Sony XBR-55X900H Service Manual page 66

2020/06/27 06:31:32 (GMT+09:00)
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 JL3035 = 3.3V?
OK
All broadcasting channel
cannot be received?
OK
Digital
Analog
Refer Analog Tuning
SECTION 1
S E C T I O N 3
T R O U B L E S H O O T I N G
Change RF cable and antenna
NG
Please refer DDCON
NG troubleshooting
Check part mounting condition
NG for I2C SDA & SCL line. (Refer Note I2C)
Terrestrial/Cable
For TW, NA-ATSC(MX/UC) *1 ,
CH/HK, LA, PA
Refer Digital Tuning 1
SECTION 2 SECTION 3
NG
OK
Satellite
Check LNB power line
12V at C3217 = 12V?
OK
For AEP, JP, US ATSC 3.0,
and Philippines
Refer Digital Tuning 2
SECTION 4 SECTION 5
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 I2C
bus
NG
12V LNB Voltage Checking
SECTION 6
66
SYS SET