Preparations; Deflection System Adjustment; Adjusting The Horizontal Oscillation Frequency - Sony Trinitron PVM-1353 Service Manual

PVM-1353MD/1453MD
I
I. Preparations
I
*
When composite video or component signals are supplied from connector CN301, they must be supplied taking into account the effect of
the Q board as indicated on the right.
The levels of the signals supplied must be within
±
2% of the standard on the right.
Signal
Signal Contents
Standard Level
(Pedestal-White)
!00%WHITE 0.714V
358NT
75%WHITE 0.536V
BURST
COMPOSITE
(GREEN)
286mV (632mV)
(This item only P-P)
VIDEO
(75% COLOR BAR)
100%WHITE 0.7V
75%WHITE 0.525V
PAL
PAL BURST
(GREEN) 300mV (664mV)
(This item only P-P)
100%WHITEY
0.7V
75%WHITEY 0.525V
BETAO
75%COLOR
B-Y.R-Y
0.7V
COMPONENT
(This item only P-P)
(75% COLOR BAR)
!00%WHITE Y 0.7V
75%WHITE Y 0.525V
SMPTE
75%COLOR
B-Y, R-Y 0.525V
(This item only P-P)
*
In this document, terms inside boxes ....
I __
__.!
are names of
service mode adjustments.
Example j60H-FREQj
*
CONT 80% is the center click position for the user control.
In.
Deflectlon System Adjustment!
1. ADJUSTING THE HORIZONTAL OSCILLATION
FREQUENCY
1. Input a 525 monoscope signal.
2. Set:
CONT······ 80%
BRT······ .. ·50%
3. Put the unit into service mode.
4. Drop A board IC507 Pin I to ground with a 100µ/16V
electrolytic capacitor. (Ground must use CNSOS Pin 3.)
Or plug the H-FREQ tool into CNSOS.
5. Adjust j 60H-FREQ j so that the diagonal lines on the screen
become vertical lines. (Fig. 1)
6. Input a 625 monoscope signal.
7. Adjust j SOH-FREQ
!
so that the diagonal lines on the screen
become vertical lines. (Fig. I)
-39-
Reduction Connector Feed Level
Ratio (Pedestal-White)
93% 0.664V
93% 0.498V
94% (94%) 269mV (594mV)
94% 0.651V
94% 0.488V
94% (94%) 282mV (624mV)
94.8% 0.664V
94.8% 0.498V
94.8% 0.664V
94.8% 0.664V
94.8% 0.498V
94.8% 0.498V
~100 µ/16V
~
H-FREQtool
Fo: Low Fo :Optimum
Fig. 1
Fo: High