Daewoo DV-K784N-JJ, Service Manual

Page: 90 / 128

89
TROUBLESHOOTING GUIDES (Continued)
Is video signal input into pin
#
and
^
of IC303
YES
NO
A.
Is 5V supplied at pin
(
of IC151
YES
NO
Is signal output from pin
*
of IC303
YES
NO
Check IC601 pin
M
Tuner mode: H
Line mode : L
NO
YES
Is 5V suppiled to pin
y
and
]
of IC301
Check PCB pattern
Is signal input into pin
o
of
IC301
YES
NO
Is signal output from pin
I
of
IC301
YES
NO
Check IC601
YES
Check power circuit.
Change IC303
Is signal Input into pin
8
of ICS01
YES
NO
Is signal output from pin
6
of ICS01
YES
NO
RF out
YES
Check IC301 to pin
q
EE mode : L
PB mode : H
Check PCB pattern
and ICS01
Check OSD circuit
Line out
Check power
circuit NO
High
Check IC601
Change IC301
Low
Check PIF circuit and
LINE IN JACK
EE MODE Picture NG
VIDEO CIRCUIT