shot

Display for Sony DPS V77
« on: June 27, 2020, 08:18:38 AM »
Hey all,

I got Sony DPS V77 effects unit that has a problem with LCD display. I went to check what's going on and it is obvious that someone tried to pull apart the LCD and left it in a mess. Problem is that this display is on the board that also hosts six momentary switches and some ICs and that's Sony's proprietary part.
Obviously the easiest way to fix it is to replace it with new pcb. I can't find any on ebay/reverb or official Sony spare parts shop. Seems it's unobtainium. If anyone has it let me know I'd buy it!

Is there a way to fix the display? LCD has some sort of sticky tape from it's top going back to the pcb. This tape holds in place few dozens of hairline thick wires (or some sort of conductors) that got displaced when someone tried to lift the tape. Any tricks known how to fix this? I'm afraid to try to lift it anymore since it's so fragile.
When I press on that tape with a finger there's actually some fragments of display coming back to life. But it's impossible to have it stay correct.

What if I find only the display and try to replace it? What would be the procedure when replacing LCD displays? How do you disassemble it and assemble back the new one? Or that's not possible at all?

:)

Luka


radardoug

Re: Display for Sony DPS V77
« Reply #1 on: June 27, 2020, 06:28:36 PM »
I bought a DPS V77 with a bad display thinking that replacing the display would be easy, and then found out it was a Sony custom part. Doh! I ended up finding a much bigger display that showed the image three times, made a custom box, shifted the buttons below the screen on to it. Took a long time. I could probably dig out the notes for it. But not for the faint hearted! I ended up selling it to a guy who loves it!

shot

Re: Display for Sony DPS V77
« Reply #2 on: June 27, 2020, 08:09:29 PM »
Well that might also be the way I should consider.
If you can find your notes on how you did it that would be a great help! Please!

radardoug

Re: Display for Sony DPS V77
« Reply #3 on: June 27, 2020, 08:46:40 PM »
heres a picture of it how it ended up

radardoug

Re: Display for Sony DPS V77
« Reply #4 on: June 27, 2020, 08:47:49 PM »
Heres the display showing the repeats

radardoug

Re: Display for Sony DPS V77
« Reply #5 on: June 27, 2020, 08:48:42 PM »
Heres the schematic for the required changes. Note the pictures were before I put the row of soft buttons on.

squarewave

Re: Display for Sony DPS V77
« Reply #6 on: June 27, 2020, 10:17:12 PM »
Sweet! Nice hack. Well done. Respect.

shot

Re: Display for Sony DPS V77
« Reply #7 on: June 28, 2020, 03:57:16 PM »
Heres the schematic for the required changes. Note the pictures were before I put the row of soft buttons on.

Wow! That's some hacking!
Thanks for the ideas!
:)

radardoug

Re: Display for Sony DPS V77
« Reply #8 on: June 28, 2020, 06:20:14 PM »
I cant remember if I had to change the eprom code slightly. I did disassemble all the code to see how they did the LCD calls. If so, I will have that stuff somewhere.

gyraf

Re: Display for Sony DPS V77
« Reply #9 on: June 29, 2020, 01:56:15 AM »
Darn, this is really cool..!
..note to self: don't let Harman run your company..


 

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