New Screen Replacement Option

Yamaha SY77 is a 16 voice multitimbral music workstation first produced by Yamaha Corporation in 1989. The SY77 is a synthesizer whose architecture combines AFM (Advanced Frequency Modulation) synthesis, AWM2 (Advanced Wave Memory 2) for ROM-borne sample-based synthesis, and the combination of these two methods christened Realtime Convolution and Modulation Synthesis (RCM).

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Re: New Screen Replacement Option

Unread post by Derek » Mon May 11, 2015 8:22 pm

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Re: New Screen Replacement Option

Unread post by Foret » Sat Jun 20, 2015 5:22 pm

Today completed the replacement of old defective displays a new one. Other events will exchange FDD drive emulation for USB FDD 720 kB . I have photos in an album on Facebook - here : https://www.facebook.com/rosta.foret/me ... 039&type=3 .
I have ordered initially display the blue and white , however contractor sent me this , I 'll leave it there . However, I have a question . I feel that I display excessively hot . Anyone have any experience or idea? Or not thinking ? Thanks for any response .
Live play the Yamaha SY77, Yamaha MX61, Kurzweil Artis SE, micro AKG, monitor their own production - mix with 4 keys stereo , keyboard stand of its own production , sometimes back vocal ,
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Re: New Screen Replacement Option

Unread post by Miks » Sat Jun 20, 2015 5:42 pm

I feel that I display excessively hot
Perhaps feeding the LED backlight with the wrong voltage (i.e. 5 volts instead of 3.xx volts)? This may be the reason for heating up the display... 8O

Please immediately check the specs of the type of display YOU used with your synth. If waiting too long the LEDs may burn out and the display may get damaged as well 8O

Can you tell us exactly what type of display you've ordered?
My (key related) gear (in alphabetical order):
Ferrofish: B4000+
Kawai: K1 II
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Roland: D-50, D-110, D-550, PG-1000
Yamaha: AW1600, DX7IID (w/ 'Cool Blue'), EX5R, RM50, RX5, SY99 (w/ 'Cool Blue'), TG500,
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Re: New Screen Replacement Option

Unread post by Foret » Sun Jun 21, 2015 11:11 am

Contractor accidentally sent me another , I ordered a blue and white . I will not change it , I have written to you to excel spreadsheet file for the pinout for LCD display and differences compared to the original . In the original PIN 3 " Vcc - Power Supply for LOGIC " PIN 4 - " Vee - Power Supply for LCD Drive" and PIN 9 "Non Connection" and the new display is PIN 3 " Vdd + 5V Power Supply " PIN 4 " Vo - Contrast Ajustement " and PIN 9 " Vee - Negative Voltage output " . Resistors R158 and R159 I traded for 1k and 2k . U Displays are beautifully adjustable brightness from lightest to dark . + 5V I took directly from the motherboard sources . Odkza the site contractor . http://www.gmelectronic.com/lcd-graphic ... z-p513-250 . Something anyone would have thought ? Today we have a rehearsal with the band , so the tool 'll check and see . https://www.facebook.com/photo.php?fbid ... =1&theater + https://drive.google.com/folderview?id= ... sp=sharing
Last edited by Foret on Sun Jun 21, 2015 11:28 am, edited 1 time in total.
Live play the Yamaha SY77, Yamaha MX61, Kurzweil Artis SE, micro AKG, monitor their own production - mix with 4 keys stereo , keyboard stand of its own production , sometimes back vocal ,
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Re: New Screen Replacement Option

Unread post by knolan » Mon Jun 22, 2015 8:21 pm

HI Derek - thanks for that

To you - and anyone who has done this upgrade-

Can you tell me one other thing: On the page below they offer two options - one with Pin Header Soldered, and one without them soldered.

Which should I buy?

http://www.buydisplay.com/default/24064 ... te-on-blue



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Kevin.
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Re: New Screen Replacement Option

Unread post by Derek » Tue Jun 23, 2015 7:26 am

knolan wrote:HI Derek - thanks for that

To you - and anyone who has done this upgrade-

Can you tell me one other thing: On the page below they offer two options - one with Pin Header Soldered, and one without them soldered.

Which should I buy?

http://www.buydisplay.com/default/24064 ... te-on-blue



Cheers,
Kevin.
Hi, Kevin

If you don't order the one with the pin header soldered, then you will need to order a header and solder it yourself.

If this is for an SY77 then, looking at my original guide, a right angle header was used. There may be an issue of space if you use a vertical header (their option)

On the SY99 and TG77 the headers were upright (what they seem to be offering) should be fine.

Personally, I'd prefer to order my own keyed headers and fit them myself.

