Sony TRINITRON KV-A2121D - Page 25

peace ean
(RV301 and L303)
1.
Input
a
SECAM
color
bar
signal.
Rveo1
@
Connect
the
oscilloscope
to
pin
@®
of
IC304.
ST-BY
+B
ADJ
Adjust
RV301
until
the
white
and
black
sections
of the waveform at pin @ are at the 0 level.
poet the cecilloseope Ke pin @ of mei ~_ © he
4.
Adjust
L303
until
the
white
and
black
sections
of
©
the waveform at pin @ are at the 0 level.
RV502
H.PHASE ADJ
D BOARD (COMPONENT SIDE)
ae +B ADJUSTMENT (RV501
{
1.
Connect
the
digital
multimeter
to
TP91.
(white part) (black. part) (white and black levels
should
become
0
level)
2.
Adjust
RV501
to
obtain
135+0.2V.
1.
Put
the
system
into
()
standby
mode
(remote
commander).
(Before
Adjustment)
(After
adjustment)
2.
Connect
the
digital
multimeter
to
TP91.
3.
Adjust
RV601
to
obtain
135+3V.
a
Take the system out of () standby mode (remote
commander).
SECAM TRAP (L312
- Input a SECAM color bar signal.
Connect
oscilloscope
to
Q340
emitter
and
adjust
H.PHASE
ADJUSTMENT
(RV502
L312
to
minimize
color
carrier
on
the
Y-signal.
Input
a
PAL
color
bar
signal.
wo
no eS
Set the picture and brightness controls to their
normal levels.
=%
ae.
.
Set
RV1508
(H.CENT)
to
its
mechanical
center.
4.
Connect
the
oscilloscope
to
pin
@
(SCP)
of
IC
501.
Rotate RV502 to adjust to H+0.1ys.
w
on
er
1. Input a NTSC (3.58) color bar signal.
2. Connect oscilloscope to Q340 emitter and adjust
L308 to minimize color carrier on the Y-signal.
Standard of H. PHASE
= 9G Ss