Sony KDL-46W700A / KDL-46W704A / KDL-46W705A / KDL-46W707A / KDL-50W700A / KDL-50W704A / KDL-50W705A / KDL-50W707A Service Manual ▷ View online
RB1G
CHASSIS
W700A/704A/705A/707A/708A
Troubleshooting
AYU2 Fail Suspected
3-1-3. No POWER: Ayu2 Failure
AYU2 is working,
but specific block fails;
like no picture,
I/O damage etc
Yes
See AYU2
replacement flow
I/O damage, etc
No
Y
Store Error
message.
N
Find Some
Error message
R
NAND d t f il
AYU2 LOG is displayed
No
Yes
Yes
No
Check RawNAND
using CheckSW
No
If it is
unacceptable
Errors,
it is RawNAND
device failure
Check DDR
using CheckSW
Find Some
Error message
DDR d i
f il
No
Yes
RawNAND data fail
No
Store SW log,
Check SW behaviors.
AYU2 power is OK
Yes
Check
DDR & RawNAND
interface
device failure
Data fails are
especially in
environment area.
especially in
environment area.
If thi A
h
DDR device fail
Erase RawNAND
From the error
message, we can
find which device
has failure.
message, we can
find which device
has failure.
Software was written
Yes
No
If this Area has
broken, check soft
cannot run
broken, check soft
cannot run
In this case,
corrupted data are
written to NAND
flash in proper
corrupted data are
written to NAND
flash in proper
Erase RawNAND
has failure.
Move to device
analysis phase.
analysis phase.
Software was written
successful ly
at least one time
Replace both
AYU2 & RawNAND
No
es
way.
So, we have to
check the logs of
exception or errors.
check the logs of
exception or errors.
Erase RawNAND
Note:
29
Replace Ayu2
Erase RawNAND
is a last option.
is a last option.
Note:
(AYU2) – IC9000
(Brownie)- IC9001
(AYU2) – IC9000
(Brownie)- IC9001
RB1G
CHASSIS
W700A/704A/705A/707A/708A
Troubleshooting
AYU2
l
t fl
3-1-4. No POWER: Ayu2 Replacement
RawNAND erase
replacement flow
Product SW rewrite
Recover?
Product
SW
iti
i
Yes
Recover?
SW writing issue
No
RawNAND erase
AYU2 replacement
Product SW write
RawNAND replacement
Product SW write
Recover?
No
Product SW write
Recover?
AYU2 issue
RawNAND issue
Yes
Yes
No
Note:
30
Board issue
No
Note:
(AYU2) – IC9000
(Brownie)- IC9001
(AYU2) – IC9000
(Brownie)- IC9001
RB1G
CHASSIS
W700A/704A/705A/707A/708A
Troubleshooting
3-2. LED Blinking
3-2-1. LED BLINKING 3x (DC Alert, Audio Error & Communication Error)
3-2-1. LED BLINKING 3x (DC Alert, Audio Error & Communication Error)
Note:
(AYU2) – IC9000
(Brownie)- IC9001
(AYU2) – IC9000
(Brownie)- IC9001
(*)
Size
B* Board Type G* Board Type
46”
BA2-S GL2S
50”
BA2 S
GL2
3-time blinking
Ch k D 1 0V t
DC_ALERT
NG
DMD_TU_I2C
or
I2CB bus check:
I2C bus dumping or
TUNER
NG
50”
BA2-S
GL2
Check D+1.0V at
JL9129
on the B* Board
F9105,IC9103,etc
(B* Board)
Speaker
Check
Speaker Impedance
at SP Connector
NG
OK
AUDIO
NG
I2CB bus check:
Probe CL2205,
CL2206
I2C bus dumping or
AYU2
Brownie
OK
Check +3.3V_MAIN_1
at JL9116 on
the B* Board
F9102,IC9102,etc
(B* Board)
Check AUDIO+12.5V
at pin 8/10 of
G-board /
NG
NG
OK
SPIC check
Probe RB8522
SPI dumping
resistor
or AYU2
CN9101 on
the B* Board
Adapter (LW)
Check +12 5V
OK
OK
OK
I2C_CCP check
R8502 and
R8503
I2C_CCP Pull
U
Check +1.8V_MAIN on
IC9201,etc
NG
Check +12.5V
at Power Amp side
of F4601
on
the B* Board
F4601,IC4601,etc
(B* Board)
NG
OK
(Continue) #2
HDMI
R8503
OK
Up
Pin 2 of IC9201
,
(B* Board)
OK
IC4601,etc
(B* Board)
OK
(Continue) #3
I2CA bus check:
Probe CL5023,
CL5024
I2CA bus
dumping
resistor
or AYU2
NG
NG
Check +5V_MAIN
at JL9132 on
the B* Board
IC9101,etc
(B* Board)
31
OK
RB1G
CHASSIS
W700A/704A/705A/707A/708A
Troubleshooting
Troubleshooting Reference
Board Name
Board PWB (A side)
Detail
BA2-S/W
CL2151
CL2152
CL2152
CL2151
BM
CL2151
CL2151
CL2152
CL2152
CL2152
CL2151
32
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