Creek Audio T50 Tuner: Help with disabling RDS from printing on display.

[gghodg]

Hi folks,

Is there a pin I can lift or easy adjustment to stop RDS from printing to the display, and only display the FM radio station frequency? I’ve attached the datasheets for the 4 ICs I found on The Control Board. unfortunately I do not have the schematics for the T50.

SAA6588T: RDS/RBDS pre-processor (pins 8 or 16 look interesting)

PIC16F76-I/S0: CMOS FLASH Microcontrollers

Holtek HT16512: Duty VFD Controller

PCF8594C-2: CMOS EEPROM with I2C-bus interface

Thank you

 

[gghodg]

I found one approach that is working:
Connect Pin 19 (CIN) to Pin 6 (DGND)


RDS is no longer printing and I’m not finding any other functions effected by this modification.

 

[rayma]

It would be safer to remove C10. The short to ground after it could damage the band-pass filter.
Then you could still ground pin 19 safely.

 

[gghodg]

Done, thank you. What would happen if the band-pass filter is damaged? Am I understanding correctly that this is outside of the audio signal path, at 57Khz? I had the tuner on for 30 minutes before seeing your thread.

 

[rayma]

We don't know, so it shouldn't happen.
Yes, it's not an audio signal.

 

[gghodg]

Thank you