User Guide

PAMS Technical Documentation Baseband Trouble shooting
NPE-3
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Earpiece doesn’t work
and there isn’t any
mechanical problem
Check R247, C248, C249
Replace N240 Cobba
Ok
Microphone doesn’t work
and there isn’t any
mechanical problem
C233 towards SRAM (bias) = 2.1V
Check R230, R233,
V231, C234, C236
Check MIC line to Cobba:
L200, C230, C231, C232,
C233, C237, C238, R228, R230
Replace N240 Cobba
Headset earpiece doesn’t work
and there isn’t any
mechanical problem
Check Z201, R210, R213,
R214, C213
Yes
No
Ok
Replace N240 Cobba
Ok
Headset microphone doesn’t work
and there isn’t any
mechanical problem
R220 (bias) = 2.1V
Check
R212, R201, R203,
V202, C202, C203
Check XMIC line to Cobba:
L201, R220, R221, C223,
C224, C225, C226, R226, R227
Replace N240 Cobba
Yes
No
Ok