TM 11-5821-333-30
3-10. TROUBLESHOOTING FLOWCHARTS. Continued
CHART 3
Display Reads Continuous Dashes or “FAIL7” (Sheet 1 of 7)
1. SET UP USING FIG 3-7.
2. SET UUT:
FUNCTION
SQ ON
3. CONNECT Xl O PROBE
DIRECTLY TO SCOPE.
GROUND PROBE TO
CHASSIS. SET VERTICAL
MODE: 1 V/div; SET HOR-
IZONTAL MODE: 1 ms/div,
PROBE AT XA4-4.
4. MOVE UUT FUNCTION
SWITCH BETWEEN SQ ON
AND SQ OFF.
NOTE
See figure FO-11 for
location of test points.
YES
REPEAT WITH X10 SCOPE
PROBE AT XA4-18.*
YES
YES
REPEAT WITH X10 SCOPE
REPEAT WITH LOGIC PROBE
PROBE AT XA4-20.
AT XA4-3.
NO
INTERFACE MODULE (A2) IS
*SET: Vertical Mode: 1 V/div
Horizontal Mode: 5ms/div
BAD.
3-38
