Hytera PT580 - Front Case Troubleshooting

Service Manual
RF POWER Circuit
Abnormal
power
supply
Yes
Check whether
3V3D(TP6001) outputs 3.3V
voltage.
No
Check the
baseband.
Yes
Power supply for TX
Power supply for
RX
Check whether
3V_TX is normal. [9]
No
If soldered properly,
replace U6502.
是
Check whether
3V_A is normal. [10]
No
If soldered
properly, replace
U6503.
Yes
Check whether
3V_RX is normal. [1]
No
Power
supply for
FGU
Yes
Completed
Check whether
3V_B is normal. [11]
No
If soldered
properly, replace
U6504.
Yes
Check whether
3V_TXDRV and Q6501 are normal.
[12]
No
If soldered
properly, replace
Q6501.
Yes
If soldered
properly, replace
U6501.
Completed
Check whether U6505 is
normal. [2]
No
If soldered properly,
replace U6505.
Check whether U6506 is
normal. [3]
If soldered properly,
replace U6506.
No
Yes
Yes
Check whether Q6505 is
normal. [4]
If soldered properly,
replace Q6505.
Yes
No
Check whether Q6506 is normal.
[5]
If soldered properly,
replace Q6506.
No
Yes
Check whether Q6503 is
normal. [7]
If soldered properly,
replace Q6503.
No
Yes
Check whether Q6504 is normal.
[8]
If soldered properly,
replace Q6504.
No
Completed
Check whether Q6502 is
normal. [6]
If soldered properly,
replace Q6502.
No
Yes
Yes
Tip: To check output voltage of U6501/U6502/U6503/U6504/Q6501/Q6502/Q6503/Q6504, the 3.3V
voltage (from the 3.3V control signal of the baseband) is needed at the their enable ends.
28