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Title: johnson jt50 mirage schematic
Post by: EDWARDEFFECT1 on August 12, 2010, 02:00:59 AM

does anyone know where i can get a copy of a schematic for this amp.i am getting about 86 volts on the power plug connections?120 volts at the plug.not getting any voltage on the ic v+....thanks...ed!!

Title: Re: johnson jt50 mirage schematic
Post by: EDWARDEFFECT1 on August 23, 2010, 12:22:26 AM

found the power plug wired wrong! i now have voltage going to the ics.replaced the output chip ,but haven't tested the amp yet...still wish i could find a schematic.anyone have any ideas?...thanks..ed

Title: Re: johnson jt50 mirage schematic
Post by: joecool85 on August 23, 2010, 09:05:24 AM

You'll need to contact Johnson Amplification to get the schematic.

http://www.johnson-amp.com/support.htm

Title: Re: johnson jt50 mirage schematic
Post by: EDWARDEFFECT1 on August 27, 2010, 01:35:12 AM

thanks cool!!............ed!!!

Title: Re: johnson jt50 mirage schematic
Post by: EDWARDEFFECT1 on October 30, 2010, 10:00:38 PM

got the schematic for this amp.i have analog signal coming into the cs4221-ks chip ,but no analog coming out. i just got a replacement chip for it .i will let you know how it plays out....ed!!!!

Title: Re: johnson jt50 mirage schematic
Post by: joecool85 on November 01, 2010, 07:40:29 AM

Quote from: EDWARDEFFECT1 on October 30, 2010, 10:00:38 PM
got the schematic for this amp.i have analog signal coming into the cs4221-ks chip ,but no analog coming out. i just got a replacement chip for it .i will let you know how it plays out....ed!!!!

Excellent! Thanks for keeping us posted, Ed.

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Solid State Amplifiers => The Newcomer's Forum => Topic started by: EDWARDEFFECT1 on August 12, 2010, 02:00:59 AM