Author Topic: Fax modem teardown  (Read 3115 times)


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Fax modem teardown
« on: September 26, 2013, 04:07:49 PM »
Here is an old Fax modem, removed from service years ago, and now going to the Ewaste pile.

IMG_1308 by SeanB_ZA, on Flickr

Supra 28.8k fax modem, made in Canada.

IMG_1309 by SeanB_ZA, on Flickr

Front panel, the knob broke a while ago.

IMG_1310 by SeanB_ZA, on Flickr

All Rockwell chips inside. PSU at the top, and unlike most this one is happy to run off 9VDC, as it uses a voltage inverter chip ( ICL7660) to make the RS232 voltages.

IMG_1315 by SeanB_ZA, on Flickr

Interesting way to connect to the front panel, use a pin header and solder it to the board.

IMG_1318 by SeanB_ZA, on Flickr

Nice LED displays.

IMG_1320 by SeanB_ZA, on Flickr

Has some bad chips inside, has been getting worse for years, started with only one bad dot now is in both displays.

IMG_1323 by SeanB_ZA, on Flickr

Display self test on power up shows the dead digits, along with my shoe.


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Re: Fax modem teardown
« Reply #1 on: October 01, 2013, 12:41:46 PM »
I like the look of those LED displays :)


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Re: Fax modem teardown
« Reply #2 on: November 04, 2013, 07:30:35 PM »
Awesome! I had one of those back in the day!
Eric Haney
Systems Programmer, EE, MCSE, DMC
SilverCore Labs


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Re: Fax modem teardown
« Reply #3 on: November 11, 2013, 11:59:30 AM »
What a blast from the past! I used to run my BBS off a Zoom 14400 modem...back in the day....
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