No Picture - Sony KDL-42W800A Service Manual

Troubleshooting

3-5. No Picture

3-5-10. NO PICTURE: @ Tuner JPN (Digital only)
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
Noisy Picture y
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>
Note:
(AYU2) – IC9000
(Brownie)- IC9001
W800A/W801A/W802A/W804A/W805A/W806A/W807A/W808A/W809A
Yes
Check IC9001(Brownie)/
IC9001(Ayu2)
Error free
Check Brownie/Ayu2
and
M't condition in TS line
NG 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 _
B* Board Type G* Board Type
Size
OTHERS JAPAN CHINA ASIA
42 BA2S BA2W GL2S GL2S
47 BA2S BA2W GL2S GL2S
55 BA2S BA2W GL2E(CH) GL2E(ID) GL2E(CH) GL2E(ID) GL2E(ID)
RB1G CHASSIS
AMERICA EUROPE JAPAN
GL2E(CH) GL2E(ID) GL2S
GL2E(CH) GL2E(ID) GL2S
167