Sony XBR-49X835D Service Manual page 41

FLOW
4-3. NO PICTURE (TUNER)
RF input no picture / noisy picture
Check RF source cable
and antenna, OK?
OK
Check Tuner power line:
3.3V at JL2800 = 3.3V?
1.8V at JL2801 = 1.8V?
DEM_3.3V at JL2830 = 3.3V? (BM2 only)
A_RESET value at JL2807 = 3.3V?
For JP_SK only – TU1.1 V (Refer notes)
OK
All broadcasting channel
cannot be received?
NO
Refer to next page
XBR-49X835D
NG
Change RF cable and antenna
NG
Please refer DDCON troubleshooting
Check part mounting condition
YES
for I2C SDA & SCL line (Refer Note I2C)
And
Check Tuner module connection (BFM)
OK
TROUBLE SHOOTING
NG
Change NG parts connected to
I2C bus
Notes:
I2C line for all tuners except Japan_SKP
- Parts for I2C SDA line: R2800, C2803.
- Parts for I2C SCL line : R2801, C2804.
I2C line for Japan_SKP
- Parts for I2C SDA line: R2804
- Parts for I2C SCL line : R2805
TU_1.1V line only in BM2 Japan_SKP Tuner
- Parts for TU_1.1V : FB2806
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