Read Sony KLV-40ZX1 (serv.man2) Service Manual online
KLV-40ZX1 (GE) 2-7
Button malfunction
on the TV
Check key clicking
of the unit
Check the harness
between B board and
H1L board
Replace the
H1L Board
B Board
Harness
H1L Board
Key assembly with
mechanism or
H1L Board
OK
OK
NG
NG
NG
OK
2-1-6. TV AND COMMANDER BUTTONS MALFUNCTION
1) TV button malfunction
2) IR remote commander button malfunction
Button malfunction
of the IR remote
commender
Visual check the
sensor portion
Replace the
H4L Board
B Board
harness
H4L Board
Replace the
mechanism of the
remote commander
OK
OK
NG
NG
NG
OK
Check the harness
between the B board
and the H4L board
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