Daewoo DV- K584N-SJ, Technical Manual

Page: 86 / 123

85
TROUBLESHOOTING GUIDES (Continued)
Is envelope output from
ICA01 pin
)
?
YES
NO
D.
Is signal input at IC301
pin
1
,
5
?
YES
NO
Is signal output from
IC301 pin
8
,
0
?
YES
YES
Is signal input into
IC301 pin
‘
?
YES
NO
YES
Is signal output
from IC301 pin
E
?
YES
Is signal input into
e
?
Is composite video signal
out from IC301 pin
t
?
YES
Is composite video signal
input into IC301 pin
r
?
YES
Is composite video signal
output from IC301 pin
I
?
YES
Check OSD circuit
NO
NO
YES
NO
Low
High NO
YES
NO
YES
NO
NO
NO
NO
NO
NO
YES
YES
Is 5V supplied at
ICA01 pin
5
?
Check PCB
pattern
Check IC301
pin
y
,
]
5V?
Check IC301 pin
q
EE mode: L
PB mode: H
Check power
circuit
Is SW pulse input into
ICA01 pin
%
?
Check IC601
pin
8
Check Power
circuit
Check IC601
pin
p
Change IC301
Check Q301
Change IC301
Change IC301
Is composite video
signal output from
IC302 pin
#
?
Is 5V supplied
to IC302 pin
*
?
Is CLOCK
(3.58MHz)
Supplied at
IC303 pin
%
?
Does X301
crystal (3.58MHz)
oscillate?
Change X301
(15PPM)
Check Q351
Clean head or
change head
PB video signal missing (4-head and 4-head Hi Fi model)