3
．
No sound, but picture is normal:
Yes
Yes Yes
No
No No
Yes
No
Yes
No
No sound
Check if levels
of
N607-PIN3&13
are 12V?
Check 12V of
power board
and power
supply circuits
from X601 to
X607 on main
board.
Check if levels of
N607-PIN6&7are
all high?
Check if levels
of V615-b# and
V607-b# are
both low.
Check if there
is sound from
speakers?
Check
main
chip
audio
output
circuits.
Touch CV04
and CV05 with
probe, check if
there is sound
from
earphones.
Check
earphone
amplifier
circuits
Replace
X607
Replace V615
、
V607
Replace N101
Summary of Contents for LED-19XR11
Page 30: ...Power board ...
Page 32: ...APPENDIX B Exploded view LED 19XR11 ...
Page 37: ...July 2011 ...
