-28-
LAMP ABNORMALITY -2
Troubleshooting
BALLAST-2 ON/OFF
LAMP-2 MONITOR
BALLAST-1 ON/OFF
LAMP-1 MONITOR
LAMP
BALLAST-1
LAMP
BALLAST-2
UNIT PFC
PFC-1 ON/OFF
PFC-2 ON/OFF
AC-INPUT
RL12
CN1B
CN4B
CN2B
12V (+B)
IC1801
I /O EXP.
U20B34600
PFC-2
TEMP. SW
CONTROL
FET
CN3B
PFC-1
TEMP. SW
CONTROL
FET
AC 90V~264V
OUTPUT
DC 380V~400V
TEMP. SW
85˚C
85˚C
H: ON
H: ON
STABILISER
( CHOPPER )
LAMP
DRIVER
IGNITER
LAMP MONITOR
LAMP ON/OFF
CONTROL
K7B
K7C
K7A
MAINS ISOLATION
LAMP
ASS'Y
UNIT P.F.C.
IC1801
I/O EXP.
Output voltage.
At the time of a start : 20KVp-p
At the time of stability : AC 85V typ. (70~100V)
Output Frequency : 88 Hz typ.
DC INPUT
DC380~400V
UNIT LAMP BALLAST
H : Abnormality
H : ON
U20B39500/39800
TEMP.
SENSOR
85˚C
Check the unit P.F.C..
Check the unit lamp Ballast.
Dose the temperature
switch operate?
If the temperature around
FET reaches 85 degrees, the
PFC circuit will be shut down.
Check!
Check!
Check!
Check!
When the temperature
around a lamp driver reaches
85 degrees, unit lamp ballast
will be shut down and a lamp
monitor signal changes to H
from L.
Check!
Check!
Check!
Check!
When this output voltage
reaches abnormal voltage
(exceeds AC-130V), unit lamp
ballast will be shut down and a
lamp monitor signal changes
from L to H.
Caution : “ HOT ” Circuit !
Check!
Caution : “ HOT ” Circuit !
Содержание WF10 - PLV WXGA LCD Projector
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Страница 114: ...SANYO Electric Co Ltd Jan 2004 400 Printed in Japan ...