Found; Position - Philips DVD763SA/001 Service Manual

EN 40 5. DVD763SA
5.9 Test Instruction Front Display and Audio/
Video Board
These test instruction is designed specifically for SACD 2002
single disc models which has the following outputs:
• 6 Channel Audio output
• Coaxial / Optical digital output
• CVBS
• Component output YUV
• SVHS
• Double SCART output
• Front Display
5.9.1 General
• All the waveforms measurement carried out in these test
instruction will be base on the testpoint indicated in the
A/V Board and Front Display schematic diagram in the
Service manual.
• Impedance of the measuring-equipment should be > 1MΩ
• Most of the tests can be done using either the Diagnostic
software " Player script" which can be found in the chapter
"Diagnostic Software description and troubleshooting" or
the Menu interface using the Service PC with a terminal
emulation program ( e.g. Window Hyperterminal ) where it
is possible to control the execution of the Diagnostic Nuclei
• Setup for the measurement will be done in set level with all
modules connected as shown in the Wiring Block diagram.
5.9.2 General Start-Up Measurement
Supply Check:
Before starting the measurement,ensure that all power supply
are connected to the A/V and Front Display board via
conn.1420 and 1127 respectively.
Pin nr. A/V Board
Voltage Conn. 1420
1 +3V3_Power
2 +3V3_Power
3 GND
4 +12V_Power
5 +12VSTBY
6 GND
7 +5VSTBY
8 GND
9 -12V_Power
10 GND
11 -32V_Power
12
Clock Check
Ensure the present of the clock to the DAC and the slave µP.
Clock Name Testpoint Frequency
PCM_CLK I117
XOUT S1
Audio Mute Check
Measure the Audio mute voltage input at pin 22 of connector
1421
Status Value
AudioMuteOn HIGH (>3V)
AudioMuteOff LOW (<3V)
To toggle between ON and OFF,use the following commands:
Command
Ref.# Name
19a AudioMuteOn Audio Mute On
19b AudioMuteOff Audio Mute Off
Diagnostic Software, Trouble Shooting and Test Instructions
Front Display
Conn. 1127
-
-
-
-
-
+5VSTBY
+12V_Power
-32V_Power
-
-
-
-
11.2896MHz ± 0.02% tolerance
8MHz ± 0.2% tolerance
Remarks
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_Y
BLUE_U
RED_V
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
I115
I116
I117
I114
I112
I110
I499
I330 / I333
I336 / I339
I348 / I351
I345
I342
Colour DENC ON
Colourbar DENC OFF
Testpoint
I502
I491
I494
I480
I483
I482
Sends out 0V ± 0.5V
Sends out 6V ± 10%