The Repair Bench: Carvin SX200 Guitar Amplifier

6 Comments - Please Use the Form Below to Join the Conversation!

anonymous
23:43 Wednesday.23 September 2015

[…] The Repair Bench: Carvin SX200 Guitar Amplifier … – I appreciate your post here. I had a similar problem in an SX-AMP that came to me. Channel A would not work. When the distortion and volume were turned up all the way … […]

RockinJay
04:42 Thursday.20 August 2015
I appreciate your post here. I had a similar problem in an SX-AMP that came to me. Channel A would not work. When the distortion and volume were turned up all the way, the amp was faint.

I read your post, knowing nothing about Carvin amps, I needed the schematic you provided. This problem was actually the same op-amp A1, but in this case, the output of the first stage, the input buffer, was shorted to 15 volts, the opposite rail your op-amp outputted.

I changed the op-amp with the common replacement op-amp LM1458.

Now the amp screams, thanks for your insight, it saved me hours of time.

RockinJay

Len
23:04 Tuesday.27 June 2017
thanks for this. my mid-90’s SX200 (all tube, carpet cover) has the same symptoms described.

No way I can do this. I’ll need a recommendation for a good repair guy in the Detroit burbs.

John L. Murphy
08:28 Thursday.31 August 2017
I originally designed the SX preamp to employ sockets on all op amps. My preferred op amp was the NE5532, especially for the first stage preamps.

Cheers!
John

John Simms
02:02 Friday.17 October 2014

Good job! I wish I had paid attention when I was in radio class at high school.

Gray
21:58 Monday.06 May 2019
I recently obtained one of these and it does have the Eminence Britsh Series speakers but I can’t seem to find out what year it is.

Would you happen to know? Ser 146004

Thanks

Comments will be visible after moderator review