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11. TROUBLE SHOOTING
No Power
Standby
Power supply circuite (PS04)
no
LED Lights up on
standby mode
yes
FLD shows
no
Vkk or FL is not supplied
ERROR PWR1
to PU04
?
yes
no
Supply +24V
to PY04?
yes
no
Supply +15V
to PY04?
yes
Can P804
supply +15V ?
PY04 has any problem.
QY01(92p, 93p) lnput level
is too Low.
No picture
from Monitor output
no
VCR1&2 out
are OK ?
yes
no
OSD menu is
shown?
yes
OSD ICs control is no problem
Video output stage are no problem
Input to OSD IC(QL09, QZ11) has any trouble.
Video input detection has any trouble.
To be ckeck SYNC DET1, SYNC DET2
has any problem.
To be check +5VL or
PDOWN signal.
no
Can PS04
supply +24V ?
yes
no
yes
Connection has
PS04,or Sub Transf (U:L002
problem
C,K,S:L052) has any problem
OSD IC (QL09, QZ11) or have
driver QL08, QZ09 and QZ10
have any trouble
U:LB03/C,K,S:LB53
Control is
P804,or Main Transf (U:L001
C,K,S:L051) has any problem
Video Input select circutes
have problem
66
Relay
no
Ok ?
yes
U:PB14/C,K,S:PB64 or
connection has any problem
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