G2 Adjustment; White Balance Adjustment - Sony trinitron PVM-1450QM Service Manual

PVM-1450QM/1454QM
3. The pattern below can not be corrected by turning the neck.
~
000
\II
o........._
/0
g..-
0
-0
/I\
....._o
coo
RGB
G (G)
(G) G
000
000
R
B
og RB
(G)o
(G)gRB
Go
R
B
3-7. G2 ADJUSTMENT
R
G
B
1. Input a 525 monoscope signal.
*
Gun rotation
The beam is twisted at both
sides on the X axis and Y
axis.
*
HCR large (small)
At both sides of the screen,
the G raster horizontal
component is wider
(narrower) than those of the
R
and
B
rasters.
*
VCR large (small)
At both sides of the screen,
the G raster vertical
component is wider
( narrower) than those of
the R and B rasters.
2. Connect the oscilloscope to A board TP403.
3. Of the three reference pulses, measure the lowest one.
4. With the Screen VR, adjust so that left end of the waveform
is : 1.35 Y
±
0.05
1.35V
(V SYNCHRONIZA T/ON)
----------'----GND
Since the wavefom1 is
triangular as shown on
the left, adjust the left
end to be 1.35 Y.
ABOARD
TP403
(COMPONENT SIDE)
3-8. WHITE BALANCE ADJUSTMENT
For measuring equipment, use a color analyzer. (for example from
Minolta, etc.)
For the PVM-1450QM, !terns 7, 8, 14, 15 and 16 are not
necessary.
l. Input a 525 monoscope signal.
(Input from Line A or Line B, with no burst.)
2. Set:
CONT .. ···· 0%
BRT ......... 50%
3. On a 20-tone gray scale, adjust service modelSUB BRIGHT/
so that
0 and 5 IRE___,. cut off
10 IRE__,. slight glow
4. Input 525 all-wh.ite (no burst, composite signal).
5. Set CONT to 80%.
6. Adjust the all-white signal luminance so that the screen
luminance is 3 NIT.
7. Press MENU and select COL TEMP/BAL.
8. Select 6500 K.
9. Put the unit into service mode. (*I)
*
l : Set
j
3200 K SW
I
to 0 for both 9300K and 6500K.
IO. Adjust to the standard values with \CIT! 6500K BIAS\.
(G must be fixed at "512".) ( *2)
*2 : Adjust the cut-off to be 3 NIT.
11. Switch the all-white signal luminance to I 00 I RE.
12. Adjust to the standard values with \CIT! 6500K GAIN\.
(G must be fixed at "700" .)
13. Repeat Items 10, 11 and 12 until the adjustment is complete,
then write t]:le adjustment data.
14. Press MENU and select COL TEMP/BAL.
15. Select 9300 K.
16. In the same manner as in Items 10, 11, 12 and 13 make the
/C!T2
9300K BIAS /and
/C!T2
9300K GAIN /adjustments.
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