W054 Zener diode, what is it?

Andypairo · 18th December 2003, 07:22 AM

While fixing an old Luxman tube pre-amp (CL-32) I noticed that the turn-on delay relay was not working (the relay was going immediately on/off with the power supply), so I checked the semiconductors on the little board and found 2 bjts and this zener faulty.

The zener was marked W054 but, finding no info about it, I guessed it could be a 5.4V zener (I discarded the 54V idea because the bjts are rated 35V).
Putting a 5.6V zener at its place made things work again, but I wonder if I used the right component.

Can anyone help me?

Cheers

Andrea

KCC · 25th December 2003, 03:40 AM

I have a similar situation here.While repairing a Yamaha M2 power amp I encountered a bad zener diode that has a "10" marking on it. I have also seen other Japanese zeners with "3" or "5" marking on them.And that's all. I assumed that they mean 3 volts ,5 volts and 10 volts accordingly. The 10 volts zener is termed as HZ6CIL in the service manual.I've checked many places and no body knows what that is. I replaced that with a 10 volts zener 1N4740 and seemed to be working so far.

Peter

KCC · 25th December 2003, 03:45 AM

I have a similar situation here.While repairing a Yamaha M2 power amp I encountered a bad zener diode that has a "10" marking on it. I have also seen other Japanese zeners with "3" or "5" marking on them.And that's all. I assumed that they mean 3 volts ,5 volts and 10 volts accordingly. The 10 volts zener is termed as HZ6CIL in the service manual.I've checked many places and no body knows what that is. I replaced that with a 10 volts zener 1N4740 and seemed to be working so far.

Peter

Netlist · 25th December 2003, 09:52 AM

Peter,
This is probably your diode: http://www.renesas.com/avs/resource/...08118_hz_l.pdf
Andrea,
W054? Can’t find it

/Hugo

KCC · 25th December 2003, 04:20 PM

Netlist,
Thanks for the pdf. I've finally come to know the specs of this zener.Appreciated.

Peter

Netlist · 25th December 2003, 04:31 PM

Quote:

Originally posted by KCC
Appreciated.

Thanks

/Hugo - only one click away...

18th December 2003, 07:22 AM	#1
Andypairo diyAudio Member Join Date: Sep 2002 Location: near Milano , Italy	W054 Zener diode, what is it? While fixing an old Luxman tube pre-amp (CL-32) I noticed that the turn-on delay relay was not working (the relay was going immediately on/off with the power supply), so I checked the semiconductors on the little board and found 2 bjts and this zener faulty. The zener was marked W054 but, finding no info about it, I guessed it could be a 5.4V zener (I discarded the 54V idea because the bjts are rated 35V). Putting a 5.6V zener at its place made things work again, but I wonder if I used the right component. Can anyone help me? Cheers Andrea

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
regulated PS - with Zener diode	ErikdeBest	Tubes / Valves	13	3rd July 2012 05:36 PM
Zener Diode Question	Captn Dave	Tubes / Valves	12	17th June 2009 08:16 AM
zener diode question	mike49504	Car Audio	2	2nd September 2007 06:17 AM
Quicksilver zener diode mod	newears	Tubes / Valves	19	31st December 2004 10:41 PM
Zener diode indentification!	bbakota2000	Parts	2	22nd March 2004 11:55 PM

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

25th December 2003, 03:40 AM	#2
KCC diyAudio Member Join Date: Mar 2002 Location: Edmonton	I have a similar situation here.While repairing a Yamaha M2 power amp I encountered a bad zener diode that has a "10" marking on it. I have also seen other Japanese zeners with "3" or "5" marking on them.And that's all. I assumed that they mean 3 volts ,5 volts and 10 volts accordingly. The 10 volts zener is termed as HZ6CIL in the service manual.I've checked many places and no body knows what that is. I replaced that with a 10 volts zener 1N4740 and seemed to be working so far. Peter

25th December 2003, 03:45 AM	#3
KCC diyAudio Member Join Date: Mar 2002 Location: Edmonton	I have a similar situation here.While repairing a Yamaha M2 power amp I encountered a bad zener diode that has a "10" marking on it. I have also seen other Japanese zeners with "3" or "5" marking on them.And that's all. I assumed that they mean 3 volts ,5 volts and 10 volts accordingly. The 10 volts zener is termed as HZ6CIL in the service manual.I've checked many places and no body knows what that is. I replaced that with a 10 volts zener 1N4740 and seemed to be working so far. Peter

25th December 2003, 09:52 AM	#4
Netlist diyAudio Moderator Emeritus Join Date: Jan 2003	Peter, This is probably your diode: http://www.renesas.com/avs/resource/...08118_hz_l.pdf Andrea, W054? Can’t find it /Hugo

25th December 2003, 04:20 PM	#5
KCC diyAudio Member Join Date: Mar 2002 Location: Edmonton	Netlist, Thanks for the pdf. I've finally come to know the specs of this zener.Appreciated. Peter