TM 1-1520-238-T-5
8–46
Change 5
8–10.
ENGINE INSTRUMENTS – MAINTENANCE OPERATIONAL CHECK (cont)
8–10
M68-058
EMERG BATT
ENG INST
Figure 8–31.
CPG Circuit Breaker Panel 1
NOTE
Troubleshooting procedures isolating the vertical scale and digital
readout of engine 1 or 2 are the same. Follow instructions pertaining
only to applicable display of engines 1 or 2, where indicated.
DGT OFF/NORM/TST switch located on the dim/test panel
(fig. 8–32), is a momentary switch. When DGT OFF/NORM/TST switch is
placed in TST position, all engine instruments vertical scale indicators
light for three seconds and all the digital readouts remain lighted as long
as the switch is held in TST position.
M68-056
DIM CONTROL
DGT OFF / NORM / TST SWITCH
AUX PWR INDICATOR
Figure 8–32.
Dim /Test Panel
Task
Result
c. On pilot dim/test panel (fig. 8–32), set DGT
OFF/NORM/TST switch to NORM and
manual DIM control to midposition. Check
AUX PWR indicator on dim/test panel.
If AUX PWR indicator lights, go to paragraph 8–15.
