Author Topic: WE500 L/M works but wiring differs from TCI Library  (Read 3105 times)

Offline recyklotron

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WE500 L/M works but wiring differs from TCI Library
« on: August 15, 2012, 10:33:23 PM »
Greetings,

We picked up this WE500 L/M dated to 1969 @ the flea a couple of weekends ago for $5. Wear & cosmetic issues are hopefully all that is wrong - my first attempt at sanding! It makes & receives calls & the ringer rings. However, when I checked the wiring diagram http://tinyurl.com/buoqdej
I noticed that some connections on the terminal strip are made to different points. Is this a problem?
Any help for these cracked rubber feet?

Thanks for your help.
Jonathan/recyklotron
« Last Edit: August 15, 2012, 11:49:50 PM by recyklotron »

Offline Phonesrfun

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Re: WE500 L/M works but wiring differs from TCI Library
« Reply #1 on: August 16, 2012, 12:40:09 AM »
It's probably ok if it works.  Many wiring differences are based on individual applications and are inconsequential.  However, you can't go wrong by wiring it to the diagram, but if it works, that's ok too.  It won't harm anything.
-Bill G

Offline gpo706

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Re: WE500 L/M works but wiring differs from TCI Library
« Reply #2 on: August 16, 2012, 01:17:18 AM »
"If it aint broke, don't fix it" as a wise man once said.
"now this should take five minutes, where's me screwdriver went now..?"

Offline poplar1

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Re: WE500 L/M works but wiring differs from TCI Library
« Reply #3 on: August 16, 2012, 02:32:28 AM »
Your phone is wired correctly according to Bell System Practice #502-580-405 (Nov. 1975) despite what the diagram on TCI site shows.

When the colors of the hookswitch wires changed to solid colors, instead of slate-yellow on L2 and slate-brown on C, they now used green on L2 and white on C (as in your phone).

The TCI diagram shows a variation in the normal wiring for a 500M set where the talk circuit connected to the red and green line cord wires, and the ringer to black and yellow (terminals 3 and 4). In other words, if you connect only the red and green wires, the phone as shown in the TCI diagram would not ring.

"C'est pas une restauration, c'est une rénovation."--François Martin.

Offline recyklotron

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Re: WE500 L/M works but wiring differs from TCI Library
« Reply #4 on: August 16, 2012, 11:28:12 PM »
Thanks for the sage advice.   I did try to look for a BSP but couldn't find it ! Searching for the BSPs is proving rather elusive for me...

Offline poplar1

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Re: WE500 L/M works but wiring differs from TCI Library
« Reply #5 on: August 17, 2012, 12:47:02 AM »
Search for 502-580-405 on TCI website: (Sorry, I can't figure out to post the link)

Click here: Document Details | 502-580-405 I4

This BSP is also contained in the Key Systems Service Manual Volume 1. The Key System Manuals and Station Service Manuals come up for sale at phone shows and on Ebay at times.
« Last Edit: August 17, 2012, 12:55:27 AM by poplar1 »
"C'est pas une restauration, c'est une rénovation."--François Martin.

Offline recyklotron

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Re: WE500 L/M works but wiring differs from TCI Library
« Reply #6 on: August 17, 2012, 11:36:11 AM »
Hi poplar1,
Sorry I wasn't more clear.  I was able to find the BSP from your response. I meant that I am having difficulty finding the BSPs on my own using  search terms that I think are logical. Originally I had searched for WE500 L-M and all that came back was that first wiring diagram which prompted my question to the group. Is this a case where you have to already be familiar with BSPs or am I missing something when I do a search for them?
Thanks again for your help,
Jonathan/recyklotron

Offline DavePEI

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Re: WE500 L/M works but wiring differs from TCI Library
« Reply #7 on: August 17, 2012, 12:37:11 PM »
Your 500L/M is wired as mine is...

Dave
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Offline paul-f

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Re: WE500 L/M works but wiring differs from TCI Library
« Reply #8 on: August 17, 2012, 01:58:43 PM »
I meant that I am having difficulty finding the BSPs on my own using  search terms that I think are logical. Originally I had searched for WE500 L-M and all that came back was that first wiring diagram which prompted my question to the group. Is this a case where you have to already be familiar with BSPs or am I missing something when I do a search for them?

Searching for BSPs by keyword is not the most reliable method.  The Library's keyword search depends on keywords that are identified by contributors and uploaded by administrators.

The most conservative way to search for BSPs is to hunt as you would with paper files.  The goal is to find a BSP number first, as BSPs are filed numerically in the binders.

1.  For 300/500/1500/2500/3500-series or Design Line telephone sets, try the charts on my site. (Click on the banner below this message.)  Look up the phone by model number and you should see a list of (some of) the BSPs to look for.  They may or may not be in the Library.

2. Otherwise, use the BSP index documents to search for BSPs.  There is a folder for index documents in the Library, plus you can find division index docs by searching for ddd-000-000.  For example, for telephone sets try 502-000-000 or 503-000-000.  Division codes are listed in the general index docs, such as 000-000-000.

You will find several issues for most index docs, as they were revised from time to time.  Select one closest to the date of the phone (or other equipment) you're looking for.

3.  Look up the BSP by searching for its full number.  Once again, you may get several issues, so pick the one closest to the date of interest.

This process can be a bit time consuming - especially at first, but often yields a lot of unexpected references to other interesting bits of knowledge that you'd miss otherwise.  It will also give you a good feeling for the size, scope and organization of the body of BSPs.  It was truly a staggering achievement.
Visit: paul-f.com         WE 500  Design_Line

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Offline cello973

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Re: WE500 L/M works but wiring differs from TCI Library
« Reply #9 on: March 19, 2013, 05:32:53 PM »
The phone in the picture is wired for 1A2 or 1A1 A-lead on the yellow black. And it should work just fine for T&R service
« Last Edit: March 19, 2013, 05:34:58 PM by cello973 »
Vince