SOURCE: my lg ht752th.dh dvd player
Hi Mark, If you can't do the job yourself, I would advice you to look for a
professional to troubleshoot the symptom. Hope I helped you.
If you have necessary tools and test instruments, know safety precaution in
basic troubleshooting try the steps below to solve your problem.
Assuming that the disc is good.
1.Clean the lens. -
Sometimes because of dust the lens can't read any disc. Try clean the lens by
soft cotton buds. Be careful while doing this.
2.Check the ribbon -
Check the ribbon connected to the lens from the main board for scratch, damage. Once it has an
open line then of course the lens can't read the disc. Also try to erase the
contact by pencil eraser. If you've done the steps above and the symptoms still
there then the next step requires you a little knowledge in soldering technique
and reading the ohmmeter.
3.Check the Spindle motor - Check
the motor that spin the disc with an ohmmeter. You can test it using the
ohmmeter (x1) even it is connected on the lens assembly.Good motor - reading should be fairly high and it
will spin. Bad motor-
reading will drop to low resistance and will not spin.
Hint : 50% of my repaired
unit the above parts are commonly caused of the problem.
If you confirmed that you have a defective motor then replace it with a new
one. Before replacing the new motor you have to check the clearance of the disc
holder with the old one. The clearance should be the same as the old because if
not the lens will not read the disc if it is too far or too close.
If the above steps didn't cure the problem, high chance that your optical lens
was faulty.
Have a nice day!
Thanks for using Fixya.
When you use SIMPLINK function, you have to
connect to the OPTICAL IN 1 jack to enjoy TV
sound to your speaker system.
Basically you need to have the Audio go from TV to receiver and setup receiver to that Input to output surround sound to all speakers.
If you have a cable box or satellite receiver, hook that output into the receivers input and that should work.
My setup is DirectTv HDMI output goes into the LG Home Theater HDMI Input 1, and LG goes HDMI output into the TV HDMI input 1.
so to watch DirectTV, I switch LG Home theater to HDMI Input 1. and TV is on HDMI input 1 (to view LG HDMI output from DriectTV, Blu-Ray, Vudu, etc.)
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