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Old 18th December 2003, 07:22 AM   #1
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Default 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
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Old 25th December 2003, 03:40 AM   #2
KCC is offline KCC  Canada
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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
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Old 25th December 2003, 03:45 AM   #3
KCC is offline KCC  Canada
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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
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Old 25th December 2003, 09:52 AM   #4
Netlist is offline Netlist  Belgium
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Peter,
This is probably your diode: http://www.renesas.com/avs/resource/...08118_hz_l.pdf
Andrea,
W054? Canít find it

/Hugo
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Old 25th December 2003, 04:20 PM   #5
KCC is offline KCC  Canada
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Netlist,
Thanks for the pdf. I've finally come to know the specs of this zener.Appreciated.

Peter
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Old 25th December 2003, 04:31 PM   #6
Netlist is offline Netlist  Belgium
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Quote:
Originally posted by KCC
Appreciated.
Thanks

/Hugo - only one click away...
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