Philips DVD 620, Руководство по обслуживанию, Страница: 35 / 59

Diagnostic Software Descriptions and Troubleshooting EN 35 DVD 620 /0X1 5.
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:
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:
Check the video outputs at the following testpoints:
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:
5.9.6 Kill Circuit
To check the functionality of the Kill circuitry,the audio outputs
has to be present by the following command:
Check the audio outputs at the audio cinch of the motherboard:
1kHz tone
Activate the Kill circuit by using the following command:
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:
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:
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”
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
Ref.# Command Name Remarks Audio output
21a AudioSineOn Audio Sine
signal ON Sine,1Khz on
stereo
---- Press stop button Audio Sine
signal OFF No waveform
20a AudioPinkNoiseOn Audio
Pinknoise ON
Pink Noise on
6 channels
20b AudioPinkNoiseOff Audio
Pinknoise OFF
No waveform
Name Testpoint
PCM_LRCLK I172
PCM_SCLK I176
PCM_CLK I173
PCM_DATA0 I174
PCM_DATA1 NA
PCM_DATA2 NA
DIG_OUT I254
AUDIO L/R OUT I241 / I221
FRONT L/R OUT NA
SURROUND L/R OUT NA
CENTRE OUT NA
SUB WOOFER L/R OUT NA
Ref.# Command Name Remarks
23a VideoColDencOn Colour DENC ON
23b VideoColDencOff Colourbar DENC OFF
Name Testpoint
BLUE I186
GREEN I185
RED I184
CVBS out I180 / I165 / I145
S-Video-C out NA
S-Video-Y out NA
Ref.# Command Name Remarks
25a VideoScartLo Sends out 0V
±
0.5V
25b VideoScartMi Sends out 6V
±
10%
25c VideoScartHi Sends out 12V
±
10%
Ref.#
Command
Name
Remarks Audio output
21a AudioSineOn Audio Sinewave ON 1kHz tone
Ref.# Command Name Remarks
19a AudioMuteOn Audio Mute On
Ref.# Command Name Remarks
19b AudioMuteOff Audio Mute Off
Ref.#
Command
Name
Remarks KILL_LR signal
21a AudioSineOn Audio Sinewave
ON LOW (<0.3V)
--- Press STOP
button Audio Sine
signal OFF HIGH (>4.5V)
Ref.# Command Name Remarks
30a DispDisplay Turn ON local display