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Measuring
_
r
No.
it em
instrument
Test point and Adjustment part
Description
4
[va
R,G,B | Oscilloscope | (F12) (TPB) R241 (INDOOR _| © Set the IRIS CNTROL SWITCH to AUTO
GAIN
H-rate
B SET)
Adjustment
( 10:1
(GP) (TP-R}
R243 (INDOOR
{Note} The AUTO
WHITE
SWITCH
must be
RSET)
set at the "INDOOR" position.
[MOTHER BOARD]
1. Measure
and adjust RO7 (GIN GAIN)
(TP-G)
R07 (G IN GAIN)
so that the portion shown in Fig. 3-14 (a)
Gray scale
[GAMMA
[GAMMA BOARD]
becomes 1Vp-p.
pattern
BOARD}
Vp-p
{H)
Fig. 3-14 {a}
2. Measure
and adjust R241(INDOOR B
SET) so that the portion shown in Fig. 3-14
(b) becomes 1Vp-p.
Fig. 3-14 (b)
3. Measure 13) and adjust R243 (INDOOR R
SET) so that the portion shown in Fig. 3-14
(c) becomes 1Vp-p.
Vp-p
(H)
Fig, 3-14 (c)
S#i
—e
(No. 5550) 27E
Measuring
T
instrument
Test point and Adjustment part
Description
]
WHITE
BALANCE
Adjustment
COLOR ¥ | Oscilloscope
'| vipeo OUT
(ey)
10:1
Gray scale
pattern
ee
bes :
= e bell
tae ir |
R GAIN BGAIN
Vectorscope
| VIDEO OUT
Gray scale
pattern
28E (No. 5550)
R15 (R GAIN)
R18 (B GAIN)
R14 (R-y)
R16 {B-y)
[GAMMA BOARD]
2. Concurrently
observe the oscilloscope, and
Adjustment procedure with oscilloscope
© Set the IRIS CONTROL SWITCH to AUTO
1. Measure
the
VIDEO
OUT,
and
adjust
R15 {R GAIN) and R18 (B GAIN) so that
the carrier at section @ shown in Fig, 3-15
{a) is minimized.
Fig. 3-15 (a)
2. Adjust R14
(R-y) and R16 (B-y) so that
the carrier at section
shown in Fig. 3-15
is rninimized.
3. When carriers remain in the dark sections of
waveforms, repeat 3-12
BLK SET Adjust-
ment."
[Adjustment procedure with vectorscope "|
© Set the IRIS CONTROL SWITCH to AUTO
1. As
shown
Fig. 3-15 (b),
adjust
R15 (R
GAIN),
R18 (BGAIN),
R14 (R-y),
and
R16
(B-y)
so
that
the
carriers
converge
at the center.
Fig. 3-15 (b)
when
carriers
are found
to be remaining
in the dark sections of waveforms,
repeat
"3-12 BLK SET Adjustment."
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