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DV-NC100H. Cover, Contents, , Laser beam safety precautions, Important safeguards and precautions, Standard notes for servicing, Preparation for servicing, Operating controls and functions, Cabinet disassembly instructions, Electrical adjustment instructions, Firmware renewal mode, Troubleshooting, Block diagrams, Function indicator symbols, Main Schematic diagram 1 9. - Sharp DVD Service Manual (repair manual). Page 24

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1-10-2
H9741TS
No
Yes
Check D1008, L1012, C1007, C2015 and 
their periphery, and service it if defective.
FLOW CHART NO.9
EV+3.3V is not outputted. 
Is 4V voltage supplied to Pin(1) of IC1003?
Replace IC1003.
Is the "L" pulse (approximately 0V) inputted to 
the base of Q053?
Is the "H" pulse (approximately 5V) inputted to 
the base of Q054?
Is 5V voltage supplied to the 
Pin(37,99) of IC501.
Replace Q053.
Replace Q054.
Yes
No
Is 2.8V voltage supplied to Pin(1) of IC1002?
FLOW CHART NO.10
EV 1.2V is not outputted. 
Replace IC1002.
Check D1030, L1009, C1035, C1107, and their 
periphery, and service it if defective.
FLOW CHART NO.8
P-ON+5V (AL+5V) is not outputted. (P-ON+44V is outputted normally)
Is 5V voltage supplied to the collector of Q056?
Replace Q056.
No
No
Yes
Yes
Is the "H" pulse inputted to the base of Q056?
Check D016, L013, C017, C018, and their 
periphery, and service it if defective.
Check R058, R059, R060 and their periphery, 
and service it if defective.
FLOW CHART NO.7
AL+9V (AL+12V) is not outputted. (P-ON+44V is outputted normally)
Is 12V voltage supplied to the collector of Q055?
Replace Q055.
No
Yes
Yes
Check C014, D014, D017, L010, C015, and their 
periphery, and service it if defective.
FLOW CHART NO.6
P-ON+44V is not outputted. 
Is 44V voltage supplied to the emitter of Q053?
No
No
Is the "H" pulse (approximately 10V) inputted to 
the base of Q055?
Check D054, R055, and their periphery, 
and service it if defective.
No
Yes
Yes
Replace IC501.
Yes
Check AL+5V and 
Timer+5V line, and 
service it if defective.
No
No
Check D013, C013, and their periphery, and 
service it if defective.
Yes
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