Hytera PT580, Service Manual, Page: 32 / 104

Service Manual
Abnormal Power-on
Check whether the power-
on indication is normal. [1]
The terminal cannot
work after power-on.
Yes
No The MMI board
cannot work.
No
Repair the
LCD
connector.
No
Check the
power supply
for the MMI
board.
Yes
No
Repair the
board-to-
board
connector.
Yes
Check whether
3V3D is normal.
Check whether
1V6D is normal.
Yes
Check whether
2V5D is normal.
Check whether
1V8D is normal.
No
No
No
Yes
Yes
The main
board
cannot work.
Check whether
VBAT is normal? [8]
Check the
battery.
No
Check whether
the current is too
small. [10]
Yes
Check whether
the 12M clock works
normally. [12]
Yes
Yes
No
No
Replace U2401 and
check whether the clock works
normally.
No
Yes
Re-program
Check whether
the current is too
large. [10]
No
Re-program
Check whether
the 3V3D ground resistance is
too small. [11]
Yes
Check the
peripheral circuit.
Check whether
the 1V6D ground resistance is
too small. [11]
Yes
Check the
peripheral circuit.
Check whether the
2V5D ground resistance is too
small. [11]
Yes
Check the
peripheral circuit.
Completed
No
No
No
Check whether the
LCD connector is securely
connected. [3]
Check whether the
power supply for the MMI
board is normal. [2]
Check whether the
board-to-board connector
is securely connected. [6]
Yes
Check whether
the 32.768K clock works
normally. [12]
No
Yes
Check
whether the 9.216M
clock works normally.
[12]
No
Yes
Yes
No
Replace the
LCD.
Check whether the
LCD is normal. [4]
Yes
No
Check
U7002.
Yes
Check whether
U7002 works
normally. [5]
No
Yes
Check whether
U6001 works
normally. [9]
No
Yes
Check whether
U6001 works normally.
[9]
Replace
U6001.
No
Yes
Check whether U6001
works normally. [9]
Replace
U6001.
No
Yes
Check the
9.216M clock
circuit.
Check the
32.768K clock
circuit.
Check the 12M
clock circuit.
Replace
U6001.
No
Replace
the parts.
Check whether U7206/
7207/7208 is normal. [7]
Yes
Replace
L6001.
Replace L6003.
Replace L6002.
Replace U2001
and check whether the clock
works normally.
Yes
No
Completed
30