No Picture: Tuner Aep-T2/ Pa-T2/ Ch/ Hk/ Aep-T2C2S2 - Sony KDL-40W900A Service Manual
Rb1g chassis
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Also See for KDL-40W900A:
- Operating instructions manual (60 pages) ,
- Operating instructions manual (32 pages) ,
- Operating instructions manual (36 pages)
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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
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
in AGC1 line
(B/G,D/K,I,L,M)
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
IFOUTP1 / IFOUTN1
Set LNA off
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
OK
Confirm ANT connection
NG
Connect ANT Cable
DDEM1.2V (CH/HK) / DDEM1.1V (AEP-T2/PA-T2) /
correctly
NG
Check Power supply
circuit
NG
Check M't condition
in tuner control line
NG
Check M't condition
in IF1 line
in IF1 line
Size
B* Board Type
OTHERS
40
40"
BA2 S
BA2-S
Note:
46"
BA2-S
(AYU2) – IC9000
(Brownie)- IC9001
55"
BA2-S
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
Check Power supply
for Digital Demod
DDEM3 3V
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
RB1G
CHASSIS
W900A/904A/905A
G* Board
Type
JP
BA2-W
BA2 W
G1A
G1A
BA2-W
G1A
BA2-W
G1B
IC9001(Ayu2)
Check IC9001
circuit
147
- Quick Links:
- Standby Led Error Display
- Led Blinking
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Table of Contents
Troubleshooting
