Question about Yamaha RX-V650 Receiver
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Posted on Jan 02, 2017
SOURCE: yamaha rx-1500 av receiver
The unit is in protect mode. There is a problem with the last stage of the amplifier section and the unit shuts down to prevent further damage. The most common cause if this is shorted output transistors. If you are comfortable with soldering, you should be able to repair this. Check the transistors attached to the heatsink for a shorted condition. Replace them in pairs.
Keep us posted.
Posted on May 20, 2008
I suggest you run self diag. press [FM/AM] key + [Input mode] key and press the [power/standby] switch.
ps prt = power supply problem
dc prt = shorted output or leakly cap in channel
tmp prt means to hot on heatsink
you'll likely have to measure the resistances of the output FETs to find a short,
Posted on Feb 03, 2009
You've probably already tried this, but...
Disconnect power from the mains, remove lid.
Reseat all the low-power connectors in the unit.
Check the thermister on/near the main transformer.
Check capacitors on or near power supply for obvious anomalies (fattness, leaking, smoked, etc.)
Replace lid and, plug back in, do a rain dance and hope.
Posted on Mar 04, 2009
There is a common psu problem occurring on a few Yamaha models from ~4 yrs ago. Any Yamaha dealer should know what it needs. probably the mod component in the stby supply.
Doubt it would be a micro fault.
Posted on Nov 07, 2009
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