Sony BRAVIA KDL-55W900A, Service Manual

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