DOWNLOAD Sony KDL-60W840B / KDL-60W850B / KDL-60W855B / KDL-60W857B / KDL-60W858B / KDL-70W830B / KDL-70W840B / KDL-70W850B / KDL-70W855B / KDL-70W856B / KDL-70W857B Service Manual ↓ Size: 4.61 MB | Pages: 48 in PDF or view online for FREE

Name: Sony KDL-60W840B / KDL-60W850B / KDL-60W855B / KDL-60W857B / KDL-60W858B / KDL-70W830B / KDL-70W840B / KDL-70W850B / KDL-70W855B / KDL-70W856B / KDL-70W857B
Brand: Sony
SKU: 15210
Rating: 4 (1 reviews)

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Model: KDL-60W840B KDL-60W850B KDL-60W855B KDL-60W857B KDL-60W858B KDL-70W830B KDL-70W840B KDL-70W850B KDL-70W855B KDL-70W856B KDL-70W857B
Pages: 48
Size: 4.61 MB
Type: PDF
Document: Service Manual
Brand: Sony
Device: TV / COMMON
File: kdl-60w840b-kdl-60w850b-kdl-60w855b-kdl-60w857b-kd.pdf
Date: 2018-11-20

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Sony KDL-60W840B / KDL-60W850B / KDL-60W855B / KDL-60W857B / KDL-60W858B / KDL-70W830B / KDL-70W840B / KDL-70W850B / KDL-70W855B / KDL-70W856B / KDL-70W857B Service Manual ▷ View online

RB2G
CHASSIS
W830B/ W840B/ W850B/  W855B
W856B/ W857B
Self Diagnostic Function
2 4 Standby LED Error Display
2-2 LED Display Control
Status
White Center 
LED
(applicable for 
HSC2 only)
Side RGB LED Side Amber 
LED
Remarks
Power Off
( by power saving switch off and *1)
Off
Off
Off
*1  power switch off (by side 
key) 
P
O
Whit
Off
Off
2-4. Standby LED Error Display
2-2. LED Display Control
Smart Core 
RED LED 
blinking 
count
Detection Items
Board Error Item
2
Main 12V failure [MAIN POWE]
 G2B Board Error
Power On
White
Off
Off
STBY/i.LINK STBY/PC STBY
( by remote control off only )
Off
Off
Off
Skype Call Receive
White
White one shot
Off
Picture Off
White looping
White one shot
Off
Device Connection
White
Cyan one shot
Off
2x
[
_
]
* This failure is not saved
G2B Board Error
 BAXL Board Error
Main 5.0/3.3/1.8/1.0/ 1.1V failure [DC_ALERT]
* 5.0/1.0V failures are not saved.
 BAXL Board Error
Audio amp. protection [AUD_ERR]
 BAXL Board Error
 Speaker
Power ON Animation
White
White one shot
Off
Sleep Timer/On 
Timer/Reminder/REC Timer/Photo 
Frame
( Power On )
White
Amber 
One shot -> Lit*2
Off
*2 One Shot is only user action.
On Timer/Reminder/REC Timer
( Deep Standby )
Off
Off
Amber
After 5 minutes, side amber 
LED On
3x
p
HDMI equalizer/switch I2C NACK [HDMI_EQ] * There 
is Temp. sensor on the same I2C bus.
 BAXL Board Error
Tuner or demodulator I2C NACK [TU_DEMOD]
 BAXL Board Error
AFE device I2C NACK [AFE_I2C]
 BAXL Board Error
( Deep Standby )
LED On
Failure
Off
Red 
Blinking
Off
The number of LED blinking 
indicates cause of failure
( refer to Led Error / Triage 
chart)
Aging mode
White
Green Blinking
Off
Blinking:0.5sec On / 0.5sec Off
End of Aging mode
White
Green Blinking
Off
Blinking:3sec On / 3sec Off
AFE device error SPI NACK [AFE_SPI] * only for 
AEP,CH
 BAXL Board Error
4x
LED driver failure [LD_ERR]
LED Driver (LD) Board Error
Panel module 
LED voltage error [VLED]]
LED Driver (LD) Board Error
g g
g
g
Software Updating
white blinking
white blinking
off
Software Updating finish
White
Blue lit
off
Test Reset 
White
white blinking
Amber 
blinking
Error of panel ID
White
Green Blinking
Amber
Blinking
Blinking:0.5sec On / 0.5sec Off
LED voltage error [VLED]]
(
)
Panel module 
5x
Panel ID EEPROM I2C NACK (Also panel power 
failure is a suspect) [P_ID_ERR]
 Panel module 
 Tcon board
G2SB Board Error
 BAXL Board Error
P
l
d l
REC (SCART REC & HDD 
REC/LIVE PAUSE) [AEP/J only]
White
Red(Pink) 
One shot -> Lit*2
Off
*2 One Shot is only user action.
ePOP/
Shop Illumination
White
Cyan loop
Off
When safety shutdown occurs, Standby LED display reports the cause by using the lightning
2-3. LED Pattern
6x
Backlight failure [BACKLIGHT]
Panel module 
 G** Board Error
 BAXL Board Error
Backlight converter OVP [BACKLIGHT]
Panel module 
 Tcon board
 G2B Board Error
 BAXL Board Error
patterns as indicated below
. 
3.0sec
3.0sec
0.5sec
 BAXL Board Error
7x
Over temperature protection [TEMP_ERR]
Temp. sensor I2C NACK [TEMP_ERR] * There is 
HDMI Eq on the  same I2C bus.
 BAXL Board Error
8x
Software Error (Also the main board’s memory or CAM 
module is a suspect)
 BAXL Board Error
9
0.5sec
Example: The figure above shows LED display when SHUTDOWN is caused by Audio 
Error. It repeats flashing for a specified number of times in 0.5sec/cycle and has a 3 seconds
interval of lighting off. Please note that a 3 seconds interval of lighting off is fixed regardless of abnormal state types.
module is a suspect)
9x
Tuner Board Error [TU_BOARD]
 Tuner Board Error

