Sony KDL-40NX710 / KDL-46NX710 (serv.man2) Service Manual ▷ View online
KDL-40/46NX710(CH)
53
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
2
3
4
5
6
7
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
BUHT BOARD
G* BOARD
HLT BOARD
W IFI MODULE
LVDS CABLE
LCD PANEL
Problem
POWER
POWER
DTT
AUDIO
POWER
PANEL
(TCON)
PANEL
(INVERTER)
TEMP
: doubtful part
: Few pos s ibility
Reference
Symptoms - Shutdow n. Pow er LED
blinking red diagnostics sequences
Video - missing or distorted
KDL-40/46NX710(CH)
54
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 ?
Do the buttons
on the TV & Remote
Commander work
properly?
END
See
No Power
No Power
See
Standby LED Blink
Standby LED Blink
See
No Picture / No Sound
No Picture / No Sound
See
TV/ Commander
button malfunction
TV/ Commander
button malfunction
Is the network
connection OK?
See
Can’t connect network
Can’t connect network
No
Yes
Yes
No
No
Yes
No
Yes
No
Yes
See
3D malfunction
3D malfunction
No
Yes
Is the 3D
function OK?
KDL-40/46NX710(CH)
55
TROUBLE SHOOTING
3-3. NO POWER
No Power
Check STBY 3.3V
at 1 pin of CN3800
on the BUHT Board
Harness
G* Board
Replace
Between G* Board to
BUHT Board Harness
BUHT Board
NG
OK
NG
OK
KDL-40/46NX710(CH)
56
1) 2 times blinkings (Main Power Error)
TROUBLE SHOOTING
3-4. STANDBY LED BLINK
2 times Blinkings
Check REG12V at
pins 6/7 of
CN3800 on
the BUHT Board
BUHT Board
Harness
G* Board
Replace
Between G* Board to
BUHT Board Harness
12V NG
12V OK
NG
OK
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