GX15
2 – 52
CONFIDENTIAL
9. Back Light does not turn on.
FS502 is mounted improperly, or the fuse is blown.
Is VBAT voltage applied to C530?
Is fuse (FS502) in good appearance, mounted properly, and is
there conduction?
Is IC506 in good appearance and mounted properly?
IC506 is defective or
mounted improperly.
Is 0.8 V or more applied to IC506 pin 4?
C506, R523, R549, and
IC106 are defective or
mounted improperly.
C530, L502, and IC506 are defective.
Is back light setting for Display set to On?
Go to the setting as follows and set it to On:
Settings
→
Display
→
Back light
→
Time out
Does it turn on?
Not defective.
Are R527 and R547 in good appearance and mounted prop-
erly?
R527 and R547 are defective.
Is approx. 10.2 V applied between LED501 anode (A) terminal
and LED503 cathode (K) terminal?
IC506 is mounted improperly or defective.
LED501, LED502, and LED503 are mounted improperly or
defective.
NO
NO
YES
YES
YES
NO
YES
NO
NO
YES
NO
YES
NO
YES
NO
YES
Summary of Contents for GX15
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