The current mk3 sound a lot better too after i hug it to sleep for few days ... serious!!


PS. with some song playing on it la

This post has been edited by chchyong89: Feb 10 2010, 06:25 PM

I'm letting it to play some songs the whole night long, low volume of course
The little thing goes unbelieveable LOUD before the clipping LED starts to light up!

Guys,
Before firing up your TA-2020,if you can and have a DMM, adjust the two trimmer so that you get 0(zero) or as close to zero, the DC offset voltage. Before adjustments both my channels was at -20mV, now I get 0.5mV. SMPS users should crank up the voltage to 14.6VDC, my SMPS is currently set at 14.5VDC.

Till then..

This post has been edited by jazzy939: Feb 11 2010, 12:00 AM

Jazzy, which point to measure the DC offset?

Speaker output terminals. DMM set to read DC volts.

argh i think ill do another bulk after cny...i dont have 1 for myself

altho i dont have a proper place to test things out

oh no! i carelessly shorted the speaker wires together and the t-amp stop working now.. =_+, anyone can help?


From datasheet:

O v e r - c u r r e n t P r o t e c t i o n
An over-current fault occurs if more than approximately 7 amps of current flows from any of the amplifier
output pins. This can occur if the speaker wires are shorted together or if one side of the speaker is
shorted to ground. An over-current fault sets an internal latch that can only be cleared if the MUTE pin is
toggled or if the part is powered down. Alternately, if the MUTE pin is connected to the FAULT pin, the
HIGH output of the FAULT pin will toggle the MUTE pin and automatically reset the fault condition.

But i have no idea how to get it done

This post has been edited by chchyong89: Feb 11 2010, 05:50 AM

chchyong,
If after powering off and on there is still no sound(it shouldn't because the MUTE fuction is latched), you need ground pin 11 temporarily. A short cable is required here. From what I see,it's best to do this from underneath the board. Count and mark the pins carefully, we don't want anymore damage!
You need to do this while the amp is powered, so becareful!

Good luck!

This post has been edited by jazzy939: Feb 11 2010, 07:26 AM

there is 8v on the fault lead...

anyone can do me a favor for measuring the value of R13?

It should be as the pin is on "HIGH" (al least 5V) meaning, mute is ON.
Just take a short wire and ground the pin 11. Value of R13 is of no concerned.

Pin 11 (mute), is originally connected to the ground. i tested it using the DMM. beeeeeeeeeeep...
how about urs unit?

"The MUTE function can be optionally tied to the FAULT pin to allow for an automatic reset in the event of an over current FAULT"
^i done this too, but dont help either. the overload LED is still at the ON state. =___=

jazzy n all,

I've looked at xtorm's diagram but the volume pot is for mono channel, if use dual channel like xtorm's pic below (xtorm, borrow your photo yeah?)



whats the right way to connect? thks!

chchyong,
Get 5VDC from pin 30 and feed it to pin 11.. see if it works..

toda,

Similar to this:

http://images.google.com.my/imglanding?q=p...3ebSRM&start=16

I somehow cannot upload pictures anymore due to this error:

"The requested file upload failed because suitable permissions have not been enabled on the 'uploads' directory. Please contact the board administrator and inform them of this error."

tried, the overload LED will temporaly off when connect together, but still, no sound

Just curious, how long did you do it..? Few seconds?

less than 1 seconds... something like "tertouch"...

Try 'few' seconds longer?
Have you tried contacting Arjen?

Not dead enough, finish it off!

Hehe.. have a heart, kww!

For TA2024 best dc bias is ~6vdc....perhaps maybe you could try between 6vdc and near to 0vdc bias....compare which is the best for ur setup....maybe this apply to T2020 to0....