Sony Bravia KDL-42W800A, Service Manual, Page: 143 / 238

RB1G CHASSIS
W800A/W801A/W802A/W804A/W805A/W806A/W807A/W808A/W809A
Troubleshooting
3-5. No Picture
3-5-7. NO PICTURE: @ Tuner AEP-T2 / PA-T2 / CH / HK / AEP-T2C2S2(Terrestrial part)
No Picture
Noisy Picture
Yes Digital only
Confirm TV system
Analog only NG
Which is NG?
Analog RF or Digital RF
Both
Sound is normal ?
Check IC9001(Brownie)/
IC9001(Ayu2)
Yes
Confirm ANT connection
Digital only
Confirm TV system
with manual tuning menu
(B/G,D/K,I,L,M)
Analog only
OK
Set correct TV system
manually
OK
NG
No sound
Error free
Confirm BER of digital RF
By Service mode
Check IC9001
(Brownie) and M’t
condition in TS line
Connect ANT Cable
correctly
NG
NG
Confirm Power supply
for Digital Demod
DDEM1.2V (CH/HK) / DDEM1.1V (AEP-T2/PA-T2) /
DDEM3.3V
OK
Check Power supply
circuit
NG
NG
condition in TS line
NG
RF Level =
Hi h
RF Level =
L
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
A RESET
L
OK
Check Power supply
circuit
Check M’t condition
in tuner 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
High Low
AGC = high
Confirm AGC1
IC2151 Pin6
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
Check RF input circuit
include IC2151
Size
B* Board Type G* Board Type
OTHERS JAPAN CHINA ASIA AMERICA EUROPE JAPAN
42 BA2S BA2W GL2S GL2S GL2E(CH) GL2E(ID) GL2S
143
Note:
(AYU2) – IC9000
(Brownie)- IC9001
47 BA2S BA2W GL2S GL2S GL2E(CH) GL2E(ID) GL2S
55 BA2S BA2W GL2E(CH) GL2E(ID) GL2E(CH) GL2E(ID) GL2E(ID)