Focus Adjustment; Horizontal Phase, Vertical Linearity, And Height Adjustments - HP 1652B Getting Started Manual

4. Adjust the sweep board SUB BRIGHT control to the lowest setting of
brightness where the menu is still visible on the CRT screen.
High voltages exist on the sweep board. Avoid contact with the sweep board when
making CRT adjustments.
5. Adjust the rear-panel INTENSITY control to bring up the intensity level on
screen. Screen intensity should be at a comfortable viewing level and the
position of both adjustments should be close to mid-range.
I
Note m
Setting the intensity level excessively high may shorten the life of the CRT. For
optimum usage, set the intensity as low as possible while maintaining a comfortable
viewing level.
Focus Adjustment
Horizontal Phase,
Vertical Linearity,
and Height
Adjustments
I
Note !!b
3 .
4.
5 .
1.
2.
Press RUN and then STOP.
Adjust the sweep board CONTRAST control so that the error message is
easily seen.
Refer to the previous figure 4-2 for the adjustment locations.
Press the DISPLAY key to place the
Timing Waveforms
menu on the screen
of the HP 1652B/l653B.
Adjust the sweep board FOCUS control for sharp pixels in the center of the
screen menu. Then note the FOCUS control position.
Adjust the sweep board FOCUS for sharp pixels at the corners of the screen.
Then note the FOCUS control position.
Set the sweep board FOCUS control for mid-position between the two
positions noted in steps 3 and 4 for best over-all pixel focus.
Refer to the previous figure 4-2 for adjustment locations.
Press DISPLAY to place the
Timing Waveforms
menu on the screen of the
HP 1652Bfl653B.
This menu is used because it has characters and lines throughout the menu which
are watched during the procedures. Any other menu may be used, however, the
adjustments may not be as accurate.
3. Adjust the sweep board H. PHASE control to center the menu horizontally
on the CRT screen.
4. Adjust the sweep board V. LIN control so that the top and bottom rows of
text are equal in height. Text height should be approximately lmm.
5. Adjust the sweep board HEIGHT control so that the screen menu top and
bottom borders are equal in width to the side borders of the menu.
HP 16528/1653B
Adjustments and Calibration
Service Manual
4-S