b. Test Setup. The encoder and data link
Encoder and Data Link Control
physical tests given in table 3-3 prior to connecting the
a. Tools and Test Equipment Required. The
equipment in the test setup.
tools and test equipment required for troubleshooting the
Figure 3-1. Encoder and data link control test setup.
c. Preliminary Control Settings.
d. Testing and Troubleshooting Procedures.
equipment controls as follows prior to beginning the
The first step in troubleshooting the encoder and data
functional test procedures:
link control is to perform the functional test procedure
given in table 3-1. Then, when a fault indication is
obtained, locate the appropriate MALFUNCTION in table
3-2 and continue
Data link control:
INSPECTION and CORRECTIVE ACTION columns of
the table. Test the repaired circuit card or replacement
Test Set, Electronic Systems
circuit card or component before installing it in the
TS-3796/UKM-4 (control interface
encoder. Then retest the encoder with the repaired or
new circuit card or component installed.
UNIT TEST ENC
Table 3-1. Encoder and Data Link Control/Functional Test
a. Observe ENCODER and RT
a. Indicators are off.
FAULT indicators on data link
b. Observe encoder ELAPSED TIME
b. Blower operates
c. Observe encoder ELAPSED TIME
c. Meter operates as indicated by small tab
pulsating in meter face
Observe RT FAULT, ENCODER
RT FAULT and ENCODER FAULT
FAULT, and BITE IN PRCS
indicator lamps illuminate for
indicator lamps on the data link
approximately3 seconds. And then go
off. BITE IN PRCS indicator lamp stays
illuminated 3 additional seconds and
then go off
Change 1 3-2