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Shivaki STV-22LED3 Service Manual

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SERVICE MANUAL
STV-22LED3/STV-24LED3
第 1 页，共 57 页

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Summary of Contents for Shivaki STV-22LED3

  • Page 1 SERVICE MANUAL STV-22LED3/STV-24LED3 第 1 页，共 57 页...

  • Page 2: Table Of Contents

    CONTENTS 1. GENERAL DESCRIPTION--------------------------------------------------------------------3 2. FUNCTION LAYOUT -------------------------------------------------------------------4 3. FEATURES ---------------------------------------------------------------------------------5 4. PCB DIMENSIONS----------------------------------------------------------------------- 6 5. SCHEMATICS OF IR BOARD & KEY BOARD ------------------------------------------6 6. INTERFACE DEFINITION ------------------------------------------------------------- 6 7.SCHEMATIC------------------------------------------------------------------------------ 6 8. POWER BOARD------------------------------------------------------------------------ 6 9.BOM LIST---------------------------------------------------------------------------------- 7 10. BOARD SERVICE MANUAL------------------------------------------------------------7 11.LINE DIAGRAM-------- -----------------------------------------------------------------8 12.SOFTWARE UPDATE -----------------------------------------------------------------8 第...

  • Page 3: General Description

    T.MT5310.61A (DVB-T+C+T2)-SPECIFICATION 1. GENERAL DESCRIPTION T.MT5310.61A is a digital and analog TV control board, which is suitable for Pan Europe and UK market. It can support less than 26 inch LED panels which resolution is up to 1920×1080. T.MT5310.61A can receive and decode both Free-To-Air DTV and CA DVB-T, DVB-C, DVB-T2 program.

  • Page 4: Features

    T.MT5310.61A (DVB-T+C+T2)-SPECIFICATION FRONT VIEW OF T.MT5310.61A Earphone DC Power HDMI PC-RGB PC Audio CVBS& CVBS Audio & Component SCART Supply Component Audio In SIDE VIEW OF T.MT5310.61A Coaxial Out RF In CI Slot In RJ45 In USB Slot In REQUIREMENT OF WIRE HARNESS（optional） AV In COMPONENT In 3.FEATURES...
  • Page 5 T.MT5310.61A (DVB-T+C+T2)-SPECIFICATION Max Storage Channels 1500CH (ATV & DTV) VHF (174MHz ~ 230MHz) Receiving Range UHF (474MHz ~ 862MHz) Input Impedance 75Ω Channel Bandwidth 7MHz/8MHz DVB-T QPSK,16QAM,64QAM Modulation DVB-C 16QAM,32QAM,64QAM,128QAM,256QAM DVB-T2 QPSK,16QAM,64QAM,256QAM Video System MPEG-2 MP@ML, MPEG-2 MP@HL,H.264 MPEG-1 layer 1/2,MPEG-2 layer 2, Sound System DD, DD+ EPG, Subtitle, LCN,...
  • Page 6 T.MT5310.61A (DVB-T+C+T2)-SPECIFICATION Codec Media File Ext. Remark Video Audio PCM/ADPCM，AC3 Bit Rate：16Mbit/s MPEG-2 AAC/AAC-LC， MPEG-4 SP/ASP，H.264， .mov MPEG-4 MJPEG AAC-LC/HE-AAC，AC3 MPEG-1，MPEG-2， .mpg/.mpeg MP3，MPEG-1，AC3 MPEG-4 SP/ASP Xvid，MPEG-4 SP/ASP， .mp4/.m4v Max Solution：1920x1080， H.264 MP3， MPEG-1， MPEG-2 Frame Rate：30 Frame/Sec， MPEG-1，MPEG-2， AAC/AAC-LC，MPEG-4 Bit Rate：16Mbit/s .mkv MPEG-4 SP/ASP，H.264 AAC-LC/HE-AAC，AC3...

  • Page 7: Pcb Dimensions

    T.MT5310.61A (DVB-T+C+T2)-SPECIFICATION 4. PCB DIMENSIONS The size of T.MT5310.61A is 185.5mm(L)*147.5mm(W)*22mm(H). Ver . V1.1 Description EARPHONE OUT DC IN HDMI IN VGA IN PC AUDIO IN SCART AV IN YPbPr IN COAX OUT RF IN CI SLOT RJ45 IN USB IN 第...

