Question about Audio Players & Recorders
Removed top cover checked fuse ok theres a round thing near the fuse that is clicking when turned on and off but front panel wont light up was working fine yesterday wont go today
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Posted on Jan 02, 2017
SOURCE: No Power
in your power board near the back of transformer you have a backup power source of 5volts. that is for the cpu and the power relay swicth. can you check if you have that 5volts present. What i can see only in your unit is a major brekadown of your main amp section, all power transistros must be busted/shorted, and no chance even for a click on the relay. that is also feature of the protection. you wont be able to get the unit started even for a while. the fuses for yamaha do not normally blow and very often only your protection circuits enables. but in your case it is a very bad output stage now that you dont even get the display on to see the trouble in the built in diagnosis.
Posted on May 14, 2008
I am guessing that the ceramic resistor is close to the output transistors. I would also guess that one or more of the output transistors has shorted. This causes a high current draw that is blowing the fuse. You could also have a power supply problem. The ceramic resistor is a .22ohm dual emitter resistor that is used in the output stage. The transistors located close by are probably shorted and should be replaced. Start there and let us know what happens once the transistors and the resistor are changed.
Posted on Oct 10, 2008
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