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4 . TROUBLE SHOOTING
Checking Flow
START
Insert Earmic to earjack
Level of
RADIO_DETECT
Is high?
Resolder R421
Set the audio part of the test
Equipment to echo mode
Earphone will work
properly
Can you hear your
voice from the
earphone?
Level 1,2,8,9 pin
Of U700 is
OK?
Check
U205 works
properly
Level
2,8,1,9 pin of U701
is OK?
Change U205
Change U701
Check
Soldering of
L202 & C219
Resolder
L202 & C219
Change main board
Check
Soldering Component
Around U701
OK?
Resolder
the component
Change U700
Check
Soldering Component
Around U700
OK?
Resolder
the component
GO to 4.10 Earphone Trouble
YES
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
NO
Содержание B2050
Страница 7: ... 6 2 PERFORMANCE 2 PERFORMANCE 2 1 H W Features ...
Страница 8: ... 7 2 PERFORMANCE ...
Страница 9: ... 8 2 PERFORMANCE 2 2 Technical Specification ...
Страница 10: ... 9 2 PERFORMANCE ...
Страница 11: ... 10 2 PERFORMANCE ...
Страница 12: ... 11 2 PERFORMANCE ...
Страница 13: ... 12 2 PERFORMANCE ...
Страница 53: ... 52 4 2 TX Trouble TEST POINT 13Mhz OSCILLATOR Mobile SW FEM TRANCEIVER LDO PAM 4 TROUBLE SHOOTING ...
Страница 57: ... 56 3 Checking Ant SW Mobile SW 4 TROUBLE SHOOTING ...
Страница 67: ... 66 TEST POINT 4 6 LCD Trouble 4 TROUBLE SHOOTING ...
Страница 70: ... 69 4 TROUBLE SHOOTING TEST POINT 4 7 Speaker Trouble ...
Страница 77: ... 76 4 TROUBLE SHOOTING 4 10 KEY backlight Trouble TEST POINT ...
Страница 91: ... 90 5 DOWNLOAD AND CALIBRATION 6 Press Start and Pover on the phone using JIG remote Power on Switch 1 ...
Страница 92: ...5 DOWNLOAD AND CALIBRATION 91 5 2 Calibration ...
Страница 93: ... 92 5 DOWNLOAD AND CALIBRATION ...
Страница 97: ......
Страница 103: ... 102 Figure 8 1 B2050 BOTTOM SIDE PCB LAYOUT 8 PCB LAYOUT ...
Страница 104: ... 103 8 PCB LAYOUT Figure 8 1 B2050 TOP SIDE PCB LAYOUT ...
Страница 105: ......
Страница 113: ...10 STAND ALONE TEST 112 ...
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Страница 133: ... 132 ...