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Old 19th June 2008, 06:37 AM   #1
hifi13 is offline hifi13  Canada
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Default Service Manual for Sony CDP C505?

hi all,

Just curious if anyone has a service manual for the Sony CDP C505. Looking to do the usual mods, remove muting transistors, swap op amps. Picked it up for 5 bux, wanna see how much I can mod it for little or nothing. Thanks in advance!

Dan
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Old 20th June 2008, 06:56 AM   #2
hifi13 is offline hifi13  Canada
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Anyone?
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Old 20th June 2008, 04:55 PM   #3
Mooly is offline Mooly  United Kingdom
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Can you see what opamps are in it ? Post a pic of the inside around the output stage if you can. There are always ways and means.
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Old 21st June 2008, 02:36 AM   #4
hifi13 is offline hifi13  Canada
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Will post some pics tomorrow, heading out for the night. Thanks in advance for the help.
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Old 22nd June 2008, 04:22 PM   #5
hifi13 is offline hifi13  Canada
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Got around to taking the CDP apart and I have attached a shot of the board. Is the op amp the rc4558P or the 5218A? Also which would be the muting transistors there are a few spots on the board that say mute. Any help is much appreciated.
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Old 22nd June 2008, 04:22 PM   #6
hifi13 is offline hifi13  Canada
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Here's the link to the photo of the board.
http://i307.photobucket.com/albums/nn285/hifi13/016.jpg
http://i307.photobucket.com/albums/n...13/pcboard.jpg
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Old 22nd June 2008, 05:25 PM   #7
Mooly is offline Mooly  United Kingdom
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Hi,
Seen the pics. Not very easy to make out but is it IC502 and 503 that are the M5218A. They are dual OpAmps. So is the 4558 as well. Which is that one ? Is it the single in line one ?
If you want to have a play with swapping these I would suggest fitting 8 pin DIL sockets and trying TLO72 types to begin with. These do at least sound good, suprisingly good actually for what they are. Those two groups of two transistors look as though they could be for muting but can't say for sure without actually tracing the circuit.
Regards Karl
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Old 22nd June 2008, 06:04 PM   #9
Mooly is offline Mooly  United Kingdom
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Hi,
Your keen posting all those . I will have a closer look tomorrow, but the TLO72 will be fine. You can go better still but these take some beating and are they stable in use. A lot depends on what the rest of your system is as to whether you feel the changes are worthwhile. Both the 5218 and 4558 are little better than 741 types so I would go ahead !
Have you ever unsoldered any I/C's before -- you need a good iron with a large (ish) tip (Not a poker) and some desoldering braid. I see the word "mute" on the PCB so it looks promising.
I will post again tomorrow all being well.
Regards Karl
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Old 22nd June 2008, 06:19 PM   #10
hifi13 is offline hifi13  Canada
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Quote:
Originally posted by Mooly
Hi,
Your keen posting all those . I will have a closer look tomorrow, but the TLO72 will be fine. You can go better still but these take some beating and are they stable in use. A lot depends on what the rest of your system is as to whether you feel the changes are worthwhile. Both the 5218 and 4558 are little better than 741 types so I would go ahead !
Have you ever unsoldered any I/C's before -- you need a good iron with a large (ish) tip (Not a poker) and some desoldering braid. I see the word "mute" on the PCB so it looks promising.
I will post again tomorrow all being well.
Regards Karl

Thanks for looking Carl and for all of your suggestions. I really appreciate it! I have unsoldered before and feel confident I could put in the new op amps.
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