Motorola APX 1000 Detailed Service Manual page 783

Troubleshooting Charts: RX Audio Error
Internal Audio
No audio out of
Main Speaker
Verify Audio signal
present at Main
speaker
Is signal
present?
No
Check audio signal
at TP6405 and
TP6406
Is data
present?
No
Verify Audio signal
present at C6430
and C6431
Yes
Is data
present?
No
Check Audio Codec
U6405
Yes
Replace Main
speaker
Verify all connectors
Yes
from J2302 to
frontkit flex is good.
Check continuity.
Verify V_SW_5 is present.
If yes, check U6411
circuitry. Replace U6411 if
all is good.
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