Hytera PD502, Руководство по обслуживанию, Страница: 100 / 136

UHF1(400-470MHz) Troubleshooting Flow Chart
28
No
Yes
No
Yes
No
No
Yes
No
Yes
Yes
No
Yes
Yes No
No
Yes
Yes
No
No
No
Yes
Yes No Yes
No
Completed
Yes No
No
Yes No
Yes
No
Yes
No power output
Completed
Completed
Completed
Completed
Completed
Power supply works
normally?[1]
Check the
power supply
circuit..
VGG is
normal?[2]
TV/APC is
normal?[3]
Check the DAC
output circuit.
5VA_TX is
normal?[5]
TX_En 3.3V is
normal?[4]
TX_En is
normal?[5]
Replace Q7001
and U7001
Replace Q7009
and Q7010
Check the power
supply circuit.
Power level is
normal?[6]
D7001, spring plate for
antenna and the low-pass
network are normal?[7]
Match network
is normal?[8]
Q7003 works
normally?[9]
Q7002 works
normally?[10]
Q7004 works
normally?[11]
Check the
output circuit of
FGU.
Power level is
normal?
Power level is
normal?
Power level is
normal?
Power level is
normal?
Repair damaged
components.
Repair damaged
components.
Power level is
normal?
Replace Q7003 and
bias resistor.
Replace Q7002 and
bias resistor.
Replace Q7004 and
bias resistor.
Yes