How I Repaired A DVD Home Theatre System With No Disc Symptoms

 

A friend of mine brought to me his home theatre to me to check it out, the initial complain was that it was not able to read disc.

Upon receiving it on my workbench I pressed the power button and it came up well...  

dvdrepairguide

I pressed the eject disc button and the tray was not opening. May I point out here that sometimes if the spindle motor is shorted it can load down the supply such that even the drawers are not able to open..This gave me a clue that the spindle motor may be shorted even before I opened the machine. 

repairing dvd player

I pulled my best friend analogue meter to confirm if the spindle motor is shorted or not and true the spindle motor was gone. 

I pulled one from my drawer (I always keep several pieces because this motor has a high failure rate and replaced the faulty one). 

Because the polarity of the wires were not marked on the board I decided to cut the two wires to the spindle motor one inch from the board so that I won’t have problems to figure out which wire is which when replacing them. 

dvd player repair

Please note that I have seen a DVD player brought to me with “No Disc” symptoms and I traced the problem was the spindle motor was replaced with a good one but the technician inter changed the positive (+) and negative (-) wires and therefore the disc was spinning at normal speed (500RPM) but in the opposite direction and hence the tech never solved the problem. 

After replacing the spindle motor with a new one which my meter has also confirmed to me that it is okay, the home theatre developed another problem. 

The drawers were closing and opening throughout.  So I tried to figure out what could have gone wrong while replacing the motor. 

After a lot of mind searching, I started to observe the behavior of the disc (movement in and out with the top cover of the home theatre removed. 

I noticed the platter height was quite high and the disc was not loading smoothly. 

To solve this problem of the height I had to use the platter from the previous motor and that solved the height problem and the home theatre DVD module started working again. 

Advice. Please note that whenever changing the spindle motor be sure to note the height of the platter (table) from the spindle motor body because this is very critical otherwise you may solve a problem and create another and end up not repairing the machine. 

spindle motor

Thank you Friends 

By Humphrey Kimathi                                                                   

Author of DVD player repair guide and CRT Television repair Course 

Click Here To Learn DVD Player Repair By Humphrey

 

 

 

 

 

 

Click Here To Learn LCD TV Repair Tips by Kent Liew

 

 

Click Here To Learn Laptop Motherboard Repair

 

 

Click here to learn how you can become a Professional in Switch Mode Power Supply Repair

 

 

 

Click here to learn how you can become a Professional in Testing Electronic Components

 

Click here to learn how you can find burnt resistor value

 

Click here to Get 24 Best Electronics Repair Articles

 

 

 

Click here to learn how you can become a Professional in LCD Monitor Repair

 

 

 

Click here to learn how to repair Plasma Television By Damon

 

 

 

 Recommended Basic Electronics ebook By Greg S Carpenter

  

 

 

 

Recommended Mr Steve Cherubino Laptop Repair Videos For Beginners!

 

 

 

 

Recommended Mr Kent LCD TV Repair Membership website-Visit Now!

 

Recommended Mr Kent Plasma TV Repair Membership website-Visit Now!

 

Recommended Print Head Repair Guide By William Hor

 

 Recommended Mr Kent Projection Television Repair Membership website-Visit Now!

 

 

 

 Recommended CRT TV Repair ebook by Humphrey Kimathi

 

 

Recommended Computer Repair Course

 

 

Automobile Electronics Repair

 

Basic LaserJet Printer Repair

Mobile Phone Repair