Motorola 880 Service Manual page 59

Logic/Processing Supplement 3 - Phone Failure "See Supplier"
- Replace Speech
Coder U500
- 57# Master Clear
If problem still exists, replace the RF / Logic Board.
12/9/97
Display shows phone
failure, see supplier
Apply power to the unit and
enter Test Mode.
Press 7100#
Read the return code.
INFO 00 05
Replace Modem IC
U500
68P09403A50
INFO 00 03
Perform a master cloning.
If problem persists, U705
should be replaced.
Troubleshooting
INFO 00 07
51