Motorola MTP700 - Page 108

4.1 - 74 MTP700 Portable Radio / Detailed Service Manual TRANSCEIVER 400 MHz
DC Distribution (VREF1_2.775V) Test
Use this test on a unit with the following symptoms: no VREF1_2.775V.
Is the voltage OK?
Check C285 for 2.775Vdc.
Check C252 for 3.3Vdc.
Yes
No
No
Yes
Is the voltage OK?
Check traces to U307.
Change GCAP3 (U200).
Go to V3_2.775V test.