I have a problem with my yahamaha amp and thought it best to share what I found.

I emailed yahmaha and their reply is included.



Hi Paul,

First off may I thank you for the info concerning the replacement for my
DSP
A2. The insurance tried to
fog me off with a £500 model until I sent them your email and explained if
anyone knows the replacement its
the people who make it.

Now onto the real reason for this email and sadly its a problem.

The problem happens is if im watching a DVD through optical and I have it
set to THX cinema both normal and
EX (triggered manually or by a flag). I dont know about co-axial as I
havent
tried it.

If I slide open the flap on the bottom of the remote and press the arrow
keys up/down left right the whole amp freezes
and by this i mean literally everything on the remote and the amp! I have
to
pull the plug out of the wall and this as you
can imagine is not good at reference levels.

As you are aware this is the method stated in your instruction manual page
32 on how to select decoders!

I have the decoder set to AUTO as on page 32 but I see no reason that upon
pressing these keys the result should be a freeze.

May I add that this problem does not occur with a PCM stereo signal input
through coaxial from my digi box. The reason being is
is I can select the different decoders as per the above method page32.

I look forward to your help with this matter and if you require anymore
info
I'll be glad to provide it.

Kind Regards
john




It is not a problem that we have been made aware of previously, best thing
to do is pop the product back to your dealer for further investigation. It
is definitely not normal operation, and needs to be investigated as soon as
possible.

Regards,
Paul Davey

Yamaha Electronics (UK) Ltd
www.yamaha-audio.co.uk

I do not find anything about this on page 32 of the RX-V2400U manual (is the ...RDS different?) located at

[Link: yamaha.com]

so I was wondering if you could locate the problematic process in the manual on the site and tell me where it is. I have a few clients with the 2400 and I always like to be able to know before their late-night phone call if yanking the power cord out of the wall is the solution of the moment!

Ernie,

I believe what he's saying that he's trying to set the decoders in the manner as mentioned on page 32 of the manual, but in doing so the the whole unit is "locking up". Nothing will work (including volume control) and the only means by which he can reset it, is by doing a "Ferranti" reset . . . cycling the power. (Don't think he meant to imply, "pulling the plug out the wall" was in the manual).


For info.

1). The RX-V2400RDS manual can be found here. (3.34Mb)

2). No idea what the "U" stands for, but "RDS" is for Radio Data System; details of which begin on page 40.

This message was edited by djy on 06/13/04 01:37.

The "U" is apparently the United States model. Page 32 has no such instructions on it. Did you look at the manual on the link I posted?

Yea thats what I meant. It completely locks. Just put it on DVD input, play a 5.1 signal, press THX on the remote, open the flap on the remote and press the cursors up down left right and hey presto it locks. Nothing will work. the only solution is to pull the plug.

I looked carefully at page 32 of the manual for the 2400RDS. It is indeed different from the instructions for the 2400U, the US model.

Have you tried following directions but NOT pushing the up and down buttons? The directions tell you to push the left and right buttons, but they do not tell you to push the up and down buttons.

You say that when you "press the arrow keys up/down left right" that you have a problem. Try following the instructions EXACTLY and just pressing the left and right buttons, that is, - and + , not up or down. Perhaps there is a problem with freezing up if you hit those buttons, but the Yamaha crew did not happen to hit those buttons in their tests so they did not find that problem.

Yamaha have made this more confusing by telling you to push buttons with symbols of a left-facing and a right-facing triangle, although the buttons are actually labeled - and + . Whenever I see a totally dumb oversight like that, I find it hard to believe that the same crew got everything else right.

What makes things even more confusing is that earlier in the manual they do refer to them as - and +.


Ernie,

Seems you picked up the same inconsistencies that I did, but considering the above is the right cursor being used?

Yes I was very confused by the manual and thats how I stumbled upon the fault. I did try the arrows as you say but they had no effect. Only the ones under the flap work.

My amp is going back today and I shall be getting a replacement.

THX certification states it should be simple and easy to operate, ha ha not in this case :-)



I just tried the buttons and it is only the up /down under the flap and not the + or -



This message was edited by john on 06/14/04 05:20.

Ive just recieved my second amp and have managed to do the same to this one. It involves using DVD rips. Original discs never trigger this fault. Using a copy try the above sequence and it should do it. then original copies will do it.



edit: ah bugger this problem is not as clear cut as I first thougth. Ive reset the amp as per yahamaha instructions and am STILL trying to recreate the fault. I got the amp monday and it wouldnt do it til thursday so maybe by tuesday it will.

still its a bloody nice amp :-)


This message was edited by john on 07/10/04 08:30.

well its did it again and now the problem is having to be passed onto Japan as yamaha uk cant replicate the problem only me.

just like to add that on prologic IIx I have no signal sent to the sub but on dts neo:6 I have a signal.

am still waiting for yamaha's reply to this.

try this:


1 press dvd on the remote to select the dvd input.

2 play 5.1 disc in thx cinema mode.

3 press source select button up (labeled button 7 in the manual page 6)

4 slide down cover (26)

5 press cursor buttons up/down left right (27)

amp should now be locked and the only way to reset it is to switch the mains off at the plug

That Yahama is a cheap piece of garbage. Get rid of it and get a quality amp from someone like HK, Marantz or Onkyo.

im begining to agree with you on that one.


am i the only person in the world who has done this to 2 of these amps??

Ive sorted the problem of no-signal sent to the sub when using any pro logic setting.

I went into basic set up and set subwoofer to yes. This is in spite of auto setup recognising
the sub and configuring it.

Strange as the manual says all that needs to be done is run auto setup. Just not the case though
is it.

Any ways I have sub woofer on all prologic settings now but it still locks ha ha