KDL-40WE5, KDL-46WE5 (serv.man2) - Sony TV Service Manual (repair manual). Page 12

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KDL-40, 46WE5
RM-GD007
SECTION 3
TROUBLESHOOTING
3-1. Flowchart
3-1-1.   Flowchart A(i)
Flowchart A(ii)
No Power/Shut down/No Picture
Try On/Off at Main SW
and with Remote Commander
Is it LED(STBY) 
indicator turn on 
or blinked?
Is it correct 
Connection at 
Wire harness?
Check Harness holder, Header pin 
and Wire harness.
Is it bended or damaged?
(If yes, replace it to a new one)
Count blink and replace board to 
obey with 2-6 triage chart.
Refer Section 3.2 Board 
Replacement Order.
Yes
No
Power source is out of order. 
Other circuit block is out of order 
except for Power board. Check 
STBY3.3V Vcc line and circuit.
Yes
No
2, 5, 7,10, 13 blinks, No Video/
No BL, No Power
176-264VAC
Inlet on
INV PWR BOARD
IPB-4001//Q(IP3) 
3.3V_DC
CN1300 3PIN
on BA Board 
Does Power
Button work?
BA Board
AC Cable or
AC Inlet
Switch Unit
No
No
No
88-132VAC
Inlet on
INV PWR BOARD  
IPB-4001//Q(IP3)
Destination
Taiwan
 
E, Hong Kong
INV PWR BOARD
IPB-4001//Q(IP3)
(No STBY 3.3V)
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