Service Manual
35
Description:
[1] Check by making the receiver communicate with a normal transmitter.
[2] Check by placing the main board for the transmitter into a normal terminal.
[3] Please refer to the section “TX Circuit” in this chapter.
[4] The voltage at Pin5 of U7211 is 2.5V.
[5] U7209 is turned on if it is normal.
[6] There will be audio signal before and after the analog switch.
[7] Use a normal MIC to check whether the problem is caused by the MIC.
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