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SAFETY NOTES SELF DIAGNOSIS FUNCTION TROUBLESHOOTING SERVICE ADJUSTMENT DIAGRAM HANDLING GUIDE
TROUBLESHOOTING
4.4 No Picture at Tuner
Notes: I2C
- Parts for I2C SDA line: R3036, C3005
- Parts for I2C SCL line : R3035, C3006
Waveform confirmation point
• I2C_TU_ SDA line: JL3013
• I2C_TU_SCL line : JL3012
*1 : Except US ATSC3.0, Please refer Digital Tuning 2
Notes: Demodulator
- Digital Tuning 1 : SoC inside demodulator
- Digital Tuning 2 : On board demodulator
RF input no picture / noisy picture
Change RF cable and antenna
Please refer DDCON
troubleshooting
OK
OK
NG
NG
Check RF source cable
and antenna, OK?
Check Tuner power line:
3.3V at JL3019 = 3.3V?
1.0V at FB3102=1.0V? (NA ATSC3.0, JP)
1.0V at FB3103=1.0V(PA ISDB)
All broadcasting channel
cannot be received?
OK
NG
Check part mounting condition
for I2C SDA & SCL line. (Refer Note I2C)
Change NG parts connected
to I2C bus
NG
OK
Analog
Refer Analog Tuning
Refer Digital Tuning 1
Digital
Check LNB power line
12V at C3028 = 12V?
Satellite
Refer Digital Tuning 2
NG
OK
12V LNB Voltage Checking
For TW, NA-ATSC(MX/UC)
*1
,
CH/HK, LA, PA, EU
For JP, NA ATSC 3.0,
and PA ISDB
Terrestrial/Cable
SYSSET
2022/04/1901:21:05(GMT+09:00)
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