Audio Failure (2) - Nokia NSE–3 SERIES Service Manual

PAMS
Technical Documentation

Audio failure (2)

Digital PCM data at pin 52 of Cobba (N250)
during a call
Analog audio signal (some ten millivolts) at pins 5 and
6 of N250 during a call
Original, 11/97
Disassembly & Troubleshooting Instructions
Downlink (earphone) is broken
YES
YES
DC voltage at pins 5 and 6 of
N250 is 1.4 V during a call
YES
NO
Check
D200 (MAD2)
Check
NO
N250 (Cobba)
Check
NO
N250 (Cobba)
NSE–3
Page 19