Dc Supply Fail Troubleshooting Chart (2 Of 3) - Motorola XTS 2500 Service Manual

UHF1 Troubleshooting Charts: DC Supply Fail Troubleshooting Chart (2 of 3)

6.2.8 DC Supply Fail Troubleshooting Chart (2 of 3)

3
Check voltage VCC5 at
L705
Voltage
=5V
+/- 5%
Yes
Check voltage at C517
Voltage
=3.0V
+/-5%
Yes
Check voltage RFSW_B+
at C730
Voltage
=7.5V
Yes
4
6816985H01-F
No
Replace U701
No
Check U502 and D513,
replace it if necessary
No
Replace Q703
Restart from Chart 6.7
No
Yes
Problems
solve?
6.2-7
End
February 14, 2012