#1
this is a zendrive that Tim (toyroom) built for me, sounded great until tonight. i plugged another OD and the zendrive decided to die.

i have tried cables, amps, isolated from the group.

its true bypass. it still lights up but all i hear are scratches with the pedal and amp dimed.

i can get pics, but not great, i checked the jacks and switch, etc
WTLT 2014 GG&A

Quote by andersondb7
alright "king of the guitar forum"


Quote by trashedlostfdup
nope i am "GOD of the guitar forum" i think that fits me better.


Quote by andersondb7
youre just being a jerk man.



****** NEW NEW NEW!
2017-07-07 2017-07-07 Update and a Chat On Noise Constraints *** NEW FRIDAY 7/7
2017-04-13 RUN AWAY from COMPUTERS!!! TCE? RANT ALERT!!!
2017-03-02 - Guitar Philosophy 1001- Be Prepared For the Situation (Thursday 2017-03-02)
2017-02-21 How to Hot-Rod the Hell of your Stratocaster for $50! (Tuesday 2017-2-21)
Resentments and Rambling from a Guitar Junkie
---> http://trashedengineering.blogspot.com/
Last edited by trashedlostfdup at Dec 17, 2014,
#2
Quote by trashedlostfdup
i plugged another OD and the zendrive decided to not die.

Which pedal did decide to die then? :P
Quote by lolmnt
I love to have my vag pounded by guys who make lame threads on the internet!


Quote by snipelfritz
This thread topic is gold. I've been on this website for 8 years and I've never come up with anything like this. So yeah. Great job TS[457undead].
#3
Quote by 457undead
Which pedal did decide to die then? :P


zendrive
WTLT 2014 GG&A

Quote by andersondb7
alright "king of the guitar forum"


Quote by trashedlostfdup
nope i am "GOD of the guitar forum" i think that fits me better.


Quote by andersondb7
youre just being a jerk man.



****** NEW NEW NEW!
2017-07-07 2017-07-07 Update and a Chat On Noise Constraints *** NEW FRIDAY 7/7
2017-04-13 RUN AWAY from COMPUTERS!!! TCE? RANT ALERT!!!
2017-03-02 - Guitar Philosophy 1001- Be Prepared For the Situation (Thursday 2017-03-02)
2017-02-21 How to Hot-Rod the Hell of your Stratocaster for $50! (Tuesday 2017-2-21)
Resentments and Rambling from a Guitar Junkie
---> http://trashedengineering.blogspot.com/
#5
Quote by forsaknazrael
Is the opamp socketed? If so, totes could send you another opamp to try.




those were the guts for the NPD. it doesn't look differnt, nothing black or melted.
WTLT 2014 GG&A

Quote by andersondb7
alright "king of the guitar forum"


Quote by trashedlostfdup
nope i am "GOD of the guitar forum" i think that fits me better.


Quote by andersondb7
youre just being a jerk man.



****** NEW NEW NEW!
2017-07-07 2017-07-07 Update and a Chat On Noise Constraints *** NEW FRIDAY 7/7
2017-04-13 RUN AWAY from COMPUTERS!!! TCE? RANT ALERT!!!
2017-03-02 - Guitar Philosophy 1001- Be Prepared For the Situation (Thursday 2017-03-02)
2017-02-21 How to Hot-Rod the Hell of your Stratocaster for $50! (Tuesday 2017-2-21)
Resentments and Rambling from a Guitar Junkie
---> http://trashedengineering.blogspot.com/
#7
Quote by CodeMonk
Talk to Tim you dumbass (sorry i'm drunk)


i think that standard protocol for sitting on UG at night.

_________


it did have a socketed op amp. i pulled it out without much force.
WTLT 2014 GG&A

Quote by andersondb7
alright "king of the guitar forum"


Quote by trashedlostfdup
nope i am "GOD of the guitar forum" i think that fits me better.


Quote by andersondb7
youre just being a jerk man.



****** NEW NEW NEW!
2017-07-07 2017-07-07 Update and a Chat On Noise Constraints *** NEW FRIDAY 7/7
2017-04-13 RUN AWAY from COMPUTERS!!! TCE? RANT ALERT!!!
2017-03-02 - Guitar Philosophy 1001- Be Prepared For the Situation (Thursday 2017-03-02)
2017-02-21 How to Hot-Rod the Hell of your Stratocaster for $50! (Tuesday 2017-2-21)
Resentments and Rambling from a Guitar Junkie
---> http://trashedengineering.blogspot.com/
#8
Diagnosing faults isn't exactly easy over the internet. However, if it happened while you were plugging something in, I'd be wary of static damage to the op amp, especially if it's a FET input (TL072, TLC2272, etc) op amp. Try swapping it with something suitable. If that doesn't fix it, read the voltages at each pin and post them.

