PAMS
Technical Documentation
NSC/W–1/3
Disassembly & Troubleshooting Instructions
Page 18
Original 11/99
Check
D202 (MAD1)
Digital PCM data at pin 50 of Cobba (N250)
during a call
NO
Downlink (speaker) is broken
YES
YES
DC voltage at pins 28 and 29 of
N250 is 1.4 V during a call
NO
Check
N250 (Cobba)
YES
Analog audio signal (some ten millivolts) at pins 28
and 29 of N250 during a call
NO
Check
N250 (Cobba)