Sony Trinitron KV-25K5A - SECTION 4 CIRCUIT ADJUSTMENTS; Bell Filter Adjustment; Deflection System Adjustment

KV-25K5/29K5
BELL
FILTER
ADJUSTMENT
(Secam
models
only).
V
SIZE
_
Se
|
|
-
Note
:
Ensure
that
the
TV
set
has
been
powered
up
for
at
least
1
minute
to
allow
for
drift
before
carrying
out
the
following
adjustment.
V
LIN
_—
Input a video SECAM Colour Bar signal via AV1.
2.
Connect
an
oscilloscope
to
pin
1
of
CN504
[R-OUT]
on
the
A
board.
_
S
CORRECTION
3.
Enter
into
the
‘Picture’
menu
and
select
‘Bell-f0’.
4.
Decrease
the
register
of
‘Bell-f0’
until
the
following
waveform
change between RED and BLUE is obtained.
V CENTRE
H CENTRE
H SIZE
Before
adjustment...
After
adjustment
im
When the correct waveform has been obtained add an
additional
7
steps
to
the
register.
PIN
AMP
DEFLECTION SYSTEM ADJUSTMENT
AOeo0Ano0
OOOO
HOoGOOUmmL
1.
Enter
into
the
‘Geometry’
service
menu.
—
_
PIN
PHASE
(
2
Select
and
adjust
each
item
in
order
to
obtain
the
optimum
image.
—
—_
CORNER
PIN
GEOMETRY
V
centre
Adj
=.
—
NAGE
V
size
Adj
(
V Lin Adj
S Corr Adj
H Cent Adj
H Size Adj
Pin Amp Adj
Corner Pin Adj
Pin Phase Adj
V Bow Adj
V Angle Adj
Upper V Lin Adj
Lower V Lin Adj
Left HBLK 07
Right HBLK 07
CD
Mode
(AV)
01
(
22
.