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Summary of Contents for Vivax TV-55LE75T2
- Page 1 TV-55LE75T2 Service manual...
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Page 3: Troubleshooting
TP.MS3463S.P C821X TP.MS3463S.P C821X Trouble Shooting Trouble Shooting ◎ ◎ Power troubleshooting Power troubleshooting ◎ ◎ Display troubleshooting Display troubleshooting ◎ ◎ Audio troubleshooting Audio troubleshooting ◎ ◎ Function troubleshooting Function troubleshooting ◎ ◎ Power board troubleshooting Power board troubleshooting 王世腾... -
Page 4: Power Board Diagram
1. Power Board Diagram Output filter 380VDC output Rectifie input filter Feed back Output filter power amplifier、 DC/DC The main IC、 Power convertor output Screen voltage and so on Feed back 380VDC output Output filter DC/DC Power convertor output Feed back BL_ON PWM_REF... -
Page 5: Power Supply Trouble
2. Power Supply Trouble 1 Non output, IR indicator light slake Check if EB202 voltage Check if 12V output normal about 380VDC Check the power Change damaged components components See next page Check if FB1 Open damage or not Check EMI Change short open components... - Page 6 3. Power Supply Trouble 2 Go to check Main board function Check if BL_ON Control Check if signal RB210&QB304 Check if Change damage &PCB303 &QB305 UB201 resistors components PIN8 damage voltage is Check if about12V EB202 voltage about Check if 380VDC UB201&UB201 Change damaged...
- Page 7 4. Power supply for LED drive IR indicator light up but backlight slake Check if LED output cable is connect correction Check PWM_REF& BL_ON Control signal Increase check is part of check is all of the Check if LED brightness/check if the brightness is in brightness is in dim output...
- Page 8 1. Power Board Diagram LED driver input PWM_REF PWM_DIM...
- Page 9 2.Power supply for LED drive IR indicator light up but backlight slake Check if LED output cable is connect correction Check PWM_DIM&PWM_REF& Control signal Increase Check if LED check is part of check is all of brightness/check output the brightness is the brightness is if Sampling short/open...
- Page 10 1、Power Supply Trouble Check Pin2 of CNB2 for 12V Check if the power Check power on the TV board. board is OK? Check UD1 for 5V_STB , UL1 for Repair the power board. 3V3_STB and UD2 for 1.15V_VDDC Repair the abnormal circuit : 1.5V_STB—check UD1 Power on , check CM2 for 2.
- Page 11 2、Display Trouble（blurred screen） blurred screen Check if the cable is correct and connected tightly Change the cable Check if the panel is OK for panel Check if the output circuit from Change panel U1(MSD3463) to the jack is normal Software error or Repair this circuit U1(MSD3463) damage...
- Page 12 3、Display Trouble （white screen） White screen Check if the voltage of panel power supply is normal(depend on panel) Check output signal Check the circuit of QM3 from U1(MSD3463) Change the panel Change U1(MSD3463) or the cable to panel...
- Page 13 4、Display Trouble（black screen） Black screen Check if BL_ON state is normal Check if the control circuit Check if the control circuit between BL_ON and between ADJ and BL_EN is normal ? PWM/ADJ is normal ? Check if the power supply Repair the circuit Change U1(MSD3463) Repair the power supply...
- Page 14 5、Audio Trouble（No sound) No sound Check the AMP power Check if PIN7 of the AMP chip Check the power supply circuit voltage is normal Check the control circuit Check the input signal Check the circuit from U1 Check the output signal to AMP Check the circuit between output jack Check the circuit from AMP to the jack...
- Page 15 6、Function Trouble（TV video） TV can’t search any channel/no picture Check input RF signal Check the RF source Check tuner power Check if IIC work Check power supply circuit Check IIC circuit Check IFP/IFN output signal Check tuner and Check the circuit from peripheral components tuner to U1(MSD3463)
- Page 16 7、Function Trouble（PC） PC mode Picture is not Picture Missing color, No signal in center dithering deflection color Check if the R.G.B Check if the signal of input signal of U1 V-sync,H-sync is OK is normal Do “reset” process Do “auto adjust” Do “reset”...
