Question about Marantz SR5007
Cant find any visible damage or shorted diodes or transistors on power supply.Could it be the TOP258MG ic?
Replacement of the TOP258MG IC Should resolve your problem. Make sure you have fully discharged all the caps on the primary side of the power supply before fitting your replacement IC as they are very easily destroyed during installation.
Posted on May 12, 2014
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Posted on Jan 02, 2017
SOURCE: We had a lightning strike
Try to unplug it ..cause it may be just in a protective stand by ..and after that ..take a look to teh settings ..and the other things that feeds the signal ..The error may came from another not working device ..(antenna or such ) Usually if they have no incoming signal ..they get into stand by after 10 minutes..or so ..
Posted on Aug 27, 2011
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Aug 09, 2014 | Marantz SR5007 Home Theater AV Receiver
Jan 29, 2014 | Radio Communications
Here are some basic steps that will help you fixing the problem.
I'm assuming that your unit is dead set without an standby LED
light and your outlet is live.1.Power cord - check the cord it might be opened (no
continuity).This is due to frequent bending,pulling. 2. Power switch - check for dry joints, open contact. 3.Check the internal fuse-
sometimes the fuse fail because of the power
surge, replacing with new one will cure the problem, If this is the case I
would advice you to use surge protector/AVR (Automatic Voltage Regulator).
However if the fuse blew again this is an indication that you have a shorted parts in the power supply, you may visit the
linkhttp://www.fixya.com/support/r8053361-fuse_keeps_blowing for more info. If no reaction and
still the unit didn't power up then you have an open parts on the power supply.
4.If you see that the fuse is intact , don't attempt to touch anything
because there some fatalcomponents
stored electricity enough to hurt you with a simple mistake only. I would
advice you to look for a
professional to troubleshoot
the power supply. If you want to repair it yourself make sure that you have
necessary tools and test
instrument. First check bad solder joints(re-solder all
cold solder), leaky
electrolytic capacitor(sometimes it has bulged at the top but not all, you better
have a capacitor checker), open/shorted regulator transistor/IC(mounted in heat
sink), open fusible resistor (caused by shorted regulator
Transistor/IC), shorted zener
You may also replace the entire power supply board, click this LINK.
Hope I helped you.
Thanks for using fixya.
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