Question about Technics SA-DX940
Hello, was wondering if someone could advise on this problem ... Background: My midi Amp (SU-X911) is part of a Technics system (CD player, Tuner, Cassette Deck, Equalizer). The system was bought sometime in the late 80's (yes it's old). Problem: Amp volume (controlled by electronic dial) DANGEROUSLY ERRATIC - suddenly silent for 2-3 seconds, before jumping to almost max! Adjustment to volume control brings it back to normal volume. During the silent and max jump, the volume level display (eg. "-44dB") does not change. Consequences: My precious speakers risk being blown up! Remedy attempts so far: Following advice from an electrician colleague, I've pulled apart the amp, pulled out the volume control potentiometer and spray cleaned it (with electronic spray). I must say the amp was generally very very clean inside. Success? - No, problem returned after one day of amp operation. Other Notes: My colleague now suggests it could be the amp itself playing up (ie. not the volume pot). I listened to a whole CD (45mins) last night, and did not encounter the problem - interesting to see if the problem occurs using headphones as well as the speakers themselves. Any ideas anyone? Would greatly appreciate advice - perhaps there's one bit of the amp I need to look at / replace. Thanks!!!
I have a technics su x911 linked to ars x911 and a sl pj26a and a st x 933l tuner and turntable, they are all linked to each other as is typical however, I can turn the amp on,the red light shows on and everything else will work but not the amp.there is no led display and no vulume control.
the set has not been used for many years but has been kept clean and dry.
do they have to be connected in a certain order, the remote control doesnt seem to make any difference.
Posted on Aug 19, 2009
Its the ic that controls the + and - voltage and there are capacitors that have leaked all the caps on that board need changing could be expensive and time consuming but its the age of it . if i was going to do that job £200 plus\
Posted on Dec 08, 2008
My problem is the volume contorlb they use MN4030B and another MN which has blast on the circuit board.i will like to know number to replace it.This is my email firstname.lastname@example.org you can get me on face book jerrygadogbe.
Posted on Sep 07, 2011
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