New Holland T8010 Manual page 1327

Symptom
Noisy reception, FM only
Poor quality/distorted sound
- one or more speakers
Poor quality/distorted sound
from all speakers
No sound from speakers
Section 55 - Electrical System - Chapter 1
Possible Cause
Antenna
Audio unit
Poor reception area
Audio speaker
Circuit
Audio unit
Audio speakers
Circuit
Audio unit
Speakers
Circuit
Audio unit
55-1-146
Reference/Test
G - Antenna Test
If G - Antenna Test is good,
audio unit is bad.
H - 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.
H - 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.
H - 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.