No Audio From Speaker - Hytera PT580 Service Manual

No Audio from Speaker

No audio from
the speaker
Check whether the
transmitter is normal. [1]
N
o
Check whether the main
board is damaged. [2]
No
Check whether the
speaker and the cable
are normal. [5]
Check U7215 or U7202
is normal. [6]
Yes
Check whether U7201
outputs audio.
No
Check whether the PA
works normally. [7]
Yes
Check the 70-pin
connector on the MMI
board is normal.
Yes
Check the parts
between J7001
and U7201.
Refer to the section
Yes
"No Audio during
Yes
No
Replace the
speaker or cable.
Yes
No
Replace U7215
or U7202.
Check the parts
Yes
between the PA
and the analog
No
Repair U7201.
No
Repair J7001.
Talk".
Check whether
the I/Q signal is
normal. [3]
Check whether
the MIC signal input to
the baseband processor
is normal. [4]
processor.
switch.
32
Service Manual
No
Yes
No
Yes
Check the
baseband
Refer to the
section"RF
POWER
Circuit".
Check the 70-pin
socket and the
related parts.