4.5 Keypad backlight trouble
Key Pad Back Light is on as below :
Key pressing
→
PM6650 KYPD_LED_EN go to Low
→
LED On (Key Pad LED controlled by
PM6650)
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 81 -
Check device open :
LD501~ LD516
R511~ R520, R838,R839,R900~ R903
Start
Check device short :
LD501~ LD516
NO
Yes
Key press
Signal KYPD_LED_EN
is Low?
+VPWR is OK?
Check the VA501
Change the main board
NO
O
Yes
Yes
NO
Some LED
is not work?
Work well?
Yes
Change the Key FPCB
NO
End
Check device open :
LD501~ LD516
R511~ R520, R838,R839,R900~ R903
Start
Check device short :
LD501~ LD516
NO
Yes
Key press
Signal KYPD_LED_EN
is Low?
+VPWR is OK?
Check the VA501
Change the main board
NO
O
Yes
Yes
NO
Some LED
is not work?
Work well?
Yes
Change the Key FPCB
NO
End
Start
Check device short :
LD501~ LD516
NO
Yes
Key press
Signal KYPD_LED_EN
is Low?
+VPWR is OK?
Check the VA501
Change the main board
NO
O
Yes
Yes
NO
Some LED
is not work?
Work well?
Yes
Change the Key FPCB
NO
End
47
R516
R515
47
+VPWR
47
R514
R511
47
LD503
SSC-TWH104-HLS
SSC-TWH104-HLS
LD504
LD502
SSC-TWH104-HLS
SSC-TWH104-HLS
LD501
SSC-TWH104-HLS
LD509
SSC-TWH104-HLS
LD505
SSC-TWH104-HLS
LD510
EVL14S02200
VA501
47
R517
47
R512
SSC-TWH104-HLS
LD508
LD507
SSC-TWH104-HLS
LD506
SSC-TWH104-HLS
47
R519
R520
47
SSC-TWH104-HLS
LD512
SSC-TWH104-HLS
LD511
R518
47
R903
47
R902
47
R901
47
R900
47
LD516
SSC-TWH104-HLS
LD515
SSC-TWH104-HLS
LD514
SSC-TWH104-HLS
LD513
SSC-TWH104-HLS
R839
47
R838
47
R513
47
KYPD_LED_EN
Z3X-BOX.COM
Содержание HB620
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Страница 203: ...Note Z 3 X B O X C O M ...