Operating instructions

5-11
2.11 Troubleshooting Charts
MCU
Power Up
Alert Tone
OK?
YES
Read Radio
OK?
Check USB
circuitry and
setup
Reprogram
correct data
Volume
knob
function?
NO
Speaker
OK?
Check volume
knob circuitry
NO
YES
Replace
Speaker
NO
Int & Ext
Spkr short to
Gnd?
YES
Check Speaker
circuitry, if no problem,
replace MAKO
YES
NO
Termination
short
together?
NO
YES
Spkr contact
voltage
=3V?
NO
YES
A
YES
NO
Troubleshooting Flow Chart for Controller
(Sheet 1 of 2)