This is assuming you've already checked for easy stuff like continuity between board/switch.
E-peen:
Rhodes Gemini
Fryette Ultra Lead
Peavey 6505
THD Flexi 50

Gibson R0 Prototype
EBMM JP13 Rosewood
Fender CS Mary Kaye

WTLT

(512) Audio Engineering - Custom Pedal Builds, Mods and Repairs
#10
Quote by The_Blode
Time to rewrite your Christmas list.

#1 + New pedal
#2 + Brand new copy of Queens of the Stone Age - Songs for the Deaf
#3 + Old skool pair of Nike sneakers



#1: I'm in the process of building/producing one that will blow your mind. Thats where the laser printer comes in. (I need the laser printer to make PCB's)
#2: Already have a copy.
#3: I bought new shoes today already from Target. Fuck Nike.
Last edited by CodeMonk at Dec 17, 2014,
#11
Quote by The_Blode
I'm genuinely thrilled with this response! How long should I wait for?

Please call me after 5PM to discuss if you wish.


If you are referring to #1, check your Pms.
#12
Quote by mmolteratx
Diagnosing faults isn't exactly easy over the internet. However, if it happened while you were plugging something in, I'd be wary of static damage to the op amp, especially if it's a FET input (TL072, TLC2272, etc) op amp. Try swapping it with something suitable. If that doesn't fix it, read the voltages at each pin and post them.

This is assuming you've already checked for easy stuff like continuity between board/switch.

This was my thought. Post voltages, but baring anything useful that, totes socketed. PM me, I'll mail you something.
Last edited by forsaknazrael at Dec 17, 2014,
#13
Quote by forsaknazrael
This was my thought. Post voltages, but baring anything useful that, totes socketed. PM me, I'll mail you something.


thats the kinda guy i am.

but yah voltages pls.
mojostompboxes.com
#14
Quote by greeny23
thats the kinda guy i am.

but yah voltages pls.


voltage on what??? i ran around with DVOM for contnuity, but i didn't see what was wrong.

also i pulled the chip. i am assuming that its gotta go back in?
WTLT 2014 GG&A

Quote by andersondb7
alright "king of the guitar forum"


Quote by trashedlostfdup
nope i am "GOD of the guitar forum" i think that fits me better.


Quote by andersondb7
youre just being a jerk man.



****** NEW NEW NEW!
2017-07-07 2017-07-07 Update and a Chat On Noise Constraints *** NEW FRIDAY 7/7
2017-04-13 RUN AWAY from COMPUTERS!!! TCE? RANT ALERT!!!
2017-03-02 - Guitar Philosophy 1001- Be Prepared For the Situation (Thursday 2017-03-02)
2017-02-21 How to Hot-Rod the Hell of your Stratocaster for $50! (Tuesday 2017-2-21)
Resentments and Rambling from a Guitar Junkie
---> http://trashedengineering.blogspot.com/
#16
Quote by forsaknazrael
Ya, put it back in for voltages. Measure each pin of the opamp, with respect to ground.


i checked conatnuity on the IC and everything was solid that way.

so next i should power up and read the voltages from the IC to ground.

as far as ground, is the case grounded? (i am assuming so).

sorry i am a little short on thought tonight. its almost 5am and i was up at 6am yesterday.
WTLT 2014 GG&A

Quote by andersondb7
alright "king of the guitar forum"


Quote by trashedlostfdup
nope i am "GOD of the guitar forum" i think that fits me better.


Quote by andersondb7
youre just being a jerk man.



****** NEW NEW NEW!
2017-07-07 2017-07-07 Update and a Chat On Noise Constraints *** NEW FRIDAY 7/7
2017-04-13 RUN AWAY from COMPUTERS!!! TCE? RANT ALERT!!!
2017-03-02 - Guitar Philosophy 1001- Be Prepared For the Situation (Thursday 2017-03-02)
2017-02-21 How to Hot-Rod the Hell of your Stratocaster for $50! (Tuesday 2017-2-21)
Resentments and Rambling from a Guitar Junkie
---> http://trashedengineering.blogspot.com/
#18
Quote by forsaknazrael
Yes, the enclosure should be grounded, if the jacks are well connected. Read each pin. The pin next to the dot on the opamp is pin 1, and it goes CCW to pin 8.


jacks are grounded and tight. each pin at 9V? so i will take a shot at that, but christmas stuff is interfering with my progress. goddamn my wife makes some killer cookies .
WTLT 2014 GG&A

Quote by andersondb7
alright "king of the guitar forum"


Quote by trashedlostfdup
nope i am "GOD of the guitar forum" i think that fits me better.


