2PAC Mafia
Member
Hi,
I´m trying to repair a jacuzzi control board which shows sensor fault at display. I have measured the sensors, I have tested the sensors are getting 5V from the board and checking the board I´ve seen the values are changing at pin 11 and 12 of TLC542CN (A/D converter) when I heat the sensors, after coming from a LM324. The problem is I don´t have data out at A/D. After checking the datasheet I see I need to get pulses at pin 18 (I/O clock) but I don´t have them. I also checked pin 19 (EOC) is H and pin 15 (CS-) is L.
Pin 18 from A/D is linked to pin 15 at PIC16C57C so my question now is about this clock signal, should it come from the microcontroller or should it come from the TLC542CN? I guess is a signal which should come from the PIC to the A/D...
I´m trying to repair a jacuzzi control board which shows sensor fault at display. I have measured the sensors, I have tested the sensors are getting 5V from the board and checking the board I´ve seen the values are changing at pin 11 and 12 of TLC542CN (A/D converter) when I heat the sensors, after coming from a LM324. The problem is I don´t have data out at A/D. After checking the datasheet I see I need to get pulses at pin 18 (I/O clock) but I don´t have them. I also checked pin 19 (EOC) is H and pin 15 (CS-) is L.
Pin 18 from A/D is linked to pin 15 at PIC16C57C so my question now is about this clock signal, should it come from the microcontroller or should it come from the TLC542CN? I guess is a signal which should come from the PIC to the A/D...