PL-700 OTW

VSAT88

VSAT88

Veteran and General Yakker
Joined
Sep 7, 2017
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Phenix City Alabama
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Like my BlueTooth ?
Heading to Suwanee Ga. In just a few to pick up a nice PL 700. Pictures to come. I am excited as hell I ain't gonna lie. I have been looking for one for a very long time that was affordable. $380.00 working in great shape.
[h=2]Hot Damn ![/h]
 
Congratulations. That is a good price. They don't seem to come cheap anymore. I've watched non working go for way too much money, but that's the way it seems to be.
 
Here we go.

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You need to drive back over there and give the guy some more money. One just sold on Ebay for $545.00 yesterday.I put money in my ppal acct. to buy it & thought about it too long. I've seen them go for $1,200.00 just in my short time here. I bought a swell 700b from Lee, but now I wan't at least one of each model amp.
What a great start on your new listening room your going to add on soon. 700 watts needs some room & worthy speakers too!
 
I always liked the look of the original 700, congrats brother :headbang:
 
God thanks Northwinds. I had started to feel like I had made a mistake in buying the PL 700 instead of a 700b because I see now that these meters will not fit a new face plate..
 
Bradock, there you go reading my mind again. Yes, I do need a bigger listening room. The one I have is so small its not even funny. So guys, where do I go from here. I checked and set DC offset only the left channel needed much adjusting. I have not checked bias or hooked any test speakers up. I have not checked bias because I cannot read the schematic I have for the PL 700. I have tried a few copy's I downloaded from a few sites but cannot hardly read either one and therefore I am not 100% sure what two resistors are R 47 and R 48. Nothing has been touched on this unit as far as I can see from day one. All the OPT are factory 909's. Here are a few images from today after I went in and poked around. It looks like I screwed myself by not finding a B unit as well. These meters are completely different than the B and therefore will never fit in a new face plate...

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Found the correct resistors to read across but the adjustments have been glued I would guess from the factory. What to do here ? Go ahead and get the glue loose anyway right ? One (left side) is sitting around .450 the other around .115
 
There are 2 variable resistors for each channel. Read the manual to get a clear idea how todoit...
 
Thats for the offset, bias is another one...be sure to get a manual for the PL0171 pcb.....I'm not home or us would post the procedure andsdchematic .....Perhaps someone else could,??
 
Broke the glue loose and I am adjusting R 36 (VR-POT) for Bias. I cannot get the bias on the left chan above .131
The right channel will adjust. I have it at .350
 
Looks like you made a great find. Good luck with the new toy.
 
VSAT88 said:
Yes. Turned the pot all the way left and adjusted R 17 . Then turned the pot all the way right and adjusted R 7 on both channels. Both are very close to 0 Mv on a 200 mV scale.
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Ok, justcheckin bud....the bias trannt is on theboard. On the channel that won't adjust, hold the bias trannywith your fingers and see if it changes as you warm it up..
 
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