Hytera PD415 - 6 Troubleshooting Flow Chart; Control Circuit

UHF1 (400
‐
470 MHz)
Troubleshooting Flow Chart
17
6. Troubleshooting Flow Chart
6.1 Control Circuit
Check the control circuit
LED is normal?
Replace LED
Check U307
Yes
No
Yes
No
Yes
No
No
Yes
No
The control circuit
is normal.
Yes
No
Completed
Yes
3V3D1 is normal?
Yes
No
Power-on indication is
normal?[1]
The RF circuit is driven
normally?[2]
Verify RF power supply
circuit (including U302,
U303, U306 and U310)
and control circuit.
1V2D is normal?
Check U311
There is a high
level at the CE
pin of U307?
Check U304
3V3A is normal?
Check reset signal of
U103 (12 MHz)
D
escriptions of normal situation:
[1
] A
fter the radio is powered on, the LED indicator and alert tone work properly.
[2]
T
he RF power supply outputs normally. U302 and U303 output 5 V voltages while U306 and U
310
out
put 3.3 V voltages.