Yamaha RX-V800 wont turn on - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 15th June 2008, 09:57 AM   #1
serafis is offline serafis  New Zealand
diyAudio Member
 
Join Date: Jun 2008
Default Yamaha RX-V800 wont turn on

Hi, I'm new to this forum and wondered if there is anyone here who might be able to help me. I have a Yamaha RX-V800 5.1 receiver that won't power on. When I press the power button, the standby relay just clicks but nothing else happens.

Occasionally it did turn on, and I was able to ascertain that there is no DC across output stages, and the diagnostics do not report protection mode.

The standby relay is working, and I have replaced the RAM backup capacitor and most of the components in the standby power supply. I've tried bypassing the relay too, and while the main power supply then gives out the correct voltages, still no action.

It appears that for some reason the power detection circuit is not working, and so is not latching the relay or letting the rest of the circuitry power up.

I've searched this and other forums, and tried most of the troubleshooting suggested.

Some of the voltages on the mainboard are suspect (but I don't know whether theyre measured with it on or in standby!), and I'm now beginning to suspect the microprocessor, but before I chuck it out, wondered if anyone else had had similar problems and perhaps knew where to begin looking.

Thanks,

Serafis.
  Reply With Quote
Old 27th June 2008, 08:23 AM   #2
GAgola is offline GAgola  Kenya
diyAudio Member
 
Join Date: May 2006
Hi,

Did you ever get any help with your unit?

Is there a separate thread dedicated to Amps that switch on and get stuck in the "standby" mode (there ought to be!)

I am having a problem with a TEAC AG-5D that clicks on directly into standby, with the front panel display off. Pressing the standby button briefly powers up the display, which stays on for two, three, maybe five seconds before going off and the unit clicking right back to standby.

During the 2,3, 5 seconds the display is on, all (most?) front panel buttons operate as they would normally. Resetting to factory defaults doesnt seem to help much...

Agola
  Reply With Quote
Old 27th June 2008, 01:19 PM   #3
serafis is offline serafis  New Zealand
diyAudio Member
 
Join Date: Jun 2008
No, I didn't get any replies. So it's in the cupboard now and I'm on to the next project. I'll use some of the bits for spares one day I expect. Hope you get yours fixed though.

Good luck.
  Reply With Quote
Old 28th June 2008, 07:15 AM   #4
diyAudio Member
 
east electronics's Avatar
 
Join Date: Jan 2006
Location: Athens GREECE
Default come on guys

you post a question like that and expect answers ??????

ok i will give you a few

one of the 5.1 outs is gone and protection is activated
secondary psu fault /protection activated
logical fault ( any reason ) protection activated
burned speakers or shorted protection activated ....

and a few million others

in a few words it could be a million things

and also if you are lloking for a fast food solution that will say " go to board B and replace R126 and Q 123 IT WILL NOT COME FROM THIS FORUM !!!!

get a schematic i f you can read it and run a basic test about shorts and voltage ....this will get you somewhere ..... if you can not do that then your one and only option is a yamaha service shop
__________________
SERVICE ΕΝΙΣΧΥΤΩΝ ΚΑΙ ΙΑΠΩΝΙΚΩΝ ΜΗΧΑΝΗΜΑΤΩΝ ΗΧΟΥ www.eastelectronics.gr
  Reply With Quote
Old 28th June 2008, 01:16 PM   #5
yustech is offline yustech  Malaysia
diyAudio Member
 
Join Date: Jun 2008
Location: Kota Damansara
Send a message via Yahoo to yustech
1 million% agreed.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
H|H Audio V800 Amplifier Information joetama Solid State 45 12th January 2013 04:35 PM
Wanted: H&H MosFet V800 Power Amp SkipperSims Parts 4 8th November 2008 12:40 PM
wont turn on IMPALAMAN1 Car Audio 17 1st February 2006 03:53 PM
wont turn on 2, linear power 4753 iq. IMPALAMAN1 Car Audio 7 4th November 2005 06:12 AM


New To Site? Need Help?

All times are GMT. The time now is 03:57 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2