Sharp XV-Z90E (serv.man10) Service Manual ▷ View online
30
XV-Z90E
»
Formatter Unit Troubleshooting-2/2
No
IC9301 or its peripheral
circuit defective.
circuit defective.
Is there 60-MHz pulse
signal at TP9025?
signal at TP9025?
Is the voltage at pin (1)
of the P2002 main PWB
at high level?
of the P2002 main PWB
at high level?
IC2007, IC2002 or their
peripheral circuit
defective.
peripheral circuit
defective.
Is the P2002 connector
properly connected?
properly connected?
No
Is the specified voltage
applied to the CN1001
connector?
applied to the CN1001
connector?
Yes
Yes
Is the fan running?
Check the ballast unit and
power unit.
power unit.
Check the fan circuit.
Yes
No
No
6
5
30
XV-Z90E
»
Formatter Unit Troubleshooting-2/2
No
IC9301 or its peripheral
circuit defective.
circuit defective.
Is there 60-MHz pulse
signal at TP9025?
signal at TP9025?
Is the voltage at pin (1)
of the P2002 main PWB
at high level?
of the P2002 main PWB
at high level?
IC2007, IC2002 or their
peripheral circuit
defective.
peripheral circuit
defective.
Is the P2002 connector
properly connected?
properly connected?
No
Is the specified voltage
applied to the CN1001
connector?
applied to the CN1001
connector?
Yes
Yes
Is the fan running?
Check the ballast unit and
power unit.
power unit.
Check the fan circuit.
Yes
No
No
6
5
30
XV-Z90E
»
Formatter Unit Troubleshooting-2/2
No
IC9301 or its peripheral
circuit defective.
circuit defective.
Is there 60-MHz pulse
signal at TP9025?
signal at TP9025?
Is the voltage at pin (1)
of the P2002 main PWB
at high level?
of the P2002 main PWB
at high level?
IC2007, IC2002 or their
peripheral circuit
defective.
peripheral circuit
defective.
Is the P2002 connector
properly connected?
properly connected?
No
Is the specified voltage
applied to the CN1001
connector?
applied to the CN1001
connector?
Yes
Yes
Is the fan running?
Check the ballast unit and
power unit.
power unit.
Check the fan circuit.
Yes
No
No
6
5
30
XV-Z90E
»
Formatter Unit Troubleshooting-2/2
No
IC9301 or its peripheral
circuit defective.
circuit defective.
Is there 60-MHz pulse
signal at TP9025?
signal at TP9025?
Is the voltage at pin (1)
of the P2002 main PWB
at high level?
of the P2002 main PWB
at high level?
IC2007, IC2002 or their
peripheral circuit
defective.
peripheral circuit
defective.
Is the P2002 connector
properly connected?
properly connected?
No
Is the specified voltage
applied to the CN1001
connector?
applied to the CN1001
connector?
Yes
Yes
Is the fan running?
Check the ballast unit and
power unit.
power unit.
Check the fan circuit.
Yes
No
No
6
5