Well, it does have a bad pot on the display (brightness sticking out the back). I need to fix it or find a suitable replacement. That's not the problem.
Tore down completely, cleaned the PCB in war, soap and water, dried it out. Cleaned the inside of the case. Both look close to new.
Checked every 4116 RAM in the Retro Chip Tester Pro; all good. Checked and socketed each 2114 ram, all good.
#1: I had a semi-burned-up cable from the raw power supply to the PCB. I re-soldered the PCB connections, pulled the burned contact out of the connector cable, cleaned it up with a mini-steel brush pen. Clean the pin on the board. Power is now solid.
#2: Just shows all blocks. I can not find great documentation on which ROM is Which. I finally read somewhere that the character rom is in location UA3. not on my 8032-030 board. It is missing! duh. I was pulling my hair out.
Found out that my TL866II Plus will not program 2716 or 2732 EPROMS that I do have, because it cannot put out enough VPP.
So for now I am stuck waiting for some 27C16s and 27C32 to show up along with a new TL866-3g (which can do 25v VPP).
There are also a bunch of bodge wires on the back all have something to do with cassette port #2. They look factory, but I can't find any information on what that bodge does.
I need to find a good lesson on these pets to better understand them.
Oh #3: I am sure I have to take the keyboard apart and rub its carbon pads on printer paper to bring them back to life.
Dave
Tore down completely, cleaned the PCB in war, soap and water, dried it out. Cleaned the inside of the case. Both look close to new.
Checked every 4116 RAM in the Retro Chip Tester Pro; all good. Checked and socketed each 2114 ram, all good.
#1: I had a semi-burned-up cable from the raw power supply to the PCB. I re-soldered the PCB connections, pulled the burned contact out of the connector cable, cleaned it up with a mini-steel brush pen. Clean the pin on the board. Power is now solid.
#2: Just shows all blocks. I can not find great documentation on which ROM is Which. I finally read somewhere that the character rom is in location UA3. not on my 8032-030 board. It is missing! duh. I was pulling my hair out.
Found out that my TL866II Plus will not program 2716 or 2732 EPROMS that I do have, because it cannot put out enough VPP.
So for now I am stuck waiting for some 27C16s and 27C32 to show up along with a new TL866-3g (which can do 25v VPP).
There are also a bunch of bodge wires on the back all have something to do with cassette port #2. They look factory, but I can't find any information on what that bodge does.
I need to find a good lesson on these pets to better understand them.
Oh #3: I am sure I have to take the keyboard apart and rub its carbon pads on printer paper to bring them back to life.
Dave
