Philips Cd 304 MK II Decoder problem

morpheous · 26th February 2007, 01:32 PM

Hello,

my philips cd 304 Mk II fault, I have discover a problem but didn't found a data sheet of SAA 7220P/A and M4804A

can you help me

poynton · 26th February 2007, 01:46 PM

Quote:

Originally posted by morpheous
Hello,

my philips cd 304 Mk II fault, I have discover a problem but didn't found a data sheet of SAA 7220P/A and M4804A

can you help me

http://www.alldatasheet.com/view.jsp...hword=SAA7220P

Andy

morpheous · 26th February 2007, 03:25 PM

Is the same of M4804A

Frank.

tubee · 26th February 2007, 07:34 PM

Weak point of a lot of old Philips players: ground plane has bad connection from sub to upper layer. Check for dry solder joints.
I had three (!) faults in a gnd signal to the arm servo of my CD304mk2.

In datasheet the through-pcb gnd spots are identified as a circle with a cross in it. They are a sort of prehistoric fabricated multi-layer pcb. The copper bushing is not allways connecting, best is to drill those spots out and fit a copperwire in them, and solder new.

26th February 2007, 01:32 PM	#1
morpheous diyAudio Member Join Date: Oct 2005 Location: Cagliari	Philips Cd 304 MK II Decoder problem Hello, my philips cd 304 Mk II fault, I have discover a problem but didn't found a data sheet of SAA 7220P/A and M4804A can you help me

26th February 2007, 07:34 PM	#4
tubee diyAudio Member Join Date: Jul 2004 Location: Netherlands	Weak point of a lot of old Philips players: ground plane has bad connection from sub to upper layer. Check for dry solder joints. I had three (!) faults in a gnd signal to the arm servo of my CD304mk2. In datasheet the through-pcb gnd spots are identified as a circle with a cross in it. They are a sort of prehistoric fabricated multi-layer pcb. The copper bushing is not allways connecting, best is to drill those spots out and fit a copperwire in them, and solder new. __________________ Daisy Bell

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26th February 2007, 03:25 PM	#3
morpheous diyAudio Member Join Date: Oct 2005 Location: Cagliari	Is the same of M4804A Frank.

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