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10. BACK LIGHT DOES NOT TURN ON.
Is VBAT voltage applied to C738?
Which back light does not turn on, Main or External?
Is back light setting for External Display set to On?
Is CN705 in good appearance and mounted properly?
Is the contact point of back light FPC clean?
Is back light FPC properly inserted to CN705?
Is 3 - 6 V applied between TP710 and TP705?
Is 3 - 6 V applied between TP710 and TP706?
Is 3 - 6 V applied between TP710 and TP707?
Is 3 - 6 V applied between TP710 and TP711?
Are C735, C791, C733, C738, C730, C731, R708 and R707
in good appearance and mounted properly?
IC708 are defective.
C
Is back light setting for Sub Display set to On?
Is 3-6V applied between LED703 anode (A) terminal and
LED704 cathode (K) terminal?
LED703 and LED704 are defective.
CONFIDENTIAL
YES
YES
YES
YES
NO
YES
YES
YES
TM200 1ADJUSTMENTS, PERFORMANCE CHECK, AND FIRMWARE UPGRADE
F702 is mounted improperly, or the fuse is brown.
Is fuse (F702) in good appearance, mounted properly, and is
NO
there conduction?
C733, C738, and L703 are defective.
External dis-
play only.
C
Go to the setting as follows and set it to On:
Settings
Phone
NO
Settings
Main
Display
Back light
NO
Does it turn on?
Not defective.
NO
CN705 is defectiv e.
Back light FPC or CN705 is defective.
Clean back light FPC and insert it again. Does it turn on?
NO
Not defective.
YES
Back light FPC is defective.
C735, C791, C733, C738, C730, C731, R708 and R707
NO
are defective.
Go to the setting as follows and set it to On:
Settings
Phone
NO
Settings
External
Display
Back light
NO
Does it turn on?
Not defective.
IC708 is defective or mounted improperly.
NO
2 – 35
NO
YES
YES
NO
YES
YES
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