XBR-55/65X900E
TROUBLE SHOOTING
FLOW
1-2. NO POWER U-COM FAILURE
20
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 X900E Series
Page 66: ...XBR 55 65X900E DISASSEMBLY 1 8 TAPE 1 XBR 55X900E 66 1 2 3 4 5 NOTE TAPE TAPE TAPE TAPE TAPE ...
Page 67: ...XBR 55 65X900E DISASSEMBLY 1 9 TAPE AND WIRE DRESSING 1 XBR 55X900E 67 1 2 NOTE 3 4 TAPE TAPE ...
Page 69: ...XBR 55 65X900E DISASSEMBLY 1 11 TAPE AND WIRE DRESSING 1 XBR 55X900E 69 NOTE 1 2 3 TAPE TAPE ...
Page 71: ...XBR 55 65X900E DISASSEMBLY 1 13 WIRE DRESSING 1 XBR 55X900E 71 1 3 4 2 ...
Page 79: ...XBR 55 65X900E DISASSEMBLY 1 21 TAPE 1 XBR 55X900E 79 1 TAPE NOTE 2 TAPE 3 TAPE TAPE 4 TAPE ...
Page 81: ...XBR 55 65X900E DISASSEMBLY 1 23 SLIDE CLAMP 1 XBR 55X900E 81 SLIDE CLAMP SLIDE CLAMP ...
Page 82: ...XBR 55 65X900E DISASSEMBLY 1 24 BRACKET SIDE SBT 1 XBR 55X900E 82 1 3 2 BRACKET SIDE SBT ...
Page 97: ...XBR 55 65X900E DISASSEMBLY 1 38 LD35 1 XBR 55X900E 97 1 2 LD35 ...
Page 104: ...XBR 55 65X900E DISASSEMBLY 2 8 TAPE 2 XBR 65X900E 104 1 NOTE 2 3 TAPE TAPE TAPE ...
Page 109: ...XBR 55 65X900E DISASSEMBLY 2 13 WIRE DRESSING 2 XBR 65X900E 109 1 3 4 2 ...
Page 117: ...XBR 55 65X900E DISASSEMBLY 2 21 TAPE 2 XBR 65X900E 117 1 NOTE 2 3 4 TAPE TAPE TAPE TAPE ...
Page 119: ...XBR 55 65X900E DISASSEMBLY 2 23 SLIDE CLAMP 2 XBR 65X900E 119 SLIDE CLAMP SLIDE CLAMP ...
Page 120: ...XBR 55 65X900E DISASSEMBLY 2 24 BRACKET SIDE SBT 2 XBR 65X900E 120 1 3 2 BRACKET SIDE SBT ...
Page 134: ...XBR 55 65X900E DISASSEMBLY 2 37 LD45 2 XBR 65X900E 134 1 1 2 LD45 ...
Page 135: ...XBR 55 65X900E DISASSEMBLY 3 1 COVER TOP FRE 3 SMART CORE S COVER TOP FRE 1 3 2 135 Hook ...