Service Modes, Error Codes, and Fault Finding
EN 19L11M1.1L LA 5.
5. Service Modes, Error Codes, and Fault Finding
Index of this chapter:
5.1 Test Points
5.2 Service Modes
5.3 Service Tools
5.4 Error Codes
5.5 The Blinking LED Procedure
5.6 Fault Finding and Repair Tips
5.7 Repair Policy TCON Boards
5.8 Software Upgrading
5.1 Test Points
In the chassis schematics and layout overviews, the test points
are mentioned. In the schematics and layouts, test points are
indicated with “Fxxx” or “Ixxx”.
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: Color bar signal.
• Audio: 3 kHz left, 1 kHz right.
5.2 Service Modes
The Service Mode feature is split into four parts:
• Service Default Mode (SDM).
• Service Alignment Mode (SAM).
• Customer Service Mode (CSM).
• Computer Aided Repair Mode (ComPair).
SDM and SAM offer features, which can be used by the Service
engineer to repair/align a TV set. Some features are:
• A pre-defined situation to ensure measurements can be
made under uniform conditions (SDM).
• Activates the blinking LED procedure for error identification
5.2.1 General
Next items are applicable to all Service Modes or are general.
Life Timer
During the life time cycle of the TV set, a timer is kept (called
“Op. Hour”). It counts the normal operation hours (not the
Stand-by hours). The actual value of the timer is displayed in
SDM and SAM in a decimal value. Every two soft-resets
increase the hour by +1. Stand-by hours are not counted.
Software Identification, Version, and Cluster
The software ID, version, and cluster will be shown in the main
menu display of SDM, SAM, and CSM.
The screen will show: “AAAAAAB-XX.YY”, where:
• AAAAAA is the chassis name: L11M11.
• B is the region indication: E= Europe, A= AP/China, U=
NAFTA, L= LATAM.
• XX is the main version number: this is updated with a major
change of specification (incompatible with the previous
software version). Numbering will go from 01 - 99 and AA ZZ.
– If the main version number changes, the new version
number is written in the NVM.
– If the main version number changes, the default
settings are loaded.
• YY is the sub version number: this is updated with a minor
change (backwards compatible with the previous versions)
Numbering will go from 00 - 99.
– If the sub version number changes, the new version
number is written in the NVM.
– If the NVM is fresh, the software identification, version,
and cluster will be written to NVM.
Display Option Code Selection
When after an SSB or display exchange, the display option
code is not set properly, it will result in a TV with “no display”.
Therefore, it is required to set this display option code after
such a repair.
To do so, press the following key sequence on a standard RC