[sdiy] Emu XL7 Keypad - Light Sensor

[foRUMS 4 punkdISCO]

Just order a few of the below.  Free next day delivery.

 

http://www.mouser.co.uk/Search/Refine.aspx?Keyword=QRE1113

 

> Good luck

 

Ill need a miracle!

 

:)

 

Will let you know how I get on..

 

Thanks all,

 

Paul

London

www.punkdisco.co.uk

 

From: random variate [mailto:randomvariate at hotmail.co.uk] 
Sent: 28 January 2016 22:06
To: foRUMS 4 punkdISCO <forums at punkdisco.co.uk>; synth-diy at dropmix.xs4all.nl
Subject: RE: [sdiy] Emu XL7 Keypad - Light Sensor

 

Flux and a fine conical solder bit.

I use a flux pen. 

Helps the small surface area rid itself of oxides and for the solder to bind.

I add solder to each pad first, place component into position, then heat each pad to melt solder under the pad and fuse component to board. 

Trick is to find a method to hold the component steady in place!

Good luck

Tim

  _____  

From: foRUMS 4 punkdISCO <mailto:forums at punkdisco.co.uk> 
Sent: ‎28/‎01/‎2016 22:00
To: synth-diy at dropmix.xs4all.nl <mailto:synth-diy at dropmix.xs4all.nl> 
Subject: Re: [sdiy] Emu XL7 Keypad - Light Sensor

Super big thanks Tom and Simon..

 

Assuming I can find the part (this seems likely) will it be very difficult to solder Out/In?  Ive done a reasonable amount of DIY soldering but only one big through hole stuff..

 

Ta,

 

Paul

London

www.punkdisco.co.uk <http://www.punkdisco.co.uk> 

 

From: Tom Bugs [mailto:admin at bugbrand.co.uk] 
Sent: 28 January 2016 21:43
To: synth-diy at dropmix.xs4all.nl <mailto:synth-diy at dropmix.xs4all.nl> 
Subject: Re: [sdiy] Emu XL7 Keypad - Light Sensor

 

I thought 'photoreflector' but then looking at Mouser that term should maybe be changed to 'optical switch, reflective'
Here are some:
http://www.mouser.co.uk/Optoelectronics/Optical-Switches/Optical-Switches-Reflective-Phototransistor-Output/_/N-abusl/?No=25
>From a quick scan there may be something similar.

Worth giving Emu tech a shout to see if you can get a parts number?

On 28/01/2016 21:29, foRUMS 4 punkdISCO wrote:

Hi all

 

I have a new Emu XL7 (a complete blast!) but one of the keypads is very flaky (mainly dead).

 

It is definitely not the rubber pad or the rubber contacts.  I’ve cleaned these all up and done various experiments..

 

I think the issue is a flaky light sensor of some description..  In the below picture, the square component marked U1 is some sort of light sensor; you can trigger the sounds by putting your finger over these.  Anyway, the faulty one I can get working by pressing it around a bit but after I re-assemble, it eventually stops working again.

https://farm2.staticflickr.com/1470/24047199144_8e49158937_b.jpg

 

So my questions are:

 

1)      What is this component?

2)      Will it be easy to find a modern replacement?

3)      It’s VERY small so is it going to be impossible to swap out?

 

Big thanks for any reply’s..

 

Paul

London

www.punkdisco.co.uk <http://www.punkdisco.co.uk> 

 





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