TM 11-6625-3081-23
7-36. PARALLEL BUS
7 - 3 6
INPUT CODE:
PLLBUS (cont)
c. PARALLEL BUS FAILURE
1. VDT DISPLAY
PERFORM THE FOLLOWING REPLACE ACTIONS IN THE ORDER LISTED. (REFERENCE
TM 11-6625-3081-23 FOR REPLACEMENT PROCEDURES.)
REF. DES.
PART NO.
NAME
1. 1A11A12
13081431
PARALLEL I/O CCA
2. 1A11A9
13081742
INTERFACE CCA
3. 1A11A13
13081483
BUFFER CCA
4. 2A2A7A6A7
13082714
BUS MUX CCA
5. 2A2A7A6A5
13082717
FIFO CCA
6. 1A4PS4
BKF-5-11
5-VOLT PS
7. 1A11
13231746
DIGITAL COMPUTER ASSY.
2. CORRECTIVE ACTION - PLLBUS
(a) Remove Parallel I/O CCA 1A11A12. Check contacts of mating connectors
and repair if required.
Install replacement 1A11A12 and perform PLLBUS
test.
If PLLBUS test passes, no further action required. If PLLBUS
fails,
(b) Remove
repair
test.
fails,
(c) Remove
repair
test.
fails,
(d) Remove
repair
test.
fails,
(e) Remove
repair
test.
fails,
proceed to (b).
Interface CCA 1A11A9. Check contacts of mating connectors and
if required.
Install replacement 1A11A9 and perform PLLBUS
If PLLBUS test passes, no further action required.
If PLLBUS
proceed to (c).
Buffer CCA 1A11A13. Check contacts of mating connectors and
if required.
Install replacement 1A11A13 and perform PLLBUS
If PLLBUS test passes, no further action required.
If PLLBUS
proceed to (d).
BUS MUX CCA 2A2A7A6A7. Check contacts of mating connectors and
if required.
Install replacement 2A2A7A6A7 and perform PLLBUS
If PLLBUS test passes, no further action required.
If PLLBUS
proceed to (e).
FIFO CCA 2A2A7A6A5. Check contacts of mating connectors and
if required.
Install replacement 2A2A7A6A5 and perform PLLBUS
If PLLBUS test passes, no further action required.
If PLLBUS
proceed to (f).
7-185
