JVC HD-52Z585 Service Manual page 36

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.
Check item
Lamp does not light up
Lamp goes out
Abnormal DD CPU circuit
Fan lock (stop)
Lamp cover open
Abnormal D-ILA DEVICE
temperature
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].
1-36 (No.YA092B)
Contents
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] ]
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] ]
Detection of serial communication error between MAIN
DRIVE PWB and RECEIVER PWB.
[IC3701 [5 / 7pin] ] (MAIN DRIVE PWB)
Detection of LOCK signals outputting the operation
(circuit) status of the cooling fan. (H=Abnormal)
[IC8005 : 1 / 2 / 4 / 5-pin] (FAN CONTROL PWB)
Detection of the interlock switch status for the lamp cover.
(H = Abnormal)
[S0201] (LAMP COVER SW PWB)
Detection of abnormal inner cabinet temperature. (53°C)
[ IC2001] (TEMPERATURE SENSOR PWB)
LED flash cycle
Classifi-
cations
POWER LED
0.1 sec interval
3
Simultaneously
0.1 sec interval
3
Simultaneously
2 -------------------- 0.5 sec interval
0.5 sec interval
1
Alternately
0.1 sec interval
3
Simultaneously
0.5 sec interval
1
Alternately
LAMP LED
0.1 sec interval
Simultaneously
0.1 sec interval
Simultaneously
0.5 sec interval
Alternately
0.1 sec interval
Simultaneously
0.5 sec interval
Alternately