Hisense LCD42P69P, LCD47P69P

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LCD TV Service Manual

Hisense Confidential

7.5 Troubleshooting for TV/VGA/HDMI input

No picture on the screen

Check Signal Source

Check connect

Check cable

Replace main board

Make sure signal

source is available

Reconnect

Replace cable

YES

Contents

Main LCD Television Service Manual Hisense Electric Co.Ltd. March2009 Contents Service Manual 1. Precautions and notices 1.1 Warning Page Page 1.2 Notes Page Page 2. Product Function Specifications 2.1 Product Function Page 2.2 Specifications 3. LCD Panel Spec LCD47P69P LCD TV Service Manual Hisense Confidential 3.2 General Features 4. Chassis Layout and Overall Wiring Diagrams Boards and Chassis Layout 5. Factory/Service OSD Menu and Adjustment 5.1 To enter the Factory OSD Menu 5.2 Factory OSD Menu Page Page Page LCD TV Service Manual Hisense Confidential 6 Software Upgrading The first upgrading method: 6.1 Get ready for upgrading Page 6.2 Upgrading with the MtkTool Page Page Page 6.3 Update with USB directly T Page 7. Troubleshooting 7.1 Troubleshooting for Remote Control Page Page Page Page 7.6 Troubleshooting for YPbPr input Page Page Page NEAR IC 12 AOUTR 10 VA 9 GND 8 MT8222_P1V1 (DDR1) VERSION V1.0 SFlash DDR1 LVDS out Works at normal mode Power for MT8222 only ( Always on ) 1.2 x (21K+12K)/12K= 3.3V Vout = 1.25 x ( 1 + 120/ 110 ) = 2.6V for DDR400/500 0.8 x (1+0.51K/2K) = 1.0V MT8222 Game Port Connection LVDS INTERFACE YPbPr input MT8222 GPIO Serial Flash IF Mux out from CD4052B XTAL Dip/SMD Dual Layout ( Bypass CAPs arround MT8222 ) MT8222 Bypass CAPs DDR1 ( DDR1 DRAM With Termination ) 2008/05/08 MODIFY If use SDRAM NC RD7/RD8 LP2996 for Vref and VTT of DDR1 If use ddr CD34 CD26 CD27 RD9 CD28 CD29 CD30 UD2 ON System E2PROM System Reset# Serial Flash ADJ 2008/05/05 MODIFY OPTION for CEC Stand by Function HDMI port 0 HDMI port 1 HDMIX3 ( HDMI Hot Plug Detect ) HDMI port 2 NEAR ICNEAR CONNECTOR AV2 Input Only for US, EU not stuff 2008/05/05 MODIFY Video output SCART 1 Full-SCT NEAR CONNECTOR NEAR IC YPbPr YPbPr1 port NEAR CONNECTOR SCART 1 Full-SCTSCART 2 Half-SCT SCART 1 Full-SCT SCART1/2 NEAR CONNECTOR Near swtich NEAR CONNECTOR NEAR IC Only for EU, US not stuff NEARLY TUNER NEARLY MT8222 RF Tuner AudioMUX/SPDIF COAXIAL LVDS out/MUTE/TPA3101 20 R2A15108FP LVDS POWER E-PWM MUTEL: LOW FOR MUTE R479 R475