Please Help ID this... Diode?

jmlandry · 2nd June 2010, 08:27 PM

This red device (diode?) has a burnt area all around it. I assume the cap is bad along with a burnt resistor.

Is this a zenier diode? I do not have a schematic, however the back side of the board has the diode symbol and a long "Z" or "N" in front of it. I copied the markings off of the back of the board- they are on the pix, because they are hard to see through the burn marks. (see pix).

If it is a diode, what size would I replace it with???

Any help would be appreciated.

_john

Netlist · 2nd June 2010, 08:38 PM

Hard to tell. A zener is usually drawn like this
From the looks it reminds me of an old 1N4148.
Could you reverse engineer that small part of the circuit?

jmlandry · 2nd June 2010, 10:10 PM

I just paid $5.00 for a junk schematic! Problem still not solved. Thanks for the input Netlist.

mjf · 2nd June 2010, 10:19 PM

hello.
yes,looks like a (z)diode.........
have you tried to measure it (with a dmm)?
greets

jmlandry · 2nd June 2010, 10:21 PM

It looks like it got quite hot. I don't know if it would work???

The amp doesn't work, so I'm assuming that it is the faulty part. I got a junk schematic, maybe I'll chance it and replace it w/ a zenier?

mjf · 2nd June 2010, 10:39 PM

z diodes often run hot a little bit in operation.........
can you measure the voltage drop of this part?

jmlandry · 2nd June 2010, 10:43 PM

Yup,

I get .665 one way and open the other way. Holy diodes batman! I guess that it is working. The resistor near it is shot and maybe the cap is bad, the cause of the strife.

I'm a parts changer, not a wiz.

-John

mjf · 2nd June 2010, 10:58 PM

.........yes,looks like it is not burnt' through...........
btw cannot translate 'holy diodes batman' ?
greets

jmlandry · 2nd June 2010, 11:03 PM

YouTube - Holy, Holy, Holy - Batman

mjf · 2nd June 2010, 11:11 PM

..........yes......sometimes we have here "holy arnold (schwarzenegger)" but doesn't help in electronics..............
good night.....1 am.............

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Help me id this amp	MUSICNUTS	Solid State	2	28th February 2010 12:50 AM
SMD diode ID please	Perry Babin	Parts	5	8th October 2008 03:14 AM
diode bridge - 10000uF cap - diode tube - small cap - HV+	engels	Tubes / Valves	5	29th January 2008 10:16 PM
hybrid power supply: diode bridge into diode tube	engels	Tubes / Valves	8	24th September 2007 09:18 AM
Please help ID this:	martioz	Everything Else	0	27th June 2006 04:34 AM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

2nd June 2010, 08:38 PM	#2
Netlist diyAudio Moderator Join Date: Jan 2003	Hard to tell. A zener is usually drawn like this From the looks it reminds me of an old 1N4148. Could you reverse engineer that small part of the circuit?

2nd June 2010, 10:10 PM	#3
jmlandry diyAudio Member Join Date: May 2010 Location: Minneapolis, MN	I just paid $5.00 for a junk schematic! Problem still not solved. Thanks for the input Netlist.

2nd June 2010, 10:19 PM	#4
mjf diyAudio Member Join Date: Jan 2009 Location: upper austria/near linz	hello. yes,looks like a (z)diode......... have you tried to measure it (with a dmm)? greets

2nd June 2010, 10:21 PM	#5
jmlandry diyAudio Member Join Date: May 2010 Location: Minneapolis, MN	It looks like it got quite hot. I don't know if it would work??? The amp doesn't work, so I'm assuming that it is the faulty part. I got a junk schematic, maybe I'll chance it and replace it w/ a zenier?

2nd June 2010, 10:39 PM	#6
mjf diyAudio Member Join Date: Jan 2009 Location: upper austria/near linz	z diodes often run hot a little bit in operation......... can you measure the voltage drop of this part?

2nd June 2010, 10:43 PM	#7
jmlandry diyAudio Member Join Date: May 2010 Location: Minneapolis, MN	Yup, I get .665 one way and open the other way. Holy diodes batman! I guess that it is working. The resistor near it is shot and maybe the cap is bad, the cause of the strife. I'm a parts changer, not a wiz. -John

2nd June 2010, 10:58 PM	#8
mjf diyAudio Member Join Date: Jan 2009 Location: upper austria/near linz	.........yes,looks like it is not burnt' through........... btw cannot translate 'holy diodes batman' ? greets

2nd June 2010, 11:03 PM	#9
jmlandry diyAudio Member Join Date: May 2010 Location: Minneapolis, MN	YouTube - Holy, Holy, Holy - Batman

2nd June 2010, 11:11 PM	#10
mjf diyAudio Member Join Date: Jan 2009 Location: upper austria/near linz	..........yes......sometimes we have here "holy arnold (schwarzenegger)" but doesn't help in electronics.............. good night.....1 am.............

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)