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neil_squadron
Copper Member
Republic of Korea
5 Posts |
 Posted - 07/04/2008 : 04:17:27
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just wanna seek for infos and help on my rv3
defect is,my rv3 does have wet signal but
doesnt have the dry signal..
ive tried to resolder loos wiring and cold solders
but stil it didnt work,
i dont realy know what might have caused tht defect..
tnx to anyone..looking forward..
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Laurie
Double Platinum Member
Canada
4854 Posts |
Posted - 07/04/2008 : 06:07:33
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Had a problem with my RV-3 too... Not exactly the same, but could cause your symptoms.
The ribbon cable between the two circuit boards had broken conductors. They were where it connected to the potentiometer board. The cable felt "floppy" - 2 conductors were broken. Had to cut the ribbon cable and reterminate it. Fixed the problem. |
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neil_squadron
Copper Member
Republic of Korea
5 Posts |
Posted - 07/04/2008 : 06:14:34
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quote:
Originally posted by Laurie
Had a problem with my RV-3 too... Not exactly the same, but could cause your symptoms.
The ribbon cable between the two circuit boards had broken conductors. They were where it connected to the potentiometer board. The cable felt "floppy" - 2 conductors were broken. Had to cut the ribbon cable and reterminate it. Fixed the problem.
had the two cable connectng the main board and pot board change already but still,doesnt seem to work.. |
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bossarea
Forum Admin
United Kingdom
3652 Posts |
Posted - 07/04/2008 : 10:31:42
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| Hi neil_squadron and welcome to the forum. |
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Dr. Bob
Moderator
Australia
6593 Posts |
Posted - 07/04/2008 : 11:19:32
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Hi neil_squadron
Welcome to the forum from Australia.
Can you tell us what happened to it just before it stopped working properly?
Asd do you mean that there is no signal in bypass mode?
Or when you rotate the mix knob to direct?
Or did you buy it, & it was faulty?
Maybe the Mix pot is open circuit?
Tell us what you can about it.
Regards Dr. Bob
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neil_squadron
Copper Member
Republic of Korea
5 Posts |
Posted - 07/04/2008 : 16:25:58
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tnx for the welcome sirs..
about the rv3..a friend just gave it to me.it was already defective
so i dont realy know what caused it to malfunction..
at bypass,there is a signal just like other boss stomps..
when engaged,there is still a signal,the problem is, its all wet signal.
there is no dry signAL coming out..
sample...
on standard delay setting,you expect to hear the first note hit then
followed by the delay/wet signal...
on my rv3...youll only here the wet /delay signal..
ive checked on faulty wirings,cold solders etc
but stil it doesnt work... |
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Dr. Bob
Moderator
Australia
6593 Posts |
Posted - 07/04/2008 : 17:05:02
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quote:
Originally posted by neil_squadron
tnx for the welcome sirs..
about the rv3..a friend just gave it to me.it was already defective
so i dont realy know what caused it to malfunction..
at bypass,there is a signal just like other boss stomps..
when engaged,there is still a signal,the problem is, its all wet signal.
there is no dry signAL coming out..
sample...
on standard delay setting,you expect to hear the first note hit then
followed by the delay/wet signal...
on my rv3...youll only here the wet /delay signal..
ive checked on faulty wirings,cold solders etc
but stil it doesnt work...
Hi neil_squadron
Are you able to ask your friend, if he remembers what might have happened to it, before if went faulty?
Did you measure the MIX pot to see if it was Open circuit?
Regards Dr. Bob |
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neil_squadron
Copper Member
Republic of Korea
5 Posts |
Posted - 07/04/2008 : 17:15:09
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sir,yah,ive tried asking.
nothing that he did wrong..just the usual routine
plug and play on his pedal board
then he just realized his rv3 aint working..
im sorry sir but i dont know how to measure the mix pot
if its an open circuit,nor determine if its an open circuit.
maybe sir you can guide me on how to do it..
sir can you enlighten me. what would be the issue if its an open circuit or not
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Laurie
Double Platinum Member
Canada
4854 Posts |
Posted - 07/04/2008 : 17:53:42
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Does this happen on both left and right channels? Assuming it is both...
Looking at the schematic, it appears that there are only a few things that can cause the symptoms you describe:
- Q2 is dead
- D4 is open circuit
- C70 is open circuit
- C10 is open circuit
- VR1 has completely failed (unlikely)
Do you have a multimeter to test the components above?
Can you check the voltage at the collector of Q5? It should change when the effect is turned on. |
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neil_squadron
Copper Member
Republic of Korea
5 Posts |
Posted - 07/04/2008 : 17:58:29
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| what do you mean by "open circuit" |
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Laurie
Double Platinum Member
Canada
4854 Posts |
Posted - 07/04/2008 : 18:20:28
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| "open circuit" means it has infinite resistance when you measure it. "burned out" |
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Dr. Bob
Moderator
Australia
6593 Posts |
Posted - 07/05/2008 : 04:10:59
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Hi neil_squadron
Do you have a Tech friend that might be able to help you out,
with the more technical things that we suggest?
I gather that you are good at soldering & similar stuff.
I can be very difficult to explain some of the more Technical things in text on a forum.
We will try to help you out as much as we can, but sometimes you will have to get a Tech friend to help you out, at your end as well.
Regards Dr. Bob
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Laurie
Double Platinum Member
Canada
4854 Posts |
Posted - 07/05/2008 : 18:19:06
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Hi neil_squadron!
Yah, it can be really difficult to work through this stuff in text. Pictures can sometuimes help... can you take some hi-res pictures of the pedal circuit board (front and back)?
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Topic |
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help on defective rv3
