Toshiba P600DL service manual Dmd Driver Board Debug, Appendix-3

Appendix-3

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 Negative=-32V

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)

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