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5. Service Modes, Error Codes, and Fault Finding
Index of this chapter:
5.1 Test Points
5.2 Service Modes
5.3 Stepwise Start-up
5.4 Service Tools
5.5 Error Codes
5.6 The Blinking LED Procedure
5.7 Protections
5.8 Fault Finding and Repair Tips
5.9 Software Upgrading
5.1
Test Points
The chassis is equipped with test points (Fxxx) printed on the
circuit board assemblies. As most signals are digital, it will be
difficult to measure waveforms with a standard oscilloscope.
Several key ICs are capable of generating test patterns, which
can be controlled via ComPair. In this way it is possible to
determine which part is defective.
Perform measurements under the following conditions:
•
Service Default Mode.
•
Video: Colour bar signal.
•
Audio: 3 kHz left, 1 kHz right.
5.2
Service Modes
Service Default mode (SDM) and Service Alignment Mode
(SAM) offers several features for the service technician, while
the Customer Service Mode (CSM) is used for communication
between the call centre and the customer.
This chassis also offers the option of using ComPair, a
hardware interface between a computer and the TV chassis. It
offers the abilities of structured troubleshooting, error code
reading, and software version read-out for all chassis.
Minimum requirements for ComPair: a Pentium processor, a
Windows OS, and a CD-ROM drive (see also paragraph
"ComPair").
5.2.1
Service Default Mode (SDM)
Purpose
•
To create a pre-defined setting, to get the same
measurement results as given in this manual.
•
To override SW protections detected by stand-by
processor and make the TV start up to the step just before
protection (a sort of automatic stepwise start up). See
paragraph "Stepwise Start Up".
•
To override SW protections detected by Viper. Depending
on the SW version it is possible that this mechanism does
not work correctly. See also paragraph "Error codes".
•
To start the blinking LED procedure (not valid in protection
mode).
Specifications
Table 5-1 SDM default settings
Region
Europe, AP(PAL/Multi)
Europe, AP DVBT
•
All picture settings at 50% (brightness, colour, contrast).
Service Modes, Error Codes, and Fault Finding
Default
Freq. (MHz)
system
475.25
PAL B/G
546.000
DVBT
PID Video: 0B 06
PID PCR: 0B 06
PID Audio: 0B 07
BJ3.0E PA
•
All sound settings at 50%, except volume at 25%.
•
All service-unfriendly modes (if present) are disabled, like:
–
(Sleep) timer.
–
Child/parental lock.
–
Picture mute (blue mute or black mute).
–
Automatic volume levelling (AVL).
–
Auto switch "off" (when no video signal was received
for 10 minutes).
–
Skip/blank of non-favourite pre-sets.
–
Smart modes.
–
Auto store of personal presets.
–
Auto user menu time-out.
How to Activate SDM
For DVBT TV's there are two kinds of SDM: an analogue SDM
and a digital SDM. Tuning will happen according table "SDM
Default Settings".
•
Analogue SDM: use the standard RC-transmitter and key
in the code "062596", directly followed by the "MENU"
button.
Note: It is possible that, together with the SDM, the main
menu will appear. To switch it "off", push the "MENU"
button again.
•
Digital SDM: use the standard RC-transmitter and key in
the code "062593", directly followed by the "MENU" button.
Depending on the software version it is possible that the
tuning will not work correctly.
Note: It is possible that, together with the SDM, the main
menu will appear. To switch it "off", push the "MENU"
button again.
•
Analogue SDM can also be activated by shorting for a
moment the two solder pads [1] on the SSB, with the
indication "SDM". They are located outside the shielding.
Activation can be performed in all modes, except when the
set has a problem with the Stand-by Processor. See figure
"Service mode pads".
SDM
SDM
Figure 5-1 Service mode pads
After activating this mode, "SDM" will appear in the upper right
corner of the screen (if you have picture).
How to Navigate
When you press the "MENU" button on the RC transmitter, the
set will toggle between the SDM and the normal user menu
(with the SDM mode still active in the background).
How to Exit SDM
Use one of the following methods:
•
Switch the set to STAND-BY via the RC-transmitter.
•
Via a standard customer RC-transmitter: key in "00"-
sequence.
5.
EN 17
2
2
SPI
SPI
1
1
G_15960_141.eps
100306
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