  • Page 8: Schematics Of Ir Board & Key Board

    T.MT5310.61A (DVB-T+C+T2)-SPECIFICATION 5. SCHEMATICS OF IR BOARD & KEY BOARD 6. INTERFACE DEFINITION The optional connectors are marked with “*”. ◆ *CN2(10PIN/2.0): MAIN POWER SUPPLY & INVERTER CONNECTOR SYMBOL DESCRIPTION +12V DC Power Supply Back-Light ON/OFF Control for Panel Brightness Adjustment for Panel Ground ◆...
  • Page 9 T.MT5310.61A (DVB-T+C+T2)-SPECIFICATION SYMBOL DESCRIPTION Ground ◆ *CN6(6PIN/2.0): 5V POWER SUPPLY CONNECTOR SYMBOL DESCRIPTION +5V DC Power Supply Ground 5VSB +5V DC Power Supply for Standby Mode PWON Power On/Off ◆ CN10(14PIN/2.0): IR & Key BOARD CONNECTOR SYMBOL DESCRIPTION +5V DC Power Supply Red Indicator Green Indicator IR Receiver...
  • Page 10 T.MT5310.61A (DVB-T+C+T2)-SPECIFICATION SYMBOL DESCRIPTION TXOC- LVDS ODD Clock- Signal TXOC+ LVDS ODD Clock+ Signal TXO3- LVDS ODD 3- Signal TXO3+ LVDS ODD 3+ Signal TXE0- LVDS EVEN 0- Signal TXE0+ LVDS EVEN 0+ Signal TXE1- LVDS EVEN 1- Signal TXE1+ LVDS EVEN 1+ Signal TXE2- LVDS EVEN 2- Signal...
  • Page 11 T.MT5310.61A (DVB-T+C+T2)-SPECIFICATION SYMBOL DESCRIPTION Ground DVD Component-Pr Input Ground DVD Component-Y Input Ground 7. CONFIGURATION & GENERAL PRECAUTIONS  Relative humidity: ≤ 80%.  Storage temperature: -10~60° C.  Operation temperature: 0~40° C.  Protect the board from static electricity in case of damage to the IC. ...
  • Page 12 5V_STB +3V3_STB +3V3_STB LC1117CLTR33 BL_ON BL_ON C32 0.1uF-0402-Y5V-+80%-20%-16V 5V_STB 100uF-16V -± 20%-5*11 105 PW_ON 0.1uF-0402-Y5V-+80%-20%-16V DC-001- 2.0mm-G 6PIN-2.0-D-H- NC/6PIN-2.0-D-H-G NC/10PIN-2.0-D-H-G 0.1uF-0402-Y5V-+80%-20%-16V 0.1uF-0402-Y5V-+80%-20%-16V 0.01uF-0402-X7R-± 10%-50V 0.01uF-0402-X7R-± 10%-50V M_3.3V 0.01uF-0402-X7R-± 10%-50V 0.01uF-0402-X7R-± 10%-50V TC5026U-470K-06 CH8010U-220K-045-G M_5V M_3.3V 15Kohm-0402-± 1%-1/16W 15Kohm-0402-± 1%-1/16W VDD3V3 +12V +12V PVCC...
  • Page 13 VDD3V3 VDD3V3 MUX_LIN C239 MUX_LIN/ SPI-CSN MUX_RIN C240 MUX_RIN/ SPI-SDO HOLD# 1uF-0603-Y5V-+80%-20%-10V M_3.3V 1uF-0603-Y5V-+80%-20%-10V #F_WP SPI-SCK R370 E2P_WP SPI-SDI M_SCL M_SDA R168 AMP RIN AMP RIN/ 100Kohm-0402-± 5%-1/16W NC/4K7ohm-0402-± 5%-1/16W 0.1uF-0402-Y5V-+80%-20%-16V 4K7ohm-0402-± 5%-1/16W R269 AMP LIN AMP LIN/ 0.1uF-0402-Y5V-+80%-20%-16V 4K7ohm-0402-± 5%-1/16W MX25L6406EM2I-12G 10Kohm-0402-±...
