohm-0603-±5%-1/10W 5DVCC TEST R263 4K7ohm-0603-±5%-1/10W 100ohm-0603-±5%-1/10W LED_RED AT24C16N-SO-8 LED_GRN CN19 NC/330ohm-0603-±5%-1/10W R266 DVD_IR' DVD_IR R264 510ohm-0603-±5%-1/10W DVD_DAT LED_O 3.3V-MCU CPU5V 4K7ohm-0603-±5%-1/10W DVD_CLK LED_G DVD_STB R265 510ohm-0603-±5%-1/10W NC/5PIN-2.0-D-H NC/0ohm-1206-±5%-1/4W MCU-VCC CPU5V MCU-VCC NC/0ohm-1206-±5%-1/4W C219 C108 RP11 0.1uF-0603-Y5V-+80%-20%-50V R272 4*4.7Kohm-0603-±5%-1/16W 0.01uF-0603-X7R-±10%-50V...
  • Page 30 TPA1517NE-DIP20 +12V 12V AP 1N4001-DO-41 R116 0.1uF-0603-Y5V-+80%-20%-50V A.OUTR R117 A.OUTL 470uF-25V-±20%-10*13 － 105 ℃ 1000uF-16V-±20%-10*13 － 105 ℃ 1Kohm-0603-±5%-1/10W 47uF-25V-±20%-5*7 － 105 ℃ 1Kohm-0603-±5%-1/10W 47uF-25V-±20%-5*7 － 105 ℃ LOUT MMBT3906(2A)-SOT-23 ROUT 1Kohm-0603-±5%-1/10W LL4148-LL-34 1000uF-16V-±20%-10*13 － 105 ℃ R220 100uF-16V-±20%-5*11 － 105 ℃ 10Kohm-0603-±5%-1/10W R229 MMBT3906(2A)-SOT-23...
  • Page 31 +12V 15ohm-0603-±5%-1/10W 3PVCC 15ohm-0603-±5%-1/10W 470uF-16V-±20%-8*13 － 105 ℃ 3PVCC GZ1608D121T-0603 0.1uF-0603-Y5V-+80%-20%-50V 0.1uF-0603-Y5V-+80%-20%-50V 47uF-25V-±20%-5*7 － 105 ℃ R247 24.576MHZ-±30PPM-20PF-HC-49S 10Kohm-0603-±5%-1/10W R130 680ohm-0603-±5%-1/10W R182 HOUT C140 C158 100ohm-0603-±5%-1/10W NC/20pF-0603-NPO-±5%-50V 0.022uF-0603-X7R-±10%-50V OUT1 OUT6 R207 NC/0ohm-0603-±5%-1/10W 39Kohm-0603-±5%-1/10W C160 R176 TV_HS OUT2 OUT5 1Kohm-0603-±5%-1/10W 0.15uF-0603-Y5V-+80%-20%-16V R241 VDRB 100ohm-0603-±5%-1/10W...
  • Page 32 SAW1 VF389A1D- 视频 TDQ-3B8T/W126CWA VIFIN1 VIFIN2 EC0410-101K SAW2 5V/TV AF389A2D- 音频 +33V C132 0.01uF-0603-X7R-±10%-50V 100uF-16V-±20%-5*11 － 105 ℃ 0.1uF-0603-Y5V-+80%-20%-50V R125 R145 R144 100ohm-0603-±5%-1/10W SIF1 56ohm-0603-±5%-1/10W 100ohm-0603-±5%-1/10W C133 BA792L8-SOD110 R121 MLVS0603M07 SIF2 0.01uF-0603-X7R-±10%-50V 10Kohm-0603-±5%-1/10W 100ohm-0603-±5%-1/10W R113 R137 BA792L8-SOD110 10Kohm-0603-±5%-1/10W R118 22Kohm-0603-±5%-1/10W 68Kohm-0603-±5%-1/10W 10uF-25V-±20%-5*11 －...
  • Page 33 5V_RGB R195 100ohm-0603-±5%-1/10W C143 R149 R196 47uF-25V-±20%-5*7 － 105 ℃ C170 C221 NC/100Kohm-0603-±5%-1/10W NC/0.1uF-0603-Y5V-+80%-20%-50V NC/0ohm-0603-±5%-1/10W NC/10Kohm-0603-±5%-1/10W 0.1uF-0603-Y5V-+80%-20%-50V 0.1uF-0603-Y5V-+80%-20%-50V 1.8V_AVCC 1.8V_DVCC around 80mA DVD-Y DVD-Y' VT_SEL1 VGA-5V 0ohm-0603-±5%-1/10W TV R 3.3V_DVCC GZ1608D121T-0603 R135 R202 DVD-Cr' NC/0.1uF-0603-Y5V-+80%-20%-50V MMBT3906(2A)-SOT-23 R249 R106 NC/33Kohm-0603-±5%-1/10W For Single TTL Panel NC/10Kohm-0603-±5%-1/10W NC/75ohm-0603-±5%-1/10W TV G...
  • Page 34 NC/AV3-8.4-16 SCART_G SCART_B SCART_R VGA_VS VGAVS D341-015F-5A20A- 长体 100ohm-0603-±5%-1/10W VGA_R VGA_R DVD-Cb 2Kohm-0603-±5%-1/10W S-Y' 20pF-0603-NPO-±5%-50V VGA_SDA VGA_G VGA_G DVD-Cr VGAHS VGA_B VGA_B DVD-Y VGAVS 330pF-0603-X7R-±10%-50V 75ohm-0603-±5%-1/10W DSW-06 VGA_HS VGAHS VGA_SCL NC/6PIN-2.0-D-H 100ohm-0603-±5%-1/10W S-C' 2Kohm-0603-±5%-1/10W BAV99LT1(A7)-SOT-23 20pF-0603-NPO-±5%-50V C109 BAV99LT1(A7)-SOT-23 BAV99LT1(A7)-SOT-23 C166 330pF-0603-X7R-±10%-50V 75ohm-0603-±5%-1/10W 0.1uF-0603-Y5V-+80%-20%-50V...
  • Page 35 10Kohm-0603-±5%-1/10W BLON 22ohm-0603-±5%-1/10W MMBT3904LT1(1A)-SOT-23 BACKLIGHT_PW 10Kohm-0603-±5%-1/10W CN11 LSPK RSPK ROUT R218 NC/0ohm-0805-±5%-1/4W 4PIN-2.54-D-H 　 LOUT CKX3.5-40 R210 NC/0ohm-0805-±5%-1/4W C217 C218 1000pF-0603-X7R-±10%-50V 1000pF-0603-X7R-±10%-50V R107 R102 NC/1Kohm-0603-±1%-1/10W NC/1Kohm-0603-±1%-1/10W R104 NC/10Kohm-0603-±1%-1/10W R100 CN16 NC/1Kohm-0603-±1%-1/10W C220 R108 BRIGHT A.OUTSR' C212 4K7ohm-0603-±5%-1/10W NC/1uF-0603-Y5V-+80%-20% － 10V NC/MMBT3904LT1(1A)-SOT-23 NC/1uF-0603-Y5V-+80%-20% －...
  • Page 36 Sincere forever Tel:86-532-88938356...