Question about Yamaha RX-V800 Receiver

3 Answers

RX-V800 Shutdown on Function Change

Hi, the above unit is able to be switched on and appear with the screen.
However when I press the mode function button to switch between CD, Video, Tuner etc I hear the relay click and the unit switches off. I can not get it to switch back on, but can hear the relay clicking trying to do something.
If I turn the mains off, leave it for a minute or two I can switch it back on, but still have the problem above.
It was working great one day, then the next this problem.
Any ideas on what I can do?
I have read the other posts and I am hoping it is not the amp. Might not be worth repairing.
Regards Kevin.

Posted by on

  • jasonmolinar Dec 08, 2008

    I have a similar problem, except that my V800 goes into protection mode after 3 seconds. In diagnostics it says DC PRT :023, which i take it to mean that the 5V supply is off by 23% (according to the diagnostics manual).

    Thanks to Serafis' post above, i traced on the schematics where i can find the +5V and -5V are generated and rectified (Power Schematic E-68/J-64 Power 4 and Power 6). I will check those voltages. But Serafis is saying i need to replace the blown out transistors too in the amp stage which i think is Main Schematic Main 1 E-67 / J-63), but there are dozens and dozens of transistors in that schematic. Am i to check them all!?

    Can anyone help me narrow down what i need to check in the power amp schematic?

    thanks
    jason


×

3 Answers

  • Level 1:

    An expert who has achieved level 1.

    Mayor:

    An expert whose answer got voted for 2 times.

  • Contributor
  • 1 Answer

If you can get it to turn on, you can check the problem by holding down the A/B/C/D/E and Right Preset buttons (on the amp not the remote) while turning it on (pressing Standby). This enters diagnostic mode and displays a message. If it says NO PROTECT then the protection circuits have not been triggered (see below).

If it won't turn on at all, try unplugging it and leaving it for a few days to let all the capacitors discharge. You often only get "one hit", so turn iton in diagnostic mode first.

If the dignostic message says "DC PRT nnnn" then one or more amplifier output stages have DC voltage and you will need to identify which one(s) and replace the blown output transistors and any other affected components. They aren't all that expensive, but dismantling this model is a bit of a struggle! However, if it turns on and stays on until you press a button, then the amp output stages may well be OK.

In which case, it is more likely that the microprocessor is detecting a voltage or current anomaly (PS PRT :nnnn or I PROTECT).

I had the same problem and, after replacing all components on the three main power boards, the problem went away until I reassembled it all, then it suddenly started again.

I now think this is possibly a grounding problem. Many of the boards are grounded via the chassis, and after some years use a grounding /chassis screw may get loose or oxidised causing the problem.

I dismantled the amp and soldered a length of hookup wire from a grounding point on each board to a grounding point on the next, so that all of the main boards' grounds are directly connected back to the power supplies grounds. I didn't worry about the front panel boards.

Also replace the 0.047F 5.5V memory backup button capacitor near the top of the input / microporocessor main board (second board from right) as this is prone to leakage, and check / clean any leaked electrolyte from this board. Icouldn't get a 0.047F capacitor so I used a 0.1F 5.5V one.

So far (touch wood) this has worked and I am running the amp as my main receiver for a while to make sure it's fixed the problem.

Hope this helps someone.

Serafis.

Posted on Nov 16, 2008

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 2 Answers

The problem is a cold solder on the front panel. Yes replacing it does fix the issue. But just resoldering the front panel will be good. I have done 2 now and both worked. Also check and or replace C633 it is a known leaky cap. It is for memory.

Posted on Oct 13, 2009

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

Change the front panel board ant it will work

Posted on Nov 02, 2008

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
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.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

What's your problem?powerprotection mode unlock


If the protect function works and causes hindrance to trouble shoot, cancel the protection function as described below, and it will be possible to enter the self-diagnostic function mode. (The protection functions other than the excess current dtect function will be disabled.)

While pressing the "Tone Control" and "Info" keys, press the "Power" key to turn on the power and keep pressing those 2 keys for 3 seconds longer.

The seld-diagnostic function mode is activated with the protection functions disabled.

In this mode, the "Sleep" segment of the Flourescent Display flashes to indicate that the mode is self-diagnostic function mode with the protection functions disabled.

Caution!!!! Usiong this product with the protection function disabled may cause further damage to your unit, so use special care when using this mode.

Apr 18, 2012 | Yamaha RX-V671 7 Channel AV Receiver -...

1 Answer

I have a Yamaha RX V665 and I am unable to change the volume


The volume keys should be working by default, but you may have volume punch through turned on (meaning the remote is sending signals for TV or CABLE volume function no matter what mode you are actually on). To unlock volume control for AUX mode, do the following:
1. Press and release AUX
2. Press and hold SETUP until the remote blinks twice
3. Type 993
4. Press and release VOL-
The remote should blink four times to confirm unlock.

Jun 07, 2010 | Yamaha RX-V663 Receiver

1 Answer

Yamaha RX-V800 shuts down when any control button is pressed


What if you DON'T use the remote? Does it shut down when just using it?

If SO, you have a bigger problem.

If NOT, it sounds like the remote is hosed - sending a code to shut off.

Do you have another remote of any brand that you could set to do something simple, like change volume? Don't train it from the original, though, or it would do the same thing.

Feb 13, 2010 | Yamaha RX-V800 Receiver

1 Answer

Reciever shuts down by itself


Hi, i have similar/same problem, on initial power on, you have after 3 -4 secs an audible click from inside and all is good... if you then try to change inputs either via front panel and or remote, the unit switches off. if you change input prior to audible click, ie within 2-3 secs of power on , all is good and amp works fine, until you change input etc...very painful fault.. i thought it is sensing /checking the speaker outputs and detecting short etc ,so powering off to protect.. but then just my thought, i suspect something else, if anyone has the fix and can repair , please let me know.

Dec 24, 2009 | Yamaha RX-V800 Receiver

1 Answer

Rx-v800, have a problem when i swtich the input mode, it will turn off. after leave it for few months, now no problem but not sound.


Test an audio source like "DVD" connected to the "Direct" input with left,center,right,rear,andsub input. put the receiver in "Direct mode" if you get audio, the main DSP chip is bad, get an estimate first since it can only be verified by bench testing the unit. It's not a cheap repair 400-500 range. Most new Yamaha receiver's in the modest range run 500-800- new. Hope this helps

Nov 08, 2009 | Yamaha RX-V800 Receiver

1 Answer

Yamaha RX V800 w/ iTunes Airport Express


thats cause your patch cable is mono get a stereo 3 ring connector.

Apr 01, 2008 | Yamaha RX-V800 Receiver

1 Answer

Yamaha rx-v800 remote control's damaged


it can be accessed via the main unit controls but you need to go through your manuals. Maybe you can get your remote repaired still... maybe not badly damaged caused by corrosion.

redrivera0314@yahoo.com

Feb 04, 2008 | Yamaha RX-V800 Receiver

1 Answer

Problem in yamaha rx v800


Hello!!! Are you electronic technician? You should see the transistors Q22A, Q22C, Q19C e Q19A and its drivers on Main Board. All the best, Rasgador

Aug 03, 2007 | Yamaha RX-V800 Receiver

Not finding what you are looking for?
Yamaha RX-V800 Receiver Logo

331 people viewed this question

Ask a Question

Usually answered in minutes!

Top Yamaha Audio Players & Recorders Experts

 Grubhead
Grubhead

Level 3 Expert

4678 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17129 Answers

The Knight
The Knight

Level 3 Expert

69845 Answers

Are you a Yamaha Audio Player and Recorder Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...