1-22 (No.PA037<Rev.001>)
SECTION 5
TROUBLESHOOTING
5.1
PROTECTIVE SENSOR AND PROTECTIVE SWITCH
In event of abnormal operation due to circuit or component failure, setting error or other reason, in order to prevent serious damage
to the set and preserve the integrity of peripheral equipment, sensors and switches are provided for protective functions. Cooling is
conducted at the same time a corresponding LED flashes (about 90 seconds). The LED indication with respect to the protective func-
tion is described below.
5.1.1 Protective sensor
5.1.2 Protective switch
5.2
LED (INDICATOR) WARNING INDICATIONS
5.2.1 Led indication contents
If an abnormality occurs during operation (projection), the content of the problem can be determined from flashing LED indicators.
When an LED indicates, operation (projection) automatically stops and the cool-down mode (about 60 seconds) is entered then the
stand-by mode.
O :
Turned on during operation
z
: Alternate Lighting/Extinction during operation [Flickering interval]
Type
Monitor objective
Location
Operating point
Function
Thermal sensor
(Thermostat)
Lamp unit
Optical block (Lamp section) 90
°
C
The [WARNING] LED turns on.
Thermal sensor (IC) Set interior
(Lamp area)
TENP PWB ASS'Y
70cC
The [WARNING] LED turns on.
Thermal sensor (IC) Set exterior
(Filter area)
PROCESSOR PWB ASS'Y
51
°
C
The [WARNING] LED turns on.
Motor operation de-
tection circuit
Cooling fan
Cooling fan interior
Fan stop
Power off by main CPU (emergency mode)
Type
Monitor objective
Location
Operating point
Function
Interlock switch
Lamp cover
Lamp cover
Switch open
Control by CPU
Lens shutter end
sensor
Lens shutter
Front panel
Switch open
Control by CPU
No.
Flashing LED
Flash
time
Flash
number
of times
Warning cause (project mode)
Warning
LAMP
1
O
z
0.25sec.
1 time
No projection caused by the lamp failure.
2
O
z
0.25sec.
2 times Lamp extinction during the projection
3
O
z
0.25sec.
3 times The lamp cover is removed
4
z
0.25sec.
1 time
POWER PWB malfunctions.
5
z
0.25sec.
2 times Ventilation fan in the unit is stopped. [Fan Lock]
6
z
0.25sec.
3 times Internal temperature becomes extraordinarily higher.
7
z
0.25sec.
4 times Exhaust temperature at the vent is extraordinarily high or forced high due to high am-
bient temperature
8
z
z
0.25sec.
1 time
DD PWB malfunctions.
9
z
z
0.25sec.
2 times Error communication in DD CPU
10
z
z
0.25sec.
3 times PROCESSOR PWB malfunctions.
11
z
z
0.25sec.
4 times Lens barrier malfunctions.
Summary of Contents for DLA-HD550-BC
Page 27: ... No PA037 Rev 001 1 27 ...
