Rf Power Circuit - Hytera PT580 Service Manual

RF POWER Circuit

Power supply for
No
If soldered
Check whether
properly, replace
3V_RX is normal. [1]
U6501.
Completed
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.
RX
If soldered properly,
replace U6505.
Yes
If soldered properly,
replace U6506.
If soldered properly,
replace Q6505.
If soldered properly,
replace Q6506.
If soldered properly,
replace Q6502.
If soldered properly,
replace Q6503.
If soldered properly,
replace Q6504.
Abnormal
power
supply
Yes
Check whether
3V3D(TP6001) outputs 3.3V
voltage.
Yes
Power
supply for
FGU
No
Check whether U6505 is
normal. [2]
Yes
No
Check whether U6506 is
normal. [3]
Yes
No
Check whether Q6505 is
normal. [4]
Yes
No
Check whether Q6506 is normal.
[5]
Yes
No
Check whether Q6502 is
normal. [6]
Yes
No
Check whether Q6503 is
normal. [7]
Yes
No
Check whether Q6504 is normal.
[8]
Yes
Completed
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Service Manual
No
Check the
baseband.
Power supply for TX
No
Check whether
3V_TX is normal. [9]
No
Check whether
3V_A is normal. [10]
是
Yes
No
Check whether
3V_B is normal. [11]
Yes
Check whether
3V_TXDRV and Q6501 are normal.
[12]
Yes
Completed
If soldered properly,
replace U6502.
If soldered
properly, replace
U6503.
If soldered
properly, replace
U6504.
No
If soldered
properly, replace
Q6501.