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1-36 (No.YA092B)
5.1.7 DISPLAY METHOD WHEN RASTER IS NOT AVAILABLE
In a state where a display screen does not appear due to the failure of this unit, the POWER LED (blue) and LAMP LED (orange) can
light up and display a trouble mode.
The factors in case the power is forcibly shut down at the time of failure are memorized and those are displayed.
EXPLANATION ON ACTION
If NG is detected on an item being diagnosed, turn off the power on this unit. As soon as the power goes off, turn on and off POWER
LED and LAMP LED immediately. After the power is shut down, it becomes impossible to turn on the power until the power cable
is either plugged in or unplugged from the AC outlet.
When [1] and [3] take place at the same time, give priority to [1], and [2] will not take place simultaneously with [1] and [3].
Check item Contents
Classifi-
cations
LED flash cycle
POWER LED LAMP LED
Lamp does not light up Detection of lamp return (LAMP_RTN) signals output
depending on the status of the lamp supply electric
current monitored constantly within the lamp ballast unit.
(H = Off)
[LAMP BALLAST UNIT : CN200 [3pin] ]
3
0.1 sec interval
Simultaneously
0.1 sec interval
Simultaneously
Lamp goes out Detection of lamp return (LAMP_RTN) signals output
depending on the status of the lamp supply electric
current monitored constantly within the lamp ballast unit.
(H = Off)
[LAMP BALLAST UNIT : CN200 [3pin] ]
3
0.1 sec interval
Simultaneously
0.1 sec interval
Simultaneously
Abnormal DD CPU circuit Detection of serial communication error between MAIN
DRIVE PWB and RECEIVER PWB.
[IC3701 [5 / 7pin] ] (MAIN DRIVE PWB)
2 -------------------- 0.5 sec interval
Fan lock (stop) Detection of LOCK signals outputting the operation
(circuit) status of the cooling fan. (H=Abnormal)
[IC8005 : 1 / 2 / 4 / 5-pin] (FAN CONTROL PWB)
1
0.5 sec interval
Alternately
0.5 sec interval
Alternately
Lamp cover open Detection of the interlock switch status for the lamp cover.
(H = Abnormal)
[S0201] (LAMP COVER SW PWB)
3
0.1 sec interval
Simultaneously
0.1 sec interval
Simultaneously
Abnormal D-ILA DEVICE
temperature
Detection of abnormal inner cabinet temperature. (53°C)
[ IC2001] (TEMPERATURE SENSOR PWB)
1
0.5 sec interval
Alternately
0.5 sec interval
Alternately
36


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