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TCL L32D2710, Service Manual

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TCL L32D2710 Service Manual Download Page 35

Trouble Shooting

| 

Function Trouble

（

HDMI/YPbPr/CVBS

）

.  HDMI,YPBPR,CVBS

YPBPR

does not 

has the signal

HDMI

does not 

has the signal

CVBS does not 

has the signal

Change U6

Check the circuit

between 

AV5 and U6

1 .HDMI interface false 

welding

2 .System setting wrong ,

do “reset”

Check signal of U6 pin J1,J3,H2,H3  

is normal

Y

N

Check the circuit 

between CVBS 

interface and U6

14

Summary of Contents for L32D2710

Page 1: ...on 3 Alignment Procedure 4 Block diagram 5 Scheme Diagram 6 Troubleshooting SORGH GUDZLQJ This m anual i s t he l atest at t he t ime of pr inting and doe s not include the modification which may be m...

Page 2: ...ectric shock to the person The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance servicing instructions in the liter...

Page 3: ...impact of any kind Be particularly careful not to damage the picture tube surface 9 Unplug this television set from the wall outlet before cleaning Do not use liquid cleaners or aerosol cleaners Use...

Page 4: ...ng conductors location of antenna discharge unit connection to grounding electrode and requirements for the grounding electrode 15 2 Note to CATV system installer Only for the television set with CATV...

Page 5: ...durein youroperatinginstructions do not attempt any further adjustment Unplug the set and call your dealer or service technician 22 Whenever the television set is damaged or fails or a distinct change...

Page 6: ...lay Resolution 1366 768 CCD Closed Caption Brightness cd m2 typ 240 Sleep Timer Yes Contrast Ratio 3000 1 Teletext Option Response Time G to G 6 5ms Nicam Option Viewing Angle H V 178 178 MTS Life Tim...

Page 7: ...47 Gross Weight With Packaging Kg 5 88 VESA Mounting Dimensions LxH mm 200X150 Essential Accessories Default Optional Accessories Operation Manual English Default Wall Mount WMB233 Remote Control and...

Page 8: ...1 7 7 727 Alignment Procedure 02 06 39 06 397 06 97 6HULHV VERSION V1 0 PREPARED BY DATE 2014 5 6 APPROVED BY DATE CRT SJ FK02 2013...

Page 9: ...2 FACTORY MENU OPERATING MANUAL 1 1 COMMONLY USED 2 2 TO ENTER FACTORY MENU 2 3 ADC ADJUST 2 4 GENERAL SETING 3 5 DEBUG 4 6 SW INFORMATION 6 7 INIT TV 6 8 INIT FAC CHANEL 6 9 BURN MODE 6 V1 2 2012 01...

Page 10: ...ance First item of GENERAL SETTING 1 3 PQ picture quality DEBUG PQ NONLINEAR 1 4 Volume Last item of GENERAL SETING 2 TO ENTER FACTORY MENU 2 1 Method Press menu key and follow with key 1 1 4 7 one by...

Page 11: ...3 4 GENERAL SETING 4 2 W B ADJUST USUALLY USED Go to the white balance adjusting page 4 3 PICTURE MODE 7R FKDQJH 3DUDPHWHUV IRU GLIIHUHQW SLFWXUH PRGH OLNH PLOG ZRUP 4 4 Sound Mode 7R FKDQJH 3DUDPHWHU...

Page 12: ...l 4 8 LVDS MAP Press to change the LVDS map Caution Press this may close the output signal you just keep press left or right or ok and never press any key else especially key up and down 4 9 POWER MAP...

Page 13: ...saturation page 5 36 Hue Curve To change the hue page 5 37 Sharpness Curve To change the sharpness page 5 38 Volume Curve To change the volume page 5 39 All the CURVE are almost the same so I only sh...

Page 14: ...ANUAL 6 6 SW INFORMATION Press to show the detail of the software like the time and the checksum 7 INIT TV Initialize the TV totally reset the EEPROM 8 INIT FAC CHANEL Initialize the factory channel 9...

Page 15: ...Signal Flow Diagram Signal Flow MST3M182VGC LF Z1 HDMI IN TUNER SPI FLASH 32Mbits PANEL LVDS OUT RF Y Pb Pr L R AV L R USB IN AV AV_L AV_R YPbPr VGA or Y PB PR L R AV IN HDMI VGA AV OUT AMP OB6220RVPA...

Page 16: ...Signal Flow Diagram Power Supply Flow AC input EMI filter Recti fier Power converto r Output filter 19V 24V output ON 0FF ADJ PWM Feed back LED LED driver...

Page 17: ...Signal Flow Diagram Power Supply Flow DC DC LDO LDO LDO LDO LDO LDO DC DC 12V 5V STB 5V OFF 3V3 STB 2V5 1V8 DDR VDD 3V3 1V2 AVDD3V VDD 1V2 VDD 3V3...

Page 18: ...Signal Flow Diagram I C Bus Block Diagram MST3M182VGC LF Z1 CPU SCL SDA EEPROM TCON SCL SDA HDMI TUNER SCL SDA SCL SDA...

