Title: Tourbus help
Post by: geekmacdaddy on January 04, 2023, 07:14:11 PM
Post by: geekmacdaddy on January 04, 2023, 07:14:11 PM
Hey folks,
I installed C35 (100uf) backwards and it blew up. Replaced it, and all voltages seem ok (I think) but not getting any output from pin1 on IC1, or IC 2, pin6 and 7 and, usually when you plug the pedal in, you get a flash from the "overdrive" LED, but now, nothing. Also replace C36 and C37...same results.
Thanks!
I installed C35 (100uf) backwards and it blew up. Replaced it, and all voltages seem ok (I think) but not getting any output from pin1 on IC1, or IC 2, pin6 and 7 and, usually when you plug the pedal in, you get a flash from the "overdrive" LED, but now, nothing. Also replace C36 and C37...same results.
Thanks!
Title: Re: Tourbus help
Post by: geekmacdaddy on January 04, 2023, 07:41:59 PM
Post by: geekmacdaddy on January 04, 2023, 07:41:59 PM
I probably blew out the LED. Would that do it?
Title: Re: Tourbus help
Post by: gordo on January 04, 2023, 10:52:38 PM
Post by: gordo on January 04, 2023, 10:52:38 PM
So the rest of the pedal is OK, just the overload LED isn't working? I'd suspect the transistor but you should be able to check LED function with a battery (or supply) and a 4k7 resistor to see if it lights up.
Title: Re: Tourbus help
Post by: geekmacdaddy on January 04, 2023, 11:13:35 PM
Post by: geekmacdaddy on January 04, 2023, 11:13:35 PM
Quote from: gordo on January 04, 2023, 10:52:38 PMWell yes to the rest of the pedal, sans any output on pin 1 of IC1 or 6 and 7 on IC2...I changed the LED...still not getting juice. Thanks for the help :)
So the rest of the pedal is OK, just the overload LED isn't working? I'd suspect the transistor but you should be able to check LED function with a battery (or supply) and a 4k7 resistor to see if it lights up.
Title: Re: Tourbus help
Post by: gordo on January 05, 2023, 02:18:28 AM
Post by: gordo on January 05, 2023, 02:18:28 AM
Damn, I did read the pin 1 bit and totally blew thru it. What chips have you replaced?
Title: Re: Tourbus help
Post by: geekmacdaddy on January 05, 2023, 07:53:10 AM
Post by: geekmacdaddy on January 05, 2023, 07:53:10 AM
Quote from: gordo on January 05, 2023, 02:18:28 AMAll but 2 of the opamps (I've never blown one of those). My readings were all good.
Damn, I did read the pin 1 bit and totally blew thru it. What chips have you replaced?
Title: Re: Tourbus help
Post by: jimilee on January 05, 2023, 07:54:02 PM
Post by: jimilee on January 05, 2023, 07:54:02 PM
Quote from: geekmacdaddy on January 05, 2023, 07:53:10 AMThis is just a stab in the dark, but is it safe to say you remembered to use the bi-polar cap in the right spot? I screwed that up last year.Quote from: gordo on January 05, 2023, 02:18:28 AMAll but 2 of the opamps (I've never blown one of those). My readings were all good.
Damn, I did read the pin 1 bit and totally blew thru it. What chips have you replaced?
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Title: Re: Tourbus help
Post by: geekmacdaddy on January 05, 2023, 08:57:54 PM
Post by: geekmacdaddy on January 05, 2023, 08:57:54 PM
Quote from: jimilee on January 05, 2023, 07:54:02 PMQuote from: geekmacdaddy on January 05, 2023, 07:53:10 AMThis is just a stab in the dark, but is it safe to say you remembered to use the bi-polar cap in the right spot? I screwed that up last year.Quote from: gordo on January 05, 2023, 02:18:28 AMAll but 2 of the opamps (I've never blown one of those). My readings were all good.
Damn, I did read the pin 1 bit and totally blew thru it. What chips have you replaced?
;D I did, thanks.
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Title: Re: Tourbus help
Post by: jimilee on January 05, 2023, 09:04:21 PM
Post by: jimilee on January 05, 2023, 09:04:21 PM
Quote from: geekmacdaddy on January 05, 2023, 08:57:54 PMYou broke it.Quote from: jimilee on January 05, 2023, 07:54:02 PMQuote from: geekmacdaddy on January 05, 2023, 07:53:10 AMThis is just a stab in the dark, but is it safe to say you remembered to use the bi-polar cap in the right spot? I screwed that up last year.Quote from: gordo on January 05, 2023, 02:18:28 AMAll but 2 of the opamps (I've never blown one of those). My readings were all good.
Damn, I did read the pin 1 bit and totally blew thru it. What chips have you replaced?
;D I did, thanks.
Sent from my iPhone using Tapatalk
Sent from my iPhone using Tapatalk
Title: Re: Tourbus help
Post by: geekmacdaddy on January 05, 2023, 09:26:23 PM
Post by: geekmacdaddy on January 05, 2023, 09:26:23 PM
Quote from: jimilee on January 05, 2023, 09:04:21 PMHahahahahhaaaaa! I did! Thank you :D :D ;D I needed that!Quote from: geekmacdaddy on January 05, 2023, 08:57:54 PMYou broke it.Quote from: jimilee on January 05, 2023, 07:54:02 PMQuote from: geekmacdaddy on January 05, 2023, 07:53:10 AMThis is just a stab in the dark, but is it safe to say you remembered to use the bi-polar cap in the right spot? I screwed that up last year.Quote from: gordo on January 05, 2023, 02:18:28 AMAll but 2 of the opamps (I've never blown one of those). My readings were all good.
Damn, I did read the pin 1 bit and totally blew thru it. What chips have you replaced?
;D I did, thanks.
Sent from my iPhone using Tapatalk
Sent from my iPhone using Tapatalk