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[UPDATE] Got an extra 7 segment dual LED display? SUCCESS!!!

Started by FiftyQuid, 07/05/2012, 08:51 PM

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FiftyQuid

With the help of KC (Keith Courage) I managed to get my broken CD unit up and running again.  Unfortunately, after powering it up I discovered one of the LEDs was burnt out.  Now I know this isn't a big deal.  I mean, how often do you look at the LED display on the CD unit?  Well, it's bothering me.  I don't like that my precious TG-CD is not displaying the numbers correctly.

Here's what it looks like with the number 19 displayed.  Looks good right?
IMG

Well not so much so when you get to track 20.
IMG

So I decided to desolder it and bring in down to my local electronics shop.  Unfortunately for me, they only carried single disply, not the dual's.  Here is what it looks like out of the TG-CD;

IMG

IMG

I would like to fix this.  On to my options;

1) Does any have a busted beyond repair TG-CD for sale with a working LED display?
2) Does any one have a spare 7 segment dual display kicking around?
3) Does any one know the dimensions of the 7 segment dual display in the TG-CD?  I don't have a digital ruler handy.
4) Could someone point me to a possible vendor on the internet for a replacement.  Yes, I'm familiar with Google, but I'm hoping someone has experience with ordering electronics of this type online.

Thanks in advance.
I'm busy playing pinball, but I still drop by to visit.

FiftyQuid

#1
Jesus!  Sorry about the size of the images.  I figured the forum would auto size everything.

[EDIT] Okay, so apparently that number on the side is an actual part number.  So I no longer need any of the specs for this part.  However, 3 of my 4 questions are still valid.

1) Does any have a busted beyond repair TG-CD for sale with a working LED display?
2) Does any one have a spare 7 segment dual display kicking around?
3) Does any one know the dimensions of the 7 segment dual display in the TG-CD?  I don't have a digital ruler handy.
4) Could someone point me to a possible vendor on the internet for a replacement.  Yes, I'm familiar with Google, but I'm hoping someone has experience with ordering electronics of this type online.
I'm busy playing pinball, but I still drop by to visit.

HercTNT

If no one here has what your looking for, contact these guys, they may be able to help.

http://www.retrogamecave.com/

FiftyQuid

Quote from: HercTNT on 07/05/2012, 09:20 PMIf no one here has what your looking for, contact these guys, they may be able to help.

http://www.retrogamecave.com/
Good idea.  I'll write up a message now, but I won't send it.  I'll wait a couple days to see if anyone here can help me.
I'm busy playing pinball, but I still drop by to visit.

thesteve


thesteve


thesteve


thesteve


FiftyQuid

Thanks steve.  Looking at them now.  Looks like I need a digital ruler to make sure the new one has the proper clearance.  None of them have the same character high (6mm) as the original.
I'm busy playing pinball, but I still drop by to visit.

GameFreak

If the blue one fits that would look awesome. But I think the light cover over the LED is already tinted red, but that could be modded with a clear lens easily. hmmm...ideas

FiftyQuid

Quote from: GameFreak on 07/06/2012, 12:51 AMIf the blue one fits that would look awesome. But I think the light cover over the LED is already tinted red, but that could be modded with a clear lens easily. hmmm...ideas
I was just going to ask what everyone thought of the colour choices.  Green was my go to colour, but blue might be nice.  It would come out purple because of the cover over the LED.

Right now I'm trying to locate a digital slide ruler so I can measure the size of the original component.  I was hoping I could use the character height, but 6mm doesn't seem to be an option.  7.1mm is as close to original as I've been able to find.
I'm busy playing pinball, but I still drop by to visit.

NecroPhile

Quote from: FiftyQuid on 07/06/2012, 03:06 PMI was just going to ask what everyone thought of the colour choices.
I'd want yellow or orange to go with the TG-16 coloring.
Ultimate Forum Bully/Thief/Saboteur/Clone Warrior! BURN IN HELL NECROPHUCK!!!

thesteve

if nothing else the original could be repaired, by drilling and inserting a new led

FiftyQuid

Quote from: guest on 07/06/2012, 03:32 PMI'd want yellow or orange to go with the TG-16 coloring.
Nice!  I hadn't thought of that.

Quote from: thesteve on 07/06/2012, 03:48 PMif nothing else the original could be repaired, by drilling and inserting a new led
I'm not sure I'm up for that, but I will if it comes to it.
I'm busy playing pinball, but I still drop by to visit.

