Sony KLV-28R412B Service Manual page 11

3-2. No Power
3-2-1. DD Con
Start
B-Board
Check voltage at JL6003
3.3V?
Yes
B-Board
Check voltage at JL6000
1.2V?
Yes
B-Board
Check voltage at JL6002
1.5V?
Yes
B-Board
Check voltage at JL6005
5V?
Yes
DDCON
OK
B-Board
No
Check fuse.
F6001 & F6002
No
Change B-board
No
Change B-board
No
Change B-board
R410/412/413/420/422/423/424/425/426/427/428/430/433/435/
450/453/455/470/472/473/475/477/478/480/483/485/M5/M10B
No
Fuse
B-Board
Check voltage at :
BIS  JL6012.
BIL  JL6007.
12V?
After checking, take note of
NG condition & change B board
ITC3
B*Board Type:
B* Board Type
Size
PAN ASIA, CHINA EUROPE, AMERICA
28" BIS -
32" BIS BIL
40" BIS BIL
48" BIS BIL
DDCON
OK
B-Board
No
Check Fuse.
F6003
No
Fuse
CHASSIS
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