Troubleshooting - JVC D-ILA DLA-N11BC Service Manual

5.1 PROTECTIVE SENSOR AND PROTECTIVE SWITCH
In event of abnormal operation due to circuit or component fail-
ure, setting error or other reason, in order to prevent serious
damage to the set and preserve the integrity of peripheral equip-
ment, sensors and switches are provided for protective func-
tions. Cooling is conducted at the same time a corresponding
LED flashes (about 10 seconds). The LED indication with respect
to the protective function is described below.
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 indica-
tors.When an LED indicates, operation (projection) automatically stops and the cool-down mode (about 10 seconds) is entered then
the stand-by mode.
Content
The lamp don't light
The lamp turn off
The lamp cover opening
The cooling fan lock
The internal temperature is too high
The exterior temperature is too high
DD PWB abnormal
MOTOR PWB abnormal
CPU PWB abnormal
POWER PWB abnormal
Lamp time warning
During standby
During cooling mode
During power up
During Power On (Hide off)
During Power On (Hide on)
FW update complete
FPGA writing error
O: Turned on during operation, : Blinking on during operation, Blinking time: Each time of turning on/off
SECTION 5

TROUBLESHOOTING

5.1.1 Protective sensor
Temperature
sensor
5.1.2 Protective switch
Interlock
switch
WARNING LIGHT
O 
O 
O 
 -
 -
-

 
 
 
 
- O
- -
- -
- -
- -
- -
O O
-

Type Monitor objective
External temperature sensor
Internal temperature sensor
Lamp (thermostat)
Near the DD FPGA IC
Near the DD ASIC IC
Heat sink of R device
Heat sink of B device
Heat sink of G device
Monitor
Type State
objective
Lamp door Open/
close
LED
STANDBY/ON On/Off time
- 0.25s
- 0.25s
- 0.25s
- 0.25s
- 0.25s
- 0.25s
- 0.25s
- 0.25s
- 0.25s
- 0.25s
-
O (Red)
 (Red) 0.5s
O (Green)
-
 (Green) 0.5s
O (Green)
 (Red) 0.25s
Operating
point
46C
66C
95C
100C
100C
75C
75C
75C
Operation contents
Control with microcomputer
Blinking
Delay time
times
0.5s 1
0.5s 2
0.5s 4
0.5s 2
0.5s 3
0.5s 4
0.5s 1
0.5s 2
0.5s 3
0.5s 4
0.5s 2
(No.PA062<Rev.001>) 19