Motorola MTP700 Detailed Service Manual page 184

4.2 - 62
DC Distribution (BOT_SWB+) Test
Use this test on a unit with the following symptoms: no BOT_SWB+
MTP700 Portable Radio / Detailed Service Manual
Check R109 for 7.2Vdc
Is the voltage OK?
Yes
Check U111 pin1
for 2.775Vdc
Is the voltage OK?
Yes
Check Q101 pin2
or pin3 for 7.2Vdc
(BOT_SWB+)
Is the voltage OK?
Yes
Check traces to 16-pin
connector.
No
Go to V2_2.775V test.
No
Go to V2_2.775V test.
Check for defective zener
No
VR100.
Check for defective Q101.
TRANSCEIVER 800 MHz