Sony RB1G Service Manual page 448

Troubleshooting
3-5. No Picture
3-5-10. NO PICTURE: @ Tuner JPN (Digital only)
No Picture
Noisy Picture
Which is NG?
Satellite RF or Terrestrial RF
Both
Sound is normal ?
NO
Error free
Confirm BER of digital RF
By Service mode
NG
Confirm Power supply for Digital
Demod DDEM1.2V / DDEM2.5V
DDEM3.3V
OK
Confirm Demod control line
I2CB_SCL / SDA, MAIN_I2C_SCL/SDA
DMD_RESET1 / DMD_CLK_ENABLE1
X_SYSTEM_RST
OK
AGC = high
Confirm RF Level using AGC
of Digital RF by Service mode
AGC = Low
Check IC2308 (Main)
/ IC2309 (Sub)
Either one
Yes
Check Brownie/Ayu2
Check Brownie/Ayu2
and
M't condition in TS line
NG
Check Power supply
circuit
NG
Check M't condition
in Demod control line
Check Tuner Module
and LNA_5V
Sound is normal ?
No sound
Error free
Confirm BER of digital RF
By Service mode
NG
Confirm Power supply
For Tuner and Digital Demod
LNA_5V / A2.5V /A2.5V_SAT/ DDEM3.3V
DDEM1.2V DDEM2.5V
AGC = high
OK
Confirm RF Level using AGC
of Digital RF by Service mode
AGC = Low
Check IC2308 (Main)
/ IC2309 (Sub)
<Hydra5>
Note:
(AYU2L) – IC9000
(Brownie)- IC9001
W600A/ W603A/ W605A/ W607A/ W650A/ W651A/ W653A/
W654A/ W655A/ W656A/W657A/ W658A/ W670A/ W674A
Yes
Check IC9001(Brownie)/
IC9001(Ayu2)
Check Brownie/Ayu2
and
M't condition in TS line
NG
Check Power supply
circuit
Check Tuner Module
and M't condition
in Main/Sub_AGC /
Main/Sub_IF line
Size B* Board Type
(Segment: LW)
OTHERS EUROPE
24" BLX BLE
32" BKX/BLX BKE/BLE
42" BKX/BLX BKE/BLE
50" BLX BLE
RB1G CHASSIS
JP
BLJ
BKJ/BLJ
BKJ/BLJ
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448