Sony XBR-55X900H Service Manual page 57

2021/04/27 23:25:57 (GMT+09:00)
4.4 No Picture Tuner
RF input no picture / noisy picture
Check RF source cable
and antenna, OK?
Check Tuner power line:
3.3V at JL3035 = 3.3V?
All broadcasting channel
cannot be received?
Analog
Refer Analog Tuning
SAFETY NOTES
NG
OK
NG
OK
NG for I2C SDA & SCL line. (Refer Note I2C)
OK
Digital
Terrestrial/Cable
For TW, NA-ATSC(MX/UC)
CH/HK, LA, PA
Refer Digital Tuning 1
SELF DIAGNOSTIC FUNCTION TROUBLESHOOTING
T R O U B L E S H O O T I N G
Change RF cable and antenna
Please refer DDCON
troubleshooting
Check part mounting condition
OK
Satellite
Check LNB power line
12V at C3217 = 12V?
*1 For AEP, JP, US ATSC 3.0,
,
and Philippines
Refer Digital Tuning 2
SERVICE ADJUSTMENT
Notes: I2C
- Parts for I2C SDA line: R3066, C3063
- Parts for I2C SCL line : R3065, C3062
Waveform confirmation point
• I2C_TU_ SDA line: JL3036
• I2C_TU_SCL line : JL3037
Notes: Demodulator
- Digital Tuning 1 : SoC inside demodulator
- Digital Tuning 2 : On board demodulator
*1 : Except US ATSC3.0, Please refer Digital Tuning 2
Change NG parts connected to
NG
I2C bus
NG
OK
12V LNB Voltage Checking
DIAGRAM
57
HANDLING GUIDE
SYS SET