User Guide

PAMS
Technical Documentation
RAE-3
8. Troubleshooting
Page 8 – 65
Issue 1 06/01
2.19 Audio troubleshooting
2.19.1 Both Mic and Earpiece/PHF faulty
MIC and Earpiece /PHF
Check voltage at cap C208
faulty
HOOKDET
HOOKDET
without external audio devices
2,8V?
Check voltage at cap C202
HEADDET
without external audio devices
2,8V?
Check
R206 and R207,
Check frequency at J309
NO
Check
R203, R202, R200
PCMDClk during a call
520kHz
Faulty
N200 (COBBA) *
OK
OK
NO
square wave 2.8Vpp
(ref.fig.53)
Check frequency at J306
PCMSClk during a call
8 kHz
Faulty
N200 (COBBA) *
square wave 2.8Vpp
(ref.fig.54)
NO
NO
OK
C208
C201,
C202
HEADDET
* refer to section 2.17
in this document
Figure 52. PCMDClk