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Appendix
AppendixAppendix
Appendix-
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-3
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3
DMD DRIVER BOARD DEBUG
DMD DRIVER BOARD DEBUGDMD DRIVER BOARD DEBUG
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)