Question about Amplifiers & Preamps
I love my receiver and want to keep it going for many more years. Everything works great except for the LED orange display. Black display area shows nothing. Power lights above buttons work and all sound is good. Kind of hard to operate without any display though. Is this any easy fix? Thanks, RedSonja
Parts list and exploded diagram of yamaha rx-v850 found free here:
Enjoy. They can get the bulbs for $1.40...
Posted on May 05, 2008
My RX-V870 had a burned out display bulb. The display is backlit orange, not fluorescent blue like many newer displays. Yamaha customer service said the original bulbs are 14.5V and 115mA, and no longer available. The closest I could find, at 14V and 80mA, was a "grain of wheat" Philmore 495 bulb at Frys dot com, item #2764833 for $2.19. The package says DC, which wasn't disclosed in the online listing, but my new bulb has worked fine for more than a week, so either (a) the bulb works on DC and AC, or (b) the receiver provides DC current to this little bulb (doubtful, but I'm no electronics expert). The only slight problem I ran into is that the new bulb is slightly fatter than the original, maybe 5mm vs. the original 4.5mm, but it still fits (snugly) into the opening behind the display window. Radio Shack sells a similar bulb #272-1141 at 12V and 25mA, about 5mm diameter, but the Fry's bulbs are a closer match to the original milliamperage, so that's what I went with. Just remove a few screws and lift off the cover. Gently pull off the small black rubber boot behind the display window (with small red and white wires coming out of it), then wiggle out the smaller orange boot with the bulb inside, and remove the white plastic plug from the circuit board. You'll need to clip the wires and splice (or solder and shrink tube) the wires from the new bulb onto the old wires.
Posted on Oct 23, 2014
I had the same problem although mine was my fault...I dropped my unit. As with yours, everything else works fine except the display. I was told by a company called Herman Electronics (www.hermanelectronics.com) the part number I need for my RX-V670 is YAMVJ805700 and it costs $47.80. When I questioned the cost as it seemed pretty high for a bulb, I was told the bulb is not sold separately; you have to buy and replace the entire display. However, I have also been told more model train hobby stores carry these types of bulbs. You simply need to make sure the bulb size is right and that you know the correct voltage. Does anyone know for sure the voltage that goes to the bulb?
The part number for the LCD display is YAMVJ805700 cost $47.80 in stock (1). If you wish to place an order you may contact our customer care line @1800-938-4376 or visit our website www.hermanelectronics.com
The part number for the LCD display is YAMVJ805700 cost $47.80 in stock (1).
If you wish to place an order you may contact our customer care line @1800-938-4376 or visit our website www.hermanelectronics.com
Posted on Sep 19, 2010
I have an RXV850 with same problem, found there is a small light behind the flourescent display which is out.
Posted on Jan 19, 2008
The display is actually a fluorescent device. Either the display is bad or the chip that is driving it is bad. There are a few other less likely items that could also cause this. Unfortunately, the closest thing to an "easy fix" is to replace the board. This isn't even necessarily easy or cheap. I couldn't tell you much more without having the receiver here to look at.
Posted on Sep 15, 2007
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