ARMY TM 5-6675-308-34
MARINE CORPS TM 08837A-34/2
Table 4-6.1. Computer Diagnostic/Alignment Program Using Tape Reader, Part No. 877406-2 - Continued
Malfunction
indication/corrective action
Test procedure
Normal indication
2a. Press PADS ON/OFF switch-
PADS ON/OFF switch-indicator PADS ON/OFF switch-indicator
does not light: Computer power
indicator to on
lights. PARITY ERROR indicator
supply malfunction. Remove and
may light
troubleshoot in accordance with
IMU FAIL indicator lights. COMP Defective computer: Measure resis-
tance, with m u l t i m e t e r on
indicator may light
10 kilohm scale across computer
thermostatic switch S1. If less than
500 ohms, disconnect lead going to
500 ohms replace thermostatic
harness short between E23 and E50.
If shorted, repair or replace as
required
ohms, replace I/O discrete card A9,
then data buffer card A6
E23, XA6-007, and XA9-003. Re-
pair if open
If comma does not oscillate, measure
Comma in computer time totalizing
the voltage across the time totaliz-
meter M1 oscillates
ing meter. If greater than 105 VAC,
replace time totalizing meter. If less
than 105 VAC, check wiring
NOTE
The following step will be an aid in
determining memory unit type if
unknown.
2b. Press EXECUTE switch-in-
EXECUTE switch-indicator lights
EXECUTE switch-indicator flashes.
Replace cards in sequence given:
dicator to on
TTY prints out:
Control no. 3 circuit card assembly
PADS SOLID STATE DIAGNOS-
A5
TIC ALIGNMENT PROGRAM
I/O discrete circuit card assembly A9
PROGRAM CHECKSUM XXXXXX
Control no. 2 circuit card assembly
SELECT TEST MODE
A4
Control no. 1 circuit card assembly
This indicates solid state memory.
A3
4-11 step 2d, or 4-14.1 step 2c. Bypass
16-bit data circuit card assembly A2
further loading procedures unless a
new program load is required. If a
If incorrect checksum, continue with
new program load is desired, pro-
step 2c
Change 6
4-54.5