Philips DVD723/001 Service Manual page 39

Diagnostic Software, Trouble Shooting and Test Instructions
5.9.6 Kill Circuit
To check the functionality of the Kill circuitry,the audio outputs
has to be present by the following command:
Command
Ref.# Name
21a AudioSineOn
Check the audio outputs at the audio cinch of the A/V board:
1kHz tone
Activate the Kill circuit by using the following command:
Ref.# Command Name Remarks
19a AudioMuteOn
Check the audio outputs at the audio L/R cinch and SCART of
the A/V board: No waveform
Switch off the kill circuit by using the following command:
Ref.# Command Name Remarks
19b AudioMuteOff
Check the audio outputs at the audio L/R cinch and SCART of
the A/V board: 1kHz tone
5.9.7 Digital Silence
Digital silence is a signal from the audio DAC, KILL_LR, when
there is no input to the audio DAC, or when the player is in
STOP/PAUSE mode, or during disc changing track.
To check the KILL_LR signal, use the following command and
check the voltage level at pin 16 of 7200:
Command
Ref.# Name
21a AudioSineOn
--- Press STOP
button
5.9.8 Front Display
To check the segment display of the FTD, the following
command can be used. And for full detail description of the test,
refer to the chapter of "Diagnostic Software Player Script"
which can be found in chapter "Diagnostic Software
Description and Troubleshooting"
Ref.# Command Name
30a DispDisplay
5.9.9 IR Receiver
Check at pin 22 of 7101 and observe if this line switches from
LOW (<0.3V) to HIGH (>4.5V) when pressing a key on a philips
RC5 or RC6 remote control
5.9.10 P50 Interface (Only for DVD743 model)
P50 (or Easylink) is a bi-directional serial interface for
communication between video equipment. To check for the
functionality of the P50 Interface, refer to the chapter of
'Diagnostic Software Player Script' for full detail description.
Remarks Audio output
Audio Sinewave ON 1kHz tone
Audio Mute On
Audio Mute Off
Remarks KILL_LR signal
Audio Sinewave LOW (<0.3V)
ON
Audio Sine HIGH (>4.5V)
signal OFF
Remarks
Turn ON local display
DVD 723-743 5. EN 39