Sharp XV-Z2000E (serv.man12) Service Manual ▷ View online
34
XV-Z2000
DT-400
DT-400
TROUBLESHOOTING TABLE
Checking the basic operation
Does the power LED light up or flash in
red or green?
red or green?
Go to "Checking the power supply system"
and "Checking the power unit".
and "Checking the power unit".
Does the set function with its keys or the
remote controller?
remote controller?
Go to "Checking the peripheral circuits of
the microprocessor".
the microprocessor".
Does the cooling fan rotate, and the lamp
turn on?
turn on?
Go to "Checking the lamp light-up".
Is the user menu displayed?
Go to "Checking the peripheral circuits of
the formatter".
the formatter".
Does the analog RGB input function
normally?
normally?
Go to "Checking the RGB input".
Does the component input function
normally?
normally?
Go to "Checking the component".
Does the VIDEO input function normally?
Go to "Checking of VIDEO input ".
Does the DVI input function normally?
Check the DVI circuit and its peripheral
circuits.
circuits.
Does the RS-232C function?
Go to "Checking RS-232C".
Does the autofocus function?
Go to "Checking the autofocus".
End.
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
35
XV-Z2000
DT-400
DT-400
Checking the power supply system
Is 13V outputted to pins (9) and (11) of
P1707?
P1707?
Is 6V outputted to pins (1) and (3) of
P1707?
P1707?
Go to "Checking the power unit".
Go to "Checking the power unit".
Is the connector of P1707 fully inserted?
Is the voltage of 6V applied to both ends?
Is the voltage of 6V applied to both ends?
Replace the thermal fuse.
Is Bu+5VA outputted from IC1707?
Check IC1707 and its peripheral circuits.
Is B+5V outputted from IC1701?
Check IC1701 and its peripheral circuits.
Is Bu+3.3V outputted from IC1702?
Check IC1702 and its peripheral circuits.
Is Bu+2.5V outputted from IC1703?
Check IC1703 and its peripheral circuits.
Go to "Checking the peripheral circuits of
the microprocessor".
the microprocessor".
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
YES
NO
36
XV-Z2000
DT-400
DT-400
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
NO
ABNORMAL
YES
YES
Checking the power unit
Is each connector of the power unit
fully inserted?
fully inserted?
Securely insert the connectors.
Is the lamp door closed completely?
Fix the lamp door with screws.
Is the bimetal broken?
Replace the bimetal switch or restore
by pressing the red button.
by pressing the red button.
Is AC voltage applied to both AC input
ends of DB701?
ends of DB701?
Replace F701. If other parts are
damaged, replace them.
damaged, replace them.
Is DC voltage of approx. 6.25V
outputted to both ends of C726?
outputted to both ends of C726?
Check D707 and the peripheral circuits
of IC702 on the primary side. If
defective, replace them.
of IC702 on the primary side. If
defective, replace them.
Is DC voltage of approx. 370V
outputted to the cathode of D701?
outputted to the cathode of D701?
Replace the subunit or check the
primary side circuit.
Replace defective parts if any.
primary side circuit.
Replace defective parts if any.
Replace the ballast power supply.
Is the specified voltage outputted to
each output terminal of EA701?
each output terminal of EA701?
Check the secondary-side circuits of
T701. If defective, replace them.
T701. If defective, replace them.
Check the PWB circuits on each output
side.
side.
37
XV-Z2000
DT-400
DT-400
Checking the peripheral circuits of the
microprocessor
microprocessor
Are the voltages of approx. 3.3V and 2.5V
applied to both ends of C8001 and C8056
respectively?
applied to both ends of C8001 and C8056
respectively?
Go to "Checking the power supply
system".
system".
Are the oscillations of 133MHz and
74.25MHz outputted from pin (3) of
X8003 and pin (3) of X8007 respectively?
74.25MHz outputted from pin (3) of
X8003 and pin (3) of X8007 respectively?
Check X8001, X8003 and their peripheral
circuits.
circuits.
Does each terminal of R8038, R8039,
R8041, R8042 and R8050 change?
R8041, R8042 and R8050 change?
Check IC8202 or IC8001 is defective.
Do pins (15) and (16) of IC2002 change?
Check IC8203 or IC2002 is defective. The
I2C bus does not function normally.
I2C bus does not function normally.
Do pins (46) to (49) and (4) to (7) of
IC2002 change when any key is
operated?
IC2002 change when any key is
operated?
IC2002 is defective. The keys do not
function normally.
function normally.
When the power button is pressed, does
the voltage of pin (7) of IC8006 become
3.3V?
the voltage of pin (7) of IC8006 become
3.3V?
IC8001 is defective.
Do pulse-shaped waveforms appear at
pins (1), (2), (5) and (6) of IC8006?
pins (1), (2), (5) and (6) of IC8006?
IC8006 is defective.
Does the voltage of pins (3) and (6) of
IC8003 change?
IC8003 change?
IC8003 is defective.
Is the voltage of pin (2) of Q8002 5V?
Q8002 is defective.
Does the fan rotate?
Check the power supply circuit or fan
circuit on the main circuit.
circuit on the main circuit.
Go to "Checking the lamp light-up".
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES