XBR-49X835D
23
TROUBLE SHOOTING
FLOW
1-2. NO POWER U-COM FAILURE
DC_OFF_DET check
START
Check Vdd
C418
Is voltage < 5V?
Change IC400
yes
no
Check DC_OFF_DET
R420
Is voltage < 3V?
no
yes
END
IC400 is working OK
END
IC400 is working OK
yes
Check P_ON_#2
P-on ucom #pin14
Is the voltage >3.0V?
Change IC401
no
yes
Check ORESETB
P-on ucom #pin12
Is the voltage >3.0V?
Change IC401
no
yes
Change IC401
no
END
Ucom IC401 is working OK
yes
Check X_SYSTEM_RST
P-on ucom #pin16
Is the voltage >3.0V?
Change IC401
no
yes
If BL_MUTE (R435) is 0V
Check BL_ON
P-on ucom #pin18
Is the voltage >3.0V?
from the previous page
Summary of Contents for XBR-49X835D
Page 66: ...XBR 49X835D 66 DISASSEMBLY 1 5 TAPE 1 XBR 49X835D TAPE 3 4 5 TAPE TAPE TAPE 1 2 ...
Page 67: ...XBR 49X835D 67 DISASSEMBLY 1 6 WIRE DRESSING AND TAPE 1 XBR 49X835D 2 TAPE 3 1 TAPE ...
Page 69: ...XBR 49X835D 69 DISASSEMBLY 1 8 TAPE 1 XBR 49X835D 1 TAPE TAPE 2 3 TAPE ...
Page 70: ...XBR 49X835D 70 DISASSEMBLY 1 9 TAPE 1 XBR 49X835D 2 TAPE 3 1 TAPE TAPE ...
Page 71: ...XBR 49X835D 71 DISASSEMBLY 1 10 TAPE AND WIRE DRESSING 1 XBR 49X835D TAPE 1 2 ...
Page 73: ...XBR 49X835D 73 DISASSEMBLY 1 12 TAPE 1 XBR 49X835D 1 2 TAPE TAPE 3 TAPE ...
Page 81: ...XBR 49X835D 81 DISASSEMBLY 1 20 BRACKET SIDE PDT 1 XBR 49X835D 1 2 3 BRACKET SIDE PDT ...
Page 85: ...XBR 49X835D 85 DISASSEMBLY 1 24 SLIDE CLAMP 1 XBR 49X835D SLIDE CLAMP SLIDE CLAMP SLIDE CLAMP ...
Page 88: ...XBR 49X835D 88 DISASSEMBLY 1 27 TAPE AND LCD PANEL 1 XBR 49X835D 1 TAPE 2 LCD PANEL ...
Page 89: ...XBR 49X835D 89 DISASSEMBLY 2 1 BRACKET WIFI ASSY 2 SMART CORE S BRACKET WIFI ASSY 1 3 2 ...
Page 91: ...XBR 49X835D 91 DISASSEMBLY 2 3 COVER TOP 2 SMART CORE S COVER TOP 1 3 2 ...
Page 92: ...XBR 49X835D 92 DISASSEMBLY 2 4 HSC4 S 2 SMART CORE S HSC4 S 1 3 2 NOTE ...
Page 105: ...XBR 49X835D 105 APPENDIX 3 UNIVERSAL Silicon Tuner Information ...