Sony KD-49X9 F Series Service Manual page 48

4.4 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?
RESET value at JL2807 = 3.3V?
OK
All broadcasting channel
cannot be received?
OK
Refer to next page
NG
NG
*1
*1
NG
Check part mounting condition
for I2C SDA & SCL line. (Refer Note I2C)
Change RF cable and antenna
Please refer DDCON
troubleshooting
NG
OK
Notes: I2C
I2C line for all tuners except Japan
- Parts for I2C SDA line: R2800, C2803.
- Parts for I2C SCL line : R2801, C2804.
I2C line for Japan
- Parts for I2C SDA line: R2804
- Parts for I2C SCL line : R2805
It does not use 1.8V and RESET in the UC model
*1
Change NG parts
connected to I2C bus
48