Boss Riot R3400D

[cajones65]

Does anyone have the amp guts of a Boss Riot R3400D, I believe the owner of this amp thought he was fixing this amp. But really messed it up. I need to know the correct resistor value for R11, R27. and R28. By the PS Fets.

 

[Perry Babin]

R27 and 28 are 10 ohms. I don't see R11.

 

[cajones65]

Hey Perry, I know that the ones in the board are 10ohms, but I dont think that they are the original ones, R11 is right in front of the 4 caps

 

[Perry Babin]

10k ohms? 1k? What does the one in the board measure?

See attached.

 

[cajones65]

They measure 10ohm, but this amp was worked on by someone else, I think the owner. These resistors were not put in by factory, can tell by the way the legs are bent. The soldering was awful, leads not cut off.

 

[cajones65]

They are correct, I see in your photo. Do you happen to have the schematic for that amp by chance?

 

[Perry Babin]

Not for this amp. What do you need to see on a diagram?

 

[cajones65]

I dont have an output on the driver board to the outputs. I have a good signal off the KA3525a, all the voltages are correct. Same as in your guide. Not exactly sure how the low and high drives run through this board.

 

[Perry Babin]

email me

babin_perry@yahoo.com

 

[cajones65]

This is the driver board in question.

 

[cajones65]

Perry I am getting 1.15v across the opto terminals for the on switch for the driver board 3 and 4, 4 black probe and 3 red. I am getting 86.3 across the 5 and 6.

 

[Perry Babin]

Look at the voltages in section 20 of the type-2 page.

 

[cajones65]

Do you want me to post the voltages?

 

[Perry Babin]

No. I didn't know if you saw that section.

 

[cajones65]

I have 1.12volts across the terminals. The opto-coupler should have turned on and brought it to ground, correct?

 

[Perry Babin]

Yes. The opto-coupler appears to be defective.

 

[cajones65]

I will order another TLP521-2. Will update after it comes in. Thank you Perry