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Old 20th January 2004, 08:44 PM   #1
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Default strange chip???

Hi guys...
My girlfriend had an Panasonic SA-AK20 stereo system with cd changer... This unit died yestarday after 9 years of working. Cd changer went dead. So I have a problem - to make an amplifier out of it. Problem is not making an amplifier but that I don't know what is the chip inside it.
On chip it says:
BC
POWER MODULE
RSN 3502 A
020601

Does anyone knows where to find datasheet for that chip or some schematics. I have to use the same transformer from the stereo system and some of the parts but I don't like to take the schematic from the pcb board... Maybe it could be easier...
Thanks in advance
daniel
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Old 21st January 2004, 02:17 PM   #2
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Old 21st January 2004, 02:25 PM   #3
Ropie is offline Ropie  United Kingdom
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How about turning it into a gainclone, a la Nuuk Enterprises:
Shock horror! Elderly Arcam amp is 'cloned'.
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Old 21st January 2004, 02:44 PM   #4
Netlist is offline Netlist  Belgium
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This is all I have. It's the B version, can't find the difference with the A-version.
Hope this helps.

Greetings
/Hugo
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File Type: gif rsn3502.gif (90.1 KB, 1251 views)
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Old 21st January 2004, 05:52 PM   #5
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Hi guys!

Ropie,
I can't build Gainclone because my tranfo from stereo system is not good (29,7V-0V-29,7V and 13,0V-0V-13,0V all in all aproximatelly 100VA-120Va transfo). The voltages and VA are not good for gainclone - only if You ment with this chip- the chip is aprox 80$ brand new and I would not like to buy some chips instead I would like to rather use this chip because I simply have it and for LM1875 and LM3875 (as I have said) the voltage is not good - but it would be in gainclone style if I could find some datasheets

Netlist,
thanks man- I will see what to do with it- I must turn on my brain cells and see what will come out (hopefully not something +'%&/$"3215%)
It is perfect for a start- thanks again.
I hope I'm free to ask You something if I would have any questions?
best regards
daniel
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Old 22nd January 2004, 05:06 AM   #6
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found picture on net.....
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File Type: jpg rsn3305p.jpg (28.9 KB, 1074 views)
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Old 22nd January 2004, 05:12 AM   #7
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That looks similar to the STK 4042 modules I have...I bet that the circuit would be similar
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Old 22nd January 2004, 07:18 AM   #8
Netlist is offline Netlist  Belgium
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Daniel
SVI3102D and RSN3502 are about the same or at least interchangeable. The datasheet of the STK4042 has a totally different pinout.
IMHO it shouldn't be too difficult to derive something from the next picture. (SVI3102D)

/Hugo
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File Type: gif svi3102d.gif (95.9 KB, 1011 views)
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Old 22nd January 2004, 01:46 PM   #9
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Yes , on the other thread in forum (part with components) I asked also this question an mention that this chip is practically the same as one Zou have mentioned- but I forgot to post it here- so somebody might have shematic that You posted- THAKNS A LOT - my girlfriend will be very happy (hopefully- I will post something in here when it is finished )
thanks
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Old 22nd January 2004, 02:00 PM   #10
Netlist is offline Netlist  Belgium
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Quote:
Originally posted by sparkle
my girlfriend will be very happy (hopefully- I will post something in here when it
Yes, make some nice amp with it!!

/Hugo - would do anything to make girlfriends happy
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