Page 19: ...3 ZB101 DB105 3 4 PCB102B 1 2 PCB102A 1 2 PCB101A 3 4 PCB101B RB141 RB142 RB143 RB101 RB102 RB103 RB106 RB108 RB136 UB102 1 1 2 2 3 3 ZB102 1 2 3 4 CNB3 RB123 RB124 RB126 RB127 RB129 RB128 RB130 RB140...

Page 20: ...RB829 RB830 RB831 RB832 RB838 RB839 RB842 RB840 RB841 DB804 DVCC RB807 BB801 RB808 RB801 CB807 RB803 CB806 RB804 CB805 RB805 CB804 CB801 1 2 3 4 5 6 7 8 UB801 RB852 QB804 RB818 RB819 QB803 RB822 CB80...

Page 21: ...03 X5R 20 6 3V CC2 10uF 0603 X5R 20 6 3V 5V OFF R34 NC 510ohm 0402 5 1 16W R37 NC 10Kohm 0402 5 1 16W Q9 NC MMBT3904 f 350MHz R35 NC 1Kohm 0402 5 1 16W C9 NC 1uF 0402 X5R 20 6 3V BL ADJ R54 NC 4K7ohm...

Page 22: ...P IN YP P P IN R23 33ohm 0402 5 1 16W YP P P IN YP P YIN YP P P IN CL12 0 1uF 0402 Y5V 80 20 16V CL11 0 1uF 0402 Y5V 80 20 16V CL13 NC 0 1uF 0402 Y5V 80 20 16V 2 1 4 3 6 5 AV12 AV3 120B02 03Z1 HOTPLUG...

Page 23: ...pF 0402 NPO 5 50V op 2 1 4 2 5 6 7 8 18 p 17 16 p 15 10 o 9 f 2 1 f 1 24 23 f1p 22 f1 21 f2p 20 f2 19 25 11 fp 12 14 fp p 13 3 U3 R620D CT7 10pF 0402 NPO 5 50V RT2 5R1ohm 0402 5 1 16W RT5 0ohm 0402 5...

Page 24: ...UART RX DDC UART TX DDC RXD TXD YP P SOG YP P Y IN YP P P IN YP P P IN GIN2M PC YP P L IN PC YP P R IN AV RO CVBS OUT AV LO AV IN AV RIN AV LIN VCOM0 USB0 DP USB0 DM USB1 DP USB1 DM AMP MUTE POW EN P...

Page 25: ...R 20 BSNR 21 BSNL 22 OUTNL 23 PGND 24 OUTPL 25 BSPL 26 PVCCL 27 PVCCL 28 UA31 TPA3110LD2PWPR GND GND GND CA54 0 22uF 0402 Y5V 80 20 16V CA53 0 22uF 0402 Y5V 80 20 16V CA47 0 22uF 0402 Y5V 80 20 16V CA...

Page 26: ...components damage or not Check the rectifier Check if output short Check if RB148 open Non output IR indicator light slake Check if 12V output normal Check if EB1 voltage about 2Vac Check if UB101 PIN...

Page 27: ...heck ADJ PWM ON OFF Control signal Check Main board function Change damage resistors Check if LED output short IR indicator light up but backlight slake Check if LED output cable is connect correction...

Page 28: ...V output check the external power supply Power on Check EA3 for 5V_STB output Check UL2 for 3 3V UL3 for 1 8V output Check the circuit of UL2 UL3 Check the circuit of U2 Check UC1 for 1 2V output Y N...

Page 29: ...cable is correct and connected tightly Check if the LCD panel is OK Change the cable for panel Y N Change LCD N Y 1 Check the output circuit from U6 to CN15 2 Change U6 No TCON Check the output circu...

Page 30: ...depend on panel N Y Is there voltage on grid of QM4 can changed 12 0V or 5V 0 Is there output signal from U6 Panel cable is ill connected or QM4 is damaged Check if the circuit of QM5is normal N Y Ch...

Page 31: ...black screen Black screen Check if the voltage on CN1 BL ON is high Check the control circuit from BL ON to U6 or U6 is damaged N N Y Y Repair the power supply The inverter is damaged Check if the pow...

Page 32: ...UA31 Repair the UA31 power supply Check the set of volume Mute is normal Rest it Check signal output of UA31 is normal Y N Check external speaker N Y Repair the circuit between U6 and UA31 or U6 is il...

Page 33: ...source Y Check if U3 pin3 10 18 23 for 3 3Vor 3v Check the power supply circuit Y N Check if U3 pin6 7 has data for I2C N Y Check if U3 pin12 13 have data N Check the circuit from U3 pin12 13 to U6 a...

Page 34: ...ng No signal Do auto adjust process Check if the R G B input signal of U6 is normal Do reset process on the menu Y N Check the circuit of R G B input Check if the signal of V sync H sync is OK Check t...

Page 35: ...as the signal HDMI does not has the signal CVBS does not has the signal Change U6 Check the circuit between AV5 and U6 1 HDMI interface false welding 2 System setting wrong do reset Check signal of U6...

Page 36: ......

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