Figure 3-11. Frequency-Time RecorderRD-88A/TMQ-5, Front View of Operating Controls and Panel.
wires, or signs of burning. Replace where required
3-12. Check Chart Speed
Using the stopwatch and two measured marks on the
d. Check mechanical security of all connectors,
chart insure that the chart will move exactly 71?
connector brackets, and cable clamps. Tighten where
inches in 15 minutes of a powerline frequency of 60
Hz. (Set multispeed recorders to inch per minute.)
If the chart speed varies more than 5 percent, send
3-15. Clean Interior of Control Panel
the unit to direct support maintenance for chart
drive motor replacement (para 4-10).
Clean the control panel interior using a vacuum
cleaner and a soft brush. Use the soft brush to loosen
3-13. Slide-Wire Contacts Check
any foreign matter around the contacts of switch
Check the condition of the slide-wire contacts. If ei-
S202 and plugs P201 and P202; then remove the
ther is worn halfway through, replace and adjust
loosened material with the vacuum cleaner.
3-16. Clean and Inspect Signal Data
3-14. Clean and Inspect Interior of Cabinet
a. Unlatch all components and remove them from
a. Clean the interior of the signal data converter
using a vacuum cleaner. Remove any deposits using
b. Clean the interior of the cabinet with a vacuum
a lint free cloth and isopropyl alcohol.
c. Inspect all cables and connector for frayed