Basic Troubleshooting Guide For Hdmi Av Output - Panasonic SA-HT855E Service Manual

SA-HT855E / SA-HT855EB / SA-HT855EG

21.2. Basic Troubleshooting Guide for HDMI AV output

Problems
1) TV does not have display. Set
FL display shows U702 / U703.
2) When switching the video output
mode from 480p to 720p / 1080i,
the TV display becomes blank.
3) Picture shown on TV not
clear / sharp
4) Colour Problem. TV Screen is
White / Blue / Purple.
5) HDMI got no audio output.
Checking Points
1) Check setting of the set in Setup Menu whether
HDMI video output is turned ON.
2) +5V supply to TV
3) HDMI Connector Solderbility condition
4) HDMI Output TMDS signal lines
- Data
- Clock
5) HDMI Transmitter communication lines to TV
- Data , SDA
- Clock, SCL
6) HDMI Transmitter communication lines from LSI
7) Local Port Slave Address setting resistor
8) HDMI Transmitter +3.3V supply
9) HDMI Transmitter +1.8V supply
10) HDMI Up-con +3.3V supply
11) HDMI Pixel clock output from Up-Con to HDMI
Transmitter
12) Up-Con IC I2C Data and Clock Line
13) Hot-Plug signal
14) TMDS output swing amplitude control resistor
15) Host Interface External Input Clock from
LSI (IC8001) to Up-Con IC (IC3701)
16) Video data lines from LSI (IC8001) to
Up-Converter (IC3701)
1) Supply for IC3701 up-conversion pin
- Pins : 55, 57, 62, 67, 71, 75, 79
1) Up-Converter (IC3701) Luminance output
1) Up-Converter (IC3701) Component Y, Pb, Pr output
1) Audio Data Lines
94
Checking components
IC3952 (Pin 4)
P3901
L3903, L3904, L3905
L3906
LB3905, R3905, Q3902, R3904
LB3904, R3907, Q3903, R3906
RX3902
R3921
LB3901, L3901, L3902
IC3782 (Pin1), LB3902
LB3701
LB3702
RX3706
LB3906, R3902, R3903, Q3901, D3901
R3901
LB8702
RX3707, RX3708, RX3701
LB3703
RX3702
RX3703, RX3704, RX3705
RX8403, RX8402
*Check f for s solder s short an and/or
component missing/damaged as well as component m d
signal c condition
as well as