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TROUBLESHOOTING: RX Analysis Test
RX Analysis Test (Continued)
Continued
from previous
Page
Test
851.0125 MHz
(935.01875 MHz for
900) for -64 dBm at U3004 at
Pin1 or C60060
Pass
Test
851.0125 MHz
(935.01875 MHz for 900)
for -50 dBm at L202
output.
Pass
Continued
on next
page
76
Abbreviations:
US = Unsoldered components or connections
MP = Missing parts
DFP = Defective parts
Fail
Check U3004
US, MP, DFP, etc.
Fail
Measure voltage on
pin 3 of LNA Life.
Is
the voltage
2.775.
Pass
Check on U200,
C60060, C202, L200, C205,
R201, L201, C60056, C206, R200,
L202, C207, C60055 and R204 for
US, MP, DFP, etc.
Pass
Fail
Check on the DC
section, then if not
faulty, replace
Sledgehammer IC
(U2051).
Fail
Replace the part
6880401P26-O
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