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Table 5-4.
Extended Test Equipment Required
Description
Model
*Oscilloscope
Motorola R1004A
*Digital Voltmeter
Motorola R1001A
* RF Signal Generator
Motorola R1201A
*Modulation Meter
Boonton 82AD
Receiver Test Cover
Motorola 15-P01324 V001
Extender Card Set
Motorola 67-P01322V001
*A R2001 A is suitable for use in place of these separate equipments.
5-104.
Preparation for Alignment
1.
All alignments to be performed at normal ambient temperature.
2.
Remove the top cover of the unit to be aligned.
3.
Apply power to the unit to be aligned and allow a warmup time of 15 minutes prior to alignment.
5-105.
Basic Alignment Procedure
5-106.
CRT Astigmatism and Geometry
1.
Select the Monitor Function and the Gen/Mon Mtr Display on the R2001
A.
Set the Intensity Control for
a medium intense display.
2.
While using the Focus Control to maintain a focused display at the center of the CRT, adjust the
Astigmatism and Geometry potentiometers (Figure 5-13) for the best focus at the outer edges of the
CRT while minimizing the pincushion and barrel distortion of the display. The two adjustments are
interactive so that repeated small adjustments alternated between the two potentiometers will be
required to obtain the best display.
liORIZONTAL
INTENSITY
BIAS
TRACE
GEOMETRY ROTATION
Figure 5-13.
Scope Amplifier Alignment Points
INTENSITY
BALANCE
5-23
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