sachu
Headphoneus Supremus
- Joined
- Oct 29, 2006
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Beefy Said
Quote:
Ah, its easier if I just type it out......
Check your digital voltages first. Should be 5V from each 78L05. Should be 5V across one of the LED terminals, 0V across the other.
Check the encoder terminal block. Top three pins on the outside of the board are grounds. If you have the push-button switch, one of these goes to one half of the switch, another goes to the common (middle pin) on the encoder, one spare.
The pin with the arrow at the encoder terminals (PA0/pin13 on the ATTiny) goes to the other half of the switch. There is a good chance to troubleshoot here...... if you switch across PA0 and ground correctly, mute will switch on/off. You can measure voltage across the LED terminals to see if mute comes on and goes off with switch presses.
The other two encoder terminals (PA1/pin12 and PA2/pin11) connect to channel A and channel B on the encoder respectively.
Ok, so when i depress the mute switch the voltages across the LEDs stay the same. The output level always settles down to 4-5mVAC. J2 is shorted.
I am reading 5V for the digital supply and +/-15V for the analog section.
Am I missing something?
Is it possible that the uC isn't programmed at all?