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Component Data Sheets

BA50BC0 keyboard controller psr-e423 can be replaced by L7805?

ELECTRONICA CIENTIFICO

980

hace 5 años

greetings to all and good night ... BA50BC0 keyboard controller psr-e423 can be replaced by L7805? since the BA50BC0 is 3 legs and is bariable and in its 5volt boot output the L7805 is fixed That is my question, thank you for helping everyone.

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ricbevi

17.055

hace 5 años



hace 5 años

It might work for you, but you must prove that the 7805 needs a 3V difference between the input and the output to work properly and that much less manages. The other is that you look for one that is Low DropOut in 5V that there are. -------------------------------------------------- -------------------------------------------------- --------------------------------- Then either is the DAC itself or communication fails (Pins 1 to 4) between the microprocessor IC (IC101) and this.

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ELECTRONICA CIENTIFICO

980

hace 5 años

Friend Ricbevi. Greetings.
I tell him to put the 7805. and turn on the screen ... without them. OSD bone without any letter and after being on for 10 minutes it turns off.
Thanks for the help.

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ricbevi

17.055

hace 5 años

You must measure to see if there is 5V at the output of the regulator, if so and it is stable, there are more problems than only the regulator that burned and it will be necessary to look for it. For something burned and you have to find out that more does not work properly. It may be that the regulator takes temperature in 10min and cuts in excess of this since it has included said IC protection against overcurrent and temperature.

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ELECTRONICA CIENTIFICO

980

hace 5 años

Ricbevi friend. I commented that keyboarding already works just that I don't have audio. and injected audio to the ic 501 and the integrated audio lo
amplify normally and there it is better said ic 501 is not voting the audio signal and that works with the micro and memory
and that makes me think that it would be memory. could you tell me to make a reseet since I never ice it on a keyboard ...
Cheers

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ricbevi

17.055

hace 5 años

For the reset check here https://www.yoreparo.com/es/instrumentos-musicales/preguntas/1225370/teclado-yamaha-psr-e423-se-desconfiguro in the forum or https://www.google.com/ search? q = reset + keyboard + psr-e423 & oq = reset + keyboard + psr-e423 & aqs = chrome..69i57j0.6799j0j7 & sourceid = chrome & ie = UTF-8 in the WEB. The IC501 is a DAC and generates analog audio from digital signals so if you have audio at the output of this (pins: 9 to 12) the problem is not there and you should check IC502 (pins 1 and 7 that are the output of the two channels) to see if it is amplified.

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ELECTRONICA CIENTIFICO

980

hace 5 años

Ricbevi friend.
IC501 does not output the audio signal, I probe it with an audio amplifier and when I inject the audio signal of a DVD if it is amplified by the audio ic of the
keyboard fatty thanks to the help ...

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