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Diagnostic Software Descriptions and Troubleshooting
EN 34
5.
5.8.7
Video Nuclei
5.9
Test Instruction Motherboard
These test instruction is designed specifically for VFM2002
motherboard which has the following outputs:
•
Audio L/R
•
Coaxial digital output
•
CVBS
•
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
motherboard 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 motherboard via conn.1400 and 1401.
Clock Check
Ensure the present of the clock to the DAC and slave uP
Audio Mute Check
Measure the Audio mute voltage input at pin 22 of connector
1100
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:
4720
“Total Power On time (minutes) : XX”
4721
The total power-on time could not be read
from NVRAM.
4722
I2C bus busy before start
4740
“Total CDDA & VCD disks Play-time
(minutes) : XX”
4741
The playtime of CDDA & VCD disks could not
be read from NVRAM.
4742
I2C bus busy before start
4760
“Total DVD disks Play-time (minutes) : XX”
4761
The playtime of DVD disks could not be read
from NVRAM.
4762
I2C bus busy before start
4600
“Version of Application Software : XX”
4601
“The application version could not be read
from NVRAM.”
4602
“I2C bus busy before start”
Error
code
Error text
2300
Test successful
2320
Test successful
2340
Test successful
2400
Test successful
2401
“I2c bus busy”
2421
“I2c bus busy”
2441
“I2c bus busy”
2500
Test successful
2501
“I2c bus busy”
2502
“I2c bus not working“
2520
Test successful
2521
“I2c bus busy”
2522
“I2c bus not working“
2540
Test successful
2541
“I2c bus busy”
2542
“I2c bus not working“
6100
Test successful
6100
Test successful
Error
code
Error text
Pin nr.
Voltages
Conn. 1400
Conn. 1401
1
+5VSTBY
+3V3STBY
2
+12VSTBY
+3V3STBY
3
DGND
DGND
4
-32V
+12VSTBY
5
NA
DGND
6
NA
+5VSTBY
7
NA
DGND
8
NA
-8V
Clock Name Testpoint Frequency
PCM_CLK
I173
11.2896MHz
±
0.02% tolerance
XOUT
I325
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