Sony KD-55X8 G Series Service Manual page 32

1.3 No Power DDCON/LDO
BSL Board Model
Board Operation IC Ref
BSL DC/DC IC408
BSL DC/DC IC402
BSL DC/DC IC400 3.3V_MAIN/3.3V_AUDIO
BSL DC/DC IC405
BSL DC/DC IC601
BSL DC/DC IC604
BSL DC/DC IC608
BSL DC/DC IC609
BSL DC/DC IC610
BSL DC/DC IC409
BSL DC/DC IC410
DDCONs check
Voltage supply
1.8V_TU_P
5V_MAIN/5V_AUDIO
1.8V_TU
1.2V_M3_DDR
1.05V_M3_A
1.0V_M3_CORE
1.0V_M3_CPU
1.0V_M3_GPU
1.5V_FRC
0.95V_FRC
Pleas refer page-3~4 for Ref
number.
START
no
Check fuse
F4xx / F6xx
Is fuse OK?
yes
no
Check Vin voltage
C4xx / C6xx
Is voltage >12.0V?
yes
no
Check Enable pin
voltage
Is voltage >2.5V?
yes
Change DDCON IC
Change Fuse
1) Check POWER_ON P-on u-com #pin10
(Refer 1.2 No Power U-Com Failure)
2) Check G* board
1.2 No Power U-Com Failure
or
Enable source
(Supplementary
information)
32