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
(Ba).
Check traces to D001.
Is the voltage OK?
Yes
No
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).
Содержание IMPRES Tetra MTP700
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