Sharp XV-Z90E Serviceanleitung Seite 29

» Formatter Unit Troubleshooting -1/2
Rainbow-like colors on-
screen.
No proper matching in
red, green and blue.
Adjustments made on
"PROCESS MENU"→
"DLP"→"INDEX", but
correction impossible.
Yes
IC9003 and/or IC9004
defective.
No
Check the main PWB
and power unit.
No
IC9301 or its peripheral
circuit defective.
No
5
No
Check the color wheel
sensor PWB.
No
No
IC9301 or its peripheral
circuit defective.
No
Blackout
No
Are connections made
properly with the
SC9101 and SC9001
sockets?
Yes
Is the color wheel
running?
No
Is the specified voltage
applied to the P9002
connector?
Yes
Is the voltage at the
positive-polarity pin of
C9308 as specified
(+5V)?
Yes
IC9101, IC9102 or their
peripheral circuit, or
color wheel defective.
Is a lamp turned on?
Yes
Is there 150-Hz pulse
signal at pin (2) of
P9003 with no signal
input?
Yes
Is the voltage at pin (9)
of IC9301 as specified
(+23 to +26V)?
Yes
Is the voltage at pin (13)
of IC9301 as specified
(-26V)?
Yes
Yes
Is the voltage at pin (49)
of IC9301 as specified
(+7V)?
Abnormal picture
Others
No
Is connection made
properly with the
SC9001 socket?
Yes
Is the voltage at pin (3)
of IC9007 as specified
(+2.5V)?
Yes
Are there 400-MHz
No
sine-wave signals at
pins (18) and (20) of
IC9001?
Yes
IC9003, IC9004, IC9006
or their peripheral circuit
defective.
6
29
XV-Z90E
XV-Z91E
Thick, white vertical
stripes (flashing).
No
Are there dust deposits on
DMD, formatter board and
cLGA contact terminal?
Yes
Refit the DMD, optical
mechanism and formatter
board PWB.
IC9001 or its peripheral
circuit defective.