BELINEA 10 55 70, Service Manual

Page: 38 / 80

1.
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VA Version
4.1. Preparing the Display for
Adjustment
Before adjusting any the display settings or making final
adjustments after service, perform the following pre-test set-
tings to prepare the display for adjustment:
1. Be sure to allow the display to warm up for at least 30
minutes before making any adjustments.
2 . When making tests and adjustments, the CRT should be
facing east or west to minimize the affect of the earth’s
magnetic field.
3. Set the contrast control at 80% and the brightness con-
trol at 50% for all tests unless otherwise specified.
4 . Thoroughly degauss the entire screen with a manual
degausser before proceeding with tests.
5. All test should be performed with the rated power
Supply voltage unless otherwise specified.
4.1 Test Equipment Required
The following equipment will be required to the tests
and adjustments detailed in this section:
Video signal and pattern generator
Digital multimeter
Degausser
Data Line
H.
V. Hz)
Pixel
Hor. FP
Hor. Sync
BP
Hor. Active
Total E)
Ver. FP ms(A)
Ver. Sync
Ver. BP ms(C)
Active ms(D)
Ver. Total ms(E)
Primarv mode is
4.2. Adjustment Procedures
42.1. Adjustment Sequence
This display undergoes an automatic alignement procedure
during manufacture. This alignment procedure follows a
sequence of adjustments which are in this section.
When making manual adjustments during service, you should
always make the adjustments in the order given here to ensure
correct results.
422. Preset Timings Used During Adjustment
During alignment it is necessary to input certian preset tim-
ings stored in the display. The detailed parameters of all the
preset timings are given in the table below for your reference.
The preset timings for versions
of
this model may diier from those shown
here. Be sure to check the list of preset
timings for the unit being serviced.
/ A - E - l
,
I
I
c I - n
Table 4-1 Table of preset Timing Parameters
4-1