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CONVERGENCE ADJUSTMENT
1, PICTURE ADJUSTMENT
The adjustment are done on two screens; 50 Hz mode (PAL)
and 60 Hz mode (NTSC). To synchronize correction wave to
each frequency, receive the suitable signal.
1-1. Change of Memory (E7PROM)
Memory of Q713 E?7PROM is nonvolatile, and adjusted data is
stored. Since data in RAM of Q701 is eliminated with power
OFF, the RAMis set by soft command of microcomputer QA01
at every power ON. The adjusted data which is obtained from
screen-watching is once stored in RAM inside QA01. The whole
data in RAM which is corrected on each adjusting point and is
changed, is saved into E*PROM (Q713) as a fixed data. The
data capacity per one screen requires 8k for 50 Hz mode {PAL),
and 4k for 60 Hz mode (NTSC).
8K + OK MENU
Sercive data display
(original picture)
t
Remote
"Hale" key
The first picture
1-2. Service Mode
1-2-1. Outline
Service mode is controlled by software of microcomputer QA01,
and is one of function of set.
This mode is designed so that ordinary user cannot use this,
and special operation is required to use this.
Data change is done by direct shift (cursor display) of adjust-
ing points; 50 Hz mode (PAL) 8 x 8/1 color and 60 Hz mode
(NTSC) 8 x 8/1 color.
1-2-2, To Enter and to Exit
Press MUTE key on remote hand unit twice and keep press-
ing the key, press MENU key of set console.
Then service data will be displayed on top left of screen. Un-
der the condition, press " +/dIe " key on remote hand unit, and
the screen shows crosshatch picture (Later, the first picture),
Press again "41> " key, and the screen changes to cross-
hatch + data display (Later, second picture). This time changed
data are automatically saved
Further, press "4
" key on remote, the screen returns to
original picture.
=e
The second picture
{
Remote
"die "key
+ automatic save
Remote
"adle" key
Fig, 10-1
Adjusting Procedure In Replacing Convergence Unit/Main Def
START
ae Pe
User convergence enter check
Convergence adjustment
No.51281
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