Case IH AFX8010 Repair Manual page 1738

Symptom
Poor quality/distorted sound
from all speakers
No sound from speakers
Transceiver Power Outlet not
operating
BODY AND STRUCTURE - USER PLATFORM
Possible Cause
Audio speakers
Circuit
Audio unit
Speakers
Circuit
Audio unit
Circuit
E.34 / 36
Reference/Test
B, C, D, E - Speaker Resistance
Test
Substitute known good
speaker(s).
Perform relevant speaker circuit
test(s).
If speaker(s) and circuit(s) are
good, audio unit is bad.
B, C, D, E - Speaker Resistance
Test
Substitute known good
speaker(s).
Perform relevant speaker circuit
test(s).
If speaker(s) and circuit(s) are
good, audio unit is bad.
A - Audio system power and
ground supply test.