dead modem?
#13
(05-24-2020, 12:39 AM)admin Wrote: Ah... I thought it was a 85C30 (not a C80).  I had not seen that chip before!  Typically every Mac I have ever worked with uses a separate 53C80 and 85C30 chips.

Yeah, that is going to be tough to get off the board without the proper equipment.  Did you make a new 8 pin serial cable for the loop back test or use the same cable you had?  Maybe your cable is bad?
i didnt make a new 8 pin cable but i did test mine with  multi meter and it seems ok. by proper equipment do you mean a hot air rework station? i dont have one but i have been thinking of getting one. of course then there is the whole not having a spare chip, i have one on a parts board but that board had some major battery leakage so its not a 100% if it would be good.
Reply


Messages In This Thread
dead modem? - by psypher - 05-21-2020, 02:54 AM
RE: dead modem? - by admin - 05-21-2020, 01:13 PM
RE: dead modem? - by psypher - 05-21-2020, 07:02 PM
RE: dead modem? - by admin - 05-21-2020, 08:00 PM
RE: dead modem? - by psypher - 05-21-2020, 11:47 PM
RE: dead modem? - by admin - 05-22-2020, 09:46 AM
RE: dead modem? - by admin - 05-22-2020, 09:55 AM
RE: dead modem? - by psypher - 05-22-2020, 09:58 PM
RE: dead modem? - by psypher - 05-22-2020, 11:02 PM
RE: dead modem? - by admin - 05-23-2020, 05:11 PM
RE: dead modem? - by psypher - 05-23-2020, 08:33 PM
RE: dead modem? - by admin - 05-24-2020, 12:39 AM
RE: dead modem? - by psypher - 05-24-2020, 01:01 AM
RE: dead modem? - by admin - 05-24-2020, 10:51 AM
RE: dead modem? - by psypher - 05-24-2020, 11:46 PM
RE: dead modem? - by admin - 05-25-2020, 11:30 AM
RE: dead modem? - by psypher - 05-27-2020, 05:07 PM
RE: dead modem? - by admin - 05-27-2020, 05:36 PM
RE: dead modem? - by psypher - 06-01-2020, 08:23 PM
RE: dead modem? - by admin - 06-01-2020, 10:18 PM
RE: dead modem? - by psypher - 06-02-2020, 06:52 PM
RE: dead modem? - by psypher - 07-01-2020, 05:46 PM
RE: dead modem? - by admin - 07-02-2020, 12:13 AM
RE: dead modem? - by psypher - 07-02-2020, 06:35 PM
RE: dead modem? - by admin - 07-02-2020, 11:22 PM
RE: dead modem? - by psypher - 07-02-2020, 11:44 PM
RE: dead modem? - by admin - 07-03-2020, 10:56 AM
RE: dead modem? - by psypher - 07-03-2020, 05:46 PM
RE: dead modem? - by psypher - 07-04-2020, 05:14 AM
RE: dead modem? - by admin - 07-04-2020, 11:17 AM



Users browsing this thread: 1 Guest(s)