Motorola APX 5000 Service Manual page 123

Troubleshooting Charts: DC Supply Failure
5.4.3 DC Supply 3 Volt Failure
Remove shield SH2B
Check voltage Pin B2 of
U201 Via C208
Voltage 3V
Check for open in the
branch, to the section you
are troubleshooting.
No
Yes
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.
Yes
Replace U201
Yes
Replace 40 Pin
connector
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