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KDL-20/26/32/37/40S4000 (WB) 2-1
SECTION 2
TROUBLESHOOTING
Symptoms - (dead set)
Video - distorted or missing
Reference
2
3
4
5
6
7
8
10
11
13
No Video
No Video
No Video
No Tuner
No
No
Blinks
Blinks
Blinks
Blinks
Blinks
Blinks
Blinks
Blinks
Blinks
Blinks
No Power
BL OK
No BL
BL OK
Video OK
HDMI
Audio
OSD OK
No OSD
BG1
BG1TF (40) Board
BG1TW (20-37) Board
Power
IP5Z (40) Board
POWER UNIT (20-37) Board
Panel Module
Flowchart Reference
C
CCC
CC
CCC
CB
EEEE
E
D
Problem
DC_DET
DC_ALERT1
DC_ALERT2
DC_ALERT3
BackLight
TEMP
Audio
DFE
B-Engine
Balancer
: Doubtful part
: just a few possibility
KDL-20/26/32/37/40S4000 (WB) 2-2
Troubleshooting
YES
Set Power
NO
See
2-1. No Power (Chart_B)
See
2-3. Audio Problem (Chart_D)
See
2-4. Video problem (Chart_E)
Audio
Video
Red blinks
LED
Green
See
2-2. Self Diagnosis
(Chart_C)
KDL-20/26/32/37/40S4000 (WB) 2-3
No
88-132VAC
Inlet on Power Board
1)
Yes
3.3VDC
(CN5500 3Pin on
BG1 board
2)
)
NO
Power Board
1)
(No STBY3.3V)
YES
NO
YES
AC cable or AC inlet
No Power
(No relay clicks)
Does Power
button work?
BG1 board
2)
2-1. No Power (Flow Chart_B)
Switch Unit
1)
20"-37":
POWER UNIT
40":
IP5Z BOARD
2) 20"-37":
BG1TW
BOARD
40":
BG1TF BOARD
KDL-20/26/32/37/40S4000 (WB) 2-4
Panel Balancer Trouble
BALANCER
13 times
Digital FE Module Trouble
DFE
10 times
Fan Error (Not Detected.)
FAN
9 times
Monitor an Increase of an Inside-Temperature
TEMPERATURE
7 times
Audio Trouble
AUDIO
8 times
Backlight Trouble
BACKLIGHT
6 times
Panel12V Trouble
5 times
D3.3V or THH3.3V Trouble
DC ALERT1
3 times
Main Supply Voltage Trouble
DC_DET
2 times
Contents
Display
(Self Diagnosis mode)
Red LED
Blink
When self diagnosis happens, STBY (Red) LED blinks and the history can be
seen on display by self diagnosis mode.
2-2. Self Diagnosis
REG5V or FE3.3V Trouble
DC ALERT2
4 times
DC ALERT3
BH Board Trouble (Not Detected.)
HFR
12 times
Trident IC Trouble
B-ENGINE
11 times
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