Question about Philips LX3000D System
I also had this problem. I fixed it by tracing the fault to a dry joint on Z401, a zener diode responsible for the -7v to IC405/6.
There are 4 zener diodes (Z401 - 4) that should have between 6 and 7 v across them. They're visible from the top side of the main PCB.
There's an excellent Service manual available from here. www.eserviceinfo.com
I'm listening to my LX3000d right now with a smile on my face.
Posted on Apr 04, 2008
"Could possibly be a bad solder joint that doesn't make contact
until something warms up and expands."
That is TRUE.
I have had the same problem but I do not realy bealive this could be
bad solder joint.
Finally I unscrew many screws and find bad joint
at R467 near zenner dide ZD404 and IC408.
Also check all resistors and zenner diode from +12V and -12V supply
which are under thermal pressure.
Posted on Apr 03, 2009
First of all, you must be carefull with flatcables and with statics and ressolder all the heatsinks zones, prior to the big one where the output audio amplifier chips are mounted. Ressolder no matter you can´t see anyting wrong.
After it reassemble the pcb mainboard and gently press the pcb over M62446. It´s the volume and tone control. If the sound fails, it must be ressoldered. (SMD, not easy for beginners, and therefore not recommended) or replaced.
Check other components on the enviroment.
Press gently to test.
Ressolder is recommended for all the main board.
Posted on Nov 29, 2007
Up to today i thought i was the only one that faced this problem but now i see we are many.i am dissapointed that a great and reliable brand like PHILLIPS sells crupy equipment.I thought it was a trustworthy brand but now i will think twice before buying anither PHILLIPS product.I am not a technician to open the product and screw and unscrew.I just wait till the sound appears whenever it does.It's so sad
Posted on Sep 08, 2009
Hi Larry ,Amazing though it sounds,the problem seemed to resolve itself.Shortly after posting my problem on here ,and after getting no response, I decided to buy another theatre system.Believe it or not, the day I bought it, the Philips unit started working again,and actually better than ever.The only thing I could think may have happened is ,the night before it started working again, I stripped the whole lot down, including taking the lid off the cd player ,and cleaned out all of the dust etc. I also cleaned the cable terminals with WD 40. Whether this was the reason it worked I don't know ,but might be worth a try . Ps Its still going strong, but I've kept the new theatre system,cos I know eventually ,as it is a Philips it WILL GO WRONG.
Posted on Feb 08, 2007
Hi jabba, Sorry I don't have a solution for you, but I suffer from exactly the same problem. Everything on the system such as DVD playback works, but I have lost all sound. Used to be an intermitent no sound problem, but now getting nothing. Were you ever able to resolve this problem, posted in August as it seems to be identical to my issue? Regards, Larry
Posted on Feb 07, 2007
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