(No.YA337)1-41
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/PROGRAM LED
(orange) can be flushing 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 the error of [1] or [2] occur, [3], [4], [5], [6], [7] are no longer recognized.
Check item
Contents
Classifications
LED flash cycle
POWER LED
(BLUE)
LAMP/
PROGRAM LED
(ORANGE)
Fan lock (stop) and
CABLE CARD error for
ATSC tuner
MAIN CPU detects the command of the Fan lock (stop)
and CABLE CARD error which ATSC TUNER MODULE
has detected.
IC7601
[DIGITAL PWB]
1
---
2 sec interval
Low bias line short
protection
Detection of the low bias line(5V/9V/12V) short.
Q9821
,
Q9831
,
Q9861
[POWER PWB
]
2
---
1 sec interval
Lamp cover open
Detection of the interlock switch status for the lamp
cover. (H = Abnormal)
S0861
[LAMP COVER SW PWB]
3
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)
CNBCT
[DRIVE PWB]
6
0.1 sec interval Simultaneously
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)
CNBCT
[DRIVE PWB]
6
0.1 sec interval Simultaneously
Fan lock (stop) for
optical system
Detection of LOCK signals outputting the operation
(circuit) status of the cooling fan. (H=Abnormal)
IC8005
[DRIVE PWB]
4
0.5 sec interval Alternately
Abnormal DD CPU
circuit
Detection of serial communication error between MAIN
DRIVE PWB and RECEIVER PWB.
IC3701
[DRIVE PWB]
5
0.5 sec interval Alternately
Abnormal D-ILA
DEVICE temperature
Detection of abnormal inner cabinet temperature. (53
°
C)
IC2001
[THERMO PWB]
7
0.5 sec interval Alternately
