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4.9 MIC Trouble
R211
C217
C250
C222
VINNORP
VINNORN
Check the C217 voltage is
voltage=~1.9V,C222=a few
Check R211 voltage=~1.4V,
Receiver will work properly.
Figure 4-22.
C216
C250
C217
10u
39p
(1608)
R211
R240
0
100
R214
100
START
almost 2.2V(DC)
Yes
Check the C221
hundred mV?
Yes
R214 voltage=~1.0V?
R214
C221
10u
C219
39p
No
Voltage at pin 23 of
U301 is 2.55V(DC)?
Yes
Re-soldering R207
No
Check the soldering
of R210
Yes
Re-soldering R210
No
- 59 -
4. TROUBLE SHOOTING
MIC200
Figure 4-23.
MIC200
1
2
OB4-15L42-C33L
No
Replace the
U301.
No
Replace the
MIC200
Replace the
main board
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