Dc Supply 3 Volt Failure - Motorola APX 7000 Detailed Service Manual

5-16
5.4.2

DC Supply 3 Volt Failure

Remove shield SH14
Check voltage Pin B2 of
U201 Via C208
Voltage 3V
Yes
Check for open in the
branch, to the section you
are troubleshooting.
No
Check Voltage Pin A2 of
U201 Via C207
Voltage 3.6V
No
Check 40 Pin connector
P101 to J1001 Pin 37 for
an open
Open found?
No
Refer to Vocon
troubleshooting guide for
the 3.6V SW1 supply.
Troubleshooting Charts: DC Supply Failure
Yes
Replace U201
Yes
Replace 40 Pin
connector