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EN 16
5.
JL2.1E AA
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 (only applicable for 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 start the blinking LED procedure (not valid in protection
mode).
Specifications
Table 5-1 SDM default settings
Region
Europe, AP-PAL/Multi
NAFTA, AP-NTSC, LATAM
•
All picture settings at 50% (brightness, colour, contrast).
•
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).
Service Modes, Error Codes, and Fault Finding
Default
Freq. (MHz)
system
475.25
PAL B/G
61.25 (ch. 3)
NTSC M
–
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
Use one of the following methods:
•
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.
•
Short 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".
Figure 5-1 Service mode pads
After activating this mode, "SDM" will appear in the upper right
corner of the screen (if you have a 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.
5.2.2
Service Alignment Mode (SAM)
Purpose
•
To perform (software) alignments.
•
To change option settings.
•
To easily identify the used software version.
•
To view operation hours.
•
To display (or clear) the error code buffer.
How to Activate SAM
Via a standard RC transmitter: key in the code "062596"
directly followed by the "INFO" button. After activating SAM
with this method a service warning will appear on the screen,
you can continue by pressing the red button on the RC.
2
1
F_15710_150.eps
200905
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