Writing Model Data; Picture Output; Landing Adjustment - Sony trinitron PVM-1450QM Service Manual

PREPARATIONS (2)
*
When composite video or component signals are supplied, they
must be supplied as below.
Signal Signal Contents
Standard Level
P-W
100%WHITE 0.714V
75%WHITE 0.536V
358NT
443NT
BURST
268mV
(GREEN)
(623MV)
COMPOSITE
(This item only P-P)
VIDEO
100%WHITE 0.7V
75%WHITE 0.525V
PAL
SECAM
PAL BURST
300mV
(GREEN)
(664mV)
(This item only P-P)
100%WHITEY 0.7V
75%WHITEY
0.525V
BETAO
75%COLOR
B-Y. R-Y 0.7V
(This item only P-P)
COMPONENT
JOO% WHIT!: Y 0.7V
75% WHITEY
0.525V
SMPTE
75%COLOR
B-Y.R-Y 0.525V
(This item only P-P)
*
In this document, terms inside boxes
c:=J
are names of service
mode adjustments.
Example
I
60H-FREQ
*
After making adjustments in service mode, write the adjustment
data before cutting off the power. If you cut off the power
without writing, the results of your adjustments are all lost.
*
Standard inspection conditions
Unless specifically specified otherwise in this document. the
following conditions are used for adjustments and inspections.
APERTURE MIN
BRIGHT
CHROMA
PHASE
CONTRAST
VOLUME
50% (Center click)
50% (Center click)
50% (Center click)
80% (Center click)
50%
PVM-1450QM/1454QM
3-2.
WRITING MODEL DATA
I.
In service mode, write in the following model data at No. 114
!MODEL!.
PVM-1450QM
PVM-1454QM
l
0
2. In service mode, write in the following data at No. 115
I
COLOR TEMP DISP I , .
PVM-1450QM/1454QM 65
3. In service mode, write in the following data at No. 116
!COLOR TEMP DISP
21.
PVM-1450QM/1454QM 93
3-3. PICTURE OUTPUT
l. Set the AC input voltage.
(l)
Input the video and audio signals to the corresponding
terminals on the connector panel.
(2) Set the sliduck AC voltage as shown on the right. (*l-1)
Model
PVM-!450QM/1454QM
Voltage
AC220
±
3V
(Distortion rate:
3%
or
less)
3-4. LANDING ADJUSTMENT
I.
Preparations
I) To reduce the influence of geomagnetism, face the set's CRT
screen east or west.
2) Loosen the deflection yoke fixture and lower the deflection
yoke to the rear.
3) Switch on the Power switch and degauss with the degausser.
4) Adjust the deflection yoke tilt.
2.
Adjustment
I) CONT······
MIN
BRT ......... Position providing good vision
2) The rough adjustments of the white balance, G2, and
convergence must be completed already.
3) Set green-only.
4) Adjust the purity knob so that the green comes to the center
of the screen. Make the red and blue about even. Fig.
I
5) Switch to blue only, red only, and green only and verify each.
Fig. !, 2, and 3
6) Bring the deflection yoke gradually forward and adjust the
deflection yoke so that the R and B at both sides of the screen
become green. Fig. 2-" 3
7) If the deflection yoke comes too far forward, you will see the
pattern shown in Figure 4. If that happens, lower the
deflection yoke to the rear. Fig. 4 --;. 3
8) Switch the single color switch to
B
and verify the single
color. Fig. 6
9) Switch the single color switch to R and verify the single
color. Fig. 9
10) When one of the colors does not become the single color
correctly, check by repeating Items 7 and 8 based on the
single color not coming into adjustment.
If you can not obtain landing in the corners, paste on
magnets.
11) Switch to an all-white signal and check the uniformity.
12) When the deflection yoke position is determined, fasten it
with the fixture.
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