4. TROUBLE SHOOTING
- 83 -
START
Does the audio
profile of the phone
change to the
earphone mode?
NO
YES
Resolder J200
YES
Earphone will work properly
Change earphone
Level at pin1
of U201 is high
NO
Can you hear your
voice from
the earphone?
Set the audio part of the test
Equipment to echo mode
Change the earphone
and try again
NO
Can you hear your
voice from
the earphone?
YES
Can you hear
the sound from
the earphone?
No
Set the audio part of
the test equipment to
PRBS or continuous
wave mode
Download software.
YES
Does it work well?
Change the main board.
YES
NO
Voltage at
C209
=1.2V ?
Check soldering
C209
R210
YES
Change the main board.
YES
Download software
Resolder component
Replace U201
YES
Checking Flow
Содержание C3380
Страница 1: ...Service Manual Model C3380 Date November 2005 Issue 1 0 Service Manual C3380 ...
Страница 3: ... 4 ...
Страница 83: ...4 TROUBLE SHOOTING 84 4 11 KEY backlight Trouble Test Points Figure 4 22 ...
Страница 98: ...4 TROUBLE SHOOTING 99 Yes No Yes No Replace M201 Establish a call Replace U101 Software Re_download ...
Страница 109: ...Note 110 ...
Страница 116: ... 117 8 PCB LAYOUT ...
Страница 117: ... 118 8 PCB LAYOUT ...
Страница 125: ...10 STAND ALONE TEST 126 Figure 10 2 HW test setting Figure 10 3 Ramping profile ...
Страница 129: ... 130 ...
Страница 131: ... 132 ...