Thanks dmeek, good job with the schematic.

Since i've remount the amp, it goes.
I'm waiting the 1uf caps to resume the reverb...
But my problem is still the same:
The clean mode has too much low volume.

Dmeek you told me to change also the C1 and C5 caps to resume the clear mode, correct?

I'm gonna buy the 2 caps to test it.

Thanks
Paolo

Hy

I'm waiting that the 1uf caps arrive from internet, so i can change them.

Which component is the colprit of the master volume' low level?
Maybe some other caps?

@dmeek do you have the electric schematic of my amp please?

Thanks

Paolo

Hy

Testing IC11 there was -0,07v between pin 1 (near the circle inpressed on the top of Ic11) with red sonda and the ground (the chassis) with black sonda. I have turned the master and reverb pot on 10.

Tomorrow i'll test the 3 caps.

Thanks

Paolo

Hy


I have made the homework:
OK - If i hit the reverb unit (with the amp switched on) i heard the springs rattling through the speaker.
OK - With reverb and master pot set on 10, touching the white RCA tip (connected to CN3 and to the OUT of the Reverb unit), I heard the noise in the speaker.
OK - No footswitch connected
OK - checked the continuity on each reverb cable

How can i check the IC1? Red sonda on pin 1 of IC11 and black sonda on ground?

NOW THE AMP WORKS
AND REVERB SEEMS WORKING... "seems working" because for me the reverb level is too low...

I put here a PDF with my project to read easily the circuit board.


Thanks

Paolo

Hy

I have tested the resistance of the pot with a multimeter (red sonda on the center pin, black sonda on the lateral pin, in both the way)
It shows 0 to 44,8 kohm turning the pot from a side to the other
The pot is ok
There something else to check please?

Wich is the way on the board of the electric current from the reverb pot to the reverb tank and the continue?

Thanks

Paolo

Thanks to all of you

The amp is still working. Let's see in the next week...


REVERB IS NOT WORKING.
Is like if the reverb pot is broken, (I have test the impedance of the reverb tank and it was good).

How can i test the board and the pot with a multimeter please?

Thanks

Paolo

Ok,
Thanks for the clarification.

This night i mount all the board and test the amp

Tomorrow i will tell you if it's OK.

Thanks

Paolo

Hy

Thanks to all of you.

@dmeek  I've just make a test with a cord between effect send-return, The sound is more noisily.

@Phatt  I have test the reverb box (Accutronics 1EB2C1A) with a multimeter:
IN = 57 ohm
OUT = 196 ohm
Reading the instruction in the pdf i think it's ok...

@dmeek  the cord that starts from the board pin "IN" goes to the reverb box pin "OUT" (cord colour: RED). Impedance misured from cord pin 100 ohm
the cord that starts from the board pin "OUT" goes to the reverb box pin "IN" (cord colour WHITE). Impedance misured from cord pin -LO-


I have cleaned the 2 boards and the terminals with the electronic components cleaning spry.
Do i have to use the sand paper?

Now that i have all the boards unmounted, do i have something other to do before to remount and test them? (check capacitors...)

Thanks

Paolo

Hy

Here is the pre pcb front and rear

Problem are:
- after some hours of use (random), if you switch it off to make a pause and than you switch it on, there is no sound of my guitar.

- if you wait some hours (random), than it works but there are the problem listed below (THIS PROBLEM THERE ARE ALWAYS, Also on the first switch on):
- no reverb even if you turn up or down the reverb pot
- low volume level in clear mode, better volume ievel in distorsion mode

Hy

Thanks for the interesting.

Here is the photos of the 2 sides of the power board
And the photos of the Accutronics reverb

Paolo

Hy

I send you the photo of the 2 mainboard of the R80 amp

Now, after one hour of sleep the amp is working...
I don' t know why.

Some more information:
The sound, for an 80watt amp is very low, with the master pot set to half the volume is normal (with my fender mustang 2 - 40watt - with the master pot sert to 1/4, the volume is higher...)
The reverb pot don't change anything in the sound if i set it to 0 or to 10.
The volume is quite double in the distorsion mode respect than in clear mode. There is too much difference...

Let me know if someone of you have the electric schematic, please

Thanks

Paolo

Hy to all of you

My Rocktron Rampage R80 sounds quite well, but sometime if i switch it off and then i switch it on it doesn't sound anymore my guitar.

I hear the the normal knoch when i switch it on
If i insert the footswitch i heard the speaker noises
If i pump up the  master volume i hear the presence in the speaker

What can be?

I saw the two green capacitors in the pre amp section... can they be the cause?

Do you have the electric schematic of this amp please?

Who can help me please?

Thanks

Paolo

Hi to all of you

Do someone have please the Rocktron Rampage R80 schematic?
Or where can i find it, please?
Because in the list of the first post in this section there isn't the website of the Rocktron schematic...
I have searched a post on this forum but i haven't found it.

Thanks

Paolo