4.1 - 70 MTP700 Portable Radio / Detailed Service Manual TRANSCEIVER 400 MHz
DC Distribution (5.5V_RF) Test
Use this test on a unit with the following symptoms: no 5.5V_RF.
Is the voltage OK?
Check U205 associated
components.
Check 5.5V_RF on C299 for
5.5Vdc.
Check 5.5V_RF on C220 for
5.5Vdc.
Yes
No
No
Yes
Is the voltage OK?
Are the
yOK?
Is the voltage OK?
Re
place U205.
Refer to the DC Distribution
(SWB+) Test flowchart.
Replace defective components.
No
Yes
Yes
Check E212.
No
Check traces to GCAP3 and
Battery Interface Circuitry.
Check U205 pin2 for 7.2Vdc.
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