diode identification

S

Steve

Guest
I'm trying to find the specs for a diode out of an LCD TV. The TV
model # is LC-15SH7U, made by Sharp. The diode designation is D910.
The best I can tell is it's a clamp for the 33V supply, but I'm not
sure, I can't find the service manual anywhere. The markings on the
diode are as follows:
ZC (perpindicular to diode axis_
43
7*4 (the asterisk is just a dot)
both the 43 and 7*4 are underlined, the 7*4 has a second underline.

The body measures .09in wide, .12in long.

Unfortunately, it's dead shorted so I can't find out what the voltage
was. It's labeled on the board as a zener.

Thanks for any help,
Steve
 
"Steve" <s@s.c> wrote in message
news:iovho45r63kd7i1j1c984bbst8bj2onui1@4ax.com...
I'm trying to find the specs for a diode out of an LCD TV. The TV
model # is LC-15SH7U, made by Sharp. The diode designation is D910.
The best I can tell is it's a clamp for the 33V supply, but I'm not
sure, I can't find the service manual anywhere. The markings on the
diode are as follows:
ZC (perpindicular to diode axis_
43
7*4 (the asterisk is just a dot)
both the 43 and 7*4 are underlined, the 7*4 has a second underline.

The body measures .09in wide, .12in long.

Unfortunately, it's dead shorted so I can't find out what the voltage
was. It's labeled on the board as a zener.

Thanks for any help,
Steve
Click to expand...
is this of any help
http://pdf1.alldatasheet.com/datasheet-pdf/view/29925/TOSHIBA/1ZC43A.html
 
"Steve"
I'm trying to find the specs for a diode out of an LCD TV. The TV
model # is LC-15SH7U, made by Sharp. The diode designation is D910.
The best I can tell is it's a clamp for the 33V supply, but I'm not
sure, I can't find the service manual anywhere. The markings on the
diode are as follows:
ZC (perpindicular to diode axis_
43
7*4 (the asterisk is just a dot)
both the 43 and 7*4 are underlined, the 7*4 has a second underline.

The body measures .09in wide, .12in long.
Click to expand...

** SMD or not??



...... Phil
 
On Tue, 03 Feb 2009 20:45:59 -0600, Steve <s@s.c> put finger to
keyboard and composed:

I'm trying to find the specs for a diode out of an LCD TV. The TV
model # is LC-15SH7U, made by Sharp. The diode designation is D910.
The best I can tell is it's a clamp for the 33V supply, but I'm not
sure, I can't find the service manual anywhere. The markings on the
diode are as follows:
ZC (perpindicular to diode axis_
43
7*4 (the asterisk is just a dot)
both the 43 and 7*4 are underlined, the 7*4 has a second underline.

The body measures .09in wide, .12in long.

Unfortunately, it's dead shorted so I can't find out what the voltage
was. It's labeled on the board as a zener.

Thanks for any help,
Steve
Click to expand...
I don't know about digital sets, but a 33V supply in an analogue TV is
usually required for generating tuner voltages.

For example, my Sanyo set uses a uPC574J 33V tuning voltage reference.
It has a low temperature coefficient (+/- 1mV/degC) and low dynamic
resistance (10 ohms). Some early Philips sets used a TAA550B.

Here is an NTE "Integrated Circuit Voltage Stabilizer for Electronic
Tuner":
http://www.nteinc.com/specs/600to699/pdf/nte615p.pdf

FWIW a ZC43 diode cross-references to an NTE5145A which is a 43V 5W
zener.

See http://www.nteinc.com/specs/5100to5199/pdf/nte5111a.pdf

There are also TZC43, TZC43A, TZC43B, CTZC43C, CTZC43CA, and CTZC43CB
devices which cross to NTE4944 and NTE4945 "Surge Clamping,
Unidirectional Transient Overvoltage Suppressors":

http://www.nteinc.com/specs/4900to4999/pdf/nte4903_99.pdf

None of the above devices matches your stated dimensions, though.

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.
 
On Thu, 05 Feb 2009 07:05:07 +1100, Franc Zabkar
<fzabkar@iinternode.on.net> wrote:

On Tue, 03 Feb 2009 20:45:59 -0600, Steve <s@s.c> put finger to
keyboard and composed:

I'm trying to find the specs for a diode out of an LCD TV. The TV
model # is LC-15SH7U, made by Sharp. The diode designation is D910.
The best I can tell is it's a clamp for the 33V supply, but I'm not
sure, I can't find the service manual anywhere. The markings on the
diode are as follows:
ZC (perpindicular to diode axis_
43
7*4 (the asterisk is just a dot)
both the 43 and 7*4 are underlined, the 7*4 has a second underline.

