28 System Fault Finding T2004 Multi-Control Head System Manual
© Tait Electronics Limited May 2004
7 System Fault Finding
Problem
System will not power up, all heads appear dead.
Suggestion
■ Check radio has power connected and two micromatch connectors on
the interface board are not reversed.
■ Check pin 1 of interface board SK3 appears at J5 pin 1 at control heads.
SK3 pin 2 connects to J5 pin 2 etc.
■ Check for 13.8V at control heads.
■ Check Primary head is correctly fitted and turned on.
Problem
System will not power off.
Suggestion
■ Check all multi-drop wiring for shorts or faults.
■ Check only one Primary head is installed.
Problem
Head displays information but keypad, mic, etc. are dead.
Suggestion
■ This happens for ten seconds after power up on Secondary heads only.
■ If condition is permanent check data pair 2A/2B paying attention to
polarity.
Problem
Transmit/ Receive audio is very quiet.
Suggestion
Check for cable losses or faults. Max multi drop line length is 2km.
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