Audio Dac And Amplifier; Video Output And Buffer Amplifier; Play And 16/9 Detection; Kill Circuit/Digital Silence - Philips DVD963SA Service Manual

Diagnostic Software, Trouble Shooting and Test Instructions
5.9.3

Audio DAC And Amplifier

Ensure that the Audio mute signal is OFF
To check the DAC and buffer amplifier,send the following
commands.
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
SDT1
SDT2
SDT3
DIG_OUT
STEREO 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 A/V board 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
GREEN_SCART
BLUE_SCART
RED_SCART
CVBS out_Mono
C_Mono
Y_Mono
ll waveforms can be refered to the A/V board schematic
diagram.
5.9.5

Play and 16/9 Detection

Check DC voltage at S-VIDEO-CHROMA output (pin 4) with a
6k8 ohm load and SCART connector 1403 (pin 16) and change
the SCART0 and SCART1 input using the following
commands:
Ref.# Command Name Remarks
25a VideoScartLo
25b VideoScartMi
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
I112
I114
I116
I110
I106
I102
I629
I510 / I520
I552 / I524
I533 / I536
I530
I527
Colour DENC ON
Colourbar DENC OFF
Testpoint
I601
I600
I602
I662
I675
I667
Sends out 0V ± 0.5V
Sends out 6V ± 10%
DVD963SA
Ref.# Command Name Remarks
25c VideoScartHi
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 and
SCART 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 and SCART board respectively: 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 and SCART board: 1kHz tone
5.9.7 Digital Silence
Digital silence is a signal from the audio DAC7301 (MFL,MFR)
and DAC7300 (MSR/MC),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 MFL signal, use the following command and
check the voltage level at pin 41 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 7401 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
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.
5. EN 39
Sends out 12V ± 10%
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