Sony KD-49X9 F Series Service Manual page 19

1.3 No Power DDCON/LDO
DDCON check
START
Check IC402 Vcc voltage
C423
Is voltage >12V?
yes
Check Vcc voltage
C602
Is voltage >4V?
yes
Check Enable
IC600 #pin1
Is voltage >2.5V?
yes
Change DDCON
IC601
TV Business Division
no
Check Vcc voltage
C602
Is voltage >3V?
yes
no
Check
D601
Is diode alive?
yes
no
Change IC600
BM2A Board Model
IC Ref
IC601
no
Check
D600
Is diode alive?
yes
no
Change D601
Check +5V_MAIN DDCON (IC402)
19
Voltage supply
+1.5V_DDR
no
Change D600
Check +3.3V_STBY.
G* board
(Supplementary
information)
19