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(Mystery plugin sighting) |
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{{TM500 | mfg= | type= | {{TM500 | mfg=(Unknown mfg) | type=Liquid Crystal Driver | function=liquid crystal driver | class=special function | image=Tm500 liquid crystal driver front crop.jpg | introduced=(?) | discontinued=(?) | designers= |manuals= | ||
}} | }} | ||
The unit appears to have two channels. The main board is very good quality. | |||
There are two "proto" type boards in the unit. One is for fuses. The other has a pair of [[74121]] ICs on it. | |||
Glenn Little, who owns one of these plug-ins says: | |||
<blockquote> | |||
When I got it the edge card connector was damaged, thankfully in a place where there are no used pins. | |||
There was one power transistor missing and I can replace it with one like in the other channel. | |||
There is also a ground binding post missing, this is easily replaced. | |||
The pictures are of the unit as I received it. | |||
</blockquote> | |||
The plug-in has controls for PW UPPER and PW LOWER for both channels. | |||
There is also a DELAY and AMPLITUDE control for each channel. | |||
There is a BNC for the top channel only INPUT. | |||
There is a BNC for SYNC. The SYNC appears to go to both channels. | |||
There is a label on the front REL 11, so, maybe there are others out there. | |||
The front binding posts are UPPER OUTPUT, LOWER OUTPUT and GROUND for each channel. | |||
The active backplane pins are 2A, 3A, 6A, 7A, 8A, 9A, 10A, 12A, and 7B. 8B, 11B and 8A are connected. | |||
12A and 12B are connected together. | |||
All of these pins are power related, so the only inputs and outputs are via the front panel. | |||
There is a keyway between pins 6 and 7. | |||
There are "flying" jumpers between some IC pins with some of these pins lifted from the sockets. Probably still a work in progress. | |||
The front panel is thin aluminum with, what looks like, photo etching for the labeling and shading. | |||
Harmonica connectors are used to connect to the board. | |||
The construction looks good, but not of Tektronix quality. | |||
==See Also== | |||
* [[TM500 Series plug-in interface]] | |||
==Pictures== | ==Pictures== | ||
<gallery> | <gallery> | ||
Liquid_crystal_driver_top_view.JPG | Top | |||
Liquid_crystal_driver_back.jpg | Liquid_crystal_driver_front_view.jpg | Front | ||
Liquid_crystal_driver_bottom_view.JPG | Bottom | |||
Liquid_crystal_driver_back.jpg |Back | |||
Liquid_crystal_driver_flying_jumpers.JPG | Flying Jumpers | |||
Liquid_crystal_driver_back_of_front.JPG | Back of Front showing construction | |||
Liquid_crystal_driver_missing_transistor_and_fuses.JPG | Missing transistor and fuses | |||
Liquid_crystal_driver_board_part_number.JPG | Board part number | |||
</gallery> | </gallery> |