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14. The Key backlight does not turn on.
Does the power turn on?
YES
Do all the Key backlight LEDs remain off?
YES
Is there 2.75 V of electric potential difference
between both ends of R1046 when trying to
turn on the Key backlight?
YES
Is the voltage 0 V on CN1000 pin 18?
YES
CN1000 is defective or mounted improperly.
The key FPC unit is broken or in poor contact.
15. Mobile Light does not turn on.
Is fuse FS2002 mounted properly, and is there
conduction?
YES
Is the voltage applied to FS2002 when the volt-
age is applied to the battery terminals?
YES
Try the white light and see whether only the red
turns on or none does.
None does.
IC2005 and LED2005 are defective or mounted
improperly.
16. Out-of-range appears and no transmission/reception is available.
In the Japan mode (W-CDMA), "out-of-range" appears, and no transmission/reception is available.
[Reception system]
A
Is the system setting in the network settings is
set to "Auto" or "3G"?
YES
Is the USIM inserted?
YES
B
(To page 2-34)
CONFIDENTIAL
Go to the section "3. Power dose not turn on."
NO
(see page 2-26)
The disabled LEDs are defective. Otherwise,
NO
the resistances corresponding to the disabled
LEDs are mounted improperly.
IC1000 is defective or mounted improperly.
NO
Q1002 is defective or mounted improperly.
NO
FS2002 is mounted improperly, or the fuse is
NO
blown.
CN1501 and CN2000 are in poor contact with
NO
the flexible PWB. Otherwise, the flexible PWB
is broken.
Only the red
Is the voltage 4.2 V or lower on TP2000?
turns on
IC2005, Q2005, L2003, D2004, R2009 and
C2007 are defective or mounted improperly.
Set the system setting to "Auto" or "3G".
NO
Insert the USIM.
NO
2 – 33
NO
YES
902SH
IC2005 and LED2005
are defective or
mounted improperly.
A
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