OTS Aquacom MK2-DCI User Manual page 15

PROBLEM
No record-out function
Weak output to divers
and tender
Distorted unintelligible
speech
Cannot cross-talk
divers
Tender-to-diver faulty
in two-wire mode
PROBABLE CAUSE
Defective pre-amp
chip
Open trace on board
PTT logic circuits
defective
Weak battery
Microphone pre-amp
circuit defective
Board connector not
making contact
Defective record amp
Power amplifier
defective
Defective component
that supports the power
amplifier is defective
Bias supply faulty
Defective cross-talk
switch
Defective relays
CPU defective
Defective PTT switch Replace PTT switch
Defective relays
Defective CPU
12
REMEDY
Replace
Repair trace or
replace board
Repair or replace
board
Charge (if
rechargeable) or replace
Trace signal to find
fault and replace
defective part
Clean pins or replace
defective connector
Trace fault around
record op-amp and
replace faulty part
Replace board
Replace power
amplifier chip
Trace part and replace
Check supply and
replace defective part
Replace cross-talk
switch
Replace relays
Replace CPU
Replace relays
Replace CPU