Alignments
6.
6.
Alignments
Index of this chapter:
6.1 General Alignment Conditions
6.2 Reset of Repaired SSB
6.1
General Alignment Conditions
Perform all electrical adjustments under the following
conditions:
•
Power supply voltage: 90 - 264 V
AC
, 50/ 60
3 Hz.
•
Connect the set to the mains via an isolation transformer
with low internal resistance.
•
Allow the set to warm up for approximately 15 minutes.
•
Measure voltages and waveforms in relation to correct
ground (e.g. measure audio signals in relation to
AUDIO_GND).
Caution: It is not allowed to use heat sinks as ground.
•
Test probe: R
i
> 10 M
, C
i
< 20 pF.
•
Use an isolated trimmer/screwdriver to perform
alignments.
6.2
Reset of Repaired SSB
A very important issue towards a repaired SSB from a Service
repair shop (SSB repair on component level) implies the reset
of the NVM on the SSB.
After a repaired SSB has been mounted in the set (set repair
on board level), the type number (CTN) and production code of
the TV has to be set according to the type plate of the set.
6.2.1
SSB Identification
SSB’s of this chassis are identified by a “715” code on the SSB.
715Axxxx-Nnn-MMM-OOOO
•
715 main category, Printed Wiring Board
•
Axxxx sub category, sequential coding number
•
Nnn Version code
•
N Development number
•
nn Production number
•
MMM Mounting variation code
•
OOOO Optional variation code
Make sure when replacing an SSB the SSB identification codes
match the replacement board.
