Marantz NR1200 Service Manual page 94

When the results of check item (3-8.2.) are "22"
(Detection of DDC is OK.)
Checking the TMDS status register (HDMI SW)
Check item(3-8.5.). Checking register of the TMDS CLK detection status
register :
Send the following command from Termite.exe.
HDMI Rx/Tx
Send the command "i 002E 00FF 0001".
When the following value is returned, go to Yes.
HDMI IN1 "44" HDMI IN2 "22" HDMI IN3 "11"
When the following value is returned, go to No.
HDMI IN1 "00" HDMI IN2 "00" HDMI IN3 "00"
YES
Checking the TMDS status register (HDMI SW -> HDMI Rx/Tx)
Check item(3-8.7.). Checking register of the TMDS CLK detection status
register :
Send the following command from Termite.exe.
Send the command "i 0006 00FF 0001".
When the following value is returned, go to Yes.
"CC or 44"
When the following value is returned, go to No.
"other"
YES
Check item(3-8.8.). Checking the TMDS input waveform. :
Check the TMDS waveform at the following test point.
Is the waveform like the sample?
U1027
55/56/58/59/61/62/64/65pin
YES
HDMI Rx/Tx [U1027] is faulty.
Replace with a new device.
Example
i 002E 00FF 0001
NO
Example
i 0006 00FF 0001
3.3V
TMDS Signal
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
NO
HDMI SW [U1024] is faulty.
Replace with a new device.
3.3V
Example of waveform in check ① Example of waveform in check ②
Voltage scale：1.0V/div
Time scale：20ms/div
Check item(3-8.6.). Checking the TMDS input waveform. :
Check the TMDS waveform at the following test point.
Is the waveform like the sample?
HDMI IN3
137/138/140/141/143/144/146/1
47pin
HDMI IN2
U1024 124/125/127/128/130/131/133/1
34pin
HDMI IN1
83/84/86/87/89/90/92/93pin
YES
HDMI SW [U1024] is faulty.
Replace with a new device.
Recheck from check item (3.2.).
If it does not work, replace the PCB.
94
TMDS Signal TMDS
Voltage scale：1.0V/div
Time scale：1s/div
NO
Check for a short circuit in the pattern of the
TMDS line of the HDMI SW [U1024] from the
HDMI input terminal.
If there is no problem, the HDMI SW [U1024] is
faulty.
Replace with a new device.