Sony KLV-28R412B Service Manual page 29

3-5. Audio
3-5-5. Analog RF No Sound
NG
Change RF cable
NG
Change RF
source/channel
NG
Refer "Speaker No
Sound"
NG
Refer "Tuner
Problem"
Analog RF input no
sound
RF cable,
ok?
OK
RF source,
ok?
OK
Raster sound,
ok?
OK
OK
Tuning,
ok?
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
UI setting, ok?
(TV System, AFT, Audio Filter)
OK
Change B-board
B*Board Type:
Size
28"
32"
40"
48"
ITC3
CHASSIS
NG
Correct UI
B* Board Type
PAN ASIA, CHINA EUROPE, AMERICA
BIS -
BIS BIL
BIS BIL
BIS BIL
29