Checking operation between the HDMI (SW) device and the HDMI device (Tx).
Checking operation between the HDMI (Tx) device and TV.
HDMI OUT1
HDMI1 in
HDMI5 in
Video Conversion OFF
NO
NO
Check item(3-13.2.). Check the TMDS CLK detection status of the
register.
Send the following command from Termite.exe.
Case of IN1
Send the command "i 0001 00C1 0001".
Case of IN5
Send the command "i 0001 00C0 0001".
When the following value is returned, go to YES.
"Other than 11"
When the following value is returned, go to NO.
"11"
Checking the TMDS status register (Switcher1/2 -> HDMI Tx)
Example
i 0001 00C1 0001
XX
The rst operation : Checking
between Monitor 1 and the TV.
Go to check item (3-13.1.).
Check item(3-13.3.). Checking the TMDS input. :
TMDS waveform at the following points.
HDMI IN1
U2601
22/24/25/27/28/30/31/33
pin
HDMI IN5
U2401
8/10/11/13/14/16/17/19 pin
U2601
U2401
HDMI Tx [U9101] is faulty.
Replace with a new device.
YES
Check item(3-13.4.). Check the HPD register value of the HDMI
TX device. :
Send the following command from Termite.exe.
Send the command "i 0000 00FF 0001".
Move to the branch destination according to the value returned.
Checking between Monitor1 and the TV.
Connect Monitor1 to the TV and check the following items with the TV turned on.
Checking the HPD status register (HDMI Tx -> Monitor)
Example
i 0000 00FF 0001
XX
"62"
(Detection of HPD is OK)
"60"
(Detection of HPD is not OK.)
Go to check item (3-13.5.).
Go to check item (3-13.8.).
Recheck from check item (3.4.).
If it does not work, replace the PCB.
Case of HDMI IN1
HDMI Switcher2 [U2601] is faulty.
Replace with a new device.
Case of HDMI IN5
HDMI Switcher1 [U2401] is faulty.
Replace with a new device.
YES
NO
TMDS Signal
3.3V
Example of waveform in check ①
Voltage scale : 1.0V/div
Time scale : 20ms/div
TMDS
Example of waveform in check ②
Voltage scale : 1.0V/div
Time scale : 1s/div
135
Before Servicing
This Unit
Electrical Mechanical Repair Information Updating
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