Motorola MTP700 - Page 184

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