STATIC... Partner ACS ports vs 206EC ports

[Kinneman]

Hello Everyone:

I have a partner II R4.1 system (got it new from AT&T) and the 206EC cards seem to have a common problem with static in the phone ports. I bought some off ebay and even they had at least one port with static.

Does the ACS R6 and R8 have this same problem with the phone ports - or are they more reliable?

Also - who do you recommend for someone that does component level repairs to the 206ec cards (to repair the static). It is likely from old caps, but there are many in these cards.

I can replace parts well enough, but I don't have a clue which parts are the offenders - have you worked on these enough to give me some suggestions? I can't get these new anymore, so I either need to find a good repair shop, figure out which parts to change myself - or upgrade to ACS. Any help is gratefully appreciated.

Kinneman

 

[exsmogger]

It's usually the 12 47mfd 63v capacitors (2 per port)that are the main offenders. But static can also be caused by bad transistors or diodes. Weak power supplies are also a culprit in many cases. The ACS is not immune to this problem. It can also have bad capacitors, bad IC's and bad power supplies. Given their age I'd say the ACS is marginally better.

Brian Cox
Georgia Telephone

http://Georgia-Telephone.com

http://www.linkedin.com/in/briancox1952

 

[Kinneman]

Hello Brian - thanks for the help again. Can you suggest a good place to buy these caps? The electronics place near me (SoCal) is very high priced everything. One of my modules has no static until it's been on a while - then it gets static in the same port every time. It's worth it to swap these and see how it works out.

Thanks again - I really appreciate the help.

Hinneman

 

[exsmogger]

I get most of my electronic components from

http://www.mouser.com

Brian Cox
Georgia Telephone

http://Georgia-Telephone.com

http://www.linkedin.com/in/briancox1952

 

[Kinneman]

Thank you - I will take a look at mouser.com.

 

[Kinneman]

Hey Brian -

In response to your post above where you wrote this about 206ec modules:

"It's usually the 12 47mfd 63v capacitors (2 per port)that are the main offenders."

I decided to switch these and see if it helps - but... These caps are Nichicon PL(M) series - the PL series was discontinued and I found a post somewhere else that says they were supersceded by the PM series. This particular cap is high temp, long life and extremely low impedance. I'm having a hard time finding a suitable replacement.

If you have replaced these yourself, can you tell me what you put in place of the old caps (specifically - brand and part number).

Thanks very much,
Dale

 

[Kinneman]

I found the cap I was looking for! For those who might need the information, here it is:

It is Nichicon 47uF 63V Ultra Low Impedance 105 degree Celsius Radial lead capacitor. It has marking "PL" on the side. That was discontinued and the replacement is a "PM" series - same specs. The can itself is 5mm diameter and 11.5mm tall (it measures closer to 12mm but the spec says 11.5mm. It is rated at 5000 hours. Mouser doesn't sell it, but Digikey does.

The Nichicon part number is: UPM1J470MPD or PM1J470MPD.

Since the original cap that fails are Nichicon, can anyone suggest a different brand that has better reliability?

Respectfully,
Dale

 

[Kinneman]

Well I goofed. I looked on the Mouser website several times and I couldn't find this capacitor - then after I sent the email above - there it was on the Mouser website. Sorry for the mistake.

Dale