Sony KD-49X7 D Series Service Manual page 52

2.2 LED Blinking: 3x (Audio Error)
LED 3x blinking
(Audio Error)
(1) B-PWB
VDD-GND short ?
No
Power Off
(2) B-PWB
Check
+3.3V_Audio short ?
No
(3) B-PWB
Fuse broken ?
No
(4) 12.5V check
12.5V is supplied to
Power On
Check B-PWB for a moment
before LED 3x blinking?
Yes
Replace B-K Harness
Replace*
Yes
B-PWB
Replace G-PWB*
Yes
TV Business Division
Yes
OK ?
No
Yes
OK ?
Finish
No
*For BFM chassis: if with AC adapter,
*For BM2+DPA chassis:
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Measure the Speaker
Yes
impedance by multi-meter
Less than 3Ω ?
No
Speaker Harness
G-PWB refer to LD board;
"Replace B-PWB" include BM2 and DPA;
Replace
Speaker
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