User Guide

PAMS
Technical Documentation
RAE-3
8. Troubleshooting
Page 8 – 68
Issue 1 06/01
2.19.3 Earpiece faulty
Earpiece
Check assembly of
faulty
Connection
Check digital PCM data
at J307 (PCMTxData)
Data
NO
OK
OK
NO
Voltages OK?
Check analog audio signal at
Signal a few mV ?
NO
NO
OK
OK?
during a call
OK?
DC voltage at C228, C229
1.4V during call ?
C228, C229 during a call
earpiece and gasket
Check connections from
audio PWB to C229 and C228
Faulty
D300 (MAD) 2)
Faulty
N200 (COBBA)
OK?
1)
Check R215, R216 and
connections.
Check
C228, C229
Check Flex UL8 and
B–to–B conn X400
pins 47, 48
Figure 56.
Note:
1) If sound is distorted or too quiet fault is most probably in the gasket or in the
earpiece diaphragm.
2) Refer to section 2.16 in this document.