4. TROUBLE SHOOTING
- 77 -
SETTING : After initialize Agilent 8960, Test EGSM, DCS mode
Graph 4-11
Checking Flow
START
Voltage across C141
= 2.5VDC?
No
MIC Bias Voltage
Yes
Check the signal level
at each side of MIC101.
Is it a few tens mVAC?
No
Replace the microphone, MIC101.
Check the soldering of
R127,R130, R132,
Yes
No
Resolder R127,R130, R132.
MIC WILL WORK.
Replace Main board.
Yes
Replace U102.
Voltage VMIC of U102
= 2.5VDC?
No
Yes
Resolder R123 & R125.
Waveform
MIC+
MIC-
Summary of Contents for C1150
Page 1: ...Service Manual Model C1150 Service Manual C1150 Date October 2005 Issue 1 0 ...
Page 3: ......
Page 99: ...Note 100 ...
Page 104: ... 105 8 PCB LAYOUT 8 PCB LAYOUT ...
Page 105: ... 106 8 PCB LAYOUT ...
Page 113: ...10 STAND ALONE TEST 114 Figure 10 2 HW test setting Figure 10 3 Ramping profile ...
Page 117: ...Note 118 ...
Page 119: ... 120 Note ...
Page 135: ...Note 136 ...