Sharp XV-Z2000 Service Manual page 38

XV-Z2000
DT-400
» Formatter Unit Troubleshooting
Screen with spectral
colors
Color production of R,
G and B is not correct.
Adjustment by "Process
Menu" →"DLP" →
"INDEX". The failure state
remains unchanged.
YES
Are the SC2001 and
SC9001 connected
correctly?
YES
IC2002 is faulty.
Do the colors return to
correct colors when the
process menu is
entered?
YES
Poor adjustment should
be a likely cause.
Perform readjustment
according to the
adjustment method.
IC9401 or its peripheral
circuits are faulty.
Check the color wheel
sensor unit.
IC9301 or its peripheral
circuits are faulty.
Display in trouble
Black screen
Are the sockets SC2001
and SC9001 connected
correctly?
YES
Does the color wheel
turn?
NO
NO
Does P9402 have the
correct motor drive
voltage waveform?
YES
Color wheel is faulty.
Is the lamp lit on?
YES
NO
Does pin (2) of P2004
have 150Hz pulse signal
in no-signal state?
YES
NO Does pin (9) of IC9301
have the correct voltage
(+23~+26V)?
YES
NO
Does pin (13) of IC9301
have the correct voltage
(-26V)?
YES
Does pin (49) of IC9301
NO
have the correct voltage
(+7V)?
YES
Double-check DMD and
cLGA units.
Miscellaneous
Are the socket SC2001
and SC9001 connected
correctly?
YES
Does the pin (3) of
YES
IC9201 have the correct
voltage +1.8V?
YES
Are the signals fed to the
terminating resistance
(39W) of RDRAM
(IC9203)?(DQA8 and
DQB8 are unused.)
YES
Is the waveform at pins
(18) and (20) of IC9202
the 400MHz sine wave?
YES
IC9203, IC9101 or their
peripheral circuits are
faulty.
NO
Is pulse wave in voltage
at pin (14) of P1701?
YES
Is the correct voltage is
supplied to the each
connector of power and
ballast unit?
YES
Is the fan rotating?
YES
IC2007, IC2002 or their
peripheral circuits are
faulty.
38
Equally spaced white or
black vertical stripes
Black horizontal band
Are the contact terminals
of the DMD, formatter
PWB and cLGA dirty?
Re-assemble the DMD,
the optical mechanism
and the formatter unit.
NO
IC9202, IC9101, X9101
or their peripheral
circuits are faulty.
IC2001, IC2007 or their
NO
peripheral circuits are
faulty.
NO
Check the ballast unit
and the power unit.
NO
Check the fan circuit.