Hytera PT580, Service Manual, Page: 34 / 104

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