No Picture: Tuner Jpn - Sony KDL-40W900A Service Manual

Troubleshooting
3-5. No Picture
3-5-10. NO PICTURE: @ Tuner JPN (Digital only)
Noisy Picture Noisy Picture
Satellite RF or Terrestrial RF
Confirm BER of digital RF
I2CB_SCL / SDA, MAIN_I2C_SCL/SDA
DMD_RESET1 / DMD_CLK_ENABLE1
Confirm RF Level using AGC
of Digital RF by Service mode
AGC = Low
Check IC2308 (Main)
No Picture
Either one
Which is NG?
Both Both
Yes
Sound is normal ? Check Brownie/Ayu2
NO
Error free
Check Brownie/Ayu2
g
and
By Service mode
M't condition in TS line
NG
NG
Confirm Power supply
Check Power supply
for Digital Demod
DDEM1.2V / DDEM2.5V
circuit
DDEM3.3V
OK
NG
Confirm Demod control line
Check M't condition
in Demod control line
X_SYSTEM_RST
OK
AGC = high
Check Tuner Module
and LNA_5V
/ IC2309 (Sub)
Sound is normal ?
No sound
Confirm BER of digital RF
By Service mode
NG
Confirm Power supply
For Tuner and Digital Demod For Tuner and Digital Demod
d
LNA_5V / A2.5V /A2.5V_SAT/ DDEM3.3V
DDEM1.2V DDEM2.5V
OK
Confirm RF Level using AGC
of Digital RF by Service mode
AGC = Low
Check IC2308 (Main)
/ IC2309 (Sub)
<Hydra5>
Yes
Check IC9001(Brownie)/
IC9001(Ayu2)
Error free
Check Brownie/Ayu2
and
M't condition in TS line
NG
Check Power supply Check Power supply
circuit
AGC = high
Check Tuner Module
and M't condition
in Main/Sub_AGC /
Main/Sub IF line _
Size Si B* Board Type B* B
OTHERS
40" BA2-S
Note: Note:
46" 46" BA2-S BA2 S
(AYU2) – IC9000
55" BA2-S
(Brownie)- IC9001
RB1G CHASSIS
W900A/904A/905A
d T G* Board G* B d
Type
JP
BA2-W G1A
BA2-W BA2 W G1A G1A
BA2-W G1B
171