The body measures .09in wide, .12in long.

Unfortunately, it's dead shorted so I can't find out what the voltage
was. It's labeled on the board as a zener.

Thanks for any help,
Steve

I don't know about digital sets, but a 33V supply in an analogue TV is
usually required for generating tuner voltages.

For example, my Sanyo set uses a uPC574J 33V tuning voltage reference.
It has a low temperature coefficient (+/- 1mV/degC) and low dynamic
resistance (10 ohms). Some early Philips sets used a TAA550B.

Here is an NTE "Integrated Circuit Voltage Stabilizer for Electronic
Tuner":
http://www.nteinc.com/specs/600to699/pdf/nte615p.pdf

FWIW a ZC43 diode cross-references to an NTE5145A which is a 43V 5W
zener.

See http://www.nteinc.com/specs/5100to5199/pdf/nte5111a.pdf

There are also TZC43, TZC43A, TZC43B, CTZC43C, CTZC43CA, and CTZC43CB
devices which cross to NTE4944 and NTE4945 "Surge Clamping,
Unidirectional Transient Overvoltage Suppressors":

http://www.nteinc.com/specs/4900to4999/pdf/nte4903_99.pdf

None of the above devices matches your stated dimensions, though.

- Franc Zabkar
Click to expand...
Looks like Zack hit the nail on the head.
http://www.datasheetcatalog.org/datasheet/toshiba/3588.pdf
The layout is the same as the diode I have. I've never heard of ZC
series diodes before.

The voltage is labeled as Vt, so that could easily be tuner voltage.
There's still something wrong w/ the set, but at least now I can put
this mystery to bed.

Thanks for all the help,
Steve
 
On Wed, 04 Feb 2009 18:15:23 -0600, Steve <s@s.c> put finger to
keyboard and composed:

On Thu, 05 Feb 2009 07:05:07 +1100, Franc Zabkar
fzabkar@iinternode.on.net> wrote:

On Tue, 03 Feb 2009 20:45:59 -0600, Steve <s@s.c> put finger to
keyboard and composed:

I'm trying to find the specs for a diode out of an LCD TV. The TV
model # is LC-15SH7U, made by Sharp. The diode designation is D910.
The best I can tell is it's a clamp for the 33V supply, but I'm not
sure, I can't find the service manual anywhere. The markings on the
diode are as follows:
ZC (perpindicular to diode axis_
43
7*4 (the asterisk is just a dot)
both the 43 and 7*4 are underlined, the 7*4 has a second underline.

The body measures .09in wide, .12in long.

Unfortunately, it's dead shorted so I can't find out what the voltage
was. It's labeled on the board as a zener.

Thanks for any help,
Steve

I don't know about digital sets, but a 33V supply in an analogue TV is
usually required for generating tuner voltages.

For example, my Sanyo set uses a uPC574J 33V tuning voltage reference.
It has a low temperature coefficient (+/- 1mV/degC) and low dynamic
resistance (10 ohms). Some early Philips sets used a TAA550B.

Here is an NTE "Integrated Circuit Voltage Stabilizer for Electronic
Tuner":
http://www.nteinc.com/specs/600to699/pdf/nte615p.pdf

FWIW a ZC43 diode cross-references to an NTE5145A which is a 43V 5W
zener.

See http://www.nteinc.com/specs/5100to5199/pdf/nte5111a.pdf

There are also TZC43, TZC43A, TZC43B, CTZC43C, CTZC43CA, and CTZC43CB
devices which cross to NTE4944 and NTE4945 "Surge Clamping,
Unidirectional Transient Overvoltage Suppressors":

http://www.nteinc.com/specs/4900to4999/pdf/nte4903_99.pdf

None of the above devices matches your stated dimensions, though.

- Franc Zabkar

Looks like Zack hit the nail on the head.
http://www.datasheetcatalog.org/datasheet/toshiba/3588.pdf
The layout is the same as the diode I have. I've never heard of ZC
series diodes before.

The voltage is labeled as Vt, so that could easily be tuner voltage.
There's still something wrong w/ the set, but at least now I can put
this mystery to bed.

Thanks for all the help,
Steve
Click to expand...
It could be that your mystery diode is a protection zener that goes
sacrificially short circuit when an overvoltage condition develops.
Some Sharp VCRs employ a crowbar zener across the 30V rail for this
purpose. IME the root cause of the problem in the case of a VCR has
always been a bad electrolytic capacitor on the primary side of the
PSU.

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