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Old 4th November 2003, 02:23 PM   #1
cdl is offline cdl  Denmark
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Question Mystery chip....?

Hi!

My CDP has a chip that I can't really figure out what's doing.

It is a Philips chip with 44 pins and is marked:
QC8868HP
K5D770CA

Can't find data sheets anywhere or anything. Has anyone got a clue? help appreciated!

b.t.w. it is not the DSP, there's an SAA7345 in there too; and probably not the dac as there's also a TDA1305.

/cdl
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Old 4th November 2003, 03:17 PM   #2
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I would say it's a controller. Where is it located, near the drive, or on the display/buttons board ?

Just my 2 cents
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Old 4th November 2003, 03:22 PM   #3
Netlist is offline Netlist  Belgium
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We might find something if you give us the model nr. of the player (on the backside) and the position number of the chip on the pcb.

/Hugo
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Old 4th November 2003, 03:25 PM   #4
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Sounds to me like the controller indeed. How old is that player? Could be a derivative of the 8800 or 6800 microcontroller series that were used by Philips before they switched over to 8050 series.

Jan Didden
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Old 5th November 2003, 08:06 AM   #5
cdl is offline cdl  Denmark
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Hi Guys, ta for the responses!!!

First of all, my apologies, the chip is labeled
OQ8868HP and not QC as I stated earlier. Damn that small writing... needed a magnifying glass to see the text clearly.

Which makes stuff easier... I found out what it is! It's the "digital servo" apparently for the laser mechanism of the transport (CDM 12.4)!

It IS puzzling that a search for "*8868*" on the Philips Semiconductors site didn't return any useful hits... must be a lousy search engine!

So maybe I should get better glasses


On the other hand, nothing is wasted - your responses prompted me to have a closer look at the fellow with a magnifying glass, and whilst doing this I:
1) found out what the actual markings of the chip were a.s.o.
2) discovered a resistor I must have fried while installing the Elso's clock (my own fault , NOT Elso's )

So thanks - this forum really is a great place!

Cheers!
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