Sony XR-65X95K Service Manual page 47

TROUBLESHOOTING
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 JL3019 = 3.3V?
OK
NG
Enable to broadcast channel?
OK
Digital
Terrestrial/Cable
Analog
For TW, NA-ATSC(MX/UC)
CH/HK, LA, PA
Refer Analog Tuning
NG
Change RF cable and
antenna
NG
Please refer DDCON
troubleshooting
Check part mounting condition
for I2C SDA & SCL line.
(Refer Note I2C)
OK
Check LNB power line
*1 ,
For JP, US ATSC 3.0,
and Philippines
Refer Digital Tuning 1
Change NG parts
connected to I2C bus
NG
Satellite
NG
12V at C3028 = 12V?
OK
12V LNB Voltage
Checking
Refer Digital Tuning 2
Notes: I2C
- Parts for I2C SDA line: R3036, R3040,
C3005
- Parts for I2C SCL line : R3035,
R3039, C3006
Waveform confirmation point
• I2C_TU_SDA line: JL3013
• I2C_TU_SCL line : JL3012
Notes: Demodulator
- Digital Tuning 1 : SoC inside
demodulator
- Digital Tuning 2 : On board
demodulator
*1 : Except US ATSC3.0, Please refer Digital Tuning 2
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SYS SET