DMD DRIVER BOARD DEBUG
1.Check power voltage (1)Check U93 PIN2=3.3V (2)Check U94 PIN3=+5V (3)Check CN51 PIN23,24,47,48=12V (4)Check Q102 PIN2,4=32V (5)Check C591
2.Check echo IC work frequency
(1)check X9 PIN3=58MHZ
(2)check U72A PIN2=14MHZ
(3)check U91A PIN2=9.667MHZ
3.Check control signal
(1)Check CN51 PIN93(PWRGOOD)=3.3V (High active)
(2)Check CN51 PIN91(RESETDMD)=3.3V (High active)
37
