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President HR2510 troubles!

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  #1  
Old 08-31-2010, 06:43 PM
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Default President HR2510 troubles!


Hi all. New to this forum. By what I have read tonight, here might be the place where I can get some good advice.
I have an old President HR2510 that was made in Taiwan before they were reportedly moved to China to mfg.? Don't know if this makes any difference on my question?
This thing has about 80 hrs. of use on it and then stored indoors very carefully for many years.
I now turn it on and the display lights up but there is nothing on the display.
There is a final (transistor) mounted to the chassis on the left hand side 1/3 way from the front and it gets warm fairly quickly just by turning the radio on with out Xmiting.
The inside is super clean and can't see anything evident.
Any ideas?
Hope I posted in the right section? If not mods please move post.
Thank you all in advance,, tracker.


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Old 08-31-2010, 07:10 PM
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Welcome to the forum.
This subject comes up often, have a look here.
Lincoln HR2510 - defective
And you can also use the "search" function On the tool bar at the top of the forum, search for "hr2510"
The Glue that is used to hold down the Voltage regulators on the CPU board in a lot of the older radios can dry out and become conductive, and /or damage the very fine copper traces below the glue.
Power down the radio, unhook it, pull the covers, and very carefully "lift" the regulators loose from where they are glued down on the CPU board, and again carefully, pick the old glue away from the board looking for damage to the traces under the glue. Use a wooden skewer or plastic pick something that will not cause damage to the traces on the surface of the board.
In quite a few of these older radio`s, just breaking the reg`s loose from the glue will bring them back to life.
Let us know how you make out. There is a Member here, Rogerbird, He is The Man on these radio`s, the HR2510/HR2600/LINCOLN...if you need help, he is the "go to Guy" for these radios.

73
jeff
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Old 08-31-2010, 07:26 PM
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Thanks AudioShockwav.
I have done some reading and don't seem to find anyone with that final heating up so quickly, will read some more!!
This radio barely has any glue in it, 2 Caps that are in good shape on the underside and for the lack of words or knowledge, on 2 donut shaped ceramic coils which seem fragile in nature on the top board?
Yes, I was reading Rogerbirds posts. I surely could upload some pics if needed.
The glue is tan brown!!
The small bottom board is dated 1988 uniden. HCT-58NY 94V-0
tracker.

Last edited by tracker1962; 08-31-2010 at 08:17 PM.

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Old 09-01-2010, 09:57 AM
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The Finals in the Hr 2510/2600 radio`s are mounted in the rear of the radio ( final, Q132/ driver,Q133) IC 107 (That I think you are calling a final) Is Mounted on the Left side rail of the radio. It is also a voltage regulator, it will get warm during operation...it should not get HOT, but it is bolted to the chassis to sink the heat it produces during operation.
The Voltage reg`s referred to are on the CPU/PLL-Board and are almost always secured to the board with the glue.
The CPU drives the LCD Display from pins number 1 thru 5, but if the reg`s are shorted due to the glue, the radio will not function.
As said in the other thread, Capacitors that have become old and non functioning are a common problem in these and for that fact any radio that is getting on in years and/or has been stored for quite a while.
Yes pictures can help, and also, is the unit "hearing anything?
As in the other post, do you hear an increase in the rx noise level when an antenna is attached?

73
Jeff
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When I was a child
I caught a fleeting glimpse
Out of the corner of my eye.
I turned to look but it was gone
I cannot put my finger on it now
The child is grown,
The dream is gone.
but I have become comfortably numb.

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Old 09-01-2010, 01:51 PM
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Attached are a few pictures. Sorry for the watermark as I got this program in a snap as I don't have much need to resize pictures.
#1575edit; shows the voltage regulator? after 20 seconds or so of powering up, the screw that fastens it gets so hot that I can't keep my finger on it!
#1579; shows the only place that there is glue in this particular radio.
#1581; is the bottom side.
#1582; is a close up of the voltage regulator that gets really hot.
#1584; is a pic between the 2 boards.

