3-3
LCD ELECTRICAL TROUBLESHOOTING GUIDE
Fuse normal?
Fuse Replace
YES
YES
NO
Display condition?
Inverter abnormal
NO
Appear shadow form
interference in black background
IC(U1) normal operate
IC(U1) Check and Replace
YES
NO
+5V normal?
IC(U901) Check and Replace
YES
YES
NO
7.5V, 15V, -10V normal?
D907, D901, D902
NO
Main B/D on located
RGB signal output?
Check and Replace
MPEG1389. (Pin : 184, 185, 187)
YES
NO
IC(U902) and Replace
VCOM signal? (4.5V)
NO
Содержание DP270B
Страница 15: ...3 6 MEMO ...
Страница 17: ...3 9 3 10 PRINTED CIRCUIT DIAGRAM TOP VIEW BOTTOM VIEW MEMO ...
Страница 28: ...3 21 FIG 3 3 FIG 3 4 F U401 PIN8 F U401 PIN8 FE U201 PIN26 FE U201 PIN26 RFL U201 PIN21 RFL U201 PIN21 ...
Страница 33: ...3 26 WIRING CONNECTION DIAGRAMS 1 WIRING CONNECTION DIAGRAM 1 MAIN PCB LCD PCB MAIN PCB MAIN PCB ...
Страница 34: ...3 27 2 WIRING CONNECTION DIAGRAM 2 MAIN PCB KEY PCB MAIN PCB Key PCB ...
Страница 51: ...3 55 3 56 1 MAIN P C BOARD TOP VIEW PRINTED CIRCUIT DIAGRAMS ...
Страница 52: ...3 57 3 58 MAIN P C BOARD BOTTOM VIEW ...
Страница 53: ...3 59 3 60 2 KEY MENU P C BOARD TOP VIEW BOTTOM VIEW 3 KEY FRONT P C BOARD TOP VIEW BOTTOM VIEW ...