  • Page 14 RDQ0 B_A0 RDQ1 B_A1 DDRV RDQ2 B_A2 RCLK0 R108 CLK0 RDQ3 B_A3 RDQ4 B_A4 R109 RDQ5 B_A5 C120 C122 C123 C124 C125 C126 100ohm-0402-± 1%-1/16W RDQ6 B_A6 RDQ7 B_A7 RDQ8 B_A8 RDQ9 B_A9 RCLK0# R110 CLK0# RDQ10 B_A10 DQ10 A10/AP RDQ11 B_A11 0ohm-0402-±...
  • Page 15 YD1517P(F) +12VOFF R124 IC MUTE 0.1uF-0402-Y5V-+80%-20%-16V +12VOFF 470uF-16V -± 20%-8*12 105 10Kohm-0402-± 5%-1/16W 4K7ohm-0402-± 5%-1/16W 4K7ohm-0402-± 5%-1/16W AMP RIN/ R126 C101 AMP LIN/ R128 C102 C115 C117 100uF-16V -± 20%-5*11 105 100pF-0402-NPO-± 5%-50V 470uF-16V -± 20%-8*12 105 100pF-0402-NPO-± 5%-50V 470uF-16V -± 20%-8*12 105 1uF-0603-Y5V-+80%-20%-10V CN17 1uF-0603-Y5V-+80%-20%-10V...
  • Page 16 CN22 AV_L M_5V 5V_AMP AV_IN/ C145 AV_R CN23 R140 R141 R142 R143 USB_5V M_5V USB_DM0 EJ-3522-5P USB_DP0 SPDIF_OUT R156 C155 PC_AUD_LIN PC_AUD_RIN AV_LIN AV_RIN 0ohm-0402-± 5%-1/16W RUSB-UK-04WH 240ohm-0402-± 1%-1/16W + E15 R146 R147 R148 R149 CN35 FSMD110 100ohm-0402-± 5%-1/16W R144 100Kohm-0402-±...
  • Page 17 SCART1_VI R229 C190 SC1_VI CN13 C191 R230 5V_AMP SCART1_AROUT 220pF-0402-X7R-± 10%-50V SCART1_RI 75ohm-0402-± 5%-1/16W SCART1_ALOUT 100ohm-0402-± 5%-1/16W R233 0.047uF-0402-X7R-± 10%-16V AGND SCART1_RI R235 C195 SC1_RIN/ BGND SCART1_LI SCART1_Bin SCART1_ FS 12Kohm-0402-± 5%-1/16W R237 SWTCH 8K2ohm-0402-± 5%-1/16W R239 GGND 1uF-0603-Y5V-+80%-20%-10V CLKOUT SCART1_Gin 100Kohm-0402-±...
  • Page 18 R271 HDMI_CEC NC/100ohm-0402-± 5%-1/16W NC/ICVL0518030FR HDMI_RX2+ NC/ULCE0505A015FR HDMI_RX2- CN27 NC/ULCE0505A015FR HDMI_RX2+ HDMI_RX1+ RX2+ HDMI_RX2- HDMI_5V NC/ULCE0505A015FR RX2- HDMI_RX1+ HDMI_RX1- SHELL(GND) RX1+ R270 HDMI_RX1- HDMI_5V NC/ULCE0505A015FR RX1- HDMI_RX0+ HDMI_RX0+ RX0+ SHELL(GND) HDMI_RX0- NC/ULCE0505A015FR RX0- R272 HDMI_RXC+ HOTPLUG HDMI_RX0- RXC+ HDMI_RXC- NC/ULCE0505A015FR SHELL(GND) RXC- HDMI_RXC+...
  • Page 19 4K7ohm-0402-± 5%-1/16W 100ohm-0402-± 5%-1/16W 3V3_DEMOD MT8295BNE PCM_CD1_N 10Kohm-0402-± 5%-1/16W 4K7ohm-0402-± 5%-1/16W PCM_CD2_N 10Kohm-0402-± 5%-1/16W 4K7ohm-0402-± 5%-1/16W 0.1uF-0402-Y5V-+80%-20%-16V TS1_D0 CI_D0 MI_D0 4K7ohm-0402-± 5%-1/16W 0.1uF-0402-Y5V-+80%-20%-16V TS1_D1 CI_D1 MI_D1 CI_GPIO0 SPI_DATA CI_VS1_N 10Kohm-0402-± 5%-1/16W TS1_D2 CI_D2 GPIO0 CI_WEB MI_D2 CI_GPIO1 SPI_CLE TS1_D3 CI_D3 GPIO1 CI_DATA2 MI_D3...