Quote by andersondb7
youre just being a jerk man.



****** NEW NEW NEW!
2017-07-07 2017-07-07 Update and a Chat On Noise Constraints *** NEW FRIDAY 7/7
2017-04-13 RUN AWAY from COMPUTERS!!! TCE? RANT ALERT!!!
2017-03-02 - Guitar Philosophy 1001- Be Prepared For the Situation (Thursday 2017-03-02)
2017-02-21 How to Hot-Rod the Hell of your Stratocaster for $50! (Tuesday 2017-2-21)
Resentments and Rambling from a Guitar Junkie
---> http://trashedengineering.blogspot.com/
#19
If its a standard dual OpAmp...
Pin 4 is ground so 0 volts (Doing a continuity test between pin 4 and a known ground point is also a good idea).
Pin 8 is power, whatever your input power is (9 volts or so depending on the type of power filtering and polarity protection scheme that is used).
Last edited by CodeMonk at Dec 22, 2014,
#21
#1 8.7v (same as adapter)
#2 8v
#3 8
#4 8
#5 4
#6 8
#7 8
8 .01mv

all of the 8v ones are within 8.3 and 8.6.

its a brand new dunlop adapter 8.8V for power on adapter from DVOM.
WTLT 2014 GG&A

Quote by andersondb7
alright "king of the guitar forum"


Quote by trashedlostfdup
nope i am "GOD of the guitar forum" i think that fits me better.


Quote by andersondb7
youre just being a jerk man.



****** NEW NEW NEW!
2017-07-07 2017-07-07 Update and a Chat On Noise Constraints *** NEW FRIDAY 7/7
2017-04-13 RUN AWAY from COMPUTERS!!! TCE? RANT ALERT!!!
2017-03-02 - Guitar Philosophy 1001- Be Prepared For the Situation (Thursday 2017-03-02)
2017-02-21 How to Hot-Rod the Hell of your Stratocaster for $50! (Tuesday 2017-2-21)
Resentments and Rambling from a Guitar Junkie
---> http://trashedengineering.blogspot.com/
#22
Quote by trashedlostfdup
#1 8.7v (same as adapter)
#2 8v
#3 8
#4 8
#5 4
#6 8
#7 8
8 .01mv

all of the 8v ones are within 8.3 and 8.6.

its a brand new dunlop adapter 8.8V for power on adapter from DVOM.



I dunno what type of chip is in there, or exactly what adapter you are using, but no matter what they are, those voltages are all ****ed up.

If it worked before, looks like you have a fried chip.
Last edited by CodeMonk at Dec 23, 2014,
#23
Quote by CodeMonk
I dunno what type of chip is in there, or exactly what adapter you are using, but no matter what they are, those voltages are all ****ed up.

If it worked before, looks like you have a fried chip.


what wold a typical result for a number? see some low and some higher? i will go through it again.

i should be running each pin to ground, right?
WTLT 2014 GG&A

Quote by andersondb7
alright "king of the guitar forum"


Quote by trashedlostfdup
nope i am "GOD of the guitar forum" i think that fits me better.


Quote by andersondb7
youre just being a jerk man.



****** NEW NEW NEW!
2017-07-07 2017-07-07 Update and a Chat On Noise Constraints *** NEW FRIDAY 7/7
2017-04-13 RUN AWAY from COMPUTERS!!! TCE? RANT ALERT!!!
2017-03-02 - Guitar Philosophy 1001- Be Prepared For the Situation (Thursday 2017-03-02)
2017-02-21 How to Hot-Rod the Hell of your Stratocaster for $50! (Tuesday 2017-2-21)
Resentments and Rambling from a Guitar Junkie
---> http://trashedengineering.blogspot.com/
#24
Quote by trashedlostfdup
what wold a typical result for a number? see some low and some higher? i will go through it again.

i should be running each pin to ground, right?



Ok, since Tim is probably asleep or having sex with the neighborhood goat...
What is the chip?
What is the pedal based on?

