Panasonic SC-XH70, Service Manual

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7.3. Basic Troubleshooting Guide for HDMI AV output
Problems Checking Points Checking components
1) Check setting of the set in
Setup Menu whether the HDMI
Video output is turned ON
* This year HDMI always ON.
No need check Setup Menu.
If no resolution selection GUI, then
only check SETUP.
2) +5V Supply to the TV
IC3952 (Pin 4)
3) HDMI Connector Solderability
condition P3901
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)
L3905
L3904
L3903
L3906
- Data, SDA (Pin 120, IC3901)
- Clock, SCL (Pin 121, IC3901)
5) HDMI Transmitter
communication lines to TV
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
12) Up-Con IC I2C Data and
Clock Line
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)
1) TV does not have any
display. Set FL display
shows U702/U703
LB3901
11) HDMI Pixel Clock Output from
Up-Con to HDMI Transmitter
(VCLK)
LB8901
RX3901