TM5-1260-206-34
MAINTENANCE PROCEDURES
Section V.
2-12. GENERAL - Table 2-8 is a summary of maintenance tasks for the APPS
system. It identifies the item to be serviced, action, and location of the
maintenance procedure associated with each task. Tables 2-9 through 2-11
provide the DS/GS personnel with all authorized system level maintenance
procedures for the APPS.
APPS Maintenance Summary
Table 2-8.
ACTION
PROCEDURE
ITEM TO BE SERVICED
Performance
See
1.
System
See
table 2-9, step 1.
2.
System
Coarse alignment
Fine alignment
See
table 2-10, step 1.
X-axis
3.
Fine alignment
See
Y-axis
4.
Removal
See
table 2-11, step 1.
Chassis connectors
5.
See
table 2-11, step 3.
Replacement
6.
Chassis connectors
See
table 2-11, step 5.
Removal
7.
Cable connectors
Replacement
See
table 2-11, step 7.
8.
Cable connectors
2-13. ALIGNMENT - Performance of the alignment procedures given in tables 2-9
and 2-10 is seldom required. Alignment may be needed if the X STD and/or Y STD
readings obtained from the X-Y Plot diagnostic are out of tolerance or if the
Analog (A) card has been replaced.
Prior to performing an alignment, this diagnostic should be repeated to ensure
that an alignment is required. Depending upon the results of the X-y Plot,
the X- and Y-axes can be aligned separately. The procedure is a two-stage
process: coarse alignment and fine alignment.
a. Coarse Alignment - The coarse alignment contained in table 2-9
aligns the Analog (A) card to the OMS data grid and the data grid to the base
plate. Tt must be performed for the X- or Y-axis or both before continuing
with the fine alignment.
b. Fine Alignment - The fine alignment contained in table 2-10 ensures
that the actual and computed distances that the photo-carriage travels are
the same.
2-28
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