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4. TROUBLE SHOOTING
4.9 MIC Trouble
(1608)
R211
100
VA202
R210
2K
C221
39p
10u
C217
VA203
C250
10u
1
2
39p
C222
MIC200
OB4-15L42-C33L
R215
2K
1K
R208
R240
0
C219
39p
SP203
C216
39p
100
R214
SP202
C220
0.1u
VINNORN
VINNORP
Re-soldering R210
Check the soldering
of R210
Replace the
MIC200
No
No
Yes
Re-soldering R207
Yes
START
Check the C217 voltage is
almost 2.2V(DC)
Voltage at pin 23 of
U301 is 2.55V(DC)?
Replace the
U301.
Check the C221
voltage=~1.9V,C222=a few
hundred mV?
Check R211 voltage=~1.4V,
R214 voltage=~1.0V?
No
Yes
No
Yes
Receiver will work properly.
No
Replace the
main board
Figure 4-22.
Figure 4-23.
C217
C250
R211
C222
R214
MIC200
C221
Содержание C3100
Страница 1: ...Service Manual Model C3100 Service Manual C3100 P N MMBD0033001 Date June 2004 Issue 1 0 ...
Страница 51: ...Graph 4 15 EGSM TX 50 VCX VC2 VCX VC2 4 TROUBLE SHOOTING Graph 4 14 DCS TX ...
Страница 67: ...5 DISASSEMBLY INSTRUCTION Figure 5 1 Figure 5 2 66 5 DISASSEMBLY INSTRUCTION ...
Страница 68: ... 67 5 DISASSEMBLY INSTRUCTION Figure 5 3 Figure 5 4 ...
Страница 69: ... 68 Figure 5 5 5 DISASSEMBLY INSTRUCTION ...
Страница 70: ... 69 5 DISASSEMBLY INSTRUCTION Figure 5 6 Figure 5 7 1 3 2 4 1 2 3 ...
Страница 71: ... 70 Figure 5 8 Figure 5 9 5 DISASSEMBLY INSTRUCTION 4 2 3 1 2 1 ...
Страница 72: ... 71 5 DISASSEMBLY INSTRUCTION Figure 5 10 ...
Страница 83: ... 82 7 BLOCK DIAGRAM 7 BLOCK DIAGRAM Power supply ...
Страница 90: ... 89 9 PCB LAYOUT 9 PCB LAYOUT ...
Страница 91: ... 90 9 PCB LAYOUT ...
Страница 98: ... 97 11 3 HW Test Software for Standalone Test Setup 11 STAND ALONE TEST ...
Страница 100: ... 99 Tx Stand alone Test Setting 11 STAND ALONE TEST ...
Страница 102: ... 101 Rx Stand alone Test Setting 11 STAND ALONE TEST ...
Страница 104: ... 103 12 3 Equipment Setup Figure 12 1 Equipment Setup 12 AUTO CALIBRATION ...
Страница 107: ... 106 12 AUTO CALIBRATION ...
Страница 108: ... 107 13 EXPLODED VIEW REPLACEMENT PART LIST 13 EXPLODED VIEW REPLACEMENT PART LIST 13 1 Exploded View ...
Страница 109: ... 108 13 EXPLODED VIEW REPLACEMENT PART LIST ...