Sony XBR-43X830C / XBR-49X830C / XBR-49X835C / XBR-49X837C / XBR-49X839C Service Manual ▷ View online
XBR-43X830C, 49X830C, 835C, 837C, 839C
121
TROUBLE SHOOTING
3-5-17. NO CHARGE: MHL (BMX)
No Charge
STBY
Low (< 2V)
Check DDCCLK,
at CL5256
Check RB5219 (47k )
Replace
RB5219
Change
MHL cable
OK
High
Replace IC1000 (SoC).
Check D5205, D5206
Replace
D5205, D5206
NG (Open)
The TV Power Status?
“MHL Charge During STBY”
(UI) Status?
Off
Change “MHL Charge During STBY” (UI) to “On”
CN5202 #18 pin
TV On
5V
Change MHL Cable
0V
Check voltage at
CD_SENSE_0,
R5509
NG (Open)
Low (< 2V)
High
Check IC5208 #6
(VBUS IC, Out)
Check IC5208 #3
(VBUS IC, EN)
0V
0V
Replace IC1000 (SoC).
Replace IC5208 (VBUS IC)
5V
OK
XBR-43X830C, 49X830C, 835C, 837C, 839C
122
TROUBLE SHOOTING
3-6. SIDE BUTTONS MALFUNCTION
Side Key button
malfunction
Harness on Switch Unit
and B* Board properly connected
Change
Switch unit-B* board Harness
Harness
connection
issue
Change B*Board
Change Switch Unit
Switch unit issue
Harness issue
OK
NG
NG
OK
OK
Power Key (B*Board)
Check parts value :
0 ohm < R1089 < 2 ohm
4.4k ohm < R1432 < 5k ohm
Muffin IC1000
problem
NG
Power Key Muffin Pin (B*Board)
Check voltage(Power ON condition) :
3.13V < Voltage < 3.47V
NG
OK
NG
Key AD(B*Board)
Check parts value :
0 ohm < R1091 < 2 ohm
0 ohm < R1042 < 2 ohm
NG
OK
Parts Broken issue
Key AD muffin pin (B*Board)
Check voltage (Power ON condition):
1.62V < voltage < 1.84V
NG
OK
OK
NG
XBR-43X830C, 49X830C, 835C, 837C, 839C
123
TROUBLE SHOOTING
Harness on H-board
and B* Board
properly connected
B*Board
Check parts value :
R1080 = zero ohm
Check whether center
white LED blink ,when using
commander near the sensor
windows
SIRCS (IC1000 Pin Y35 , B*Board)
Check voltage (Power ON condition):
3.287V < Voltage < 3.55V?
IR do not response to
Remote Commander
Remote control battery
could be weak.
Change battery.
Center white LED
lit up when remote
control is pressed
Change
H-B* board Harness
H-B* board harness
issue
Harness
connection
issue
Change Smart Core
OK
Smart core issue
NG
OK
OK
NG
NG
NG
OK
OK
NG
Change B*Board
Muffin IC1000
problem
OK
NG
Parts Broken issue
OK
3-7. IR REMOTE COMMANDER MALFUNCTION
XBR-43X830C, 49X830C, 835C, 837C, 839C
124
TROUBLE SHOOTING
LIGTH_SENSOR (Muffin Pin L35)
Check voltage variation from
room light to dark condition
B*Board
Check LIGTH_SENSOR signal path :
R1079 = zero ohm
Backlight doesn’t change
when ambient lighting
level changed
Check UI setting for light
Sensor. Make sure it is “on”
Change the UI setting
to “ON”
OK
Harness on H-board and
B* Board properly connected
Harness connection
issue
NG
User did not activate light
sensor function
OK
Change
H-B* board Harness
NG
OK
Change Smart Core
OK
NG
NG
H-B* board harness
issue
Smart Core issue
NG
Change B*Board
Muffin IC1000 problem
OK
OK
NG
Part broken issue
3-8. LIGHT SENSOR ERROR
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