Sony KDL-40HX720 / KDL-40HX723 / KDL-40HX725 / KDL-46HX720 / KDL-46HX723 / KDL-46HX725 Service Manual ▷ View online
KDL-40/46HX720,723,725(AEP/UK)
45
SEC 3. TROUBLE SHOOTING
3-1. TRIAGE CHART
Note: Power board is different in name every inch. Therefore this section displays difference point in "*".
No
Pow er
Remote
Netw ork
Audio
Skype
2
3
4
5
6
7
8
10
No Green
Power LED
(Dead Set)
Stationary
colored lines
or dots
No video
one of Inputs
No video
all Inputs
No
Rem ote
Wireles s
can't
connect
No Audio
Skype
Can't Work
BATV BOARD
G* BOARD
HLR2 BOARD
SPEAKER
Skype MODULE
W IFI MODULE
LD BOARD
LVDS CABLE
T-CON
LCD PANEL
Problem
POWER
POWER
AUDIO
POWER
PANEL
(TCON)
PANEL
(INVERTER)
TEMP
Software EMITTER
: doubtful part
: Few pos s ibility
Reference
Video - missing or distorted
Symptoms - Shutdow n. Pow er LED
blinking red diagnostics sequences
KDL-40/46HX720,723,725(AEP/UK)
46
TROUBLE SHOOTING
3-2. FLOW CHART
START
Does the Power Led
stay on when the
TV is switched on ?
Is the Standby Led
blink ?
Is the Picture and
Sound OK ?
END
See
No Power
No Power
See
Standby LED Blink
Standby LED Blink
See
No Picture / No Sound
No Picture / No Sound
Is the network
connection OK?
See
Can’t connect network
Can’t connect network
No
Yes
Yes
No
No
Yes
See
3D malfunction
3D malfunction
No
Yes
Is the 3D
function OK?
Do the buttons
on the TV & Remote
Commander work
properly?
See
TV/ Commander
button malfunction
TV/ Commander
button malfunction
No
No
Yes
No
Yes
See
Skype malfunction
Skype malfunction
No
Is the Skype
function OK?
See
HDD Rec malfunction
HDD Rec malfunction
No
Is the HDD Rec
function OK?
Yes
Yes
KDL-40/46HX720,723,725(AEP/UK)
47
TROUBLE SHOOTING
3-3. NO POWER
No Power
Check STBY 3.3V
at pin 10 of CN6001
on the B* Board
Harness
G* Board
Replace
Between G* Board to
B* Board Harness
B* Board
NG
OK
NG
OK
KDL-40/46HX720,723,725(AEP/UK)
48
1) 2 times blinking (Main Power Error)
TROUBLE SHOOTING
3-4. STANDBY LED BLINK
2 times blinking
Check REG12V at
pins 2/3 of
CN6001 on
the B* Board
B* Board
Harness
G* Board
Replace
Between G* Board to
B* Board Harness
12V NG
12V OK
NG
OK
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