Sony KDL-60W840B / KDL-60W850B / KDL-60W855B / KDL-60W857B / KDL-70W830B / KDL-70W840B / KDL-70W850B / KDL-70W855B / KDL-70W856B / KDL-70W857B Service Manual ▷ View online
Chassis: RB2G, HE-H
Chassis: RB2G, HE-H
53
RB2G
CHASSIS
W850B
C 0 3
C 0 2
C5073
C5072
C5059
BAXL
BAXL--A Side
A Side
BAXL
BAXL--A Side
A Side
R5071
C5071
Trouble Shooting Reference
BAX-L Board (Side A)
Chassis: RB2G, HE-H
Chassis: RB2G, HE-H
54
RB2G
CHASSIS
W850B
Troubleshooting
3-4. RB2 Analog Signal Path
g
g
2.4 - RB2 Analog Signal Path
Chassis: RB2G, HE-H
Chassis: RB2G, HE-H
55
RB2G
CHASSIS
W850B
3-5-3. No Picture UC/GA/CH (BAX +TUS UC/GA/CH)
No Picture GA
Video 1
No Picture
Video 2
No Picture
Check if input OSD
Component
No Picture
NG
Check
J3104
Conn
VIDEOB DET at
Ch
k if i
t OSD
Check
J3104
Connection,
NG
Ch
k if i
OSD
Check
J3101
ti
NG
Check wave
Detailed check
NG
OK
Check if input OSD
is GREY OUT
VIDEOB_DET at
C8025
/
C7026
,
CR_DET at
C8014
/
C7025
Check wave between
Detailed check
NG
Check if input OSD
is GREY OUT
VIDEOB_DET
At
C8025
/
C7026
OK
Check wave between
Detailed check
NG
Check if input OSD
is GREY OUT
connection,
VIDEOA_DET at
C8031
/
C7030
OK
HDMI EQ [IC5009]
NG
OK
Between C3018/C3019
and IC9001
Detailed check
J3104 signal path
Confirm HDMI
OK
Check wave between
C3018 and IC9001
Detailed check
J3104 signal path
Detailed SDIF path
Check between
OK
Check wave between
C3000 and IC9001
Detailed check
J3101
signal path
Detailed SDIF path
Check between
Problem
input working
OK
Detailed TMDS path
check between
Confirm Analog RF
input working
NG
Check between
IC9001 and IC9000
Check signal
between IC9001 and
IC9000 [
RB8524
] /
NG
NG
Confirm Analog RF
i
t
ki
NG
Check between
IC9001 and IC9000
Check signal
between IC9001 and
IC9000 [
RB8524
] /
IC9001 and IC5009
Confirm other analog
Input working
NG
Check signal
between IC9001 and
IC5009 [RB5008]
NG
OK
input working
IC9000 [
RB8524
] /
[
R8570
]
Ayu2 [IC9000]
Problem
OK
Brownie [IC9001]
Problem
OK
input working
IC9000 [
RB8524
] /
[
R8570
]
Ayu2 [IC9000]
Problem
OK
Brownie [IC9001]
Problem
Ayu2 [IC9000]
Problem
OK
IC5009 [RB5008]
Brownie [IC9001]
Problem
OK
Problem
LEGEND
BAX
BAX-L
BAX & BAX-L
Note:
TUS/TUW
(AYU2(BAX)/
Ayu2L(BAXL
) – IC9000
(Brownie)- IC9001
2.5 - No Picture: BAX + TUS
Chassis: RB2G, HE-H
Chassis: RB2G, HE-H
56
RB2G
CHASSIS
W850B
3-5-5 NO PICTURE: HDMI
3 5 5. NO PICTURE: HDMI
No Picture
Check the below point at
For example, Only
HDMI 4 is NG
HDMI 4 is NG
Check other
HDMI input
Other Input is OK
Check the below point at
IC5009 side
・Check +5V line
・Check HPD line
・Check DDC lines
All lines
are NG
Replace
CN5002
All Inputs
are NG
Check Picture by other TV set
which is same model
Check DDC lines
・Check TMDS lines
Only +5V line
is NG
R
l
+5V line is OK
and HPD line
Only TMDS lines
Other TV set
OK
Check IC5009 All power
Supply pin
Target board & other TV set
both NG
which is same model
Replace
R5105
is NG
are NG
Is Distributor used ?
YES
(Refer to next page)
Replace
IC5009
Only DDC lines
are NG
Replace
Replace
NO
YES
Connect Source
equipment directly
Check Source equipment
by Reference TV set
(For example, RB1)
IC5009
Replace
RB5016
RB5005 and RB5006
Reference TV Set OK
Reference TV set
NG
Inform the designer
of it
Check the settings of
Source equipment
2.5-1 - No Picture: HDMI
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