Adcom GFP-750

heiney9

Make sure you have fresh batteries in the remote. It's usually weak batteries. Also with the 750 you sort of stab at the vol control, not a full press and hold. It takes some getting used to to modulate. Since it's analog and motor driven it's different than your typical digital volume control.

H9

cstmar01

I have never had an issue with the pre and the volume. I know the remote can be touchy and has to be pointed right at it but that was it, never had an issue with turning up the volume or down and never had it not power on or power off.

Was the unit fresh cold when you hooked it up? Did you leave it sit at all? Have you taken the top plate off and looked inside to see if anything is off?

cstmar01

H9 is correct as well. Don't hold down on the volume. hit the button and it should go up in steps. I usually would set my volume when I put in a CD and then fine tune it when I was back in my chair.

cstmar01

I doubt a claim would work for anything. If the box is not damaged on the outside (Which the pre was sandwhiched between stiff sytrafoam) and the unit was dropped off and accepted then I don't think a claim can be done. The pre did not move inside the box and it was the same that I got it in when I bought it from a forum member.

scottyboy76

Just got back in from dinner.

Turned it on and off several times, no probs.

Not looking to make a claim, packed well, and no obvious damage to box.

As far as volume, I found a review of the 750s, touching on the sensitivity of volume control, as well as problem of volume continuing up or down after an adjustment, and as far as weak batterys, the motor continued trying to turn the knob in my hand even after the batterys had been flicked out of remote.

I will try to link the article for general information here on cp.

The pre did sit for about 1.5 hours after arriving.thankfully with mild weather we have been having, it was not frigid or anything.

BTW, this thing is light years ahead of my old pre, and avrs i have owned, make no mistake, I am happy with the sound.

scottyboy76

Cant copy and paste the ehow post.

It basically is responding to a question, and is a general comment about customers having problems with controlling volume.

I googled adcom gfp750 volume control problems.

Hopefully it continues to behave, i love the sound it has added to our system.

heiney9

Try fresh batteries, I won't say it again. I've seen the exact same thing happen numerous times and fresh batteries cured it. It's a cheap way to rule it out.

H9

cstmar01

Scott if worse comes to worse and you don't like it I can give you your money back.

scottyboy76

Thank you chris, thats an upstanding thing to do, but at the price you let me have this for, i can afford to have it looked at by a shop if need be and still be at what most prople pay for a 750.

I also thank you for getting it to me well shipped, and in a timely manner, would do business with you again anytime.

If i had to not use the volume on the remote, it would not be the end of the world, some pres arent even made with a remote.

audiocr381ve

scottyboy76 wrote: »

Thank you chris, thats an upstanding thing to do, but at the price you let me have this for, i can afford to have it looked at by a shop if need be and still be at what most prople pay for a 750.

I also thank you for getting it to me well shipped, and in a timely manner, would do business with you again anytime.

If i had to not use the volume on the remote, it would not be the end of the world, some pres arent even made with a remote.

Have you tried fresh batteries?

heiney9

audiocr381ve wrote: »

Have you tried fresh batteries?

I was going to ask, again? But hey, if he doesn't want to try it, no skin off my back. It could very well not be the issue, but why pay to have someone look at it before doing things that cost next to nothing.

H9

scottyboy76

audiocr381ve wrote: »

Have you tried fresh batteries?

Just got in from debs pulmonary doctor appt. in atlanta.

AND GETTING MY RECAPPED TIME WINDOWS 3S, WOOOOOOHOOOOOOOO.

Yes there are fresh batterys in remote, no weirdness repeats so far, Although it can be pretty tough to make the unit volume change, its not a big deal.

Got a great price from chris on a great pre.

It did make the old **** pucker pretty hard when that volume knob was fighting me like it had a mind of its own, but between the sound quality of the pre and the fresh speaks, i cant stop smiling, the Tom Petty "Damn the torpedoes" blu ray is amazing.

And like many before me, I am now wondering what the next piece of the puzzle should be.

Systems

Have you looked at the remote closely to see if there may be some crud that is keeping the volume button from operating (up and down) properly?

I had an HK AVR years back that did the same thing.
I took the remote apart and sure enough there was some dirt and such inside.
Once cleaned I never had the problem arise again.

Just a thought.

scottyboy76

pepster wrote: »

Have you looked at the remote closely to see if there may be some crud that is keeping the volume button from operating (up and down) properly?

I had an HK AVR years back that did the same thing.
I took the remote apart and sure enough there was some dirt and such inside.
Once cleaned I never had the problem arise again.

Just a thought.

Have not, but will, makes sense.

scottyboy76

Preamp just did the runaway volume thng again twice, listening to david gilmour dvd, stabbed at volume up control as chris instructed, it just kept going, ran over, turned it down by hand, knob kept trying to go up, front power switch would not work, rear master switch turned unit off.

Flipped rear master switch back on, front power switch worked, tried turning vol. up by hand,it ran away again, front power switch again not functioning, used rear switch again, after turning unit back on, and setting volume by hand, making sure it was staying put, pushed vol. down, knob continued down, fought against me trying to turn it up, powered off and on, volume is now holding steady for now.

Talked to gordon at audiolab earlier for ball park price on tracking down and possible repair, he said app. 200 bucks, chris offered to take unit back, dont really want to give up on it, I like the sound, plus i would be out 60 bucks shipping both ways if i returned it, but 200 bucks is not in the budget, seriously afraid to use it, especially with newly recapped speaks, i just dont know.

will be opening unit to see if there is something obvious as chris suggested.

heiney9

Sounds like you have an issue, unless you have another RF signal that's interfering (pretty unlikely). If it's fighting you and the front panel won't allow power down then there must be a logic issue.

Good luck

H9

cstmar01

Scott pm me about it. If it needs to get looked at we can go from therr

scottyboy76

About the only thing i would know to look for is a dark spot, loose ribbon connector or such, nothing obvious, looks clean

scottyboy76

pming chris

Toolfan66

Take the remote apart and clean it out with a can of air, make sure all looks good and functions put it back together and go from there, it's the remote not the pre...

WagnerRC

Was this shipped fedex or ups. I am not wanting any problems with the 70 lb amp shipping. Thanks

scottyboy76

Toolfan66 wrote: »

Take the remote apart and clean it out with a can of air, make sure all looks good and functions put it back together and go from there, it's the remote not the pre...

Will do that, hoping your right, a harmony remote purchase would be acceptable, to say the least.

Only prob. is this had the same behaviors with batterys out of remote.

audiocr381ve

scottyboy76 wrote: »

Will do that, hoping your right, a harmony remote purchase would be acceptable, to say the least.

Only prob. is this had the same behaviors with batterys out of remote.

Well, I guess that rules out the remote as the cause.

FTGV

I assume there will be a couple of large multi pin IC's .If these are socketed as opposed to being soldered directly to the circuit board you might double check that the pins are seated tightly into the socket(s).

cstmar01

If it needs to be fixed ill pay foe it to be fixed and will file a claim with ups for the amount of the service cost. If you intend to take it to a certain person I would like their info and to just pay them directly.

Toolfan66

I had the same problem when I got my 750 with the remote but it didn't do it when I used my remote from my Adcom 750 CD player, so I took the remote apart that came from my 750 preamp and cleaned it up and have not had a problem since..

Must be something different but mine did the same thing I had to dive and turn the volume knob down but it was an easy fix..

cstmar01

Yeah I never had the issue before and never changed the batteries. Well regardless ill pay to get it fixed if it needs it but ups will not hear the end of it regarding the claim if they do not honor it. They have always been good for me while fedex was the bad one.