It stop working without any warning !

Guy 13 · « **Reply #40 on:** 18 Nov 2013, 01:15 pm »

Quote from: HAL on 18 Nov 2013, 01:09 pm

Guy,
If the amp is not under warranty at this point here is something they could try.

From the pictures, the white compound under the PC Board is most likely heatsink compound, since it is the output stage of the amp. You can get small tubes of it from Radio Shack from the online store to reinstall the board after repair. It is not a glue and the seal can be broken easily by carefully moving the board. The screws that hold the output transistors to the plate would need to be removed first before removing the board.

Most likely problem is on the output stage board as the preamp board picture looks fine. See if you can find any overheated or burned components on that board. If so the repair folks could start working on that. The repair would be easier if you can get schematics for the amp for the techs.

Just some thoughts.

Good luck.

Hi HAL: and all Audio Circle members.
First:
The amplifier is not under warranty (Bought it several year ago) and
Second: It's been discountinued by Danny a long time ago.
I will take out the power PCB as you suggested and see what I can see and find.
Then I might bring it back to the repair man.
Thanks for the suggestions and advice.

Guy 13

kp93300 · « **Reply #41 on:** 19 Nov 2013, 01:26 am »

thanks Guy13 and Hal for the useful info.
the board is rather simple and should not be too difficult to repair.
Is it using conventional Ei transformer that looks rather small for the rating..

I have requested for the schematic a while ago but have no success.
Danny, what is the name of the manufacturer ? I can write directly to the manufacturer to ask for the schematic..

kp93300

Guy 13 · « **Reply #42 on:** 19 Nov 2013, 02:19 am »

Quote from: kp93300 on 19 Nov 2013, 01:26 am

thanks Guy13 and Hal for the useful info.
the board is rather simple and should not be too difficult to repair.
Is it using conventional Ei transformer that looks rather small for the rating..

I have requested for the schematic a while ago but have no success.
Danny, what is the name of the manufacturer ? I can write directly to the manufacturer to ask for the schematic..

kp93300

Hi kp93300 and all Audio Circle members.
Danny should not object since you does not sell them anymore
and therefore, we are not by-passing him and making him loose sales.
At 129 USD/each (That's what I paid a few years back)
I did not expect to see a super big power transformer.
Always cut corners to get the lowest price possible.
I think the Yung is a very good choice,
minds you Kiega Made in Taiwan look good but more expensive,
but better, but more expensive, but better...
Guy 13 STOP... You get the idea.

Guy 13

kp93300 · « **Reply #43 on:** 2 Jan 2014, 08:13 am »

Hi Guy13,
What is the outcome of the amp repair? manage to find the culprit ?

I visit Hanoi and Halong bay a few weeks ago .Halong bay is really nice !!!

cheers and Happy new year

kp93300

Guy 13 · « **Reply #44 on:** 2 Jan 2014, 10:31 am »

Quote from: kp93300 on 2 Jan 2014, 08:13 am

Hi Guy13,
What is the outcome of the amp repair? manage to find the culprit ?

I visit Hanoi and Halong bay a few weeks ago .Halong bay is really nice !!!

cheers and Happy new year

kp93300

Hi kp98300 and all Audio Circle members.
I've just checked last week with the technician
and he is still scratching his head trying to find the problem.
So, you were in Vietnam and you did not pay me a visit.
Shame on you...

Yes, Halong bay is a very nice place to visit,
it's almost a must when you come to Vietnam.
However, you don't know between Hanoi and Saigon which one is better,
well, I will tell you since I've been to both places.
Ho Chi minh City (Saigon) is the number one place as the Vietnamese say.
Happy New Year to you too and lots of health for the years to come.

Guy 13

Guy 13 · « **Reply #45 on:** 6 Jan 2014, 12:29 pm »

Hi all Audio Circle members.
At last, at long, long last...
Finally, my GR Research SA-1 is repaired, well,
that's what the technician said.
I brought it home, made all the connections, well,
not that many and turn on the switch and,
and, and... Fxxxk nothing.
Not a single bass note coming out of it.
I took a long and deep breath and re-checked all my connections,
then try again, still complete silence,
you could hear a fly flying and as a bonus for the same price,
you could hear me mumbling: Grrrrrrr.
Put back the dead weight in a bag
and sent it back to the techinician.
I did not do it myself, because, I would have kill the guy...
Double Grrrr....
I will see what he has to say.
After 18 years in Vietnam, am I surprised that something like that
as happened?
No, not at all.

Guy 13

mlundy57 · « **Reply #46 on:** 6 Jan 2014, 05:32 pm »

Bummer

Seems like it is hard to get good work of any kind done anywhere now days. My neighbor just did a bathroom remodel and said he wouldn't recommend any of the people who worked on it. I'll not even begin to go into what I think of the company that replaced my driveway.

On the bright side, at least you have a backup

Mike

bdp24 · « **Reply #47 on:** 7 Jan 2014, 03:19 am »

Same thing in the automotive world. I've been customizing my Tahoe, and not one of the things I've had done was completed to my satisfaction. Apparently the days of skilled artisans and craftsmen who take pride in their work has passed. In the lyrics of the great Poni-Tails' song, Born Too Late.

Guy 13 · « **Reply #48 on:** 7 Jan 2014, 03:23 am »

Quote from: mlundy57 on 6 Jan 2014, 05:32 pm

Bummer

Seems like it is hard to get good work of any kind done anywhere now days. My neighbor just did a bathroom remodel and said he wouldn't recommend any of the people who worked on it. I'll not even begin to go into what I think of the company that replaced my driveway.

On the bright side, at least you have a backup

Mike

Hi Mike and all Audio Circle members.
Yes, the not bright, but I call it dim side is that I have back up.
I anxious to see what the Vietnamese technician will say?
However, I don't think he will be able to repair it.

Guy 13

Guy 13 · « **Reply #49 on:** 7 Jan 2014, 03:25 am »

Quote from: bdp24 on 7 Jan 2014, 03:19 am

Same thing in the automotive world. I've been customizing my Tahoe, and not one of the things I've had done was completed to my satisfaction. Apparently the days of skilled artisans and craftsmen who take pride in their work has passed. In the lyrics of Sandy Posey, Born Too Late.

Hi bdp and all Audio Circle members.
No more pride in their work, a gree with that,
today it's as much money as possible in the pocket.
I will soon be 66 and the good ols days are long time gone.

Guy 13

Guy 13 · « **Reply #50 on:** 29 Jan 2014, 07:23 am »

Hi all Audio Circle members.
I could write a book on my adventures in Vietnam,
especially when it's about repairs of any thing that's broken,
defective or whatever...
When my GR Research SA-1 plate amplifier was brought back to me, I've tried it, but it did not work, so, I brought it back to the technician and one week later, he call me to go to his shop to see with my own eyes that it was working, at his shop.
When I got there, he plugged everything and it start working, I asked him what was the problem, but he did not want to tell me, but then, right in front of both of us, I even had a witness, it stop acting erratically, he tried to fix it in front of me, but could not, so, I went back home and the next day, he brought it back and wanted money. The hell with extra money I told him, I already paid and it did not worked. So I did not pay and when I got home, it was working fine.
End of this long, sad, frustrating story.
Next week, our showroom will be closed all week because of the (Tet) Vietnamese Lunar New Year and I will try to build two OB Dipole sub-woofers, with the two plate amplifier (One of which is the famous defective one) and the four drivers.
I have the wood and I have a jigsaw...
I told you, I should write a book.
18 years here, I have a lot to tell.

Guy 13