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Scenic 06-18-2009 08:48 AM

decrypting cap datecodes
 
someone (i think it was kc8) posted how to decrypt the panasonic datecodes.
however.. i cant seem to find that thread/post.. :(

so... any idea how to decrypt those?

i just recently got a shitload of mixed, "new" (unused) pannys (mostly FJ 6,3V 2200uF 10x20mm, but some others too).. and i just wanted to know how old they really are..

oh.. and while we're at it..

Nippon ChemiCon datecodes?
Sanyo datecodes?

i guess this could get a general "cap datecode decrypting thread".. *lol* :D
(later maybe even sticky...?)

gdement 06-18-2009 10:27 PM

Re: decrypting cap datecodes
 
I don't remember the details, but I think I have it in a datasheet somewhere.

The most important point though is the first digit (on Panasonic) is the year.
You have to be able to assume what decade they're from, it doesn't tell. :)

They're very hard to read, the dark red color must be somebody's idea of a joke.

yanz 06-23-2009 12:43 AM

Re: decrypting cap datecodes
 
would be nice if there's someone volunteering for gathering all infos... ;)

gdement 06-26-2009 12:48 AM

Re: decrypting cap datecodes
 
1 Attachment(s)
Panasonic


3 different formats are listed in the PDF I have:

Code:

(A)(B)(C)(C):
                A=last number of year
                B=month (1-9, O=Oct, N=Nov, D=Dec)
                C=line code in alphabet (A to Z)

Code:

(A)(B)(C)(D):
                A=last number of year
                B=month (1-9, O/N/D)
                C=line code (A-Z)
                D=production date (A-Z:1st-26th, 1=27th, 2=28th, etc)

Code:

(A)(B)(C)(D)(D)
                A=last number of year
                B=month (1-9, O/N/D)
                C=week (Greek number: I for 1st week, II for 2nd wk)
                D=line code (A-Z)

I have no idea how one is expected to tell the difference between the first 2 formats. And I don't know why they use greek in the 3rd format. Or why the year is only 1 digit. Or why it's printed in dark red. Or how hard Panasonic tried to come up with a system that sucks this much. Sorry.

PDF attached. I probably won't be doing any others as I don't think I have documentation for them.

PCBONEZ 06-26-2009 03:00 AM

Re: decrypting cap datecodes
 
My guess for chemicon from looking at them on mobos [that I know how old they are] is that chemicon use a 2 digit code and the first digit is the year.
For example:
A 2001 vintage board has Chemicons marked 1 (2)
A 2004 vintage board has Chemicons marked 4 (7)
A 2007 vintage board has Chemicons marked 7 (7)
- I haven't found any where the first digit doesnt make sense for the year.

At first I thought the character in the ( ) was for the month but I've seen a 'k' used there so I'm not sure about that. If it is for the month then I have no idea what the code is.
.

yanz 06-26-2009 08:18 PM

Re: decrypting cap datecodes
 
Quote:

My guess for chemicon from looking at them on mobos [that I know how old they are] is that chemicon use a 2 digit code and the first digit is the year.
i assume it like that too..

RJARRRPCGP 04-21-2014 08:20 PM

Re: decrypting cap datecodes
 
Sorry to revive this thread. I have a question.

I was given a microphone where the date codes appear to be late-80s.

One looks like 87 and on what looks like a transformer, 88.

But, wondered about the tiny Nichicon cap, looks like a tiny electrolytic cap and says "N8x" Where "x" is a number.
It's a different format than on early 2000s motherboards.

Heihachi_73 04-22-2014 12:24 AM

Re: decrypting cap datecodes
 
Usually Nichicon has a standard 4-digit date code like (letter prefix) 0123. With the tiny caps (e.g. 5mm height), the 8 probably means 1988, 'x' being the month. I have a few tiny caps pulled from a 1989 Sony camcorder PCB dated between N945 and N950.


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