Casio CZ/ VZ/ FZ - Pro Series

Hi, Caleb,

yes, this is LED backlit display, yellow-green. You can find also  
other colors if you prefer.

Power for backlit (pins 15 and 16) goes from pins 1 and 2. Solder  
small wire bridges isolated with plastic after soldering the cables.  
See my description. Check if your display doesn't need limiting  
resistor - some have it on the board and don't need it.

It's not quite easy to get to the display, you have to remove boards,  
and be very careful with flat transparent plastic cables.
Then just disconnect display cable from the main board, and unscrew  
some screws keeping plastic sheet and display. Work slowly, use small  
cups or boxes for groups of screws and add description where they came  
from, and take a lot of pictures. It will help you during reassembling.

Yes, you have to desolder cable from the old display and solder it to  
the new display. Solder shortly, display is heat sensitive. Old cables  
have different colors, you can write down the order, or do it one by  
one.

Don't forget to remove protective foil from the glass before mounting  
the display, and clean panel inside the instrument as well as display  
glass just before putting it inside (vacuum cleaning is good idea).  
There's nothing more infuriating than to find some small dirtiness or  
dust on the screen when finishing the job and closing everything.

Good luck!

Daniel Forro

On Dec 31, 2016, at 10:43 PM, Caleb Garner caleb.garner@...  
[CZsynth] wrote:

>
>
> so will this display give you a backlight?  if so how do you get  
> power to it since the original was not intended to be back lit.   
> Awesome job bringing it back.  How involved is the lcd display to  
> swap?  soldering involved?
>
> Thanks!
> Caleb
>
> On Sat, Dec 31, 2016 at 2:27 AM, Daniel Forró danforcz@...  
> [CZsynth] <CZsynth@yahoogroups.com> wrote:
>
> Today I have finished the repair of CZ1000:
> - cleaning
> - cleaning some metal parts from the rust
> - repair of cartridge cover - new spring made from the guitar string
> - cleaning cartridge slot contacts
> - resolder power connector
> - replacement of display
> - setting display contrast
> - adding screw washers to keep better the screening shield on the  
> bottom  　　　　
>
> I have used New Haven display NHD-0216BZ-FL-YBW ordered at Mouser,  
> it came after four days!
> As it has limiting resistor on the board, it's enough to connect pin  
> 16 to pin 1 and pin 15 to pin 2.
> Contrast can be set with VR4 on the main board near display connector.
> Display is thicker but there was no problem to use original screws  
> and tighten them as much as possible.
>
> So far so good.
>
> Happy New Year to everybody!
>
> Daniel Forro 　
>
>
> On Dec 24, 2016, at 12:48 AM, Daniel Forró danforcz@...  
> [CZsynth] wrote:
>
>>
>>
>> OK, I will take some pictures.
>>
>> Today I have opened it and start to disassembly it. It's not so  
>> easy as boards are connected by flat plastic cables which are  
>> soldered on both ends... grrrrr... so unpleasant and service  
>> unfriendly. Similar way as on cheap Casio portables from that times  
>> - I did cleaning and repairs of my MT65... at least they have used  
>> there flat cables with relatively thick wires inside. Here it's  
>> much more fragile, just thin foil and inside metal traces. I have  
>> to be very careful not to break some. If so, better to desolder it  
>> and use standard wires. The reason for this is they wanted to save  
>> money...that's why there are no multi pin connectors.
>>
>> Inside I have found some rusty screws, and also some pieces of rust  
>> on some metal parts. Will clean everything after full disassembly.
>>
>> I couldn't find any problem with power connector, there's no cold  
>> solder, no cracks... Probably just the connector needs good  
>> cleaning inside, and adjusting the contact. High humidity here in  
>> Japan during summer is guilty for the oxidation...
>>
>> Also contacts for cartridge had green color from oxidation, I had  
>> cleaned it very carefully with fine sand paper.
>>
>> Another problem was with cover of cartridge slot. It was fixed  
>> inside with transparent sticker tape, and the reason was that  
>> spring which should keep it closed was broken. Evidently previous  
>> owner didn't use cartridge. So I made new spring from guitar  
>> string, works perfectly now. I have RAM-3 cartridge, originally for  
>> my CZ3000 but there it can be used only for data backup. CZ1000  
>> offers direct access to 16 programs so I will use it now with this  
>> instrument, it's more flexible. Still I have another rare cartridge  
>> which offers 4 banks.
>>
>> Keyboard is quite OK, it doesn't need cleaning.
>>
>> So now I have to order LED display and replace the original one. It  
>> will take some time...
>>
>> Daniel Forro
>>
>>
>> On Dec 24, 2016, at 12:26 AM, Michael Lim raffles1968@...  
>> [CZsynth] wrote:
>>>
>>> Very interesting! Could you post pics of your adventures as you  
>>> try to "revive" this vintage keyboard?
>>>
>>> Regards
>>> Michael
>>>
>>> On Friday, December 23, 2016, 3:23 PM, Daniel Forró danforcz@... 
>>> m [CZsynth] <CZsynth@yahoogroups.com> wrote:
>>>
>>> Today I have found a nice looking CZ1000 like a new one in the  
>>> nearest
>>> recycle shop, in junk department proclaimed as non working. Price  
>>> was
>>> 4.6 USD, so I couldn't leave it there.
>>>
>>> Using proper adapter at home I could make it work on the first  
>>> switch
>>> on. I'm quite sure that instruments have a soul and can feel they  
>>> are
>>> in good hands. So far so good.
>>>
>>> Everything is OK, but power connector board is probably somehow
>>> moving, or there's a cold contact on the connector itself - when I
>>> move with it, sometimes instrument switches off. Opening the
>>> instrument will probably take more time than the repair :-)
>>>
>>> There's a small coin battery in the holder inside the battery
>>> compartment, it looks like previous owner did this modification to
>>> keep data when power off. I don't like similar amateur looking  
>>> mods so
>>> will think twice if to leave it there or remove.
>>>
>>> The next step will be replacing the display for modern one with LED
>>> backlight as I did with my CZ3000.
>>>
>>> Merry Christmas!
>>>
>>> Daniel Forro
>>>
>>>
>>>
>>
>>
>>
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