Re: Panasonic sc tnpa5081 rebuild
Thank you for your reply tw2005.You are absolutely right.
In AY version is placed IC564 (smd code H2 - AND gate).Output signal from IC564 is marked AA_SEL2 and via SC46(pin1) and on SD board via opto PC904 and IC901 (marked c14 - inverter) delivered to buffers.AA_SEL2 I measured only on SD board.SU board is powered by a signal AA_SEL via pin 9 SC46.
In AW version, the circuit IC564 is missing.
And the second difference I've found is 10 components placed right below the jumper SC50. R819,R820,R818,R919,R799,R798,D792,C797,IC792,IC793.
There are no these components in AY version,only in AW.
I try to desolder 10 components from AW and solder IC564.
Thank you for your reply tw2005.You are absolutely right.
In AY version is placed IC564 (smd code H2 - AND gate).Output signal from IC564 is marked AA_SEL2 and via SC46(pin1) and on SD board via opto PC904 and IC901 (marked c14 - inverter) delivered to buffers.AA_SEL2 I measured only on SD board.SU board is powered by a signal AA_SEL via pin 9 SC46.
In AW version, the circuit IC564 is missing.
And the second difference I've found is 10 components placed right below the jumper SC50. R819,R820,R818,R919,R799,R798,D792,C797,IC792,IC793.
There are no these components in AY version,only in AW.
I try to desolder 10 components from AW and solder IC564.
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