- Page 17 8、Function Trouble（HDMI、YPbPr、CVBS） HDMI , YPbPr , CVBS Check the signal at the jack Check the signal on the Check the external source Corresponding of U1 Check the circuit from jack to Change U1(MSD3463) U1(MSD3463)
- Page 19 待机电路 CNB2 配置规格：功率 ；恒流电压 CYB3 108W 111-212V CB119 RB126 SGND （若需要其它规格请修改相应橘色物料） RB127 RB128 DB103 TB101 电路 380V T5AL 250V~ EB104 RB140 CYB1 RB141 CNB1 Vbridge LCB3 LCB4 NTCB1 RB131 NTCB2 CB118 RB124 RB142 LCB1 DB106 CYB2 SGND BB101 RB123 LCB5 RB143 RB132 RB135...
- Page 20 CN10 12V_OFF 12V_OFF 5V_STB 5V_M 12V_OFF 12V_OFF 3V3_STB 蓝色 蓝色 带扣 NC/4PIN-2.0-D-H- NC/4PIN-2.0-D-H- POW_EN/ 5V_STB POW_EN TEST 5V_STB NC/10Kohm-0402- ¡ À 5 %-1/16W 10Kohm-0402- ¡ À 5 %-1/16W 100Kohm-0402- ¡ À 5 %-1/16W 10Kohm-0402- ¡ À 5 %-1/16W CD20 CD19 KMBT3904 ME2345A 0.1uF-0402-X5R-¡...
- Page 21 DVDD_DDR 不能省掉！ +1.15V_VDDC +1.5V_DDR AVDD_DDR_DATA AVDD_DDR_DATA AVDD5V_MHL +1.5V_DDR 3V3_STB 3V3_MOD1 +1.15V_VDDC +1.15V_VDDC +1.15V_VDDC DVDD_DDR 10uF-0603-X5R- ¡ À 2 0%-6.3V 2.2uF-0402-X5R- ¡ À 2 0%-6.3V 10uF-0603-X5R- ¡ À 2 0%-6.3V 1uF-0402-X5R- ¡ À 2 0%-16V FCM1005KF-121T06(120ohm-500mA) NC/0.1uF-0402-X5R- ¡ À 2 0%-16V 0.1uF-0402-X5R- ¡...
- Page 22 RXO4_N CF16 CN15 RXO4_P CF17 VCC_PANEL VCC_PANEL VCC_PANEL VCC_PANEL NC/5.6pF-0402-NPO-¡ À 5 %-50V VCC_PANEL VCC_PANEL NC/5.6pF-0402-NPO-¡ À 5 %-50V RXO4_N RXO0_N RXO0_P RXO0_N RXO0_P RXO1_N RXO1_P RXO1_N RXO1_P RXO4_P RXO2_N RXO2_P RXO2_N RXO2_P 5.6pF-0402-NPO-¡ À 5 %-50V RXEC_N RXEC_P RXEC_N RXEC_P 5.6pF-0402-NPO-¡...
- Page 23 HDMI0_5V RX2+ HDMI0_RX2_P HDMI0_5V HDMI0_RX2_N RX2- HDMI0_5V RX1+ HDMI0_RX1_P HDMI0_RX1_N RX1- 4 ¡ Á 5 R1ohm-0402-¡ À 5%-1/16W RX0+ HOTPLUG0 HDMI0_RX0_P 10Kohm-0402-¡ À 5%-1/16W HDMI0_SDA/ 10Kohm-0402-¡ À 5%-1/16W RX0- HDMI0_RX0_N RXC+ HDMI0_RXC_P HDMI0_SCL/ HDMI0_RXC_N HDMI0_HPDIN RXC- 4 ¡ Á 5 R1ohm-0402-¡ À 5%-1/16W HDMI_ARC/ 1Kohm-0402-¡...
