Sony XBR-43X830C / XBR-49X830C / XBR-49X835C / XBR-49X837C / XBR-49X839C Service Manual ▷ View online
XBR-43X830C, 49X830C, 835C, 837C, 839C
93
TROUBLE SHOOTING
3-3-3. 3 Times Blinking (Audio Error)
Audio Error ?
LED 3x blinking
See other flow
No
Yes
Go to page
Power Off Checking
*1
Go to page
Power off Checking
*2
Replace B-K Harness
OK ?
Yes
No
Replace K-PWB
OK ?
Replace B-PWB
OK ?
Yes
No
Yes
Segment “XS”?
Yes
No
B-K harness NG
K-PWB NG
B-PWB NG
XBR-43X830C, 49X830C, 835C, 837C, 839C
94
TROUBLE SHOOTING
1) Power Off Checking*1
(1) K-PWB
PVDD-GND short ?
(See Note 2)
Power Off Check*1
Replace K-PWB
No
Measure the Speaker
impedance by multi-meter
Less than 3Ω ?
Yes
Confirm the speaker
harness
Cut or shorted
to the chassis ?
Replace Speaker
No
Yes
Replace Speaker Harness
No
Yes
Return to LED 3x blinking
or Power Off Checking*3
(2) K-PWB
LDO out short ?
(See Note 2)
(3) K-PWB
Fuse broken ?
(See Note 2)
No
Yes
No
Yes
Power Off Check*3
Segment “XS”?
(1) B-PWB
PVDD-GND short ?
(See Note 1)
Replace B-PWB
No
Yes
(2) B-PWB
LDO out short ?
(See Note 1)
(3) B-PWB
Fuse broken ?
(See Note 1)
No
Yes
No
Yes
Yes
No
(3) Fuse open check
Measure impedance of fuse F7700, F7702 5A (12.5V)
If fuse open → NG
(1) PVDD-GND short check
Measure impedance between PVDD and GND at C7706,
C7707.
If impedance is <100Ω → NG
(2) LDO out short check
Measure impedance between +3.3V and GND at C9130.
If impedance is <100Ω → NG
(3) Fuse open check
Measure impedance of fuse
F7702, F7704, F7705, F7701 5A (12.5V)
F7700 3.15A (DDC5V)
If fuse open → NG
(1) PVDD-GND short check
Measure impedance between PVDD and GND at C7722, C7762, C7782,
C7834.
If impedance is <100Ω → NG
(2) LDO out short check
(2) LDO out short check
Measure impedance between +3.3V and GND at
C7909.
If impedance is <100Ω → NG
Note 2:
Note 1:
XBR-43X830C, 49X830C, 835C, 837C, 839C
95
TROUBLE SHOOTING
2) Power Off Checking*2
(4) 12.5V check BMFL / BMFW
Measure voltage between PVDD and GND at
capacitor C7706 or C7707.(See 3.3)
Voltage rise more than 0V for a moment at
power on
→ Yes
(5) 12.5V check KS-PWB (XS)
Measure voltage between PVDD and GND at
capacitor C7722, C7762, C7782 or C7834. (See
3.3)
Voltage rise more than 0V for a moment at
power on
→ Yes
(5) 12.5V check
12.5V is supplied to
K-PWB for a moment
before LED 3x brinking ?
Power Off Check*2
No
Replace G-K Harness
OK ?
Yes
Replace G-PWB
OK ?
No
Yes
No
Yes
Return to
LED 3x blinking
Finish
Segment “XS”?
Yes
No
(4) 12.5V check
12.5V is supplied to
B-PWB for a moment
before LED 3x brinking ?
No
Replace B-K Harness
OK ?
Yes
Replace G-PWB
OK ?
No
Yes
No
Yes
Return to
LED 3x blinking
Finish
XBR-43X830C, 49X830C, 835C, 837C, 839C
96
TROUBLE SHOOTING
3) Power Off Checking*3
No Sound
Without LED 3x
No
No sound only
Analog RF and Digital RF ?
Yes
No
No sound only HDMI ? Yes
No
No
Headphone is connected to
HP/Audio Out terminal ?
Disconnect the Headphone
Go to
Power Off Checking*1
Yes
No
Go to
No Sound Tuner
Go to
No Sound HDMI
Go to
No Sound Audio
[Sound]→
[Headphone Speaker Link]
setting is [On] ?
Change [Sound]→
[Headphone Speaker Link]
to [Off], OK ?
Replace B-PWB
Yes
No
HP/Audio out terminal or Headphone detect
GPIO may be broken
AV receiver is connected
to HDMI in ?
Yes
Select [External Inputs]→
[BRAVIA Sync Settings]→
[BRAVIA Sync Control]→[off]
[Speakers] setting is
[Audio System] ?
Change the setting to
[TV Speakers]
Yes
Yes
No
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