Help ID-ing a Zener

[Tim]

I have a nice Radio Shack 2 Line cordless phone that went poof on me,
and let out the magic smoke. I opened it up and found some damage around
the battery and power area. One of the damaged components is a zener
marked D503 on the board. It has a number 6 and the next line is either
A3 or a triangle and number 3. The closest thing I have found on the web
is a RS faxback at

http://support.radioshack.com/support_phones/doc43/43690.htm

but the part numbers don't come close to what I see on the board. My
phone is an older model, and I suspect the design has changed a lot. The
RS part number on mine is 43-696, and the one on the faxback doc is 43-
696a.

I believe this zener is the regulator in the circuit to charge the 3.6V
battery.

Anyone got some insight into this one?

Useful comments are always appreciated.

Thanks,

- Tim -

 

[Franc Zabkar]

On Fri, 18 Apr 2008 17:43:03 -0300, Tim <tim@tim.tim> put finger to
keyboard and composed:

I have a nice Radio Shack 2 Line cordless phone that went poof on me,
and let out the magic smoke. I opened it up and found some damage around
the battery and power area. One of the damaged components is a zener
marked D503 on the board. It has a number 6 and the next line is either
A3 or a triangle and number 3. The closest thing I have found on the web
is a RS faxback at

http://support.radioshack.com/support_phones/doc43/43690.htm

but the part numbers don't come close to what I see on the board. My
phone is an older model, and I suspect the design has changed a lot. The
RS part number on mine is 43-696, and the one on the faxback doc is 43-
696a.

I believe this zener is the regulator in the circuit to charge the 3.6V
battery.

Anyone got some insight into this one?

Useful comments are always appreciated.

Thanks,

- Tim -

Could it be a HZ6A3? That's a 5.6V, 500mW zener.

See http://www.datasheetarchive.com/pdf/1683027.pdf

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.

 

[Tim]

In article <1ani04h4lud8qb1v4sarluqhos0m6kuiej@4ax.com>,
fzabkar@iinternode.on.net says...

On Fri, 18 Apr 2008 17:43:03 -0300, Tim <tim@tim.tim> put finger to
keyboard and composed:

I have a nice Radio Shack 2 Line cordless phone that went poof on me,
and let out the magic smoke. I opened it up and found some damage around
the battery and power area. One of the damaged components is a zener
marked D503 on the board. It has a number 6 and the next line is either
A3 or a triangle and number 3. The closest thing I have found on the web
is a RS faxback at

http://support.radioshack.com/support_phones/doc43/43690.htm

but the part numbers don't come close to what I see on the board. My
phone is an older model, and I suspect the design has changed a lot. The
RS part number on mine is 43-696, and the one on the faxback doc is 43-
696a.

I believe this zener is the regulator in the circuit to charge the 3.6V
battery.

Anyone got some insight into this one?

Useful comments are always appreciated.

Thanks,

- Tim -

Could it be a HZ6A3? That's a 5.6V, 500mW zener.

See http://www.datasheetarchive.com/pdf/1683027.pdf

- Franc Zabkar

Well now that looks like the puppie.

It may be a moot point tho as I put a 5.1v in the handset, and the phone
still will not charge or power up. I suspect when the zener opened up,
it let a surge through that took out more than the diodes and traces
around the battery connector. The wall wart on this phone is 9v, so the
zener failing let the full voltage hit the rest of the handset. I
believe the whole thing started with bad solder connections on the
battery connector. The pin connector practically fell out when I opened
the phone.

Your info was very helpful.

Thank you.

- Tim -