Sony XR-65X95K Service Manual page 52

2022/03/30 00:15:03 (GMT+09:00)
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
Enable to broadcast channel?
OK
Digital
Analog
For TW, NA-ATSC(MX/UC)
CH/HK, LA, PA, AEP
Refer Analog Tuning
SAFETY NOTES
NG
Change RF cable and
antenna
NG
Please refer DDCON
troubleshooting
Check part mounting condition
NG
for I2C SDA & SCL line.
(Refer Note I2C)
OK
Terrestrial/Cable
,
*1
For JP, US ATSC 3.0,
and Philippines
Refer Digital Tuning 1
SELF DIAGNOSIS FUNCTION TROUBLESHOOTING
Change NG parts
connected to I2C bus
NG
Satellite
NG
Check LNB power line
12V at C3028 = 12V?
OK
12V LNB Voltage
Checking
Refer Digital Tuning 2
SERVICE ADJUSTMENT
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
DIAGRAM HANDLING GUIDE
52
SYS SET