|
| |
TM 55-6695-220-13&P
Table 3-7. Troubleshooting Chart (Contd)
Malfunction
Test or Inspection
Corrective Action
Step 2.
Check for corroded or damaged connector pin, P2, broken wire in Cable W2, or dirty contacts on
temperature switch.
If condition exists replace Cable W1/W2-temperature switch, para. 3-15.
9.
Thermocouple type temperature indicator reads substantially different value at one step of the temperature switch.
Step 1. Check voltage shunt on printed circuit board PC-1 for broken or shorted lead.
If condition exists replace PC-1, para. 3-17.
Step 2.
Check for corroded or damaged connector pin, P1, broken wire in Cable W1, or dirty contacts on
temperature switch.
If condition exists, replace Cable W1/W2-temperature switch, para. 3-15.
10. Pyrometer indicator excitation voltages 12 and 24V are intermittent.
Step 1. Check coarse and fine rheostats for worn wiper.
If wiper is intermittent replace rheostat.
Step 2. Check resistance and voltage function switch for worn contacts.
If contacts are worn, replace switch, para. 3-15.
3-14
|
