Nakamichi SR-4 not powering up

calvin14 · 25th May 2009, 03:34 PM

I have a old Nakamichi SR-4 that has this problem off not powering up. I've sent it for repair, and the occurence seem be lessen, but still happens occasionally.

When this happens, the power led will blink and the amp will refuse to power up. I read that alot of these Naks have the same problem because of the output transistors.

Can anyone enlighten me on this?

And does anyone have, or know where to download a copy of the service manual for this model?

Thanks in advance.

calvin14 · 26th May 2009, 11:15 AM

anyone help?

sakis · 26th May 2009, 01:30 PM

magical soloution is going to be given by any forum member i think .....

are you any handy with electronics ????

could be tuning issue
could be small leak causing ofset in the out and that is trigering protection
could be a loose contact
could be a number of things ....

you have to apply the "basic procedures " are you any familiar with that ???? cause if not it is not really easy to do such a troubleshooting through emails or posting here ....

regards sakis

25th May 2009, 03:34 PM	#1
calvin14 diyAudio Member Join Date: Apr 2009	Nakamichi SR-4 not powering up I have a old Nakamichi SR-4 that has this problem off not powering up. I've sent it for repair, and the occurence seem be lessen, but still happens occasionally. When this happens, the power led will blink and the amp will refuse to power up. I read that alot of these Naks have the same problem because of the output transistors. Can anyone enlighten me on this? And does anyone have, or know where to download a copy of the service manual for this model? Thanks in advance.

26th May 2009, 01:30 PM	#3
sakis diyAudio Member Join Date: Jan 2006 Location: nea makri athens greece	NO ..... magical soloution is going to be given by any forum member i think ..... are you any handy with electronics ???? could be tuning issue could be small leak causing ofset in the out and that is trigering protection could be a loose contact could be a number of things .... you have to apply the "basic procedures " are you any familiar with that ???? cause if not it is not really easy to do such a troubleshooting through emails or posting here .... regards sakis __________________ SERVICE ΙΑΠΩΝΙΚΩΝ ΜΗΧΑΝΗΜΑΤΩΝ ΗΧΟΥ www.eastelectronics.gr

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26th May 2009, 11:15 AM	#2
calvin14 diyAudio Member Join Date: Apr 2009	anyone help?

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