Motorola MTP700 - Page 109

TRANSCEIVER 400 MHz MTP700 Portable Radio / Detailed Service Manual 4.1 - 75
DC Distribution (VREF2_2.775V) Test
Use this test on a unit with the following symptoms: no VREF2_2.775V
Yes
No
No
Yes
Is the voltage OK?
Is the voltage OK?
No
Yes
Check C263 for 2.775Vdc
(VREF2_2.775V).
Check C120 for 2.775Vdc
(Backlight+).
Check traces to D001.
Is the voltage OK?
YesNo
Replace E209.
Replace E104.
Change GCAP3 (U200).
Is the voltage OK?
Check C252 for 3.3Vdc.
Go to V3_2.775V test.
Check C212 for 2.775Vdc
(VREF2_2.775V_DIG).