Mark Levinson No 27 -schematic requites

[nickbfl]

I have a problem with one channel of a ML No 27.

If someone has schematics, service manual and/or PCB layouts (note No. 27 not 27.5 as they are rather different) that they could share I would appreciate it very much.

Thank you very much.

Nick

 

[seebert]

Please include me if you have the service manual for the ML No.27 I don't have any problems but it would be very nice to have it and I'll cover all reasonable costs for copying, your time etc. by PayPal or USPS money order. Many thanks, Mike.

 

[smokingdog]

Did anyone ever track down Mark Levinson No.27 schematics?

I have exactly the same problem. One channel no longer outputting bass. Did anyone ever track down the No.27 schematics?

 

[nickbfl]

The channel was completely dead. The problem was a shorted film cap. I can't recall more than.

I do have a set of schematics that I made of this version that do have a few small errors if anyone wants them, pm me.

 

[fmjunkie]

This is an older thread, but nickbfl, do you still have those schematics? I've got a No. 27 that has a bad channel as well and they would be helpful.

 

[nickbfl]

Hi fmjunkie,

'tis here ML_27.zip

Good luck!

 

[jonstanza]

original... ML27

I hope it helps ....

best regards

 

[fmjunkie]

Hey thanks guys. Schematics for the 27 seem to be hard to come by. Hopefully, this will help.

 

[jonstanza]

always available

jon

 

[Haristar]

I have a problem with one channel of a ML No 27.
The channel is not dead but the volume is very low, if someone had the same problem, I would appreciate some tips.

Thanks

 

[jonstanza]

In defective channel. test individually for each input (+ and - XRL) if positive or negative input have a lower gain, may be the voltage amplifier (+ or -) there are anomaly. the gain must be equal for both inputs (+/- xrl)

regards

 

[Haristar]

Tanx

 

[Stereohans]

My No. 27 functions well but shows a slight harshness of high tones on higher gain levels that doesn't correspond with the descriptions of the sound to be found in Stereophile and other magazines. I suppose there are some transistors that didn't survive the years well. The zip-file of the schematics seems to have disappeared. Could you re-post it so I can restore my No. 27?

Regards, Hans

 

[cumbb]

Post 7.

But: It is a multistage-complementary-parts-pp-design. Never you will listen a clean clear tone with it;-)

 

[Stereohans]

Of course not. Any music transforms to distorted blah blah. That's the reason why I bought ML

Greetz, Hans

 

[Zaphod Beeblebrox]

Sorry to resurrect this ancient thread, but I was wondering if anyone had the schematic for the power amp stage of the No. 27? I have one on the bench which is kinda frustrating me.


Oops, forget I asked. I just saw post #7.