Need help finding an IC for an old scanner

Need help finding an IC for an old scanner

Post by Mike » Fri, 19 Nov 1999 04:00:00

It's an old Regency HTX hand held that fried.

It looks like something fell off inside and crossed some pins on one of the
IC's.

Problem is, I can't find any electronics houses who can cross reference the
number I got off the chip.  I'm hoping that someone here has run across this
chip and knows of someone that sells it.

The number on the top of the IC is 10420 and it's 16pins.  That's it.  No
name, no letters, nothing.

Any ideas?

 
 
 

Need help finding an IC for an old scanner

Post by Actio » Fri, 19 Nov 1999 04:00:00


Not that I'm a 100% sure, but it MAY be a progged chip...
And the number is just the serial or progname...
In that case it would not help to find a similar chip, cause u need to prog
it with the same software as it has right now...
Try to get hold of those who made it and ask... (if they still exist :))

Action


>It's an old Regency HTX hand held that fried.

>It looks like something fell off inside and crossed some pins on one of the
>IC's.

>Problem is, I can't find any electronics houses who can cross reference the
>number I got off the chip.  I'm hoping that someone here has run across
this
>chip and knows of someone that sells it.

>The number on the top of the IC is 10420 and it's 16pins.  That's it.  No
>name, no letters, nothing.

>Any ideas?

 
 
 

Need help finding an IC for an old scanner

Post by Tony Szablowsk » Fri, 19 Nov 1999 04:00:00


>The number on the top of the IC is 10420 and it's 16pins.  That's it.  No
>name, no letters, nothing.

Try Mouser.com or Digikey.com.  I doubt you'll have any luck, even if you
do find the same IC because that chip's probably a programmed IC.

---
Regards,
Tony

 
 
 

Need help finding an IC for an old scanner

Post by Mike » Fri, 19 Nov 1999 04:00:00


>Could be a TK10420 which is an IF chip. Buy it from Radio Shack, 1-800-
>843-7422, part number 10903672.

Well, this seems like the most viable solution so far.  That SKU number showed
up on a web search on this page

http://support.tandy.com/support_phones/doc23/23689.htm

...and seems to be the right description.

I just hope it's not a proprietary programmed IC like some of the responses
indicated.

For $7, it's worth the gamble !

Thanks for the help.

 
 
 

Need help finding an IC for an old scanner

Post by pet.. » Sat, 20 Nov 1999 04:00:00

Could be a TK10420 which is an IF chip. Buy it from Radio Shack, 1-800-
843-7422, part number 10903672.

Sent via Deja.com http://www.deja.com/
Before you buy.

 
 
 

Need help finding an IC for an old scanner

Post by wigg » Sat, 20 Nov 1999 04:00:00



>>Could be a TK10420 which is an IF chip. Buy it from Radio Shack, 1-800-
>>843-7422, part number 10903672.

>Well, this seems like the most viable solution so far.  That SKU number showed
>up on a web search on this page

>http://support.tandy.com/support_phones/doc23/23689.htm

>...and seems to be the right description.

>I just hope it's not a proprietary programmed IC like some of the responses
>indicated.

>For $7, it's worth the gamble !

>Thanks for the help.

The TK10420 is the main FM IF/Discriminator/amplifier chip that is
used in numerous scanners such as the Pro-2035/2042/2006/etc. It was a
very popular IC made by TOKO which unfortunately has been
disconnected. It was made in pretty large numbers that it is able to
be found at several locations. There are two models of this chip, DIP
and DSO....same chip...just different pkg. You could find the part
number under the detailed parts listing of the forementioned scanners
at http://support.tandy.com.

Wiggie

 
 
 

Need help finding an IC for an old scanner

Post by pet.. » Sat, 20 Nov 1999 04:00:00

TK10420 is not a programmable IC and it is discontinued. The part
number I listed previously is for the 16 pin dip, not the surface
mounted package. Since you indicated your scanner is old, I expect it
does not use surface mount parts.

Sent via Deja.com http://www.deja.com/
Before you buy.

 
 
 

Need help finding an IC for an old scanner

Post by Mike » Sat, 20 Nov 1999 04:00:00


>TK10420 is not a programmable IC and it is discontinued. The part
>number I listed previously is for the 16 pin dip, not the surface
>mounted package. Since you indicated your scanner is old, I expect it
>does not use surface mount parts.

Excuse my ignorance, but I'm not sure I know the difference.  Mine is just an
IC that is soldered directly to the pcb.  What's included in the surface
mounted package?  Is that just an IC socket?
 
 
 

Need help finding an IC for an old scanner

Post by Mickey McInn » Sat, 20 Nov 1999 04:00:00


|>
|> >TK10420 is not a programmable IC and it is discontinued. The part
|> >number I listed previously is for the 16 pin dip, not the surface
|> >mounted package. Since you indicated your scanner is old, I expect it
|> >does not use surface mount parts.
|>
|> Excuse my ignorance, but I'm not sure I know the difference.  Mine is just an
|> IC that is soldered directly to the pcb.  What's included in the surface
|> mounted package?  Is that just an IC socket?

"Surface mount" components mount to the surface of the PC board.  The
board has flat metal pads on the surface of the board and the component
has leads "glued" to these pads by solder.  "Surface mount" is in
contrast to the older "pin through hole" packaging where the component
has pins that go through holes in the board, and are then soldered to
metal pads around the hole the other side of the board.

Surface mount devices tend to be smaller, and you can mount them to both
sides of the board without having to worry about the pins getting in
the way of each other.  You also don't have the cost of having these
holes drilled through the PC board.

--

--
All opinions expressed are my own opinions, not my company's opinions.