Sharp DV-NC55S Service Manual page 53

FLOW CHART NO.6
PC 9V is not output.
Is 12V voltage supplied at pin(1) of IC9052?
YES
Is voltage of 9V sent out from the pin(2) of IC9052?
NO
Check the IC9052 periphery circuit.
Does the P-CON switch circuit is operate ally?
(Q9056-7, Q9053, etc.)
YES
Are the "H" pulse inputted into the pin(9) of IC8201?
YES
Replace IC8201.
FLOW CHART NO.7
PC 8V is not output.(PC 9V is possible)
Is 12V voltage supplied at pin(1) of IC9052?
YES
Is voltage of 8V sent out from the pin(2) of IC9052?
NO
Check the IC9052 periphery circuit.
YES
Replace IC9052.
FLOW CHART NO.8
PC 5V is not output.
Is 5V voltage supplied at emitter of Q9054?
YES
Is voltage of 5V sent out from the collector of
Q9054?
NO
Check the Q9054 periphery circuit.
YES
Does the P-CON switch circuit is operate
normally? (Q9056-7, etc.)
YES
Are the "H" pulse inputted into the pin(9) of
IC8201?
YES
Replace IC8201.
NO
Check the secondary circuit, AT 12V and PC 12V
switch(Q9053) circuit.
YES
Check for load circuit short-circuiting or leak.
NO
Check each component and if poor the replace.
NO
Check or replace D9091-5.
NO
Check the PC 12V line.
YES
Check for load circuit short-circuiting or leak.
NO
Check the AT 5V line.
YES
Check for load circuit short-circuiting or leak.
NO
Check each component and if poor the replace.
NO
Check or replace D9091-5.
FLOW CHART NO.9
PC -22V is not output.
Is -22V voltage supplied at emitter of Q8202?
YES
Is voltage of -22V sent out from the collector of
Q8202?
NO
Check the Q8202 periphery circuit.
YES
Does the P-CON switch circuit is operate normally?
(Q8201, etc.)
YES
Are the "H" pulse inputted into the pin(32) of
IC8201?
YES
Replace IC8201.
FLOW CHART NO.10
PC 3.3V(1), (2) is not output.
Is 5V voltage supplied at pin(1) of IC9053?
YES
Is voltage of 3.3V sent out from the pin(2) of IC9053?
NO
Check the IC9053 periphery circuit.
YES
Does the P-CON switch circuit is operate normally?
(Q9056-7, etc.)
YES
Are the "H" pulse inputted into the pin(9) of IC8201?
YES
Replace IC8201.
FLOW CHART NO.11
PC 1.8V is not output.(PC 3.3V(1), (2) is possible)
Is 5V voltage supplied at pin(1) of IC9054?
YES
Is voltage of 2.5V sent out from the pin(2) of
IC9054?
NO
Check the IC9054 periphery circuit.
NO
Check the AT -22V line.
YES
Check for load circuit short-circuiting or leak.
NO
Check each component and if poor the replace.
NO
Check or replace D9091-5.
NO
Check the secondary circuit, AT 5V line.
YES
Check for load circuit short-circuiting or leak.
NO
Check each component and if poor the replace.
NO
Check or replace D9091-5.
NO
Check the secondary circuit, AT 5V line.
YES
Check for load circuit short-circuiting or leak.
YES
Replace IC9054.