Sharp 902SH Service Manual page 39

10. The display does not appear on Sub Display.
Is 2.9 ± 0.1 V applied to R2005?
YES
Does the display appear after replacing the
Sub Display?
NO
Does the display appear after replacing the SD
PWB and the SD P.W.B. connect FPC?
NO
IC1500 or peripheral parts are defective.
11. Camera does not operate.
The camera does not operate. Enter the test
mode.
Replace the camera module to a properly work-
ing one, and activate the camera.
Is the image through the camera lens properly
displayed?
NO
Replace the SD PWB to a properly working
one, and activate the camera.
Is the image through the camera lens properly
displayed?
NO
Replace the the flexible PWB connected to the
SD PWB to a properly working one, and acti-
vate the camera.
Is the image through the camera lens properly
displayed?
NO
Replace the main PWB to a properly working
one, and activate the camera.
Is the image through the camera lens properly
displayed?
CONFIDENTIAL
FPC or connector for the SD P.W.B. connect
NO
FPC is connected improperly.
Sub Display unit is defective.
YES
The SD PWB is defective.
YES
The camera module is defective.
YES
The SD PWB is defective.
YES
The SD P.W.B. connect FPC is defective.
YES
The main PWB is defective.
YES
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902SH