And your meter has 2 probes.
One goes to ground, the other goes to the pins on the chip (or elsewhere as needed).
Last edited by CodeMonk at Dec 23, 2014,
#25
Quote by CodeMonk
Ok, since Tim is probably asleep or having sex with the neighborhood goat...
What is the chip?
What is the pedal based on?

And your meter has 2 probes.
One goes to ground, the other goes to the pins on the chip (or elsewhere as needed).

You know what's fun in electronics class?

Take a solenoid tester, put one lead on line voltage and poke your buddy with the other one.

Alternatively, charge up a capacitor, yell "Heads up!" and throw it at somebody. Guaranteed they'll catch it, but not for long.
Everyone is entitled to an opinion.

Feel free to express yours so I can make an informed judgement about how stupid you are.
#27
Quote by CodeMonk
Ok, since Tim is probably asleep or having sex with the neighborhood goat...
What is the chip?
What is the pedal based on?

And your meter has 2 probes.
One goes to ground, the other goes to the pins on the chip (or elsewhere as needed).


first off is it consensual that goat rape is a big deal in some parts in the US?



that is the chip. i will type if there is something unclear.

yes have two probes, one from the chip the other to ground.
WTLT 2014 GG&A

Quote by andersondb7
alright "king of the guitar forum"


Quote by trashedlostfdup
nope i am "GOD of the guitar forum" i think that fits me better.


Quote by andersondb7
youre just being a jerk man.



****** NEW NEW NEW!
2017-07-07 2017-07-07 Update and a Chat On Noise Constraints *** NEW FRIDAY 7/7
2017-04-13 RUN AWAY from COMPUTERS!!! TCE? RANT ALERT!!!
2017-03-02 - Guitar Philosophy 1001- Be Prepared For the Situation (Thursday 2017-03-02)
2017-02-21 How to Hot-Rod the Hell of your Stratocaster for $50! (Tuesday 2017-2-21)
Resentments and Rambling from a Guitar Junkie
---> http://trashedengineering.blogspot.com/
#28
Thats a dual OpAmp, so the below applies.

Quote by CodeMonk
If its a standard dual OpAmp...
Pin 4 is ground so 0 volts (Doing a continuity test between pin 4 and a known ground point is also a good idea).
Pin 8 is power, whatever your input power is (9 volts or so depending on the type of power filtering and polarity protection scheme that is used).



Also, check without chip as I said in my last post.
And I couldn't even begin to guess what the voltages are supposed to be elsewhere without know what its based on.

#1 8.7v (same as adapter)
#2 8v
#3 8 < Most OD pedals have roughly half of the voltage of Pin 8 here
#4 8 < Should be Zero volts
#5 4
#6 8
#7 8
#8 .01mv < Should be same as adapter


If you are getting the above voltages, with the chip in, the chip is very liked totally fried.
If you are getting the above voltages, with the chip out, the pedal wold never have worked to begin with.

JRC4558/NJM4558, LM1458, TL072, TL082, TL062, and many others are all pin compatible with that chip.
Although it may sound different.
Last edited by CodeMonk at Dec 24, 2014,
#30
And to clarify a little bit more, that big dot on the IC indicates pin 1.


Still up John?

Me too.. Damn arthritis and not enough rum
Last edited by CodeMonk at Dec 24, 2014,
#31
thank you all very much. i am a bit passed my boozed up eggnog. i will do it tomorrow.
WTLT 2014 GG&A

Quote by andersondb7
alright "king of the guitar forum"


Quote by trashedlostfdup
nope i am "GOD of the guitar forum" i think that fits me better.


Quote by andersondb7
youre just being a jerk man.



****** NEW NEW NEW!
2017-07-07 2017-07-07 Update and a Chat On Noise Constraints *** NEW FRIDAY 7/7
2017-04-13 RUN AWAY from COMPUTERS!!! TCE? RANT ALERT!!!
2017-03-02 - Guitar Philosophy 1001- Be Prepared For the Situation (Thursday 2017-03-02)
2017-02-21 How to Hot-Rod the Hell of your Stratocaster for $50! (Tuesday 2017-2-21)
Resentments and Rambling from a Guitar Junkie
---> http://trashedengineering.blogspot.com/
#32
Quote by CodeMonk
Thats a dual OpAmp, so the below applies.


Also, check without chip as I said in my last post.
And I couldn't even begin to guess what the voltages are supposed to be elsewhere without know what its based on.


