Basic Troubleshooting Guide For Hdmi Av Output - Panasonic SA-PT480PH Service Manual

7.4.

Basic Troubleshooting Guide for HDMI AV output

Problems
1) TV does not have any
display. Set FL display
shows U702/U703
Checking Points
1) Check setting of the set in
Setup Menu whether the HDMI
Video output is turned ON
2) +5V Supply to the TV
3) HDMI Connector Solderability
condition
4) HDMI Output TDMS signal
lines (IC3901)
- Data (TX0P/M => 14, 16)
- Data (TX1P/M => 18, 20)
- Data (TX2P/M => Pin 22, 24)
- Clock (TXCP/TXCM =>
Pin 10, 12)
5) HDMI Transmitter
communication lines to TV
- Data, SDA (Pin 120, IC3901)
- Clock, SCL (Pin 121, IC3901)
6) HDMI Transmitter
communication from LSI (IC8001)
(I2C_SCL/I2C_SDA signals)
7) Local Port Slave Address
setting resistor at Pin 99 of HDMI
Transmitter LSI IC (IC3901) for
LPSA signal
8) HDMI Transmitter LSI IC
(IC3901) +3.3V Supply
9) HDMI Transmitter LSI IC
(IC3901) +1.2V Supply
10) HDMI Up-Con +3.3V Supply
11) HDMI Pixel Clock Output from
Up-Con to HDMI Transmitter
(VCLK)
12) Up-Con IC I2C Data and
Clock Line
38
Checking components
* This year HDMI always ON.
No need check Setup Menu.
If no resolution selection GUI, then
only check SETUP.
IC3952 (Pin 4)
P3901
L3905
L3904
L3903
L3906
LB3905, R3905, Q3902, R3904
LB3904, R3907, Q3903, R3906
RX3901
R3921
LB3901, LB3902, IC3901
(Pin 9, 13, 17, 21, 25, 124)
IC3901 (Pin 5, 26, 42, 47, 55, 75,
85, 102, 109, 116, 123), LB3908,
IC8151 (Pin 4), LB8001, IC8001
(Pin 20, 44, 83, 158, 187, 211)
LB3901
LB8901
RX3901