12-23. OPERATIONAL CHECK. continued
Step 2. SELF-TEST.
a. Remove DMM probes.
Set test adapter:
b. Listen to handset for alarm tone.
c. Observe RCU display.
d. Adjust DIM control fully CCW, and then fully
e. Set RCU:
a. RCU display reads:
If not, go to chart 3. Then, the RCU
If not, the control module (19A2) is bad.
b. Alarm tone is heard in handset. If not, go
to chart 4.
c. HUB LOW is off. If not, go to chart 5.
d. RCU display dims until off (CCW), and
then brightens (CW). If not, go to chart 6.
e. RCU display reads:
if not, go to chart 7.