XBR-55X850D/855D/857D, 65X850D/855D/857D, 75X850D/855D/857D
39
TROUBLE SHOOTING
FLOW
3-2. NO SOUND (AUDIO)
No Sound
Audio
Replace B Board
Finish
Power Off Check
From 2-2
Measure the Speaker
impedance by multi-meter
Less than 3Ω ?
Confirm the speaker
harness
Cut or shorted
to the chassis ?
Replace Speaker
No
Yes
Replace Speaker Harness
No
Yes
Return to 2-2 or 3-1
Power Off Check
From 3-1
(1) B / DPS Board
PVDD-GND short ?
Replace B Board
No
Yes
(2) B / DPS Board
LDO out short ?
(3) B / DPS Board
Fuse broken ?
No
Yes
No
Yes
3-3. NO SOUND (POWER OFF CHECK)
(3) Fuse open check
Measure impedance of fuse
F7702 5A (12.5V or 19.5V)
If fuse open NG
(1) PVDD-GND short check
Measure impedance between PVDD and GND at
capacitor C7881.
If impedance is <100Ω NG
(2) LDO out short check
Measure impedance b3.3V and GND at C7880.
If impedance is <100Ω NG
BMFW2 Board
(3) Fuse open check
Measure impedance of fuse
F7700, F7701 5A (12.5V or 19.5V)
If fuse open NG
(1) PVDD-GND short check
Measure impedance between PVDD and GND at
capacitor C7932, C7914.
If impedance is <100Ω NG
(2) LDO out short check
Measure impedance b3.3V and GND at C7913,
C7931.
If impedance is <100Ω NG
DPS Board
Содержание Bravia XBR-55X857D
Страница 134: ...XBR 55X850D 855D 857D 65X850D 855D 857D 75X850D 855D 857D 134 DISASSEMBLY 3 4 HSC4 S 3 SMART CORE S HSC4 S 1 3 2 NOTE ...
Страница 174: ...XBR 55X850D 855D 857D 65X850D 855D 857D 75X850D 855D 857D 174 DISASSEMBLY 5 3 COVER TOP 5 SMART CORE M COVER TOP 1 3 2 ...
Страница 175: ...XBR 55X850D 855D 857D 65X850D 855D 857D 75X850D 855D 857D 175 DISASSEMBLY 5 4 HSC4 M 5 SMART CORE M HSC4 M 1 3 2 NOTE ...