Sony Tektronix WFM 1125, Service Manual

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Adjustment Procedures
5-4
WFM 1125 Option 0A/0B/0C/0D Service Manual
NOTE
. Use the variable resistors described in the parenthesis for the instrument
with serial number J310171 and above.
3. Connect the power cord, and turn on the power switch on the rear panel.
H
When R64 : BLACK (R454 : BRIGHT) is turned clockwise to brighten
the whole area of the CRT, confirm that there are no chips or unevenness
on the phosphor.
4. Press the INTEN/MENU button while holding down the lowest bezel button
to enter into the DIAG/CAL menu.
Yoke Alignment.
5. Select EXECUTE
!
DISPLAY
!
WHITE from the menu.
a. Adjust R15 : H.PHASE (R452 : H.PHASE) to center the bright video
area in the background area.
b. Loosen the screw retaining the deflecting yoke to place the CRT display
horizontally. This adjustment is not available for instruments with serial
number J310171 and above.
Size And Linearity.
6. Press the MENU button and then select GRID from the menu.
The grid pattern (crosshatch pattern) appears on the screen.
H
Check the distortion of the external frame and the declination from the
CRT face, and the inclination about the grid pattern. No specifications
are required.
a. Align the horizontal and vertical positions in place using the centering
ring behind the deflecting yoke.
b. With R43 : V.SIZE (R352 : V.HEIGHT), set the vertical size to 71 mm.
c. With R48 : V.LIN (R353 : V.LIN), adjust the linearity on the top and
bottom area on the CRT face. If necessary, use R43 and the centering
rings for readjustment.
d. With L4 : WIDTH (L403 : WIDTH), set the horizontal size to 95 mm. If
necessary, use R43 (R353) and the centering ring for readjustment.
NOTE
. The centering rings may cause some distortion to the display. Adjust the
centering rings for the least amount of distortion and the best centering.