No Picture - Sony RB1G 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
No Picture
Noisy Picture
Either one
Which is NG?
Both
Yes
Sound is normal ? Check Brownie/Ayu2
NO
Error free
Check Brownie/Ayu2
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
Check IC2308 (Main)
/ IC2309 (Sub)
Yes
Check IC9001(Brownie)/
Sound is normal ?
No sound
Error free
Check Brownie/Ayu2
Confirm BER of digital RF
By Service mode
M't condition in TS line
NG
Confirm Power supply
NG
Check Power supply
For Tuner and Digital Demod
LNA_5V / A2.5V /A2.5V_SAT/ DDEM3.3V
DDEM1.2V DDEM2.5V
OK
AGC = high
Check Tuner Module
and M't condition
Confirm RF Level using AGC
of Digital RF by Service mode in Main/Sub_AGC /
Main/Sub_IF line
AGC = Low
Check IC2308 (Main)
/ IC2309 (Sub)
<Hydra5>
Note:
(AYU2) – IC9000
(Brownie)- IC9001
W600A/ W603A/ W605A/ W607A/ W650A/ W651A/ W653A/
W654A/ W655A/ W656A/W657A/ W658A/ W670A/ W674A
IC9001(Ayu2)
and
circuit
Size B* Board Type
(Segment: LW)
OTHERS EUROPE
32" BKX BKE
42" BKX BKE
RB1G CHASSIS
JP
BKJ
BKJ
172