20 Most Recent Lasonic TRC-931 Cassette Boombox Questions & Answers


Hi,

It only plays Tapes.


Thanks.

Lasonic TRC-931... | Answered on Jun 28, 2016


I assume these are the complimentary pair that drive the speakers. On one of the speaker. You know I think you have a short in the speaker that it drives. Speaker can fuction even if there was a problem with it. I think what happened is when the original transistors shorted out it overloaded the speaker, but not to a point where it is burnt. There is nothing that can overload a power transistor except the speakers, I design a lot of amplifiers, the base input can overload it if you put dc in there, but that would make a the sound all distorted, I assume the sound seem fine. Solution is try connecting a known good speaker and I bet it wont burn out anymore. Even if the speaker look fine don't trust it.

Lasonic TRC-931... | Answered on Apr 03, 2016


YOUR DIFFERENTIAL AMPLIFIER IN THE FRONT END OF THE POWER AMP STAGE NEEDS TO BE CHANGED.
USUALLY THIS IS A DUAL TRANSISTOR WITH EITHER 5 OR 6 LEGS,OR AN IC WITH 8 PINS(4+4)

Lasonic TRC-931... | Answered on Apr 03, 2016


Hello,
if you connect the boombox direct to the your mains of 240v, the appliances will blow up , to avoid that you need a step down transformer to connect the boombox before it goes into the mains source. you do not need any adapter, only if you want to use battery that is when you to swicth to 12v

Lasonic TRC-931... | Answered on Jun 02, 2010


http://www.google.com/search?hl=en&q=Cassette+Drive+Belts Don't click: 6.anxijdt.com/16 link
http://www.wjoe.com/vintageandantiques.htm
http://www.studiosoundelectronics.com/cassette.htm
http://www.vintage-electronics.cc/
http://www.ceitron.com/passive/belt.html
http://www.ceitron.com/passive/passive.html
http://www.ceitron.com/order.html
http://www.metacafe.com/watch/1267468/how_to_fix_your_pioneer_cassette_deck/
http://www.fixya.com/support/t102401-cassette_player
http://www.google.com/products?hl=en&q=Cassette+Deck+Belts&um=1&ie=UTF-8&sa=X&oi=product_result_group&resnum=4&ct=title
http://www.ehow.com/how_114068_troubleshoot-cassette-deck.html
http://www.fixitclub.com/Electronics/Cassette_Deck.shtml
http://www.turntableneedles.com/index.asp

Lasonic TRC-931... | Answered on Sep 29, 2009


That is a dirty pot switch.. The volume adjusting pot gets dirty.. Two things to try..

1.) With the unit off - spinn the volume min to max many many times at a rapid pace.. This sometimes will displace the debris in the pot..

If that does not work --

2.) Get some "tuner cleaner" in a spray can.. At Radio Shack or a similar store.. Lay the radio on its back so the volume knob is facing up.. Pull the knob off carefully.. Use short controlled bursts of the spray.. A few sprays and spin the knob min to max several times and repeat..

Good luck..

PLease dont forget to rate for your free question..

Lasonic TRC-931... | Answered on Aug 20, 2009


A Lasonic 931 ? It has probably been taken apart by someone before you and may have unplugged the power feed from the battery compartment. Remove the rear panel then check the two wires that come from the battery box are connected to the circuit board.If not, then check to see where they go on the board, it`s not hard to do.Look for the little tabs they slide onto..

Lasonic TRC-931... | Answered on Aug 20, 2009


Sometimes the server gets busy. Check the format required for uploading, document size, and try again later.

Lasonic Audio... | Answered on Jun 03, 2015

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