If you are getting the above voltages, with the chip in, the chip is very liked totally fried.
If you are getting the above voltages, with the chip out, the pedal wold never have worked to begin with.

JRC4558/NJM4558, LM1458, TL072, TL082, TL062, and many others are all pin compatible with that chip.
Although it may sound different.


its fucxked. where would i get a good replacement chip (ideally identical)? how much
WTLT 2014 GG&A

Quote by andersondb7
alright "king of the guitar forum"


Quote by trashedlostfdup
nope i am "GOD of the guitar forum" i think that fits me better.


Quote by andersondb7
youre just being a jerk man.



****** NEW NEW NEW!
2017-07-07 2017-07-07 Update and a Chat On Noise Constraints *** NEW FRIDAY 7/7
2017-04-13 RUN AWAY from COMPUTERS!!! TCE? RANT ALERT!!!
2017-03-02 - Guitar Philosophy 1001- Be Prepared For the Situation (Thursday 2017-03-02)
2017-02-21 How to Hot-Rod the Hell of your Stratocaster for $50! (Tuesday 2017-2-21)
Resentments and Rambling from a Guitar Junkie
---> http://trashedengineering.blogspot.com/
#33
http://smallbear-electronics.mybigcommerce.com/ic-ne5532/
http://www.mouser.com/Semiconductors/Amplifier-ICs/_/N-4frvm?P=1z0z7v3&Keyword=ne5532&FS=True
http://www.digikey.com/product-search/en?pv1291=177&pv1291=862&k=NE5532&mnonly=0&newproducts=0&ColumnSort=0&page=1&quantity=0&ptm=0&fid=0&pageSize=25
http://www.taydaelectronics.com/ic-integrated-circuits/audio-amplifier-instrumentation-op-amp/ne5532-5532-ic-dual-low-noise-op-amp.html

Among others.
I've bought stuff from all of the above places with good results.
Although Taydya's 1n34a Germanium diodes were not in fact Germanium, although I bought 100 TL072's from them a few years ago that are legit.
Tayda, while in like Hong Kong or some place has a warehouse in Massachusetts.
Mouser is in I dunno, Texas or Oklahoma or something.
Small Bear is in New York (Brooklyn I think).
Last edited by CodeMonk at Dec 26, 2014,
#35
got a new chip, sounds great, functions as designed. thank you all very much!

WTLT 2014 GG&A

Quote by andersondb7
alright "king of the guitar forum"


Quote by trashedlostfdup
nope i am "GOD of the guitar forum" i think that fits me better.


Quote by andersondb7
youre just being a jerk man.



****** NEW NEW NEW!
2017-07-07 2017-07-07 Update and a Chat On Noise Constraints *** NEW FRIDAY 7/7
2017-04-13 RUN AWAY from COMPUTERS!!! TCE? RANT ALERT!!!
2017-03-02 - Guitar Philosophy 1001- Be Prepared For the Situation (Thursday 2017-03-02)
2017-02-21 How to Hot-Rod the Hell of your Stratocaster for $50! (Tuesday 2017-2-21)
Resentments and Rambling from a Guitar Junkie
---> http://trashedengineering.blogspot.com/
#36
Quote by trashedlostfdup
got a new chip, sounds great, functions as designed. thank you all very much!



yay!

Quote by forsaknazrael
Could sample an LM833 from TI for free. That's I do. They also allow you to sample OPA2134s. Helps to have a non free email domain.


i do it from time to time too.
mojostompboxes.com
#37
thanks again tim! still digging the timmy and the zendrive.

WTLT 2014 GG&A

Quote by andersondb7
alright "king of the guitar forum"


Quote by trashedlostfdup
nope i am "GOD of the guitar forum" i think that fits me better.


Quote by andersondb7
youre just being a jerk man.



****** NEW NEW NEW!
2017-07-07 2017-07-07 Update and a Chat On Noise Constraints *** NEW FRIDAY 7/7
2017-04-13 RUN AWAY from COMPUTERS!!! TCE? RANT ALERT!!!
2017-03-02 - Guitar Philosophy 1001- Be Prepared For the Situation (Thursday 2017-03-02)
2017-02-21 How to Hot-Rod the Hell of your Stratocaster for $50! (Tuesday 2017-2-21)
Resentments and Rambling from a Guitar Junkie
---> http://trashedengineering.blogspot.com/
#38
thank john/rob/matt mainly for the repair, i've been awol for a little.

good to hear it's working again though
mojostompboxes.com