When the results of check item (39) are "the communication results are not OK"
Check item(40). Check of power supply voltage of
HDMI Tx IC :
Is the voltage at the test point of each power sup-
ply pin correct? (1.1 V)
The test points are as follows.
U3401
162 pin
1.1V
Check item(42). Check the reset of HDMI Tx.
Check the waveform .
Is the waveform at the test point TP (U3401) correct when power is
turned on?
U3401
RESET
Check item(41). Check the power supply voltage.
Check the power supply components (U3606) on
the substrate and peripheral pattern.
If there is no problem, remove the HDMI Tx
(U3401) from the substrate and measure the volt-
age at the test point of check item (40).
Is the power supply voltage correct? (1.1 V)
Check the power supply voltage.
Checking device. (HDMI Tx)
HDMI Tx (U3401) is faulty.
Replace with a new device.
Recheck from check item (5).
If it does not work, replace the PCB.
Recheck from check item (5).
If it does not work, replace the PCB.
Replace (R3425 and R3427) with new resistors
and check the I2C communication again.
Check item (42) If the result is not OK, the HDMI
Tx (U3401) is faulty. Replace with a new device.
Check the reset circuit between CPU (U6201) and
HDMI Tx (U3401).
If there is no problem, the HDMI Tx (U3401) is
faulty.
Replace with a new device.
The power supply circuit is faulty.
Replace the PCB.
YES NO
NO
NOYES
Example of the waveform to be checked
109
Caution in
servicing
Electrical Mechanical Repair Information Updating
To Next Page
Loading...