  • Page 20 M_5V 2V5_VDD_SiTUN C147 C152 0.1uF-0402-Y5V-+80%-20%-16V LC1117CLTRAD 0.1uF-0402-Y5V-+80%-20%-16V R316 C153 0.01uF-0402-X7R-± 10%-50V IF_AGC/ IFAGC1_SiTUN CH4055U-100K-021 M_5V 4K7ohm-0402-± 1%-1/16W R321 C171 C193 10Kohm-0402-± 5%-1/16W C223 T2DEMOD_1.2V AVDD1V2 TUNER_RESET R305 Si_RESET 0.047uF-0402-X7R-± 10%-16V 22Kohm-0402-± 5%-1/16W R306 R308 R309 100ohm-0402-± 5%-1/16W 4K7ohm-0402-± 5%-1/16W R120 C213 C214 AIC2857FGR8TR...
  • Page 21 DVDD3V3_MII R338 4K7ohm-0402-± 5%-1/16W DVDD3V3_MII ETMDC REGOUT REGOUT ETMDIO MDIO AVDD33 ETTXD0 TXD0 ETTXD1 C264 C265 DVDD3V3_MII IP101A TXD1 ETTXD2 10uF-0805-Y5V-+80%-20%-10V TXD2 AGND ETTXD3 0.1uF-0402-Y5V-+80%-20%-16V TXD3 AGND R339 ETTXEN 0.1uF-0402-Y5V-+80%-20%-16V TX_EN RMIIPHY_REF_CLK 49R9ohm-0402-± 1%-1/16W TX_CLK/REF_CLK ETRXDV 49R9ohm-0402-± 1%-1/16W RX_DV/CRS_DV TEST_ON ETRXD0 0.1uF-0402-Y5V-+80%-20%-16V RXD0...
  • Page 22 第 22 页，共 57 页...
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  • Page 25 第 25 页，共 57 页...
  • Page 26 1. Power Supply Overview 电性能指标：ＬＫ－ＰＬ２４０４０５Ａ 1.1 Table 1 Input Electrical Characteristics Overview ( ） 输 入特性 Input voltage range 输入电压范围 90Vac-264Vac Normal voltage range 100Vac-240Vac 标准输入 Frequency range 频率范围 50Hz/60Hz Max input AC current 满载输入电流 100Vac/1.5A Max Inrush current (cold start) 浪涌电流(冷机）...
  • Page 27 1.5 LED General Requirements 1.5.1 Table 1 Input Electrical Characteristics Overview ( 输 入特性） PARA METER SYMBOL TYPICAL UNIT REMARK 参 数 符 号 最小值 典 型 值 最大值 单 位 备 注 INPUT VOLTAGE 11.4 12.6 输入电压 NPUT CURRENT Vin=12V,Von/off=5V 1.22 1.45...
  • Page 28 2.Pin Connection(连接器脚位定义) Power supply connectors （电源输入/输出端子）AC INPUT(交流输入) Location （位置）: CON1 Connector type （端子型号）: 3.96mm-3Pin Pin assignments: Table. Symbol Pin No Description (符号) (引脚号) (描述) DC Input(直流输入) : Location （位置）: CON2 Connector type （端子型号）: JST S6B-PH-K-S or equivalent Pin assignments: Table. (2.0mm -6Pin) Symbol Pin No Description...
  • Page 29 5. EMC (电磁兼容性） 5.1 EMI（电磁干扰） The power supply shall compliance with the following Criterion: 电源电磁干扰满足下列规则： 1）Conduction Emission:( ） 传导干扰度 EN55022， CLASS B GB9254,CLASS B FCC PART15 CLASS B 2) Radiate Emission:( ） 辐射干扰度 EN55022， CLASS B GB9254,CLASS B FCC PART15 CLASS B 5.2 EMS（电磁干扰）...
  • Page 30 9.Housing ASSEMBLY DRAWING （结构尺寸） 第 30 页，共 57 页...
  • Page 31 公司名称：东莞乐科电子有限公司 系列 尺寸 机种名称 版本 拟制： 审核： 批准： 日期 第 31 页，共 57 页...
  • Page 32 LK-SP104804A 1. Power Supply Overview 电性能指标: 1.1 Table 1 Input Electrical Characteristics Overview （输入特性） Input voltage range 90Vac to 264Vac 输入电压 Normal voltage range 标称输入 100Vac to 240Vac Frequency range 频率范围 50Hz/60Hz±5% Max input ac current 1.5Amax at full load condition 满载输入电流...
