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DS 110 Service menu
Boot process:
The normal boot is to press boot key which is that the PWRKEY is being dragged down.
Once the boot key is pressed, all LDO are open except VSIM. After VCORE
opening RESET timer and timer out, RESET is being pitched up to start the digital
baseband chip, that is, UMT6223D starts to run and roll polling its ROWX pin, pitch up its
PWRONIN pin, then you can release the boot key. This is the initial boot process.
3.4 Audio Frequency
The sound quality performs more pleasant on account of audio processing integrated in
UMT6223D
3.4.1 Speaker loop
3.4.2 MIC loop
Check basic bias voltage signal of MICBIASP and MICBIASN and the language signal of
MIC itself when the MIC is good but no response of LOOP MIC in test.
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Содержание DS 110
Страница 4: ...DS 110 Service menu 1 2 Distribution of the mainboard components 2...
Страница 8: ...DS 110 Service menu DCS transmit signal PA EN waveforms of PA in transmit state PA EN 6...
Страница 9: ...DS 110 Service menu PA BAND SW waveforms PA BAND SW GSM PA BAND SW DCS 7...
Страница 10: ...DS 110 Service menu PA Vramp waveforms Vramp pcl5 Vramp pcl 19 8...
Страница 14: ...DS 110 Service menu 3W SDATA 3W SCLK 12...
Страница 16: ...DS 110 Service menu VAFC TCXO output 26MHZ 14...
Страница 21: ...DS 110 Service menu 3 5 3The signal waveform Chip select signals CS Screen reset signal LRST 19...