- 75 -
4 . TROUBLE SHOOTING
Checking Flow
START
Resolder J200
Does the audio
profile of the phone
change to the
earphone mode?
Set the audio part
of the test Equipment
to echo mode
Change the earphone
and try again
Set the audio part of
the test equipment to
PRBS or continuous
wave mode
Can you hear
the sound from
the earphone?
Voltage level check
Of HEADSET_MIC_P
signal.
Check
U200 & U205
works properly
Voltage level check
Of HEADSET_SPK_OUT_P
& HEADSET_SPK_OUT_N
signal
Resolder components
Resoler U200 & U205
Change main board
Can you hear
your voice from
the earphone?
Can you hear
your voice from
the earphone?
Earphone will work properly
Level at
JACK_DETECT signal
is low
Resolder R123, R216
or Replace J200
YES
YES
YES
YES
YES
YES
YES
YES
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 ...
Страница 117: ......
Страница 119: ......
Страница 132: ... 131 ...
Страница 133: ... 132 ...