2-5. Triage Chart
Self Diagnostic Function
Reference 
Symptoms - Shutdown. Power LED
blinking red diagnostics sequences
No
Power
Video
- missing or distorted
Remote
Network
Audio
Skype
Smart 
Core
Bluetooth 
(BT)
No White 
Power LED 
& does not
Stationary 
coloured No video 
No 
video
No
Wireless
Skype
Smart 
Core no  
Bluetooth / 
One Step 
2
3
4
5
6
7
8
9
10 & does not 
response 
to remote 
(Dead Set)
coloured 
lines or 
dots      
One of 
Inputs
video 
all 
Inputs
No 
Remote
can't 
connect
No Audio
Skype 
Can't Work LED (Set 
is still 
alive)
Remote 
(OSR) can't 
connect
BAXL 
Board
















Board
TU* board







G2B Board






H** Board




Speaker


Speaker

Skype 
Module

Camera 
Module

Mic. 
Module

Module
Wifi Module



BT Module

LD Board


LVDS FFC




LVDS FFC




Tcon






LCD Panel






Power Power
LD
Panel
(Tcon)
Panel
(Backlight) TEMP
Soft-
ware
Emitter
Problem
(
)
(
g )
Audio
FAN
(N/A)
Local
I2C
10
Secondary possible defective part
Most likely defective part

RB2G
CHASSIS
W830B/ W840B/ W850B/  W855B
W856B/ W857B
SECTION 3
TROUBLESHOOTING
Troubleshooting
3-1. NO POWER
3-1-1. NO POWER
3-1-2. NO POWER – AYU2/AYU2L failure
No Power
AYU2/L Fail Suspected
Check STBY 3.3V 
L9107 or C9179
G2B Board
Replace
Between G2B Board  to
BAXL Board Harness
NG
NG
OK
eMMC / 
RawNAND erase
Product SW rewrite
Harness
OK
No
Product SW rewrite
Recover?
Product SW
writing issue
Yes
BAXL Board
Replace BAXL Board
No
Parts
Board PWB (BAXL- A side)
Detail
Parts
Board PWB  (BAXL A side)
Detail
(L9107)
1
L9107
L9107
11

RB2G
CHASSIS
W830B/ W840B/ W850B/  W855B
W856B/ W857B
Troubleshooting
3-2. LED BLINKING
3-2-1. LED Blinking: 3x (DC Alert & Communication Error)
3 2. LED BLINKING
3-times blinking
DC ALERT
Check
AUDIO
NG
Check D+1.0V at
JL9003 / JL9127 on 
the B* Board
F9105,IC9103,
Etc (B* Board)
DC_ALERT
NG
Change TUS/TUW 
Board
NG
Speaker
Speaker Impedance
at SP Connector
Check 
OK
Check 
+3 3V MAIN 1
OK
NG
TUNER Board
OK
Audio +12.5V
at pin 18/20 of CN9101
on the B* Board
(except Adapter 
model)
G* Board
NG
OK
+3.3V_MAIN_1
at JL9117 
on
the B* Board
F9104,IC9104,
etc (B* Board)
OK
Check 
+12.5V / +19.5V
at Power Amp side 
of F4401 / F4601 on
the B* Board
F4401 / F4601, 
IC4901 / IC4601
,etc
(B* Board)
OK
NG
Check 
+1.8V_MAIN on 
Pin 2 of IC9201
IC9201,etc
(B* Board)
NG
the B* Board
IC4901 / IC4601,etc
(B* Board)
OK
NG
Check 
+5.0V_MAIN
at JL9113 / JL9112 on
OK
IC9102 / IC9101
etc (B* Board)
the B* Board
(
)
Size
B* Board
G* Board
12
60”
BAXL
G2SB
70”
BAXL
G2SB

Display

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