User Guide

PAMS
Technical Documentation
NSE–8/9
Troubleshooting
Page 20
Issue 1 07/99
4.7. Audio fault.
Upon disassembly it is wise to check the spring contacts of the audio transducers and bottom connector
Uplink and downlink are
broken
Voltage on V202 pin 4
(HOOKDET) is 2.8V without
external audio devices
Check R226, R225,
R212, V202
Voltage on R200
(HEADDET) is 0,65V
without external audio
devices
No
Yes
Check V200, R200,
R202
Frequency at E200 on
(N200 PCMSclk) is 8kHz
square wave logical
level during call
No
Yes
Check N200
Check for uplink and for
downlink broken
No
Yes
Figure 4–15