Sony KDL-32R324D / KDL-40R354D / KLV-32R326D / KLV-40R356D Service Manual ▷ View online
65
BA BOARD (A Side)
R1058
C1029
R5027
R5016
R1031
R1033
R1032
R1034
R1035
R1030
R1029
66
3-9. Tact Key
3-9-1. Switch Unit Buttons
Check STBY 3.3V and 3.3V
(V=3.3V?)
at probe point
(see next slide)
when AC is ON?
Switch Unit NOT FUNCTIONING
OK
NG
End
Check tact key connectivity
using multimeter (see picture)
NG
Tact key NG,
change B board
Check
DDCON
OK
NG
Part faulty,
change respective resistor
OK
HOW TO CHECK TACT KEY
CONNECTIVITY
•Use multimeter to probe tact
key as below.
•When the tact key is pressed,
there should be a connection
(0 ohm)
Check resistance
during AC OFF.
Probe point
for BA2 board
STBY 3.3V
3.3V
R9703
R9709
R9710
R9705
R9704
67
68
3-10. IR
3-10-1. Troubleshooting flow
TV cannot be controlled
by remote commander
OK
NG
Green LED light up
at Power LED indicator
Confirm Harness connection
OK on B-Board and HK Board
Change Harness
Harness NG
NG
NG
Green LED blinks at Power indicator
when using commander
near sensor’s window
OK
NG
Harness loose connection
Change B-board
NG
Change HK board
HK board NG
Change mechanical parts
(eg. Bezel, Guidelight)
OK
OK
OK
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