Question about Sony STR-DE345 Receiver
One time i turn on so loud the fuse blownoff.i replace the fuse but every time i turn it on the display said (protect)thats all it wont work.
You many have a fraid wire or if you playing the unit to loud and overload the amp this may cause it to go to protect. Also is the the receiver properly vented. If it get to warm the receiver will also go into the protect mode. hope this helps
Posted on Oct 24, 2007
How to install Guide for Stereo Power Amplifier 3way input Pioneer Model GM-5.
Posted on Sep 20, 2009
I had this same problem with STR DE310. Problem was due to loose speaker wires causing a short. Re-attached wires, both at the tuner and at the speakers, problem solved.
Posted on Feb 12, 2008
The problem has nothing to do with the output, the problem sits in the small board with the yellow connectors, there is a dataflow from the frontand the masteboard and te data is interupted at a moment and tha gives "F70 " I repaird alredy some of them by replacing Q1701 and Q 1702 by BD649, (5V stabilizer ) they can have more power, also replace fuse F5 =1At internal resistance my be too large .
Mostly is it a fall down of the 5 volt that gives the F 70
The best solution is resoldering the print but this almost impossible because their may be some intreruptions between the solder and componentside
The board "REP3107G-T " is no longer available;.. Daniël from Belgium
Posted on Jan 09, 2008
Shouldnt there be a built in circuit breaker that turns the system off when you are overloading it? This is my experience with them - i usually blast the sucker but it just shuts off and works fine on reboot! - Put a fan on it so it doesnt get too hot!
Posted on Dec 16, 2007
Where are these fuses? My KLH R7000 does not have any exturnal fuses and the interior the only fuse is for the main power supply... am i missing something?
Posted on Nov 18, 2007
If you check the owners manual there is a menu for setting the power on volume, I had the same problem and fixed it with the manual.
Posted on Nov 05, 2007
Or keep it simple and find which speaker wire or speaker itself is shorted out. usually your positive wire it touching a negative either at the stereo or speaker connection. unplug 1 speaker at a time but do not play sound very loud. or just disconnect all and add one at a time until error comes back.
Posted on Jul 27, 2007
Check board grounding points.
Posted on Jul 09, 2007
Check to see if you put the correct fuse in the receiver, and if it is the correct one, you will need to check the protection circuit because with it being turned up so loud the amp was probably damaged. in most cases with protection circuits you will probably find your problem with an output transister. than check for blown caps.
Posted on Apr 01, 2006
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Posted on Jan 02, 2017
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