Philips DVD763SA/001, Руководство по обслуживанию, Страница: 25 / 64

Diagnostic Software, Trouble Shooting and Test Instructions
EN 40 DVD763SA 5.
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 > 1M
Ω
• 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.
Clock Check
Ensure the present of the clock to the DAC and the slave
µ
P.
Audio Mute Check
Measure the Audio mute voltage input at pin 22 of connector
1421
To toggle between ON and OFF,use the following commands:
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.
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 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:
Check the video outputs at the following testpoints:
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:
Pin nr. A/V Board Front Display
Voltage Conn. 1420 Conn. 1127
1 +3V3_Power -
2 +3V3_Power -
3 GND -
4 +12V_Power -
5 +12VSTBY -
6 GND +5VSTBY
7 +5VSTBY +12V_Power
8 GND -32V_Power
9 -12V_Power -
10 GND -
11 -32V_Power -
12 -
Clock Name Testpoint Frequency
PCM_CLK I117 11.2896MHz
±
0.02% tolerance
XOUT S1 8MHz
±
0.2% tolerance
Status Value
AudioMuteOn HIGH (>3V)
AudioMuteOff LOW (<3V)
Ref.#
Command
Name
Remarks
19a AudioMuteOn Audio Mute On
19b AudioMuteOff Audio Mute Off
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 I115
PCM_SCLK I116
PCM_CLK I117
SDT1 I114
SDT2 I112
SDT3 I110
DIG_OUT I499
STEREO L/R OUT I330 / I333
FRONT L/R OUT I336 / I339
SURROUND L/R OUT I348 / I351
CENTRE OUT I345
SUB WOOFER L/R OUT I342
Ref.# Command Name Remarks
23a VideoColDencOn Colour DENC ON
23b VideoColDencOff Colourbar DENC OFF
Name Testpoint
GREEN_Y I502
BLUE_U I491
RED_V I494
CVBS out_Mono I480
C_Mono I483
Y_Mono I482
Ref.# Command Name Remarks
25a VideoScartLo Sends out 0V
±
0.5V
25b VideoScartMi Sends out 6V
±
10%