  • Page 33 LK-SP104804A 2) Outputs shall be bypassed at the connector with a 0.1uF ceramic capacitor and a 10uF electrolytic capacitor to simulate system loading. 离电源板大于 30CM 处输出电源端并联 0.1uF 的陶瓷电容和 10uF 的电解电容来模拟负载测试 1.2.3 Output Transient Response. （输出动态响应） Table 4. Test condition.测试条件 Voltage Tolerance Limit Slew Rate Load Change 12±5%...
  • Page 34 LK-SP104804A 1.2.7 Table8 AC turn-on delay time（ 开机输出延迟时间） 开机输出延迟时间 ≤ 2S 1.3 Protection: （保护功能） 1.3.1 Table 9 DC output Over Voltage Protection. （输出过压保护） Output Voltage Max. Over Voltage Comments +12V Hiccup 尝试重复启动 Note: The power supply shall be test at max AC voltage (264Vac) and min load or no load. 应该在最大交流输入电压...
  • Page 35 LK-SP104804A （绝缘性能） 2. Isolation 2.1 Table 12 （绝缘阻抗） Input To Output DC500V 50MΩmin (at room temperature) Note: 2.2 Table 13 （绝缘耐压） Input To Output 3000Vac 50Hz 1minute ≤ 10mA 3. Safety （安全规格） The power supply shall compliance with the following Criterion: 电源安全性满足下列标准...
  • Page 36 LK-SP104804A 4.2 EMS （电磁抗扰） The power supply shall compliance with the following Criterion: 电源电磁抗扰满足下列规则： 1) ESD （静电抗扰度） *GB17626.2-1998/IEC61000-4-2 2) EFT （脉冲群抗扰度） *GB17626.4-1998/IEC61000-4-4 3) Surge （雷击浪涌） *GB17626.5-1998/IEC61000-4-5 L to N 1KV,L、N to FG 2KV 5. Environmental Requirement （工作环境） 5.1 Temperature （环境温度） * Operating: -10℃...
  • Page 37 LK-SP104804A (连接器脚位定义) 9. Pin Connection TYPE : 2.0MM*6PIN Table 14 CON2 Connection And Function Pin Connection Function +12V +12V TYPE : 2.0MM*12PIN Table 15 CON3 Connection And Function Pin Connection Function Table 16 CON1 Connection And Function Pin Connection Function AC-L AC INPUT LINE AC-N...
  • Page 38 LK-SP104804A 10. Power Supply Mounting （安装尺寸） Fig. 9.1 Mount Method( 装配注意事项 ) 电源为横装结构，散热器应有良好自然通风。 散热器离外壳金属板间距应大于 5mm,不足应加绝缘处理。 第 38 页，共 57 页...
  • Page 39 LK-SP104804A Mount Method( 装配注意事项 ) Table 17 ≤ 5.5mm (1*) ≥ 6.0mm 130.0m Note: Mount the unit to the mounting SPS UNIT board using M3 screw. The maximum value of the tightening torque is 0.4N-M. The insertion depth of the screw should be less 5.5mm.
  • Page 40 T3.15AL/250Vac CON1 +12V PC1B PS-ON 5VSB +12V PC1A 公司名称：东莞乐科电子有限公司 Sheet 1 of 1 SP104804A 尺寸 : A4 机种名称 : 版本 :0.1 CON2 拟制： 审核： 批准： 日期 : 2011/05/20 第 40 页，共 57 页...

