Question about Yamaha RX-V800 Receiver

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Check sp wires then it off.

Same problem I encountered to my RXV800, you were telling us that a main transistors and capacitors are need to be replaced. May I know in what section of amplifier does these transistors and caps located? Is it in the power supply section or in amplifier section? Thanks

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Posted on Jan 02, 2017

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SOURCE: Check SP wires

if you checked wire carefully in high ohm reading and confirm no internal short circuit.-please follow me:-1-disconnect all speakers cables from receiver and check if it is fine-try to connect your speakers one by one until you find the bad one.if it is still shut down you will have a problem inside receiver itself and needs service center to fix.
-it maybe speaker check it also one by one with good known cable.

Posted on Jul 16, 2008

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SOURCE: Yamaha AV Amplifier RX V530

You might have your speakers shorted. Check the wiring at the amp and speaker terminals

Posted on Sep 01, 2010

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SOURCE: Yamaha sp 900 TV and device


Thank you so much for using

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Posted on Feb 16, 2011

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3 Answers

I turn on home theater receiver and it says,"check sp wires",then it shuts off

You have some speaker wires crossed or shorted.
inspect the speaker wires for shorting (cat/dog /mouse chewed em up?).
You can also disconnect the speaker wires and plug them back in one at a time to locate the shorted one , should you be unable to determine which wire is shorted.

Mar 23, 2013 | Audio Players & Recorders

1 Answer

My yamaha receiver RX-V363 keeps shutting off and saying check SP cable

It is one ot two things, the audio output transistors or ic,s are shorted, or the speaker wires in the back of the surround sound are shorting.

Apr 08, 2012 | Yamaha RX-V363 Receiver

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Sunsui tv model dftv270 turns off by itself how do i fix is

There are several versions of this model. They all have the same problem. The problem I'm speaking of , the location numbers of bad capacitors. So I will give you values and you will need to search and replace these. Find an ESR meter to locate bad capacitors. In the vertical deflection look for 50 volts at 4.7Mf, 35 volts at 100Mfs,50 volts and 25 volts at 1 Mfs. Be sure to resolder the vertical IC and don't solder the pins together. Find the smallest electrolytic caps valued at 50 volts 1 Mfs and replace these. These are scattered through out the main board. Other small caps include the 25 volt 10 Mfs, several of these as well. You also may want to inspect the capacitors near the flyback transformer and horizontal transistor and the horizontal output transistor. You will have to seek and find the weak or bad caps here. I will tell you, the shut down is mainly a capacitor issue. Caution is required when you remove these. The circuit traces in these TVs are very delicate and you can destroy this TV in seconds.Thanks for asking me and show all hands of support!

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After I put a fuse in the player, and plug into wall, the fuse immediately blows.

Your fuse blown again because you have a short on the circuit. You may visit my link for more info.
I've suspect that you have short on rectifier diode/main filter capacitor/regulator IC/transistor. This is quite fixable.
Hope it may help you.
Thanks for using fixya.

Feb 03, 2011 | Samsung DVD-V3650 DVD Player/VCR

1 Answer

While testing vdc at the base board for the cathode wires found that the red and blue were at 4 VDC and green was at 8. Picture has mainly blue and green tints.No loose soldier joints found.

Have you measured the voltages at the collectors of the three video output transistors?. There must be a voltage over 124 to140VDC at least. All voltages at the base of that transistors should be between 2.5 to 3.75VDC according to the level of chroma signal from the chroma Ic.
You must check these voltages with a good quality digital or analogue multimeters, otherwise you will get only false values instead of the real. You just check the main voltage that goes to the video output stage, that is the high voltage comes to the crt base, from the main board. It should be more than 260VDC. Normally in all tvs this voltage is derived from the LOT. After rectifying it and filtered with a 10Mfd 350V capacitor, and given to the baseboard as the main supply to video output stage. If the smoothing capacitor [10Mfd] gets value changed, that is if it gets a low value due to age, otherwise whether it has an internal short, you won't get the above said 260VDC at the CRT base boad. At first locate this capacitor and replace it with a new one with same capacity and voltage ratings. and check all video output [ 3 of them] transitors too. Check the transistors for collector to emitter leak, not on circuit, but after take it out desoldered. Then only you will get the proper measurement of leak. Set the multimeter in MegOhms rage, and don't held the transistor by hand too. If you do so you will see some deflection in the meter due to your body resistance.
Check the capacitor first. Replace it. It is best. Check the rectifying diode that rectifies this voltage from the LOT winding. If it has a leak, you will get a low voltage at this rail.
Remember, LOT works at high frequecy. So the diode used there as retifier is a special type, fast recovery diode, and should be repaced with the same number. Never use ordinary diodes that we uses for line rectification purpose.
Remember, colector voltages at the video output transistors must be above 140VDC. Again recomends to use a good quality multimeter, as cheaper one cannot measure this voltage accurately.
Ok. Wish you all sucess.

Oct 23, 2010 | Proscan PS36125 36" TV

3 Answers

When switching panasonic tv on it goes into standby

It is for sure that your set has encountered a fault in the power section in the main board. There could be either a failure or a break in the circuit. So first of all open and check the main power board for any signs of dry soldering joints. Use a good soldering iron and a good light to probe. Solder all possible areas specially ones closer to the power resistors and drives. next check the +B voltage, trace it or disconnect from the ddrive to confirm the failure. You must use a good multimeter to check from the power section which is working and is cutting off due to a failed feedback. If not familiar do not attempt but take help. I hope you can decide and try. Good day

Jul 23, 2010 | Panasonic TX-32LX1F 32 in. LCD TV

1 Answer

I have an old Sony tv from 1992 and it's image is now compressed verticaly to less than half of original dimension. This 'half image' is distorted to center giving the impression that it's divided...

Vertical out transistors bad solder, or return linearity capacitor bad (a large capacitor, usually between 1000uf and 2200uf.) They're near where yellow and brown wires from picture tube connect to main board. They are larger transistors.

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My Hunter(Model uc7058ry) receiver is malfunctioning. When I switch the power on at the wall switch, the light comes on but flickers. The receiver also does not respond to the remote (transmitter). Is...

Happy christmas

Problem solved.

SCREW (those used to screw transistors to heat sink)

Open the uc7058r inside the fan

look for the blue wire (lamp Wire), follow it inside the main board.

Keep following the wire to the internal trace conductor in the board wich connect to a transistor (triac) (located screwed to a heat sink)

Replace this transistor with NTE5671

you will need to replace the heat sink screw with a longer one


Hope it helps

Alexis J. Correa, PE

Jan 12, 2010 | Hunter Ceiling Fan Control Switch

1 Answer

The same problem even without wires on, "check sp wires" and turns off, or doesnt turning on.. ...yamaha sucks..

Your unit took a power spike or a brown out; big dip in power then a surge. Yamaha's receivers are pretty solid when it comes to power supply's! it takes alot to zap em! If that's the case, it's about a 275 dollar repair. They will replace main transistors and caps. If you don't have a serious Home Theater Surge/Conditioner (not a power strip) get one! any receiver with today's spec's will be toast!. If you need some guidance on receiver's or surge, post a comment and I can help you out. Sorry for the bad luck!

Aug 03, 2009 | Yamaha RX-V800 Receiver

2 Answers

Check SP wires

There is an internal short that is being detected. This is probably a defective output transistor that is somewhat sensitive to heat. This should be a straightforward repair with a parts cost in the $20 range. Add in the local labor rate for the total cost.


Jul 16, 2008 | Yamaha RX-V740 Receiver

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