4. TROUBLE SHOOTING
- 76 -
CHECKING FLOW
START
Does the audio
profile of the phone
change to the
earphone mode?
Check the voltage Level
CN301.8 = Low?
Replace U100 or Change Board
Re-solder CN301 or Change
another Ear- Mic set and Try again
Mic
Earphone
Go to MIC
Trouble section
Re-solder causal
component
(CN301)
Check the signal Level
at AUX_MIC.
Is it about 1.2~1.5V DC
with a few tens mV AC?
Change another Ear-Mic set and Try again
Acoustic
Does waveform at
U102.EPPA1
fluctuate?
Replace U100 or
Change the board
Does waveform at
CN301.4 and CN301.5
fluctuate?
Re-solder causal
component
(CN302,C322 etc.)
Change another Ear-Mic set and Try again
Yes
Yes
Yes
Yes
No
No
No
No
No
Содержание KG270
Страница 1: ...Date April 2007 Issue 1 0 Service Manual Model KG270 MG160 Service Manual KG270 MG160 ...
Страница 3: ... 4 ...
Страница 81: ...5 DOWNLOAD 82 5 DOWNLOAD 5 1 Download Setup Configure system like figure 5 1 Figure 9 1 Download Setup ...
Страница 87: ... 88 6 BLOCK DIAGRAM 6 BLOCK DIAGRAM ...
Страница 92: ... 93 8 PCB LAYOUT ...
Страница 93: ... 94 8 PCB LAYOUT ...
Страница 104: ... 105 10 CALIBRATION 10 2 3 Click SETTING Memu 10 2 4 Setup Ezlooks menu such as the following fugure KG278 ...
Страница 106: ...10 CALIBRATION 107 10 2 7 Select MODEL 10 2 8 Click START for RF calibration 10 2 9 RF Calibration finish KG278 ...
Страница 107: ...10 CALIBRATION 108 10 2 10 Calibration data will be saved to the following folder ...
Страница 113: ... 114 ...
Страница 124: ...Note ...
Страница 125: ...Note ...