ngen33r

I am still doing repairs, but life has decided to take up most of my time. I hope to be getting back into it more after I do some much needed maintenance.

I am but due to the government going after PayPal, I can no longer do this as a hobby so I am restructuring as a business.

Does rail voltage increase with the volume knob? You should be able to see it rise as the gain is increased.

Hot resistors mean bash control board needs repair.

Looks like the bias pots need adjustment. or the feedback to the opamps from the speaker terminals has a broken trace.

This KSW-12 has been fully repaired and recapped. It is ready to replace a defective amp or aging. I am offering a trade-in on this. $85+Shipping with 1 year warranty. Buyer agrees to send defective plate core after purchasing. (This allows me to repair it for someone else)

Hello, I am doing a little house cleaning and trying to clean up my to-do shelf. Some ofyou have seen my forum posts and videos, but to those that are new, I repair audio equipment as a hobby and have been doing so for over 15 years. I have 2 plates ready to go and I am offering a 1 year warranty on the repair through my LLC Supreme Innovations (www.supinv.com). I am offering all my current and future repairs to forum members first before listing on other sites. I am not currently accepting defective plates, but I will pay the shipping on your purchase if you send the bad one back to me. This keeps them out of the landfill and eventually in someoe's living room. My Repair Channel https://www.youtube.com/channel/UCOMzk5nU67lbGj1hLzUkmwQ #1: $115- Sub-10 #2: $115- Sub-10 Shipping NOT included I accept PayPal CashApp Venmo Zelle

You need to remove all that glue and then retest. Look up the data sheet for the chip in the picture. See which pin is the power pin and check to see if it has 12V. The resistors are fine, don't worry about them.

The large resistors to not solve the problem. This was a poor cheap attempt to fix the issue. The problem is the heat from those resistors dry out the cheap caps. The plus is that version does NOT need the glue cleaned off.

I will try to get this to you tonight. In the mean time clean off all that brown glue.

Buzz almost always means BAD CAPS. Replace the 6 smaller Carli caps and all the electrolytics. Blown FETS mean gate resistors need to be checked and also the control PCB.

The BASH board MUST be installed. The mosfets will gate FULL ON and blow if it does not have control.

I am going to try to answer a whole bunch of questions in 1 post. I am back from a vacation so I have a lot of catching up to do. I will update this post tonight with the values. Make sure all bad glue is removed and continue to replace all the CAPS. If this does not work, the PWM IC will need to be replaced. Please post in the RSW thread. A full recap might be needed or the PWM IC failed.

You always have to recap with the resistor.

I am swamped with repairs for now. I have a huge waiting list and summer is busy as hell for me. I do offer amp swaps on 3bay when I have the time to get a few snuck in. Life ruins my hobby.

These amps have signal tracking. The power supplies vary output voltage based on the level of the audio signal. Class H, I believe. 8V is the no signal standby voltage on DC+ You cannot use a variac with these supplies, so eliminate that from the equation. Also if those caps were in backwards. Throw them out and replace them.

NTE6412 IS A DIAC NOT A ZENER DO NOT USE A ZENER!!!! THERE ARE ALSO 2 VERSIONS OF THIS BOARD THAT DIFFER IN VALUES FOR DIFFERENT SYSTEMS. PLEASE VERIFY BEFORE REPLACING ANY COMPONENTS.

I have new PCB's for that part if yours cannot be repaired.

Bash board is the next step once the primary side is stable. Might as well recap the whole board too. Never know whats under them until you pull them.

It's never the caps!

~8V DC

Cleveland. I have a massive waiting list but I do have some trade-ins listed on eBay.