Question about Yamaha RX-V457 Receiver
This unit has an intermittent power problem. Sometimes it turns on and sometimes it doesn't.
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
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
G'day i have had the Same Problem With a Yamaha RX-V750 That i have Repaired...You need to Replace the Three Capacitors On the Sub-Transformer Board...They Hold a Small amount of current to use to turn over the transistors and in turn trip a relay that boots the unit these go dry all the time in these units..replace them and it will work again no prob's
Components As Follows:
2x 2.2 uF 100V (C402) (C403)
1x 1uF 50V (C401)
The relay also could be damaged...or the diode across the Coil you may have to replace these too these faults could have been caused by a surge...or just faulty cheap and nasty components!!
Posted on Jul 09, 2009
Tips for a great answer:
Nov 04, 2012 | Bose & Wave& Music System
Jul 13, 2012 | Sony FD Trinitron WEGA KV-32FS120 32" TV
Jun 25, 2012 | 1993 Acura Integra Hatchback
Oct 17, 2011 | 1996 Oldsmobile LSS
Jul 04, 2011 | 1995 Oldsmobile Cutlass Supreme
382 people viewed this question
Usually answered in minutes!