FiftyQuid

#14
Posting this here as a reference.  LB-202VB datasheet.

Rohm Semiconductor produced the LB-202VB for NEC back in the 90's.  The company is still in business;
http://www.rohm.com/products/opto_device/led_display/numeric/#03

The LB-202VB was produced in four standard colours:  red, orange, green, yellow.  It is an Anode device.

Quote from: FQ's email to ROHM Semiconductor ~ Jul 7, 2012This is going to be an odd request.  I want you to know this now.  Back in the 90's your company produced the LB-202VB for a video game peripheral called the TurboGrafx-CD.  Well I still have one and one of the LEDs has died.  I am looking for a replacement and you are my last hope.  Other LEDs on the market, including the ones you sell now, are too large.  I thought I would take a chance and see if you have a drawer of LB-202VB in storage gathering dust.  If you do, I would greatly appreciate being sent a 'sample' of this product.  If you do not have the VB version, the DB, YB, or MB would also be greatly appreciated.  Please feel free to contact me at my personal email address for more info (***************).  I would prefer to find the part that fits rather than modify and barnacle an equivalent part.  Thank you very much for your time.
This company may actually sell the original part:  http://www.sbonwe.com/StockEn/L/LB-202VB.html
I'm busy playing pinball, but I still drop by to visit.

thesteve

all the current ones are pinned different

FiftyQuid

That won't be an issue if I can find an original part.  It shouldn't be much of an issue if I have to use an after-market part either.  It'll just be an incredible pain in the ass to barnacle it to the PCB.
I'm busy playing pinball, but I still drop by to visit.

thesteve

wouldnt be too bad
you could use a SMD one for space reasons

FiftyQuid

I'm not too worried about the width and length.  It's the height.  

BTW, I emailed retrogamecave and while they were very nice they did not have any spare parts.
I'm busy playing pinball, but I still drop by to visit.

FiftyQuid

#19
*double post*

ROHM Semiconductor actually responded to my query.  Unfortunately, it's not good news.  :cry:

Quote from: ROHM SemiconductorGood afternoon Tim,

Unfortunately, we do not have any LB-202 LED displays in stock.

While not the exact same package dimensions (0.3 mm smaller width) or color variety, you may be interested in the following following:
http://www.rohm.com/products/opto_device/led_display/numeric/lb-302mf/
http://www.rohm.com/products/opto_device/led_display/numeric/lb-302vf/

Note, there is also a disparity in pin-out.

Product samples can be obtained from one of our distribution partners found at the following link:
http://service.stkcheck.com/?mfg=73164481-1808-449e-8974-2d558ac54708
It looks like the lb-302vf (red) is my best bet here.  Now I need to get a sample and figure out how to rewire it.
I'm busy playing pinball, but I still drop by to visit.

thesteve


FiftyQuid

Quote from: thesteve on 07/09/2012, 09:52 PMthose are what i linkd you before
Yes, I know that.  You get full credit. :)  It was just in their email and I'm quoting it.
I'm busy playing pinball, but I still drop by to visit.

thesteve

lol i know
the red i listed is from another mfg, but the other colors are 302 series from them
all wired the same

FiftyQuid

I'm busy playing pinball, but I still drop by to visit.

FiftyQuid

So after many, many months of waiting I finally received a replacement 7 segment dual LED display.  Tonight I put the kids in bed and plugged in the soldering iron.  Well after soldering the replacement LED to the PCB and reassembling the TG-CD...

SUCCESS!!!   :dance:

Here's what it looks like BEFORE;

IMG

And here is the AFTER;

/dscn7472s.jpg

I would like to say THANK YOU to LostFlunky for sending me the LED display out of a busted CD unit he purchased.  Not only did he send it to me, but he sent it on his dime at zero cost to me!  THANK YOU LostFlunky!

I can now enjoy my TG-CD in peace.  :D
I'm busy playing pinball, but I still drop by to visit.

LostFlunky

Nice work!  Now that's a special looking LED right there!

It's a great feeling when you fix something yourself.  Thanks for sharing!

Drakon

https://16bitgamer.canadian-forum.com/

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LostFlunky

I bought a junk unit from a japanese seller for parts.  It looked like it had been taken apart years ago and forgotten about.  I needed the piece that slides along the worm gear.