Service Modes, Error Codes, and Fault Finding
5.
Beside fault finding, ComPair provides some
additional
features
like:
•
Up- or downloading of pre-sets.
•
Managing of pre-set lists.
•
Emulation of the Dealer Service Tool (DST).
•
If both ComPair and SearchMan (Electronic Service
Manual) are installed, all the schematics and the PWBs of
the set are available by clicking on the appropriate
hyperlink.
Example
:
Measure the DC-voltage on capacitor C2568
(Schematic/Panel) at the Mono-carrier
.
–
Click on the “Panel” hyperlink to automatically show
the PWB with a highlighted capacitor C2568.
–
Click on the “Schematic” hyperlink to automatically
show the position of the highlighted capacitor.
5.4.3
Stepwise Start-up
Under normal circumstances, a fault in the power supply, or an
error during start-up, will switch the television to protection
mode. ComPair can take over the initialization of the television.
In this way, it is possible to distinguish which part of the start-
up routine (hence which circuitry) is causing the problem.
Take notice that the transition between two steps can take
some time, so give the set some time to reach a stable state.
During the transition time, the LED can blink strangely.
Stepwise start- up explanation
This is realized via ComPair and is very helpful when a
protection
is activated (see also chapter “Protections”). The
following diagram shows the start-up procedure of the set.
Every step of the stepwise start-up (also called trapped start-
up) in the diagram corresponds with the number of times the
led blinks.
FTL13U_AA_AB_312278513481.book Page 24 Thursday, December 30, 2004 1:50 PM
