HOME | DD

Description
...or an AWA C2201(Z)/Thorn 9033 mains/12V/24V TV (made by Mitsubishi)

This TV set has some resembelence to a Commodore PET computer.
I have modified this set to have a VHF/UHF TV tuner (it originally had a VHF-only tuner), an AV input and since it had enough room inside after replacing the VHF-only tuner, digital TV reception too!
The AC/DC input was modified so a figure-8 plug can only fit in the mains section (it originally could fit in the DC section with disasterous (and possibly tragic) results), with the DC input being a standard 2.1mm DC socket.

To make this modification possible, the following parts were required:

* A VHF/UHF tuner from an old VCR which had the same (or close to) the Vision IF (VIF) of the TV set.
* A set-top box board from a lot of two Omni DVB-101 set-top boxes (third generation units; only one had an enclosure and remote; the other was boards only)
* A regulated power supply which can output +3.3V, +5V, and +12V (pulled out of an old laptop) - the tuning +30V was obtained from the Tuning Voltage zener diode.
* Two switches: one for switching between the AV input and TV; the other for digital and analog TV selection.
* Two relays; one for switching between analog and digital TV; the other for switching the digital set-top box board off when the analog TV tuner is selected to avoid interference.
* a low-noise TV amplifier (which had SMD components), since the VCR tuner had lower performance than the original VHF-only tuner.
* a high-power rectifier from an old computer power supply (so DC can only enter the TV, not leave it).
* and finally, an infrared remote sensor, since it was easier to implement than having buttons for Channel and Volume +/-, Power and Menu.

I have successfully modified a Digitor G1602 DVD remote to operate all of the commands used on the Omni remote (both had the same protocol and Device Code, and a majority of the codes were the same on both remotes) - I have made a database of remote control codes from remotes I have handled.
Originally, I had to forgo the Yellow/Subtitle function, but making a matrix diagram of the remote control chip revealed hidden functions and fortunately, this function was made available on a "blind" key (after some fine trace cutting and soldering), which originally had a command which was not on the Omni remote.
The "blind" keys were added by cutting out holes in the graphics overlay covering the holes in the grey plastic (with the graphics overlay face down) and adding rubber keys from a broken DVD remote.
Some of the keys did not correspond to the function on the set-top box board; so labels from a Dymo thermal printer were added to the remote (and the TV too!).

I once considered adding a hard disk recorder, but that was too ambitious, required fine soldering skills and that there was not enough room to fit the hard disk.

Back to the database of remote control codes...
When I was looking for a factory reset code for a UEI remote, I discovered that you can connect certain UEI remote models to your computer and program the remote with your computer, and extract any learned codes from the remote.
This accidental discovery has leaded me to rebuilding a remote for a Kross TS-2818 DVD player/digital set-top box combo, not to mention converting a Digitor G1602 remote to work with an Omni DVB-101 set-top box.

The only problems I have (with the set-top box board, of which I can find no firmware updates for it, especially if a RS232-TTL converter is required) is that the set-top box board does not support logical channel numbering (LCN), and that GO (WIN/Channel 9) is squashed (wrong aspect ratio), even though the correct aspect ratio is selected in the setup menu.

I also have plans to add a set-top box board in another set which can run on 12V (or 24V) as well.

This shows the genius within...

Description
...or an AWA C2201(Z)/Thorn 9033 mains/12V/24V TV (made by Mitsubishi)

This TV set has some resembelence to a Commodore PET computer.
I have modified this set to have a VHF/UHF TV tuner (it originally had a VHF-only tuner), an AV input and since it had enough room inside after replacing the VHF-only tuner, digital TV reception too!
The AC/DC input was modified so a figure-8 plug can only fit in the mains section (it originally could fit in the DC section with disasterous (and possibly tragic) results), with the DC input being a standard 2.1mm DC socket.

To make this modification possible, the following parts were required:

* A VHF/UHF tuner from an old VCR which had the same (or close to) the Vision IF (VIF) of the TV set.
* A set-top box board from a lot of two Omni DVB-101 set-top boxes (third generation units; only one had an enclosure and remote; the other was boards only)
* A regulated power supply which can output +3.3V, +5V, and +12V (pulled out of an old laptop) - the tuning +30V was obtained from the Tuning Voltage zener diode.
* Two switches: one for switching between the AV input and TV; the other for digital and analog TV selection.
* Two relays; one for switching between analog and digital TV; the other for switching the digital set-top box board off when the analog TV tuner is selected to avoid interference.
* a low-noise TV amplifier (which had SMD components), since the VCR tuner had lower performance than the original VHF-only tuner.
* a high-power rectifier from an old computer power supply (so DC can only enter the TV, not leave it).
* and finally, an infrared remote sensor, since it was easier to implement than having buttons for Channel and Volume +/-, Power and Menu.

I have successfully modified a Digitor G1602 DVD remote to operate all of the commands used on the Omni remote (both had the same protocol and Device Code, and a majority of the codes were the same on both remotes) - I have made a database of remote control codes from remotes I have handled.
Originally, I had to forgo the Yellow/Subtitle function, but making a matrix diagram of the remote control chip revealed hidden functions and fortunately, this function was made available on a "blind" key (after some fine trace cutting and soldering), which originally had a command which was not on the Omni remote.
The "blind" keys were added by cutting out holes in the graphics overlay covering the holes in the grey plastic (with the graphics overlay face down) and adding rubber keys from a broken DVD remote.
Some of the keys did not correspond to the function on the set-top box board; so labels from a Dymo thermal printer were added to the remote (and the TV too!).

I once considered adding a hard disk recorder, but that was too ambitious, required fine soldering skills and that there was not enough room to fit the hard disk.

Back to the database of remote control codes...
When I was looking for a factory reset code for a UEI remote, I discovered that you can connect certain UEI remote models to your computer and program the remote with your computer, and extract any learned codes from the remote.
This accidental discovery has leaded me to rebuilding a remote for a Kross TS-2818 DVD player/digital set-top box combo, not to mention converting a Digitor G1602 remote to work with an Omni DVB-101 set-top box.

The only problems I have (with the set-top box board, of which I can find no firmware updates for it, especially if a RS232-TTL converter is required) is that the set-top box board does not support logical channel numbering (LCN), and that GO (WIN/Channel 9) is squashed (wrong aspect ratio), even though the correct aspect ratio is selected in the setup menu.

I also have plans to add a set-top box board in another set which can run on 12V (or 24V) as well.

This shows the genius within...