Sony KD-49X7 D Series Service Manual page 33

1.3 No Power DDCON/LDO
BM2/DPA Board Model
Board IC Ref Voltage supply
DPA IC403 +12V_MAIN
DPA IC408 +3.3V_STBY
DPA IC409
DPA IC4001
DPA IC4002
DPA IC4003
BM2 IC402
BM2 IC404
BM2 IC405
BM2 IC406 +1.1V_TU_SKP (J only)
BM2 IC601
BM2 IC604
(AC-ADP only)
(AC-ADP only)
+3.3V_MAIN
+1.5V_BE
+1.1V_BE
+1.0V_BE
+5.0V_VBUS
+5V_MAIN
+1.8V_TU
+1.5V_DDR
+1.0V_M2
DDCONs check
Please refer page-32 for Ref number.
START
Check fuse
no
F4xx / F40xx/F6xx
Is fuse OK?
yes
Check Vcc voltage
no
C4xx / C40xx/C6xx
Is voltage >12.0V?
yes
Check Enable pin
no
voltage
Is voltage >2.5V?
yes
Change DDCON IC
Change Fuse
Check POWER_ON P-on ucom #pin19
(Refer 1.2 No Power U-Com Failure)
1.2 No Power U-Com Failure
or
Enable source
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