Question about Philips MCD908/37 System

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I have a Philips MCD908 only had it 6 months it started making a buzzing sound from the speakers.so i took it back to richer sounds in leeds it was under guarantee. they replace it. Now 12 months later the same problem again when i turn it on it has a 30 second warm up for the valves then the buzzing starts if i turn the volume knob off it stops. but turn it to any number on the volume scale the buzzing starts. the shop will not take it back out of guarantee

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: Sound Problem

Hello people.
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.

Charlie

Posted on Nov 29, 2007

  • 20 Answers

SOURCE: Philips HTS3450 System Problem buzzing/clicking sound on startup. Now nothing.

As I found somewhere on the internet; there are two 470uF/25V capacitors on the power supply board in the sub-woofer that are the cause of buzzing, crackling and then eventually no sound. Go to Radio Shack and buy two Catalog #: 272-1030 470uF/35V capacitors and change them out. They are in the middle of the Power Supply PCB and are close to the long flat aluminum heatsink. Make sure you match the polarity properly when replacing. Your unit will be as good as new and will proibably last forever now.

Posted on Jul 18, 2008

  • 2 Answers

SOURCE: Philips HTS3450 System Problem buzzing/clicking sound on startup. Now nothing.

I had the same problem except my volume would just decrease after a few minutes of being on like someone was pressing the volume down buttton. If I walked over to the subwoofer and gave it a knock on the top the volume would instantly come back on where I had it set before. I took WheatService's advice and replaced the 470uF/25Vcapacitors and everything is working great now. I am very pleased. BTW, the parts at radio shack were like $3.00. I needed a desoldering tool, which I would recommend for this job...the one with the suction ball. I also needed some more soldering wire for a total repair cost of about $17. If you have all the tools the capacitors will cost you $3.00. Philips wanted to send me a replacement unit for $100.00 and I'm sure the local repair shop would have been the same if not more. Thanks again, WheatService!

Posted on Aug 12, 2008

  • 1 Answer

SOURCE: Philips 30PF9946/12

power on, can hear sound but no picture.
any suggestions

Posted on Aug 31, 2008

  • 1 Answer

SOURCE: Philips Soundbar HTS8100

put it in the bin

Posted on Sep 11, 2008

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