vinodquilon
Full Member level 3
DTMF IC Test_failure
Pls find the attachment.
After setting the circuit (using mt8870) , when I switch on the circuit
LEDs 1,2,3, & 4 are all suddenly ON without detecting ring volt and key
press. Does this mean the IC is out-of-work. I have only one IC, otherwise
I would have gone for IC replacement.
Pls find the attachment.
After setting the circuit (using mt8870) , when I switch on the circuit
LEDs 1,2,3, & 4 are all suddenly ON without detecting ring volt and key
press. Does this mean the IC is out-of-work. I have only one IC, otherwise
I would have gone for IC replacement.