Sony A1E Series Service Manual page 35

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?
A_RESET value at JL2807 = 3.3V?
OK
All broadcasting channel
cannot be received?
NO
Digital
Analog
Refer Analog Tuning
XBR-55/65A1E
NG
Change RF cable and antenna
NG
Please refer DDCON
troubleshooting
Check part mounting condition
YES
for I2C SDA & SCL line. (Refer Note I2C)
Check Tuner module connection.(CN2800)
Terrestrial/Cable
Refer Digital Tuning 1
NG
And
OK
OK
Check Tuner power line
12V at JL2822 = 12V?
TROUBLE SHOOTING
Notes:
- Parts for I2C SDA line: R2800, C2803.
- Parts for I2C SCL line : R2801, C2804.
Change NG parts connected
to I2C bus
Satellite
NG
12V LNB Voltage Checking
35