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4.13 Ear Jack Trouble
START
Inset the earphone
to the phone
Set the audio part of the test
equipment to echo mode.
Earphone will work
properly
Voltage at
C224=~1.6V
Voltage at pin4
of U203=~1V
Check soldering
of R226,C228
Replace
main board
Re-soldering
R226,C228
Re-soldering
R219
Re-soldering
U301
Replace
main board
voltage at pin1 of
U204 =2.8V?
Check the
soldering U204
Check the
soldering J200
Replace
U204
Re-soldering
U204
Re-soldering
U204
Download
S/W
Change the earphone
and try again
Can you hear your voice
from the earphone?
Set the audio part of test
equipment to PRBS or
continuous wave mode
Can you hear your voice
from the earphone?
voltage at
C227=~1.2V
Check soldering
C227,R224,J200
Download
S/W
Re-solder
C227,R224,J200
Can you
hear your voice from the
earphone?
Does the audio profile of
thephone change to the
earphone mode?
Yes
No
No
Yes
No
No
No
Yes
Yes
Yes
Yes
Yes
No
Yes
No
Yes
No
Not good
Yes
Yes
No
Yes
No
Yes
No
4. TROUBLE SHOOTING
SETTING : After Initialize Agilent 8960, Test in EGSM, DCS Mode.
Summary of Contents for C3100
Page 1: ...Service Manual Model C3100 Service Manual C3100 P N MMBD0033001 Date June 2004 Issue 1 0 ...
Page 51: ...Graph 4 15 EGSM TX 50 VCX VC2 VCX VC2 4 TROUBLE SHOOTING Graph 4 14 DCS TX ...
Page 67: ...5 DISASSEMBLY INSTRUCTION Figure 5 1 Figure 5 2 66 5 DISASSEMBLY INSTRUCTION ...
Page 68: ... 67 5 DISASSEMBLY INSTRUCTION Figure 5 3 Figure 5 4 ...
Page 69: ... 68 Figure 5 5 5 DISASSEMBLY INSTRUCTION ...
Page 70: ... 69 5 DISASSEMBLY INSTRUCTION Figure 5 6 Figure 5 7 1 3 2 4 1 2 3 ...
Page 71: ... 70 Figure 5 8 Figure 5 9 5 DISASSEMBLY INSTRUCTION 4 2 3 1 2 1 ...
Page 72: ... 71 5 DISASSEMBLY INSTRUCTION Figure 5 10 ...
Page 83: ... 82 7 BLOCK DIAGRAM 7 BLOCK DIAGRAM Power supply ...
Page 90: ... 89 9 PCB LAYOUT 9 PCB LAYOUT ...
Page 91: ... 90 9 PCB LAYOUT ...
Page 98: ... 97 11 3 HW Test Software for Standalone Test Setup 11 STAND ALONE TEST ...
Page 100: ... 99 Tx Stand alone Test Setting 11 STAND ALONE TEST ...
Page 102: ... 101 Rx Stand alone Test Setting 11 STAND ALONE TEST ...
Page 104: ... 103 12 3 Equipment Setup Figure 12 1 Equipment Setup 12 AUTO CALIBRATION ...
Page 107: ... 106 12 AUTO CALIBRATION ...
Page 109: ... 108 13 EXPLODED VIEW REPLACEMENT PART LIST ...