  • Page 41: Power Board

    STV-22LED3 BOM LIST Part No qunty for unit Description BMT5310-61B-- main board BXATB004----- Tuner 06PL2405A1LK power board with mylar 23PL2405A45LK Mylar BAD0007A----I IR Board Ass'y BAD0008A----I KEY Board Ass'y 17M215XW031YD LED panel JBD551-V001-I IR/key board connecting cable power cord JP2162------I...
  • Page 42 STV-22LED3 BOM LIST 15302211102XY accessories bag MA3X0017---AI terminal label(side) MA3X0018---AI terminal label(bottom) MA3X0016B--AI Rear label 15A19L14G35HY carton handle MG3X0020---EI Sawtooth belts MA3X0222B---- label MF2X0001A---I waranty card MA3X0224A---I Promo_stickers MF1X0006B---I Energy label 23120230M20SY acetate tape 200mm MA4X0061---AI Non Woven(10mm×0.3mm×450mm) 第 42 页，共 57 页...
  • Page 43 STV-24LED3 BOM LIST Part No qunty for unit Description BMT5310-61B-- main board BXATB004----- Tuner BPE0022A----I power board with mylar BL-DCDC5----I DC/DC board BAD0007A----I IR Board Ass'y BAD0008A----I KEY Board Ass'y BFL001------I LED panel JBD601-V001-I IR/key board connecting cable JP2162------I power cord JW4451-C005-I speaker connector JWA181-V003-I...
  • Page 44 STV-24LED3 BOM LIST MA3X0015---AI terminal label(bottom) MA3X0016A--AI Rear label 15A19L14G35HY carton handle MG3X0020---EI Sawtooth belts MA3X0005---AI PVC pad MA3X0222C---- label MF2X0001A---I waranty card MA3X0224A---I Promo_stickers MF1X0006C---I Energy label 23120230M20SY acetate tape 200mm MA4X0061---AI Non Woven(10mm×0.3mm×450mm) 第 44 页，共 57 页...
  • Page 45 1. 1. Power Supply Troubleshooting Power Supply Troubleshooting Check if E8 Check if E8 is 5V？ Check U5 and the Check if U12_PIN2 is 3.3V? circuit of U5 Power on and check if R115 Power on and check if R115 Change U12 is 3.3V? Check if PIN3 of Q10 is...
  • Page 46 2. 2. Display Troubleshooting (Exceptional Screen / White Screen) E ceptional Screen Exceptional Screen / White Screen Is upgrade software OK? Old software is wrong. Check if the LVDS cable is correct and connected tightly Check if the voltage of CN11_PIN1 is OK？...
  • Page 47 3. 3. Display Troubleshooting (Black Screen) Black Screen Check if backlight is OK? Reference to the maintenance process of "Exceptional screen / Whit White screen" " Check if the voltage of CN3_PIN3 (BLON Signal) is high level Check if the voltage of CN3_PIN4 is normal? 1 Check Q3 and surrounding components 1、Check Q3 and surrounding components.
  • Page 48 4. Audio Trouble 4. Audio Troubleshooting All Channels No Sound Check if Volume and MUTE Settings are normal? Check if there is signal on CN17? Check if U10_PIN7 is 12V? k if U10 PIN7 i 12V? Check if the voltage of k if th U10_PIN8 is higher than 8.5V Check if U1_PIN201,203...
  • Page 49 5. Audio Troubleshooting（ （ SCART/PC/AV/ No Sound） ） 5. Audio Trouble SCART/PC/AV/YPbPr YPbPr No Sound SCART/PC/AV/ SCART/PC/AV/YPbPr SCART/PC/AV/ SCART/PC/AV/YPbPr YPbPr No Sound YPbPr No Sound No Sound No Sound Reference to the Check if other maintenance process of “All Channels No All Channels No channels are no sound? Sound”...
  • Page 50 6. Function Trouble 6. Function Troubleshooting ATV/DVB-T/DVB-C can't scan any channel （ （ ATV/DVB T/T2/C） ） ATV/DVB- - T/T2/C 1.Check if the external RF input signal is normal. 2.Check if the country, region and standard are set correctly. Check if the voltage Check if the voltage of Check if T1_PIN10、11 of U14_PIN3 is 5V?
  • Page 51 7. Function Trouble 7. Function Troubleshooting (HDMI) (HDMI) HDMI does not has the signal 1 .HDMI interface false welding 2 .System setting wrong , do “reset” 第 51 页，共 57 页...
  • Page 52 8.Function Trouble 8.Function Troubleshooting (PC) (PC) PC Channel PC Channel Image Picture is No signal Color fade Dithering not in center Check if the R,G,B input signals Check if the VS,HS input signals of U1_PIN152~156 are normal? of U1_PIN150,151 are normal? OSD setting Check the circuit The data of...
  • Page 53 9.Function Trouble 9.Function Troubleshooting (SCART) (SCART) SCART Channel SCART Channel SCART SCART-OUT SCART SCART-OUT Can’t automatically No Signal No Sound color fade No Signal switch to SCART channel Check if the Check the Check if the Check the R,G,B input Check the circuit circuit between voltage of...
  • Page 54 10. Function Trouble 10. Function Troubleshooting (AV, (AV,YPBPR) ) YPbPr No Signal / Color Fade CVBS N Si No Signal Check if the 5V power Check if supply of U13_PIN16 U16_PIN4,7,9 and control signal of Check if the have signals? have signals? Check if C58 Check if C58...

  • Page 55: Line Diagram

    STV‐22LED3    Line    Diagram    第 55 页，共 57 页...
  • Page 56 STV‐24LED3    Line    Diagram    第 56 页，共 57 页...

  • Page 57: Software Update

    SOFTWARE UPDATE:  Copy the BIN file to USB, when      the    TV in the standby state ,Insert the USB to  main board .    This    indicator    lights.    When    the light is extinguished, software  upgrade complete.      第 57 页，共 57 页...

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