• Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

karaoke machine

Status
Not open for further replies.

orbit

New Member
Hi, newbie here.My daughters wants me to fix her karaoke machine, but don't where to start. The sound will not come on either the CD or Mic unless the machine "warms up" for about an hour, after that it works fine. Any ideas?
Thanks for any help.
Orbit
 

HiTech

Well-Known Member
Sounds like a component or two may have turned "thermal"... that meaning they are sensitive to temperature and act up accordingly. It could even be a bad solder connection or two that's being affected by components that normally heat up after awhile. You may want to inspect the circuit board for such poor connections, especially near heat generating components like transistors and IC chips mounted on heat sinks. Large power resistors are also likely culprits. A hair dryer set on med. to high with its air aimed at specific components may speed up in troubleshooting the problematic connection or component(s). The unit must be on in order to tell when it is working or not. Do not get the dryer too close to the components since many hair dryers have a wire mesh grid at their exhaust port which could short components.

If you are new at electronics troubleshooting, I would strongly suggest that you NOT remove the back of the unit and go snooping around, for obvious safety reasons. Take it to a repair shop or purchase a new unit.
 
Status
Not open for further replies.

Latest threads

EE World Online Articles

Loading
Top