Sony BRAVIA KDL-55W900A, Service Manual

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RB1G
CHASSIS
W900A/904A/905A
Troubleshooting
3-5. No Picture
3-5-8. NO PICTURE: @ Tuner COL-T2 / BRZ / ARG
No Picture
Noisy Picture
Yes Digital only Analog only
Which is NG?
Analog RF or Digital RF
Both
Sound is normal ?
Check IC9001(Brownie)/
IC9001(Ayu2)
Yes
Confirm ANT connection
Digital only Analog only
OK
No sound
Error free
Confirm BER of digital RF
By Service mode
Check Brownie and
M’t condition in TS line
Connect ANT Cable
correctly
NG
Confirm Power supply
for Digital Demod
DDEM1.1V / DDEM3.3V
OK
Check Power supply
circuit
NG
By Service mode M t condition in TS line
NG
RF Level=High RF Level =Low
Which is NG?
Terrestrial or Cable
Both
Check IC2121
Either
Confirm Power supply
for RF input circuit
A2.5V / LNA_5V
Confirm RF Level and AGC
of Analog RF by Service mode
Check IC9001
(Brownie)
Confirm tuner control line
TU_SCL / TU_SDA
OK
Check Power supply
circuit
Check M’t condition
in t ner control line
NG
NG
AGC = 0
Confirm Demod control line
I2CB_SCL / I2CB_SDA
DMD_RESET / OSC_ENBN-1
OK
Check M’t condition
in Demod control line
Check M’t condition
in AGC2/IF2 line
NG
Confirm RF Level and AGC
of Digital RF by Service mode
AGC=Low AGC=High
AGC=High,
L
Confirm AGC1
A_RESET
Confirm IF1 line
IFOUTP1 / IFOUTN1
OK
OK
in tuner control line
Check M’t condition
in IF1 line
NG
in AGC2/IF2 line
Check IC2201
of Digital RF by Service mode
AGC=Low
IC2151 Pin6
Check M’t condition
in AGC1 line
Input signal is too big
Set LNA off
H
Si B* B d T G* B d
Check RF input circuit
include IC2151
Note:
Size B* Board Type G* Board
Type
OTHERS JP
40” BA2-S BA2-W G1A
46” BA2 S BA2 W G1A
157
Note:
(AYU2) – IC9000
(Brownie)- IC9001
46” BA2-S BA2-W G1A
55” BA2-S BA2-W G1B