Panasonic SA-HT940PC Service Manual

Also see for SA-HT940P: Service manual Service manual supplement

Contents

21.2. Basic Troubleshooting Guide for HDMI AV outputRX3707, RX3708, RX3701R3901LB870213) Hot-Plug signalRX3706LB3906, R3902, R3903, Q3901, D390116) Video data lines from LSI (IC8001) toUp-Converter (IC3701)14) TMDS output swing amplitude control resistor15) Host Interface External Input Clock fromL3903, L3904, L3905L3906LB3905, R3905, Q3902, R3904LB3904, R3907, Q3903, R3906RX3902R3921LB3901, L3901, L3902- DataLB3702- Clock5) HDMI Transmitter communication lines to TV2) +5V supply to TVmode from 480p to 720p / 1080i, - Pins : 55, 57, 62, 67, 71, 75, 794) HDMI Output TMDS signal linesthe TV display becomes blank.2) When switching the video output 1) Supply for IC3701 up-conversion pin LB37031) TV does not have display. Set3) HDMI Connector Solderbility conditionFL display shows U702 / U703.1) Check setting of the set in Setup Menu whetherHDMI video output is turned ON.IC3952 (Pin 4)P3901Problems Checking Points Checking components5) HDMI got no audio output. 1) Audio Data Lines RX8403, RX8402*Check ffor ssolder sshort anand/orsignal cconditioncomponent mcomponent missing/damaged as well asd as well as3) Picture shown on TV notclear / sharp1) Up-Converter (IC3701) Luminance output RX37024) Colour Problem. TV Screen is 1) Up-Converter (IC3701) Component Y, Pb, Pr output RX3703, RX3704, RX3705White / Blue / Purple.11) HDMI Pixel clock output from Up-Con to HDMILSI (IC8001) to Up-Con IC (IC3701)7) Local Port Slave Address setting resistor8) HDMI Transmitter +3.3V supply9) HDMI Transmitter +1.8V supply10) HDMI Up-con +3.3V supplyTransmitter12) Up-Con IC I2C Data and Clock LineIC3782 (Pin1), LB3902LB37016) HDMI Transmitter communication lines from LSI- Data , SDA- Clock, SCL88SA-HT940P / SA-HT940PC