FLY E185
Service Manual
CKT Confidential
Page 36 of 47
4.5 No voice in Speaker
First you can check whether the audio source can output from baseband chip with a headset. Then
check speaker resistance to confirm whether the resistance of Speaker is 8ohm. If not, it means the
speaker is broken. Otherwise you need to check the Audio PA circuit to find out the problem. After
repaired, you can test it on engineering mode again. By the way, E185 speaker is solder on the
main-board.
4.6 T-Flash card failure
T-Flash card circuit is very simple, so you must pay more attention to the card socket to check
whether it is soldered well.
4.7 Can not download software
There are many reasons that can lead to download failure. First of all, you must make sure that the
download procedure is correct. You can follow the instruction in the chapter below. There are
many kinds of phenomenon when the problem occurs:
9
PC can’t recognize the phone
Change for another download cable and try again. Otherwise, you need to check whether the
PINs of the system interface are broken. If everything is ok, please re-solder or replace the
corresponding I/O connector and baseband CPU.
9
Download tool hangs when downloading
You need to check the corresponding FLASH chip, baseband chip and trace between
baseband CPU and FLASH.
