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Actually, the same thing happened to me, except, I screwed up the orientation of the TK2050 chip. Here's another tip to remove the chip in case you commit the same mistake. Flood each side of the...

I'm also experiencing really toasty chips, so I tried putting a 24v mini fan inside the chasis. For the 24vdc, I used a 7824 voltage regulator, with both positve and ground points soldered directly...

I was finally able to get my amp4 to work and while doing the regular voltage tests, I didn't use any fuse. The amp played ok, except for the toasty 5v regulator and the amp IC. I placed the amp in...

Btw, did you also remove u5? I followed your advice, but q10 became a bit toasty. I think fabio68 also removed u5, and this cured the q10 heat problems? Thanks for the post.

Need a bit of help regarding the resistor connected to the relay. I have 28vdc supply going to the Ta2050 IC and the relay, what resistor value should I use? There are 2 values supplied with the...

Interestingly, this is a rev 1.00 board. I'm just as baffled as you. I checked all the solders, and resoldered all of them, removed the tripath chips and resoldered them (which was a real pain) but...

I tried removing the inductor, the result was an increase in voltage output from Q1 to 10v while Q2 outputs 9 volts. Btw, I have another bare amp4 here, just wondering if I can do the 9v and 5v...

Another question regarding the L5 inductor, should the thing measure any form of resistance when measured from one end to the other? Mine looks like a short from end to end.

Mr T, did you measure 20vDC out of the rectifiers? Mine's different, I feed the amp 20vAC, however, after soldering the 5v section, the rectifier outputs only 4vDC. There must be a short somewhere,...

Hi, I'm also having a bit of a problem with the 5v section myself. My 9v section went well, however, once I soldered the 5v section and the rest of the smds, I can't get the right voltage off the 9v...

Could it be you have the input, output and ground lines soldered improperly on the volume pot? Generally, with the shaft facing you, and the solder points pointing upwards, the leftmost set should be...

c30 is at the output stage, don't think that's causing the short. Please check all components on the PSU section. The rectifier, the big 16,000uf filter cap, the regulator, and the voltage setting...

You can do one leg to adj of lt1084 the other leg to the ground plane or the (-) of c99, since you used a jumper for r102 to set working voltage to 13.6. However if you're planning on using 14.1 or...

You're getting the right voltage on c99 after the rectifier diodes, which is INPUT AC voltage x 1.414. So 19.1 is close enough. The problem is on the regulator and the voltage setting resistors....

Think its c102 alright, better do a resistance check for continuity. Since it is parallel to those 2 resistors, one of the ends of the cap should have a direct connection to adj leg of the regulator,...

Bstrum, there's a capacitor parallel to both r101 and 102, can't remember if its an electrolytic. Purpose is noice reduction I think.

There are actually no schematics for the amp6, but as far as the PSU section, it goes this way:
AC input -> rectifier diodes -> big 16,000uf filter cap -> lt1084 voltage regulator (In leg). Between...

Follow the instruction, white line on diode is cathode end. Although cathode is the negative side, you'll notice that its only when you put the red probe on the cathode side where you'll see a...

Try checking the red diode first, make sure the legs are not shorted, secondly, with the amp turned off, set your multi-tester for resistance x1, then have the tips of the probes connected to the...

If you're adventurous and want to test if your Red diode indicator works the way they should, try shorting the + and - output of one of the speakers, that should cause the amp to mute temporarily and...

Once you have the trafo's AC output attached to the board, you can check voltages in 2 areas, the first one is the big electrolytic capacitor, its the big filter cap before the lm1084. The voltage...

Make sure you make the measurements of the MOSFETS off the board. Check your dc voltage outputs, they're in the millivolts range (DC offset), use your testers VDC meter, set to around 2vdc, and check...

The replacement MOSFETS I got are the same D-G-S form, and I followed sparkgap's tips, and finally the LEDS are working the way they should be. The red blinks when the amp clips, green light is on...

Yep, the "good" diodes for the orientation as printed is S-G-D, however, there's another 2n7000, with the same shape, but with a D-G-S form, thus the need to reverse its orientation vis-a-vis the...

Interesting sidenote. I checked 2n7000's data sheet, and there are actually 2 types of these in the same To-92 body, and if you look at the relation of the Drain and Source leg, there's actually a...