User Guide

Flow chart of trouble shooting 5-18
5-10 Melody Part
Melody is not work ing
YES
U430 Pin 7
Check the circuit contain ing U102
is H ?
YES
Check
U430 Pin 1
Check the U41 3, U613
Wor king?
YES
U430
Pin 15 = H ?
Check the R441, U106
YES
U430
Pin 14 is workin g
Check the R645, R440, C437
well ? C434, R438, R439, C440
YES
CH3, L_spk-
Change the U430
L_spk+ wor king?
YES
Change the speaker
YES
END