Sony RB1G Service Manual page 419

Troubleshooting
3-5. No Picture
3-5-7. NO PICTURE: @ Tuner AEP-T2 / PA-T2 / CH / HK / AEP-T2C2S2(Terrestrial part)
NG
Confirm TV system
Set correct TV system
with manual tuning menu
manually
(B/G,D/K,I,L,M)
RF Level =
High
Check IC9001 Confirm RF Level and AGC
(Brownie) of Analog RF by Service mode
AGC = 0
L
Check M't condition Input signal is too big
in AGC1 line
OK
RF Level =
Low
Confirm Power supply
for RF input circuit
A2.5V / LNA_5V
OK
Confirm tuner control line
Confirm AGC1
TU_SCL / TU_SDA
IC2151 Pin6
A_RESET
OK
H
Confirm IF1 line
IFOUTP1 / IFOUTN1
Set LNA off
OK
Check RF input circuit
include IC2151
No Picture
Noisy Picture
Analog only Digital only
Which is NG?
Analog RF or Digital RF
Both
OK
Confirm ANT connection
NG
Connect ANT Cable
correctly DDEM1.2V (CH/HK) / DDEM1.1V (AEP-T2/PA-T2) /
NG
Check Power supply
circuit
NG
Check M't condition
in tuner control line
NG
Check M't condition
in IF1 line
W600A/ W603A/ W605A/ W607A/ W650A/ W651A/ W653A/
W654A/ W655A/ W656A/W657A/ W658A/ W670A/ W674A
Yes
Check IC9001(Brownie)/
Sound is normal ?
No sound
Error free
Confirm BER of digital RF
(Brownie) and M't
By Service mode
condition in TS line
NG
Confirm Power supply
NG
for Digital Demod Check Power supply
DDEM3.3V
OK
NG
Confirm Demod control line
Check M't condition
I2CB_SCL / I2CB_SDA
in Demod control line
DMD_RESET / OSC_ENBN-1
OK
AGC = high
Confirm RF Level and AGC Check M't condition
of Digital RF by Service mode in AGC2/IF2 line
AGC = Low
Check IC2201
Size
OTHERS
24" BLX
32" BKX/BLX
Note:
42" BKX/BLX
(AYU2L) – IC9000
50" BLX
(Brownie)- IC9001
RB1G CHASSIS
IC9001(Ayu2)
Check IC9001
circuit
B* Board Type
(Segment: LW)
EUROPE JP
BLE BLJ
BKE/BLE BKJ/BLJ
BKE/BLE BKJ/BLJ
BLE -
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