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 32

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1-10-10
H9741TS
D-FG
D-PG
5Vp-p
2.5Vp-p
FLOW CHART NO.6
Capstan Motor does not rotate.
FLOW CHART NO.7
Drum Motor does not rotate.
FLOW CHART NO.8
Drum Motor rotates only for a few seconds.
FLOW CHART NO.9
RF-SW signal is not outputted.
Is the Drum Motor rotating?
Is 5V voltage supplied to Pin(2) of CN502?
Is 12V voltage supplied to Pin(1,11) of CN502?
Replace the Capstan Motor Unit.
Is over approximately 2.6V voltage supplied to 
Pin(5) of CN502?
Check the P-ON+5V line and service it if defective.
Check the line between Pin(5) of CN502 and 
Pin(76) of IC501, and service it if defective.
Check the AL+12V line and service it if defective.
Check the AL+12V line and service it if defective.
Check the AL+12V line and service it if defective.
Check the P-ON+5V line and service it if defective.
Check the line between Pin(8) of CN502 and 
Pin(77) of IC501, and service it if defective.
Replace IC501.
No
No
No
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Is 5V voltage supplied to Pin(2) of CN502?
Is the drum PG/FG signal inputted to Pin(90) of IC501?
Is the drum PG/FG signal inputted to Pin(90) of IC501?
Is 12V voltage supplied at Pin(1,11) of CN502?
Is the RF-SW signal outputted to Pin(18) of IC501?
Is 12V voltage supplied Pin(1,11) of CN 502?
Replace the Capstan Motor Unit or Cylinder 
Assembly.
Replace the Capstan Motor Unit or the Cylinder 
Assembly.
Replace the Capstan Motor Unit or the Cylinder 
Assembly.
Replace the Capstan Motor Unit or the Cylinder 
Assembly.
Refer to "FLOW CHART NO.7" <Drum Motor does 
not rotate> and "FLOW CHART NO.8" <Drum 
Motor rotates only for a few seconds>.
Is over approximately 2.6V voltage supplied to 
Pin(8) of CN502?
Yes
Yes
Yes
Yes
Replace IC501.
Yes
Yes
Yes
Yes

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