Author Topic: NE 2554 no T/T  (Read 1582 times)

Offline Duffy

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NE 2554 no T/T
« on: August 14, 2015, 10:57:35 AM »
The touch pad on the NE 2554 that I picked up the other day does not work. With the phone plugged in I get dial tone, but when I push the buttons the dial tone goes faint and I get no tones from any of the buttons. Any ideas?
CDN Doug

unbeldi

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Re: NE 2554 no T/T
« Reply #1 on: August 14, 2015, 10:59:56 AM »
Have your tried reversing the polarity of the phone line?
No. 35 dials needed proper polarity and your set doesn't seem to have a polarity guard.
« Last Edit: August 14, 2015, 11:03:52 AM by unbeldi »

Offline Duffy

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Re: NE 2554 no T/T
« Reply #2 on: August 14, 2015, 11:06:07 AM »
No, I haven't. I'll do that later this afternoon and report what happens. I'm some what of a newbie went it comes to phone wiring.

Thanks
Doug
« Last Edit: August 15, 2015, 04:31:30 AM by Autonut »
CDN Doug

Offline Duffy

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Re: NE 2554 no T/T
« Reply #3 on: August 14, 2015, 03:06:51 PM »
Didn't work. Still dial tone, but no t/t.
CDN Doug

Offline NorthernElectric

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Re: NE 2554 no T/T
« Reply #4 on: August 14, 2015, 04:43:08 PM »
I am not 100% sure on this but I think you need to move the slate-white hookswitch wire from RR to F on the network.  I recently got a 2500 dialing out by doing this after reading a few posts on here that suggested it.  This connection disagrees with this diagram, but agrees with this one

PS.  I reread my post and I think I may have actually done the opposite, so that it was connected like yours.  The phone is no longer a 2500, so I can't check it.  It was originally a 500 and refurbed into a 2500.  I turned it back into a 500.  Still, it seems odd that the 2 diagrams I linked to show that wire connected to different terminals, albeit using different networks.
« Last Edit: August 14, 2015, 04:55:27 PM by NorthernElectric »
Cliff

Offline Duffy

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Re: NE 2554 no T/T
« Reply #5 on: August 14, 2015, 05:12:29 PM »
I changed out the key pad with another one and it worked. Then I put the old key pad into the donor phone and it didn't work. So I guess it's the key pad.
CDN Doug

Offline twocvbloke

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Re: NE 2554 no T/T
« Reply #6 on: August 14, 2015, 06:29:53 PM »
Could be dirty contacts on the dial, though a bit more in-depth to clean up compared to a rotary dial's contacts, but still achievable with a bit of card stock and patience... :)

Offline poplar1

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Re: NE 2554 no T/T
« Reply #7 on: August 15, 2015, 09:50:23 AM »
I am not 100% sure on this but I think you need to move the slate-white hookswitch wire from RR to F on the network.  I recently got a 2500 dialing out by doing this after reading a few posts on here that suggested it.  This connection disagrees with this diagram, but agrees with this one

PS.  I reread my post and I think I may have actually done the opposite, so that it was connected like yours.  The phone is no longer a 2500, so I can't check it.  It was originally a 500 and refurbed into a 2500.  I turned it back into a 500.  Still, it seems odd that the 2 diagrams I linked to show that wire connected to different terminals, albeit using different networks.

I'm not really familiar with these, but I think the NT  QSQE2500AX -- with the switchhook slate-white lead on F -- is the set with a combined network/dial ("E phone?")...notice that the "dial network" are all one unit. The other terminals --"F1, C1, TX1, TX2, TX3, CS3, RX and RX2" -- are also different from the 425-type network found in the NE 2500D or 2554B.

So the "disagree" diagram is the correct one for this NE 2554B. Shown in  practice 502-510-450CA. It shows the 35Q3A dial in the diagram, which is apparently wired the same as the "NE35Q3AX" dial shown in the photo.
« Last Edit: August 15, 2015, 09:54:50 AM by poplar1 »
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Offline Duffy

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Re: NE 2554 no T/T
« Reply #8 on: August 15, 2015, 09:17:09 PM »
It's the key pad, I sprayed it with contact cleaner and compressed air. Nothing, just a faint dial tone when the buttons are pushed. It's beyond capabilities. 
CDN Doug