is it possible to replace D550 display with display from D50 keyboard?

is it possible to replace D550 display with display from D50 keyboard?

Post by Scot » Sun, 13 Sep 1998 04:00:00



Please let me know if you know ;)
just to swap out only the display,
replace one with the other..
I like my D550, but like looking
into the D50 non-backlit display
much better.  They *should*
be compatible 'cause they're the
same type?     ?        
thanks,
Scott
 
 
 

is it possible to replace D550 display with display from D50 keyboard?

Post by ---GT- » Tue, 15 Sep 1998 04:00:00




Quote:>Please let me know if you know ;)
>just to swap out only the display,
>replace one with the other..
>I like my D550, but like looking
>into the D50 non-backlit display
>much better.  They *should*
>be compatible 'cause they're the
>same type?     ?        
>thanks,
>Scott

Maybe it's like with a pocket calculator; when you turn the
transparent plastic screen that's over the LCD around, everthing on
the display will be inverted.

 
 
 

is it possible to replace D550 display with display from D50 keyboard?

Post by frippi » Fri, 18 Sep 1998 04:00:00


Scott,
the difference between the two displays may seem negligeable
to the * eye, but that's probably as far as it goes.
The units (though they may have similar funtions) are
different.  The biggest difference (at a glance) being the
backlit display.
You must remember that when dealing with LCD technology, you
are in essence talking about thousands of little diodes
which enable & restrict the flow of electricity through the
LCD grid, and in turn allow the liquid to "appear" in the
display at the correct times.  Even the slightest difference
between the two grids could spell catastrophe if the signals
through the display are incorrect.
Check the markings on the back of the printed circuit board
of both displays.  ONLY if the markings are identicle, would
I suggest trying what you are asking.  Even then, I would
compare the traces & components mounted on the board just to
make sure.  This is touchy stuff... not like replacing an op
amp or even a vaccum tube...
You may have better luck disabling the light on the backlit
unit... the axial bulbs should be visible from the edges of
the LCD display module.  Simply cut the axial leads to the
bulbs and you should be fine.  If the LCD unit fails to work
(voltage supplies for the LCD grid could be routed through
them) simply solder in a jumper wire accross the axial leads
of each lamp (but only do this if the LCD looses power).
good luck... if you need further assistance, feel free to
Email me.
-peace frippit
 
 
 

1. FS: Roland D550 module & D50

Roland D550 module with memory card and original manual - excellent
condition and very clean: $575

Roland D50 Keyboard needing repair (left channel output is dead) - U
Repair: $195. All key, controller and midi functions intact. Roland Corp
would not repair this unit due to an installed multitimbral card. So
remove it first if you plan to have Roland Corp repair it.

-------
Also available:
Ensoniq KMX-8 midi 8x8 patch bay (mint!): $135
Mac Software: Freestyle 1.04 Orig disks and manuals (no registration): $65
Mac Software: Performer 5.02 Orig disks and manuals (no registration): $75
Mac Software: Performer 5.5 Orig disks and manuals (no registration): $145
Mac Software: Logic 2.5.4 Orig disks, hardware key and manuals (no
registration): $150
Mac Software: Unisyn 1.17 Orig disks and manuals (no registration): $95

UPS-COD shipping only (inquire).

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