Philips DVD-620 Service Manual page 35

Diagnostic Software Descriptions and Troubleshooting
Ref.# Command Name
21a AudioSineOn
---- Press stop button
20a AudioPinkNoiseOn Audio
20b AudioPinkNoiseOff Audio
The audio signal ( sine or pink noise ) will also be present on
the digital output ( SPDIF ).This can be checked by connecting
digital signal to an amplifier with digital input.
Check the I2S and audio signal at the following testpoints:
Name
PCM_LRCLK
PCM_SCLK
PCM_CLK
PCM_DATA0
PCM_DATA1
PCM_DATA2
DIG_OUT
AUDIO L/R OUT
FRONT L/R OUT
SURROUND L/R OUT
CENTRE OUT
SUB WOOFER L/R OUT
All waveforms can be refered to the motherboard schematic
diagram.
5.9.4 Video Output And Buffer Amplifier
Check DC output-level at all video cinch output : 1.0V DC ±
10%
Generate a color bar using the following software commands:
Ref.# Command Name Remarks
23a VideoColDencOn
23b VideoColDencOff
Check the video outputs at the following testpoints:
Name Testpoint
BLUE I186
GREEN I185
RED I184
CVBS out I180 / I165 / I145
S-Video-C out NA
S-Video-Y out NA
ll waveforms can be refered to the motherboard schematic
diagram.
5.9.5 Play and 16/9 Detection
Check 0/6/12 signal on pin 8 of the SCART connector 1130 and
change the SCART_0 and SCART_1 input with the following
commands:
Ref.# Command Name Remarks
25a VideoScartLo
25b VideoScartMi
25c VideoScartHi
Remarks Audio output
Audio Sine Sine,1Khz on
signal ON stereo
Audio Sine No waveform
signal OFF
Pink Noise on
Pinknoise ON 6 channels
No waveform
Pinknoise OFF
Testpoint
I172
I176
I173
I174
NA
NA
I254
I241 / I221
NA
NA
NA
NA
Colour DENC ON
Colourbar DENC OFF
Sends out 0V ± 0.5V
Sends out 6V ± 10%
Sends out 12V ± 10%
DVD 620 /0X1
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 motherboard:
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 motherboard: 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 motherboard: 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 7300 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. EN 35
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