XBR-55/65X930E, 75X940E
TROUBLE SHOOTING
FLOW
1-2. NO POWER U-COM FAILURE
21
START
(only for AC-ADP model)
Check TYPE_DET
C503 Voltage.
Is the voltage 0V?
Type Detection Circuit problem.
Check TYPE_DET Line (R521, R522, R523).
Check Power supply harness (CN400 #9pin,10pin).
no
yes
Check POWER_ON
R526 or P-on ucom #pin10
Is the voltage >3.0V?
Try AC Off and On after few minutes.
If #pin19 keep Low, change IC401.
If #pin19 goes High few seconds and downs to Low,
Check +12V_MAIN Line (G board or JK board).
no
yes
Check 12V_MON
R446 Voltage.
Is the voltage >2.6V?
Check +12V_MAIN Line
(G board or JK board).
no
yes
(only for AC-ADP model)
Check DC_MON
R439 Voltage.
Is the voltage >1.8V?
Check POWER_MAIN Line
(JK board).
no
yes
yes
Change IC401
no
Check DC_OFF_DET
R448 or P-on ucom #pin3
is >3.0V?
Check P_ON_#1
CL418 or P-on ucom #pin12
is >3.0V?
Change IC401
no
Continue next page…
Check VDD
C506 Voltage.
Is the voltage >3.0V?
Check +3.3V_STBY LIne (C521, CN400 #14pin)
And (only for AC-ADP model)
3.3V_DDCON (IC403)
no
(only for G-board model)
Check TYPE_DET
C503 Voltage.
Is the voltage 2.6
±
0.2V?
no
yes
yes
Check OPWRSB
R443 Voltage.
Is the voltage 0V?
SOC
Muffin 2
problem
no
yes
Check PGOOD_1
R440 Voltage.
Is the voltage >3.0V?
No POWER - DDCON/LDO
Check 1.0V DDCON (IC604)
And (only for AC-ADP model)
12V DDCON (IC9000 on JK).
no
yes
Type Detection Circuit problem.
Check TYPE_DET Line (R521, R522, R523).
Check Power supply harness (CN400 #9pin,10pin).
yes
Summary of Contents for BRAVIA XBR-75X940E
Page 72: ...XBR 55 65X930E 75X940E DISASSEMBLY 1 7 COVER BTM L PUC 1 XBR 55X930E 72 1 2 3 COVER BTM L PUC ...
Page 81: ...XBR 55 65X930E 75X940E DISASSEMBLY 1 16 TAPE 1 XBR 55X930E 81 TAPE TAPE 1 2 NOTE ...
Page 82: ...XBR 55 65X930E 75X940E DISASSEMBLY 1 17 TAPE 1 XBR 55X930E 82 NOTE 1 2 TAPE 3 TAPE TAPE ...
Page 86: ...XBR 55 65X930E 75X940E DISASSEMBLY 1 21 TAPE 1 XBR 55X930E 86 NOTE TAPE TAPE TAPE 1 2 3 ...
Page 87: ...XBR 55 65X930E 75X940E DISASSEMBLY 1 22 TAPE 1 XBR 55X930E 87 NOTE 1 TAPE 2 3 TAPE TAPE ...
Page 92: ...XBR 55 65X930E 75X940E DISASSEMBLY 1 27 WIRE DRESSING 1 XBR 55X930E 92 1 3 2 4 ...
Page 99: ...XBR 55 65X930E 75X940E DISASSEMBLY 1 34 TAPE 1 XBR 55X930E 99 NOTE 1 2 3 TAPE TAPE TAPE ...
Page 133: ...XBR 55 65X930E 75X940E DISASSEMBLY 2 16 TAPE 2 XBR 65X930E 133 NOTE 1 TAPE TAPE TAPE 2 3 ...
Page 134: ...XBR 55 65X930E 75X940E DISASSEMBLY 2 17 TAPE 2 XBR 65X930E 134 NOTE TAPE 1 2 3 TAPE TAPE ...
Page 135: ...XBR 55 65X930E 75X940E DISASSEMBLY 2 18 TAPE 2 XBR 65X930E 135 NOTE TAPE TAPE TAPE 1 2 3 ...
Page 141: ...XBR 55 65X930E 75X940E DISASSEMBLY 2 24 TAPE 2 XBR 65X930E 141 TAPE NOTE 1 2 3 TAPE TAPE ...
Page 144: ...XBR 55 65X930E 75X940E DISASSEMBLY 2 27 WIRE DRESSING 2 XBR 65X930E 144 1 3 4 2 ...
Page 182: ...XBR 55 65X930E 75X940E DISASSEMBLY 3 14 TAPE 3 XBR 75X940E 182 NOTE 1 2 3 TAPE TAPE TAPE ...
Page 184: ...XBR 55 65X930E 75X940E DISASSEMBLY 3 16 TAPE 3 XBR 75X940E 184 NOTE 1 2 3 TAPE TAPE TAPE ...
Page 190: ...XBR 55 65X930E 75X940E DISASSEMBLY 3 22 TAPE 3 XBR 75X940E 190 NOTE 1 2 3 TAPE TAPE TAPE ...
Page 191: ...XBR 55 65X930E 75X940E DISASSEMBLY 3 23 WIRE DRESSING 3 XBR 75X940E 191 1 2 3 4 ...
Page 198: ...XBR 55 65X930E 75X940E DISASSEMBLY 3 30 TAPE 3 XBR 75X940E 198 NOTE 1 2 3 TAPE TAPE TAPE ...
Page 217: ...XBR 55 65X930E 75X940E DISASSEMBLY 3 48 FFC 75 3 XBR 75X940E 217 1 FFC 75 1 ...
Page 221: ...XBR 55 65X930E 75X940E DISASSEMBLY 3 52 WIRE DRESSING 3 XBR 75X940E 221 2 1 NOTE ...
Page 223: ...XBR 55 65X930E 75X940E DISASSEMBLY 3 54 CUSHION SPACER LD 3L PUC 3 XBR 75X940E 223 NOTE ...