TM 1-1520-238-T-6
9–635
9–331. PILOT AND CPG CAUTION/WARNING PANELS – INDICATORS
9–331
FUNCTIONAL DATA (cont)
NOTE
If referenced out of one paragraph or volume into another for additional
troubleshooting, upon completion of the task, return to the maintenance
operational check for the original paragraph or volume.
1. Use caution/warning panel functional data as follows:
Task
Result
a. On pilot caution/warning panel (fig. 9–210),
remove P18. Apply input signal to pilot panel
input pin numbers.
For example: ASE indicator (pilot lamp
key F2), supply ground at pin (A157)J1-46.
Check that ASE indicator is lighted.
If indicator does not light, replace lamp
(TM 1-1520-238-23). Apply input signal to pin. Check
that indicator is lighted. If replaced lamp still does not
light, replace pilot caution/warning panel
(TM 1-1520-238-23).
b. On CPG caution/warning panel (fig. 9–211),
apply input signals through P18 pins to
indicators that receive input signals from
pilot caution/warning panel, or directily to
CPG caution/warning panel input pin
numbers. For example: IFF indicator (CPG
lamp key A4), apply 28 VDC at pin P18-117.
Check that IFF indicator is lighted.
If indicator does not light, detach P19 from CPG
caution/warning panel. Apply input signal to CPG
panel input pin. For CPG IFF indicator, apply 28 VDC
at (A157)J1-1. Check that IFF indicator is lighted.
If indicator is lighted, check for short or open in wire
between pilot panel output pin (P18) and CPG panel
input (P19). For CPG IFF indicator check for open
between P18-117 and P19-1, check for short between
ground and P18-117. Repair shorted wire.
If indicator does not light with input signal applied
directly to CPG panel, replace lamps
(TM 1-1520-238-23). Apply input signal to pin, check
that indicator is lighted. If lamps still does not light,
replace CPG caution/warning panel
(TM 1-1520-238-23).
