- No Picture: Tuner - Sony KDL-32W700B Service Manual

Troubleshooting
RB2G CHASSIS
W700B/ W800B
2-5. No Picture 2-5 No Picture
2-5-7. Tuner UC / KR

2.5-3 - NO PICTURE: TUNER

Tuner
RF Level =
Check Brownie
Check M't condition
in AGC1 line
Chassis: RB2G, HE-L
Analog only
High RF Level = Low
Confirm RF Level and AGC
of Analog RF by Service mode
AGC = 0
L
Confirm AGC1
IC2501 Pin6
H
Input signal is too big
Insert Attenuator
No Picture
Noisy Picture
Digital only
Which is NG?
Analog RF or Digital RF
B th Both
OK
Confirm ANT connection
NG
Connect ANT Cable Connect ANT Cable
correctly
RF Level = Low
NG
Confirm Power supply
for RF input circuit
A2.5V / LNA_5V
OK
NG NG
Confirm tuner control line
TU_SCL / TU_SDA
A_RESET
OK
NG
Confirm IF1 line
IFOUTP1 / IFOUTN1 IFOUTP1 / IFOUTN1
OK
Check RF input circuit
include IC2501
Yes
Sound is normal ?
No sound N d
RF Level = High
Confirm RF Level and AGC
of Digital RF by Service mode
AGC = 0
Check Power supply
circuit
Check M't condition
in tuner control line
Check M't condition
in IF1 line in IF1 line
Chassis: RB2G, HE-L
Check IC9001(Brownie)/
IC9001(Ayu2)
Check Brownie
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