Hi Fellas,, Just wondering if a TDA 2030a can be powered up with no Speaker load to it?,, Will that destroy the Chip,, ? Thank you..

Hi, Just wanted to post the progress so far and note the findings.. I still have not found what is causing the RS Resistor for the Positive zenor regulator side to over heat,,, But I have found where the problem is..

After cutting pretty much every supply trace on the board including Positive and Negative supply rails as well as the Ground rail all in Multiple places I've worked my way back right to the zenor regulator...

With absolutely no load the Pos rail resistor still over heats.. Very interesting for sure.. I have checked for shorts and there are none,, The voltage is not being loaded down and remains constant at 7.5 volts @ around 65 Ma..

I'm thinking at this point is has to be either a Miscalculated zenor resistor problem or the power transformer is bad? I've checked the AC voltage from the power transformer at the Rectifier input(which I have replaced as well) and the voltage is spot on,,

I'm wondering if there are any other possibilities that I have missed.. There is definitively a problem from the RS resistor, to the Zenor, to ground. I just don't know at this point what it could be,, The Zenors have both been replace along with the 330 ohm resistors,, I'm wondering if the 330 ohm resistor is the wrong value but the positive rail is the only one that heats up , the negative rail is perfect.. This amp must have worked at one point,, This is getting really good. LOL,,, I think the Schematic is attached,,,

Hi guys,, just wondering if anyone can help me Identify the Diode in the picture.. It's from my BassMate 25 repair.. It turns out to be blown and is part of the Baxendal compensation system. I've tried replacing the Diode with a standard low power diode and That dropped my overheating problem to almost half the temp it was but now I'm getting crossover distortion.. Going to try different diodes In34 Germanium and a 914 just to see,, but would be nice to try and replace the original Diode,, Thank you.

Hi,, I am in the last stages of repairing my Bass Mate 25 SS amplifier,, I've replaced the output transistors/drivers etc.. and It works and sounds great,, slight buzz,, and 10 mV DC on the output.. so not too bad I hope,,

The problem is the 330 ohm resistor for the positive side of the power supply, the 2200uf cap and the 7.5 volt zenor are getting RED HOT...When I first started the repair I noticed burn mark just under the resistors and noticed they had used 1/2 watt resistors instead of the 2 watt resistors recommended,, I put in 330 oh 2 watt resistors and the one on the positive side is really getting hot.. I checked it with my laser and It's starting to go up into the 200 degree F area and If i left the amplifier on I'm sure the temperature would keep increasing until the resistor started on fire.. I've checked everything and replaced everything in the power supply with the exception of the Rectifier,,

I thought it may have been the shored output transistors that caused the over heating problem but those are new. I'm stumped,, Any help would certainly be appreciated...

HI guys.. I'm trying to repair a Trainor Bass Mate 25 solid state Bass amp and I was wondering if anyone know's if there is a Schematic available for this amplifier.. The Model number is YS 1076 and it used 2 C 2233 Y NPN output transistors.

Hi I was wondering if anyone can Help with a TDA 2030 audio chip guitar amp oscillation problem that I'm having with my amp build.

I'm using a Single supply and using the Schematic from the Data sheet for single power supply application.

After finally getting the chip to amplify a guitar signal from a tl-072 pre amp, and figuring out where to put the volume control and what size pot to use,, I've managed to get the set up working.. Only problem is,, It oscillates at a particular volume setting.. I'm truly stumped here.. I'm using the components listed on the schematic, but i'm wondering if there is some other component that has not been included? How do I stop this tda 2030 from oscillating? Hope fully some one can help. Thank you...