AudioShockwav, as far as hearing, yesterday it would hear on FM only.
Today I hooked it up to my 2 meter antenna (all thats up right now) and with the squelch opened up, I could not hear anything.
If I can't get this fixed, would anyone know where in Canada I could send it to get serviced even though it's been modded for 10 meter.
tracker
Attached Images
File Type: jpg DSCF1575edit.jpg (482.0 KB, 28 views)
File Type: jpg DSCF1579.jpg (437.5 KB, 25 views)
File Type: jpg DSCF1581.jpg (443.4 KB, 29 views)
File Type: jpg DSCF1582.jpg (326.4 KB, 20 views)
File Type: jpg DSCF1584.jpg (401.8 KB, 20 views)

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  #6  
Old 09-01-2010, 03:26 PM
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The Third Picture from the top, the "Tray" that holds the little board that has the CPU and associated parts on it, Look at the 3 legged IC`s.. There are two of them..see how they are held down to the PC board with the glue?
These are the Reg`s that I am talking about....... if the glue has become slightly conductive, and they are providing a high resistance path to ground, it could be helping with overloading the first Reg going into the radio.
This will also prevent the reg`s on the CPU Board from working properly, as well as it could have damaged the traces below the glue its self.
I would start with carefully lifting these reg`s away from the glue/board and see if the radio will power up with a display, if not, then, again working carefully, pick the glue away from any traces below the glue. Get a good Magnifying glass and very closely inspect any traces under the glue to see if they have been damaged.
The Glue around the output section of the radio looks nasty as well and should be carefully removed, but the problem you are having with the display not working is not back there.....
I do not know of any one up north that works on these radio, I do know that Rogerbird is very good with them, and I have heard that Doc`s is also good.
Last I contacted Rogerbird this was his e mail
Rogerbird1@netscape.net
He also stops here on the forum from time to time to offer his help with these radio`s

73
Jeff
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When I was a child
I caught a fleeting glimpse
Out of the corner of my eye.
I turned to look but it was gone
I cannot put my finger on it now
The child is grown,
The dream is gone.
but I have become comfortably numb.

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  #7  
Old 09-01-2010, 07:15 PM
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Sorry, the third picture down,, the wire which seems like is glue is actually a wire that was taped off with tape during the 10 meter mod.
I see that you would think it was glue, but no glue is present there.
In 1989 mods were done in a different way. Not the best mind you but knowledge of the day!!
The only glue, what little of it is in this radio is on the back top side main board.
2 caps and 2 ferrite donuts, a drop, dropped off on the way out to the back right hand side.
This radio is clean, clean, clean and has a very low serial number as I pre-purchased it before they came on the market.
I appreciate all your help.
I have a friend from Northern N.Y. coming to visit me soon.
Maybe I will ship it off with him and see if Roger or Doc can look at it.
I AM NOT,, giving up on my HR!!
tracker

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Old 09-01-2010, 08:03 PM
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Quote:
the wire which seems like is glue is actually a wire that was taped off with tape
No that is not what i am talking about.
On the PC board, The Small board, that is in the tray above the main board, not on the main board of the radio itself, but on the board that has the CPU on it, there are 2 IC`s, they a 3 terminal Voltage regulators, If you look at them very closely, they are held down to the board with a drop of glue, in fact, if you look at the hole in the tab of the ic`s ( where a screw is used to mount them in other applications) you can see the glue and it looks like it has turned dark brown.
This is what I am talking about. I have seen many of these radio`s and the regs are almost Always held down with glue.
Take a close up picture of just the board that is mounted in the tray that you had to lift up to show the underside of the board.....that board, inside the tray is the one that has the CPU on it...it controls the radio.
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When I was a child
I caught a fleeting glimpse
Out of the corner of my eye.
I turned to look but it was gone
I cannot put my finger on it now
The child is grown,
The dream is gone.
but I have become comfortably numb.

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