- Page 24 RV20 VGA_RIN+ 0ohm-0402-¡ À 5 % -1/16W NC/SFI0402-240E-2R5PP-LF 75ohm-0402-¡ À 5 % -1/16W 33ohm-0402-¡ À 5 % -1/16W 5V_M 0.047uF-0402-X7R-¡ À 1 0% -16V USB_5V WLHD-051A NC/0ohm-0603-¡ À 5 % -1/10W MSMD110 ℃ 黑底白字 编带 0ohm-0402-¡ À 5 % -1/16W 100uF-16V- ¡...
- Page 25 SCART_VIN SC_CVBSIN1 75ohm-0402-¡ À 5 %-1/16W SCART_VOUT SCART_CVBS_OUT1 NC/100pF-0402-NPO-¡ À 5 %-50V 150ohm-0402- ¡ À 5 %-1/16W 0.047uF-0402-X7R- ¡ À 1 0%-16V SCART_Gin 0ohm-0402-¡ À 5 %-1/16W NC/SFI0402-240E-2R5PP-LF 120pF-0402-NPO-¡ À 5 %-50V AV14 75ohm-0402-¡ À 5 %-1/16W 管 ,DIO ESD,17.5pF,9V,DFN1006-2L,SMD,ESD5451N-2/TR,Willsemi NC/SFI0402-240E-2R5PP-LF SC_ROUT 75ohm-0402-¡...
- Page 26 CN11 5V_CI PC-CL1D-PV-A03-C-03 5V_M 5V_CI VPP1 VPP2 PCM_D0 PCM_D1 PCM_CE_N CE1# FCM1005KF-121T06(120ohm-500mA) PCM_D2 CE2# 22uF-0805-X5R-¡ À 2 0%-6. 3V 卡兼容性要求 PCM_D3 for CI 0.1uF-0402-X5R- ¡ À 2 0%- 16V PCM_D4 PCM_CD2_N CD2# PCM_D5 PCM_CD1_N CD1# PCM_D6 VS1# PCM_D7 IOIS16# PCM_WAIT_N WAIT# INPACK# PCM_IRQA_N...
- Page 27 3V3_Tun_T RFT1 0.1uF-0402-X5R- ¡ À 20%-16V 叠层电感 ,,HF Inductor,39nH, ¡ À 5%,0402,SMD,SDCL1005C39NJTDF,Sunlord 470pF-0402-X7R- ¡ À 10%-50V 1.2pF-0402-NPO-¡ À 0.25pf-50V 220pF-0402-X7R- ¡ À 10%-50V 180pF-0402-NPO-¡ À 5%-50V 1Kohm-0402-¡ À 25% SDCL1005CR27JTDF( 顺络 顺络 NC/SDCL1005CR27JTDF( SDCL1005C2N7STDFM01 SDCL1005CR18JTDF(180nH-0402 ¡ À 5%-C) SDCL1005CR18JTDF(180nH-0402 ¡ À 5%-C) 1Kohm-0402-¡...
- Page 28 RA19 NC/SK34A-SMA NC/0ohm-1206- ¡ À 5 %-1/4W RA22 AMPVCC NC/SK34A-SMA 0ohm-1206- ¡ À 5 %-1/4W AMP_MUTE AMP_MUTE/ 4K7ohm-0402-¡ À 5 %-1/16W 4K7ohm-0402-¡ À 5 %-1/16W NC/0.1uF-0603-X7R-¡ À 1 0%-50V CA36 NC/0.1uF-0603-X7R-¡ À 1 0%-50V ℃ 编带 470uF-25V-¡ À 2 0%-10¡ Á 1 2.5-105 -GF- -F=5.0(CapXon) RA14...
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