TM500 Liquid Crystal Driver: Difference between revisions

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{{TM500 | mfg=(Unknown mfg) | type=Liquid Crystal Driver | function= | class=special function | image=liquid_crystal_driver_front.jpg | introduced=(?) | discontinued=(?) | manuals=
{{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=
}}
}}  
Mentioned in Dennis Tillman's [[List of TM500 and TM5000 equipment]]. An example turned up on eBay in October 2019 in a lot with two 5000-series oscilloscope vertical amp plugins. Only low res photos provided. Listed as TM500 plugin but compatibility unknown.
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.


This appears to fit a TM-500 series frame.
Glenn Little, who owns one of these plug-ins says:
The unit appears to have two channels.
<blockquote>
The main board is very good quality.
When I got it the edge card connector was damaged, thankfully in a place where there are no used pins.
There are two "proto" type boards in the unit. One is for fuses. The other has a pair of 74121 ics on it.
There was one power transistor missing and I can replace it with one like in the other channel.  
When I got it the edge card connector was damaged, thankfully in a place where there are no used pins.  
There is also a ground binding post missing, this is easily replaced.
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.
The pictures are of the unit as I received it.  
</blockquote>
This has controls for PW UPPER and PW LOWER for both channels.  
There is also a DELAY and AMPLITUDE control for each channel.  
The plug-in has controls for PW UPPER and PW LOWER for both channels.
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 also a DELAY and AMPLITUDE control for each channel.
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.  
There is a BNC for the top channel only INPUT.
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.  
There is a BNC for SYNC. The SYNC appears to go to both channels.
The front panel is thin aluminum with, what looks like, photo etching for the labeling and shading.  
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.  
Harmonica connectors are used to connect to the board.  


The construction looks good, but not of Tektronix quality.
The construction looks good, but not of Tektronix quality.
==See Also==
* [[TM500 Series plug-in interface]]


==Pictures==
==Pictures==
<gallery>
<gallery>
Liquid_crystal_driver_front.jpg |ebay picture
Liquid_crystal_driver_back.jpg |ebay picture
Liquid_crystal_driver_top_view.JPG | Top  
Liquid_crystal_driver_top_view.JPG | Top  
Liquid_crystal_driver_front_view.jpg | Front
Liquid_crystal_driver_front_view.jpg | Front
Liquid_crystal_driver_bottom_view.JPG | Bottom
Liquid_crystal_driver_bottom_view.JPG | Bottom
Liquid_crystal_driver_back.jpg |Back
Liquid_crystal_driver_flying_jumpers.JPG | Flying Jumpers
Liquid_crystal_driver_flying_jumpers.JPG | Flying Jumpers
Liquid_crystal_driver_back_of_front.JPG | Back of Front showing construction
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_missing_transistor_and_fuses.JPG | Missing transistor and fuses
Liquid_crystal_driver_board_part_number.JPG | Board part number
Liquid_crystal_driver_board_part_number.JPG | Board part number
Tek liquid crystal driver 2.jpg
</gallery>
</gallery>

Latest revision as of 17:14, 8 June 2024

(Unknown mfg) Liquid Crystal Driver
liquid crystal driver
(Unknown mfg) Liquid Crystal Driver

Produced from (?) to (?)

Manuals
(All manuals in PDF format unless noted otherwise)
Manuals – Specifications – Links – Pictures

The (Unknown mfg) Liquid Crystal Driver is a liquid crystal driver plug-in for the TM500 system.

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:

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.

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

Pictures

  • Top

    Top

  • Front

    Front

  • Bottom

    Bottom

  • Back

    Back

  • Flying Jumpers

    Flying Jumpers

  • Back of Front showing construction

    Back of Front showing construction

  • Missing transistor and fuses

    Missing transistor and fuses

  • Board part number

    Board part number

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