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3.3
SECAM
COLOR
CIRCUIT
ADJUSTMENT
1.
Test Equipment and Tools
Oscilloscope
SECAM color bar generator
VTIVM
Insulated adjusting rod
2.
Adjustment Steps
1) Supply a SECAM color bar signal.
2) Connect oscilloscope probe to TPS and, as shown
in Fig. 3-5, adjust the core of T3 to align the peaks
of the waveform.
Fig. 3-5
3) Disconnect
the
grey
receptacle
wire
from
TRC-
5210A.
4) Connect VTVM
between TP6 (+) and TP? (—).
Adjust the core
of T04
for maximum
(approx.
1 Vp-p) at both ends, At this time, confirm normal
color bar phase,
5) Observe
the waveform
at the coupling point be-
tween
L710017 and C1005. Adjust the core of TO6
'to set the retrace evel as shown in Fig. 3-6
LL
A
(B)
on
rir
Fig. 3-6
6) Observe
the waveform
at the coupling point be-
tween
11002 and C1G05. Adjust the core of TOS
to set the retrace level as shown in Fig, 3-7.
3-2
Fig. 3-7
3.4
PURITY
1)
Display a monochrome pattern
2) As viewed from the back (see Fig. 3-8}, turn the
magnet lock counter-clockwise to loosen it.
Purity magnet
6 pole convergence
Yoke retaining clamp
Yoke iocking ring
Def. yoke
4 pole convergence
Fig. 38
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