Sony XR-55A95K Service Manual page 51

TROUBLESHOOTING
4.4 No Picture at Tuner- FOR DIGITAL TUNING 2 at US ATSC3.0 and Philippines
NG
Check part
mounting condition
for I2C SDA & SCL line.
NG
(Refer Note I2C)
OK for X_DEMOD_RST_STBY line.
Change Tuner module
Change NG
parts
Digital Tuning 2
For US ATSC3.0
and Philippines
Sound is normal?
OK
No sound
Can it preset
Digital broadcast? OK
NG
Can it preset
Analog broadcast?
OK
Check part
mounting condition
NG
(Refer Note RST)
OK
Check the status of IC3101
peripheral components
NG
Confirm ANT or
A
Satellite connection
OK
IC1000 (SoC)
defects
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, R3040, C3005
- Parts for I2C SCL line : R3035, R3039, C3006
Waveform confirmation point
• I2C_TU_SDA line: JL3013
• I2C_TU_SCL line : JL3012
Notes: TS line
-TS line parts for US ATSC3.0/Philippines
R3114/R3116/R3117/R3120/R3121/R3122/R3123/RB3001
- TS line parts for JP :
R3113/R3114/R3116/R3117/R3120/R3121/R3122/R3123/
R3027/RB3001
A : Insert correct signal in correct ANT terminal.
OK
IC1000 (SoC)
defects
Notes: RST
- Parts for X_DEMOD_RST line:
R3109, C3117
Voltage confirmation point
C3117 = 3.3V
51
SYS SET