Service manual

PV152 2-16 PROJO
CONVERGENCE ADJUSTMENT PROCEDURE
CONVERGENCE POINT ADJUSTMENT
Adjustment preparation
1. Select color to adjust.
“DISPLAY”-Green
“O”-Red
“SOURCE”-Blue
2. Use 4,6,2, and 5 to move the cursor position(dotted
lines).
3. Use cursor buttons to move the convergence point.
4. Three adjustment modes are available:
1. (3x3) Press “DISPLAY” 5 times
(only works when DCU is in uncorrected state).
2. (7x5) Press “O” 5 times
3. (13x9) Press “SOURCE” 5 times
For touch-up, only the (13x9) mode is necessary.
This will adjust every cross-hatch intersection point
on the screen.
For complete adjustment, start with (3x3) mode. This
will adjust center point and eight edge points only,
but will greatly reduce adjustment time. Then use
(7x5) mode, and finally (13x9) mode to finish
convergence.
If “S” distortion appears between cross-hatch lines
repeat (7x5) mode to change calculation process
while adjusting to remove distortion, then return
to(13x9) mode to finish touch-up convergence.
Adjustment procedure
1. Recelive any NTSC signal.
2. Start adjustment at the center of the screen.
3. Continue adjustment at next closest position.
4. Adjust center area first, ending with edge sections.
5. When convergence is acceptable, press “-” to write
data to ROM memory. ROM WRITE? is displayed to
alarm system that ROM will be overwritten with new
data. Press the “-” button again to write displayed
data to ROM.
6. DATA WRITE TO ROM will take approximately 4 seconds
and no picture will be displayed.
7. Green dots will be displayed when operation is
completed.
8. Press MUTE to return to convergence pattern, then
confirm again convergence is acceptable.
9. Press ”-” (ROM write) mode.
HD MODE
Receive any HD signal and repeat progressize mode
procedure.
NOTES:
1. Display only green for easier adjustment and match to
jig screen. Press “MENU”, THEN PRESS “DISPLAY”.
2. Write Data to ROM after green adjustment. Once green
has been confirmed to match jig screen, the jig screen
can be removed. Do not readjust the green color after
jig screen has been removed. This is now your reference
color.
3. Display green and red only and match red to green.
4. Display all colors and match blue to green and red.
Touch-up red color if necessary.
5. Existing DATA in ROM can be read by pressing the SWAP
button 2 times. This data can be used after replacing
a component(CRT,DY,etc.) Where complete convergence
adjustment is not necessary be careful not to overwrite
this data. DO NOT write cleared RAM data into ROM or
a completec convergence adjustment will be necessary.
WARNING: Advanced Convergence Adjustment
Procedure is to be performed only when
replacement of the Small Signal Main Module
or one or more the the CRT’s is replaced.
RASTER CENTERING
1. Press the FREEZE button to enter the Raster Phase
Adjustment Mode. Two additional lines appear, one near
the top, and one near the bottom of the screen.
Press the MENU button to see all colors if the center cross is
other than White.
2. Press the Cursor Keys to match the selected color to
the green at the geometric center of the screen.
3. Press the RECALL, 0, or SOURCE buttons to select the
next color to be adjusted.
0= Red / Green (Yellow)
SOURCE= Green / Blue (Cyan)
RECALL= Green Only
4. Press Freeze button to exit the Raster Phase Mode. (The
two lines disappear)