yet another Phase 90 ?, for pedal moders though

C

Cazmarzak

New member
Everyone is talking about the R28 mod. Well upon taking my pedal apart, I don't see anything that says R28, there is R27 though.

Also , I've seen guys do them that have different colored LEDs, just curious, but how do you do those?

Keep in mind, that I have never done this before, but want to try and fool with it.
 
Re: yet another Phase 90 ?, for pedal moders though

Is your Phase 90 a Dunlop reissue? If so, keep looking, R28 is on the upper left-hand corner of the board if my memory serves me correctly...it's been a while since I've opened up one of those pedals, so I could be wrong.

As for LED's, you can get a replacement of a different color from www.smallbearelec.com.

Ryan
 
Re: yet another Phase 90 ?, for pedal moders though

Ryan,

Here is what I got, how in the hell do you know what half of these things are, they aren't all labled anything.
phaser.JPG
 
Re: yet another Phase 90 ?, for pedal moders though

Well, now I totally FUBAR'D it! :smack: , I tried to change the led and all I did was unsolder the two pieces to the led and solder anew one back in and now the phaser only makes very low didstorted sound and it just sounds horrible :crying: :crying: :disappoin
 
Re: yet another Phase 90 ?, for pedal moders though

well i can guess on what happened but i don't know for sure, since i have never worked on a phase 90. you might have heated a trace too much which would damage the circuit or since i can't see how the led in in the circuit, it make have been used as a resistor and now has a different value. try putting the old led back in and see wha happens. oh yeah and i can't see where r 28 is at but they should all be marked underneath the resistors, and that makes them hell to see.
 
Re: yet another Phase 90 ?, for pedal moders though

I put the old LEd back in and still have the same problem. If I overheated a trace, Is there any way to fix it?

after you said that , I went and really looked at where I soldered the LED and it looks as if that Is what I did :smack:

That's what I get for trying to do something myself!
 
Re: yet another Phase 90 ?, for pedal moders though

Does John or anybody else do mods for these things? I need one badly. Can you do, o stratdeluxer?
 
Re: yet another Phase 90 ?, for pedal moders though

Boleslaw Gers 666 said:
Does John or anybody else do mods for these things? I need one badly. Can you do, o stratdeluxer?
Click to expand...

Clueless? I've never done one? "YET" ;LOL
 
Re: yet another Phase 90 ?, for pedal moders though

mrfjones said:
well i can guess on what happened but i don't know for sure, since i have never worked on a phase 90. you might have heated a trace too much which would damage the circuit or since i can't see how the led in in the circuit, it make have been used as a resistor and now has a different value. try putting the old led back in and see wha happens. oh yeah and i can't see where r 28 is at but they should all be marked underneath the resistors, and that makes them hell to see.
Click to expand...

An LED is a diode and if it gets soldered in the wrong way,won't work...You may have even overheated not only the trace on the board,but the LED also? You really should let people that know what they're doing,do these kinds of mods...
:smack:

John
 
Re: yet another Phase 90 ?, for pedal moders though

wow i just realized how many mistakes i had in my earlier post. I guess i should wake up before i post. thanks for the correction john.

do either leds still work?

Since i do not work with PCB i do not know any way to fix a trace, if there is one at all. Someone that has experience in these things could possibly run a wire from the led to the next component and bypass the trace, though i am not sure what is connected or if it should be done on a pcb. John can it be done?
 
Last edited:
Re: yet another Phase 90 ?, for pedal moders though

mrfjones said:
wow i just realized how many mistakes i had in my earlier post. I guess i should wake up before i post. thanks for the correction john.

do either leds still work?

Since i do not work with PCB i do not know any way to fix a trace, if there is one at all. Someone that has experience in these things could possibly run a wire from the led to the next component and bypass the trace, though i am not sure what is connected or if it should be done on a pcb. John can it be done?
Click to expand...

To fix a trace you just solder a solid wire between the two original trace points on the board or from another connection that terminates to the burned trace areas....I don't have this problem these days,but I used to use cut off pieces from the caps or resistors I used in my mods...

John
 
Re: yet another Phase 90 ?, for pedal moders though

If you need your pedal or the tracing(s) repaired,you're welcome to send it to me and let me see if I can get you fixed up....It would suck to be out a pedal if it's something easily fixed? I'm sure I'd figure out where R28 is as I see R27 already in your picture...R28 has to be close by! LOL....

I could fix the LED for you also....We're talking cheap brother..it's not about the money,but if I can help you,I surely will....

John
 
Re: yet another Phase 90 ?, for pedal moders though

Actually , it helps a lot, cause even though I probably can't fix it myself, I know it can be fixed, and that it isn't a hard procedure :)

The Led does work.
 
Re: yet another Phase 90 ?, for pedal moders though

Cazmarzak said:
Actually , it helps a lot, cause even though I probably can't fix it myself, I know it can be fixed, and that it isn't a hard procedure :)

The Led does work.
Click to expand...

I will try to help you in anyway I can,but realize I'm not inside of your pedal or standing over it with you to have easy access to fix it....Do you have a continuity tester or an ohmmeter or best if you had both? Can you PM me a nice closeup photo of what you did on the trace side of the board for me to look at?

Do you still have connections(continuity) on both sides of your LED and whatever component you tryed removing or replacing on the pcb?

John
 
Re: yet another Phase 90 ?, for pedal moders though

John,

You are the man! I was comptomplating just throwing it in the trash ,cause around here the bench fee they charge is almost as much as I paid or the phaser and that doesn't include the repair itself.

I sent you a PM

Thanks! I really appreciate it.
Rick
 
Re: yet another Phase 90 ?, for pedal moders though

John,

I don't have any of that stuff unfortunatly :(

If it isn't too much , I would like to just send it to you. Looking at it, I cannot see anywhere that may be messed up, all I know is that when initially removing the LED, I heated the board up pretty good and I didn't know I shouldn't have done that.

I didn't remove anything besides the LED.
 
Re: yet another Phase 90 ?, for pedal moders though

Oh , I actually tried to look at where I thought I may have broken the trace( it's really the only thing near where the led is) and see where the next thing was, and it runs under the input jack and I couldn't see that it was connected to anything.

EVEN IF I THOUGHT about removing that jack Which I would't after this mess, I hav no clue how you would unsolder the jack as it has 6 solder points on it. I dont have a de-soldering gun so I couldn't heat them all at once and be able to pull it off the board.
 
Re: yet another Phase 90 ?, for pedal moders though

mrfjones said:
wow i just realized how many mistakes i had in my earlier post. I guess i should wake up before i post. thanks for the correction john.

do either leds still work?

Since i do not work with PCB i do not know any way to fix a trace, if there is one at all. Someone that has experience in these things could possibly run a wire from the led to the next component and bypass the trace, though i am not sure what is connected or if it should be done on a pcb. John can it be done?
Click to expand...

I typed this before I read John's responses ...so ...

You can buy a conductive trace pen (~$14) from an electronics supplier ... you can *draw* the trace back on the board if you lifted it (done that a few times on old BOSS pedals) ... and yes ,space permitting you can drill a hole in a *healthy* part of the trace to make a solder pad , and run a jumper wire to
complete the connection ... simple in theory, but sometimes turns into a real bear. As to whether or not the LED is in the circuit path as to supply or bias, well that I could say (don't have an RI schematic), if you toasted the LED (didn't use a heatsink) it could be fused into becoming a resistor it's self (as diodes do control the flow of current), and you could be draining most the the batteries supply voltage to ground, or have upset the bias enough to make the opamps function improperly. Anyway, like John said, you might want to pop it to him, and have him deal with it.
 
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