Picture Phase Adjustment; H Blanking Adjustment; V Blanking Adjustment - Sony TRINITRON PVM-14M2U Service Manual

4. Connect the IC507
<D
PIN on the A board to GND via the l 00µ/
16V chemical capacitor. (Use CN505@PIN for GND.) Or in-
sert the H-FREQ jig into CN505.
100µ/16V
Flg.5-1 H-FREQ Jig
5. Adjust
!60
H-FREOI so
that the slanting lines on the screen will be
vertical. (Fig.5-2)
6. Input a 625 monoscope signal.
7.
Adjust
~o
H-FREOI
so
that the slanting lines on the screen will be
vertical. (Fig.5-2)
Fo:Low
Fo:Optimal
Flg.5-2
2. H BLANKING adjustment
1. Input a 525 monoscope signal.
2. CONT ... 80%
BRT .... 50%
3. Set the unit in the service mode.
Fo:High
4. Observe the anode ofTP300 or D516 with an oscilloscope, and
adjust
IH-BLANKINGI
so that the waveform will be as shown in
Fig.5-3.
6V
9.3±0.1 µS
Flg.5-3
3. Picture phase adjustment
1. Input a 525 monoscope signal.
2. Set the unit in the UNDER SCAN mode.
3. CONT ... Min.
BRT .... Max.
4. Set the unit in the service mode.
5. Adjust
!U/N H-SJZB!
so that the white frame of the monoscope will
be approx. 1 cm to the inside of the effective screen.
6. Tum RV501 (H-CENT) so that
B
= B'.
7. Adjust
!60 VIDBO PHASE!
so that the signal area will be in the cen-
ter (A= A') of the deflection area. (Fig.5-4)
8.
Input a 625 monoscope signal.
9. Adjust !50VIDBOPHASB! in the same manner.
Deflection area
Signal area
Effective screen
Flg.5-4
4. V BLANKING adjustment
1. Input a 525 monoscope signal.
2. Set the unit in the UNDER SCAN mode.
3. CONT ... Min.
BRT ... Max.
4. Set the unit in the service mode.
A=A'
B=B'
A'
B'
---
5. Adjust
!V-BLANKINO<60>!
so that the white frame in the upper
section of the monoscope will be about to be blanked.
Note : Blanking up to the point lH away from the white frame is
permissible, but the adjusting center should be up to the
point 0.5H away from the frame.
6. Cancel the UNDER SCAN mode, and set the unit in the normal
16:9mode.
7. Adjust
!16:9BLANKING START<60>!
and
!16:9 BLANKING BND<60>
I
so
that the number of frames in the vertical direction in the lumi-
nous section of the screen will be 11. 7 4 and the BLK quantity at
the top and bottom
will be
the same.
Note : Make adjustment before 16:9 V-SIZE adjustment.
-28-