SS 3900F Frequency counter fault..

[Raverrst]

Hi Guys, As in title Iv a SS 3900F which seems to have two faulty green 7segment LED’s as there flashing/flickering, iv checked for dry joints, counter module looks all good etc, anything I’m missing to check? I’m thinking it’s the LED’s units themselves, has anyone a link or know where the correct ones can be purchased, had alook on the Bay can’t see the correct type..

Most grateful for any help

[ch25]

It's just typical 7-segment display.

[Raverrst]

Thanks for the reply, from what I’m finding on eBay etc, there’s to many contact pins and the physical sizes are wrong!?

[ch25]

Try Mouser instead.

[cb4ever104]

They're not the standard 16 pin LEDs. They might be the 10 pin ones that are used in the radios that have them built in. I've never had to remove these from the counter, so I'm not sure how easy a job it is. If you can get them out then you'll be able to test them. Just to add. You don't generally see flickering problems with LEDs , so it might be another issue. Normally they either work, or they don't. After all , they're just diodes.

[14CS06]

Hello

AFFICHEUR LED LSD3922(VERT)

EX03N40485

http://www.cbtricks.com/radios/galaxy/p ... 10021a.htm

http://robco.ath.cx/cb_tricks/radios/ga ... ds3922.htm

http://www.cbtricks.com/radios/galaxy/d ... 92x-xx.pdf



https://stores.goldeneagleradios.com/ga ... en-dx2517/




@+
Claude

[Queball]

I have a set of used ones if you are interested in them, also have the red ones that are a direct swop for the green ones.

[Raverrst]

Thanks very much for the info guys, very helpful indeed

Queball, Pm sent

[lambrettadave]

Is it not easier to replace the whole module?

I noticed on my Ronald that some parts of the digits weren't working.

[Raverrst]

Possibly if you can find a good one.

[cb4ever104]

Just wanted to add something. I initially read this thread incorrectly. I thought it was regarding the external counter with the harness. I now see it was about the internal 3900F style one. Each of the segments are controlled by one of the wires off that long connector. First thing I'd try to do would be to disconnect that connector and light up each segment separately using an 8v supply. That way you can see if the led is faulty, or if it's something on the module that's causing it.

[Raverrst]

Just wanted to add something. I initially read this thread incorrectly. I thought it was regarding the external counter with the harness. I now see it was about the internal 3900F style one. Each of the segments are controlled by one of the wires off that long connector. First thing I'd try to do would be to disconnect that connector and light up each segment separately using an 8v supply. That way you can see if the led is faulty, or if it's something on the module that's causing it.

That’s a very good Thought, I will definitely try this..

Thanks..

[Edd200sx]

There’s one counter on eBay for spares at mo

[lambrettadave]

There’s one counter on eBay for spares at mo

Have you got a link for it.

Thanks

[14CS06]

Hello

SUPERSTAR KF-VI "ROUGE" COMPTEUR DE FRÉQUENCE LED DE REMPLACEMENT CHIFFRES X6 - NEUF







https://www.ebay.co.uk/usr/cobraworxshopz/

https://www.ebay.co.uk/itm/273742309027 ... R9zVnevbYA

@+
Claude