Sony KD-43X85K Service Manual page 69

TROUBLESHOOTING
FOR DIGITAL TUNING For US ATSC3.0 and Philippines
4.4 No Picture at Tuner -
Check part mounting condition
for I2C SDA & SCL line.
(Refer Note I2C)
NG
OK
Change Tuner module
Change NG parts
Digital Tuning 2
For NA ATSC3.0
and PA ISDB
Sound is normal?
OK
No sound
Can it preset
Digital broadcast?
OK
NG
Can it preset
Analog broadcast?
NG
OK
Check part mounting condition
for X_DEMOD_RST_STBY line.
(Refer Note RST) NG
OK
Check the status of IC3001 peripheral
components (UC ATSC 3.0)
OK
Replace main
board
Check part mounting condition for digital data line
"TU1_TS_DATA0, TU1_TS_CLK,
TU1_TS_VALID, TU1_TS_SYNC,
(Refer Notes: TS line)
NG
Change NG parts
Change NG parts
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
Notes: TS line
-TS line parts for NA ATSC3.0/PA ISDB
R3120/R3121/ R3122/ R3123/ R3114/ C3126/ R3116/R3117/RB3001
OK
Replace main
board
Notes: RST
- Parts for X_DEMOD_RST_STBY line:
R3109, C3117
Voltage confirmation point
C3117 = 3.3V
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SYS SET