Denon AVR-S740H - Page 88

3-2. Error Code H1-02 failure detection procedure
Checking device. (HDMI SW)
YES
YES NO
Checking the reset waveform. (HDMI SW)
Check item(10). Checking the reset waveform :
Check the waveform.
When the power is turned on, is the TP"787_RST" waveform cor-
rect (as shown in the gure)?
IC701
788_RST
Check the reset circuit between
CPU [IC751] and HDMI SW [IC701].
If there is no problem, the HDMI
SW [IC701] is faulty.
Replace with a new device.
NO
Examples of conrmation waveform
Voltage scale：1.0V/div
Time scale：20ms/div
Check item(11). Checking the HDMI SW :
Remove the [R7147/R7149].
Is the waveform of "I2C" the correct waveform?
HDMI SW [IC701] is faulty.
Replace with a new device.
Recheck from check item (1).
If it does not work, replace the PCB.
Before Servicing
This Unit
Electrical Mechanical Repair Information Updating
88