57
no
yes
no
yes
no
yes
no
no
yes
no
yes
no
yes
yes
No Power
Standby
LED Lights up in
standby mode
FLD shows
PROTECT
?
15V
to PU04?
PU04 has any problem.
QU01(76p or 77p) lnput level
is too Low.
Can PY04
24V ?
Connection has
problem
Relay
(LB02:PB04)
control is OK ?
PB04 , or connection has
any problem
PY04,or Main Transf(L001)
has any problem
Vkk or FL is not supplied
to PC04
Power supply circuite (P854)
has any problem.
To be check +5VL or
_P_DOWN signal.
24V
to PU04?
PB04 or Sub Transf (LB01)
has any problem
Can PY04
15V ?
OSD IC (QL03) or have
no
driver QL04, QX04 have
any trouble
yes
no
yes
Input to OSD IC(QL03) has any trouble.
Video input detection has any trouble.
To be ckeck VSYNC or QL02
No picture
from Monitor output
OSD menu is
shown?
Video Input select circutes
have problem
VCR1&2 out
are OK ?
Video output stage are no problem
OSD ICs control is no problem
12. TROUBLE SHOOTING
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