Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
repair is done:
I changed C2/C5 and strangly enough this reversed the problem; defective speaker became good and the former good one became subdued.
maybe because the new caps were slightly different in voltage (old: 25V, new: 50V)
so I changed C9/C12 and this time sound was good and balanced...
the headphones sound is OK in both speakers.
I will order all the small capacitors (not the 2 big ones), and first try to change C2/C5 because they are clearly related to the TDA's defective speaker.
I need several 22uf/25V but on my electronic parts webshop they have only 22uf/50V in regular...
I bought those speakers new on a website, but may have gotten refurbished ones. I did no solder repair on it yet (just tried to clean a bit), maybe someone did without me knowing.
the wire which is not quite soldered in relates to a capacitor (read on multimeter 5V not decreasing, spec. 100...
yes, both speakers are identical 2x30W (not 40W)
power on:
all TDA have the same temperature, no suspected heat or coolness after 15 min.
volts level at various electrolytic type capacitors, I read on multimeter:
•20V not decreasing (for 100 uF/25V) and for the 2 big capacitors (4700...
hi Brad,
on the pictures I can see black stuff leaking around the capacitor, but I think it's glue because it's thick and hard...but there's a lot and it's not normal.
on another picture it's more redish, but I suspect it's glue too.
and with all that glue it's hard to tell if there is any...
Hello everyone,
only one speaker works correctly, the other one the sound is subdued.
may this be caused by bad capacitor ? :?:
(my mistake is to have left those speakers turned on 24/24 more than two years, it's heating and there is no ventilation)
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