Those displays are also very good value, so I'm going to order a couple for spares! :)
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Derek Cook

http://www.carregddu.co.uk
http://www.echoes-music.co.uk
http://www.xfactory-librarians.co.uk
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Re: New Screen Replacement Option

Unread post by knolan » Wed Jun 24, 2015 1:38 pm

Hi Derek -

Thanks for your reply. Can you (or anyone who has done this) tell me if it's a challenge to do the soldering (as in - gaining access to each point, that is) - so I'm asking about soldering this particular connector - it looks tight ( I'm capable at ordinary soldering).

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Kevin.
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Re: New Screen Replacement Option

Unread post by Derek » Wed Jun 24, 2015 6:48 pm

Hi, Kevin

It depends on what you mean by "normal soldering"? 8O

If you can do clean solder joints with a fine tip soldering iron (e.g. standard electronic hobbyist iron) then it should be within your capability. The pitch spacing of the pins is 0.1 inches (2.54mm), so as long as you have a steady hand, that should not be an issue!
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http://www.echoes-music.co.uk
http://www.xfactory-librarians.co.uk
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Re: New Screen Replacement Option

Unread post by ledan » Wed Aug 05, 2015 8:38 pm

I'm also waiting for my display (from BuyDisplay). I also ordered righ-angled headers (ebay), variable resistor(s) (ebay) and a couple of through-hole resistors (from 1/4/5/10/etc kohm). I will follow Dereks guide when it gets to that (i guess the hardest part will be finding/desoldering that 5volt lead).

BuyDisplay screen seems to accept 5 volts (not 3.3) btw so they should be fairly straight-forward (but again, many people here have done the swap so that is proof of that :-)).
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Re: New Screen Replacement Option

Unread post by Derek » Wed Aug 05, 2015 9:36 pm

ledan wrote:I'm also waiting for my display (from BuyDisplay). I also ordered righ-angled headers (ebay), variable resistor(s) (ebay) and a couple of through-hole resistors (from 1/4/5/10/etc kohm). I will follow Dereks guide when it gets to that (i guess the hardest part will be finding/desoldering that 5volt lead).

BuyDisplay screen seems to accept 5 volts (not 3.3) btw so they should be fairly straight-forward (but again, many people here have done the swap so that is proof of that :-)).
Sounds,like you're ready! Good look!

It might be worth looking at some of the other guides you find on YamahaForums, as I think some people have avoided some of the steps I took, like swapping the diodes to the other side of the TG77 display board, but I can't remember how they managed to avoid it.

If the BuyDispkay screen is a 5V backlight (like the original display I dropped in my SY77) then yes, that will be easier.
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Derek Cook

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Re: New Screen Replacement Option

Unread post by ledan » Sun Dec 27, 2015 11:30 pm

Took a while, but tonight i finally leaped on the installation. It went amazingly well (thank to various guides here - thank you gents for those).

I used the display from "buydisplay" as well, and settled for a 5.4k ohm resistor on R158. It works well, but i would really like to use a higher value (~6 would be perfect i guess) since right now, it looks perfect when the contrast is at a minimum (starting to turn it, the display becomes too washed up).
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Re: New Screen Replacement Option

Unread post by Derek » Mon Dec 28, 2015 8:59 am

Another SY77 looking good! :)

If you replaced R158 with a 10K trim pot, that would give you the range you need, and allow you to adjust it to suit.
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Derek Cook

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Re: New Screen Replacement Option

Unread post by ledan » Tue Dec 29, 2015 8:17 pm

Thx Derek. It looks amazing.

But for the record: today i did replace the R158 with a variable resistor (<=10k ohm) and that did nothing at all. From this, i assume that i should instead focus on the R159 and put the resistor there instead (putting back the 5.7 that i used previously on 158). Of course, this is purely a "nice to have" since it looks perfect right now (but with the contrast pot at the minmum setting).
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Re: New Screen Replacement Option

Unread post by ledan » Tue Dec 29, 2015 9:25 pm

It nagged me so i opened it again and replaced 159 as well (with var. Resistor). It is 100% now :-D
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Re: New Screen Replacement Option

Unread post by Miks » Tue Dec 29, 2015 10:29 pm

ledan wrote:It nagged me so i opened it again and replaced 159 as well (with var. Resistor). It is 100% now :-D
Well done - good boy! (Y)
My (key related) gear (in alphabetical order):
Ferrofish: B4000+
Kawai: K1 II
Korg: M1 (up'd to EX, w/ 'Cool Blue'), M1REX (w/ 'Cool Blue'), Poly-800
Roland: D-50, D-110, D-550, PG-1000
Yamaha: AW1600, DX7IID (w/ 'Cool Blue'), EX5R, RM50, RX5, SY99 (w/ 'Cool Blue'), TG500,
TX-802, YMM2
Sector101: SYEMB05 (5x), SYEMB06 (3x), EXFLM2 (1kit), MCD Sweet16 (1x), DataBlade32 (1x),
WaveBlade 8MB Card (1x) & 1x Programmer Unit for WaveBlade
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