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INF-17

Perform maintenance of the air filter in the following case.
•  The air filter is clogged with dust, causing the filter replacement message to appear on the screen.

• Make sure to turn off the power before performing maintenance on the air filter unit.
•  Make sure that the projector is stable, and perform the maintenance in a safe place where the unit will not be damaged even 

if you drop the air filter unit.

1) Remove the air filter cover. (Fig. 1)
  •  Open the air filter cover in the direction of the arrow and remove it.
2) Remove the air filter unit. (Fig.2)
  •  Hold the tab of the air filter unit and pull out in the direction of the arrow. 
  •  After removing the air filter unit, remove foreign objects and dust from the air filter compartment and the projector’s air 

intake port if there are any.

3) Attach the unused air filter unit to the projector (Fig.3)
  •  Hold the air filter unit that the tab is in up-left side in the figure, put the right side in the figure first, and press the tab side 

until make a click sound.

  • Please press the tab of the air filter unit other than the pleated filter during installation.
4) Install the air filter cover.
  •  Perform Step 1) in “Removing the air filter unit” in the reverse order to close the air filter cover and press
    it firmly until make a click sound.
  • Make sure that the air filter cover is closed tightly.

Air filter cover

Air filter unit

Tab

Tab

•  Turn off the power before you replace the air filter unit.
•  When attaching the air filter unit, make sure that the projector is stable, and work in an environment that is safe, even in the 

event of the air filter unit dropping.

•  Make sure that the air filter unit is properly attached before using the projector. If it is not attached, the projector will suck in 

dirt and dust causing a malfunction.

•  Do not put anything into the air vents. Doing so may result in malfunction of the projector.
•  The air filter unit to be replaced should be an unused product.
•  After replacing the air filter, reset the filter counter. Otherwise, “FILTER COUNTER has reached the set time.” will appear on 

screen.

• The replacement cycle of the air filter unit varies greatly depending on the usage environment.

INF-18

This projector provides the shutdown function to set into the standby mode immediately for product safety when the projector 
has the fan operation error or lamp lightning error. 

Not lighting or flashing

Power supply block
Fuse : Rated 6.3A

Blown out of fuse (with another reason)
Disconnecting the connectors
Power board failure
Ballast board failure

－

Thermal fuse 
 

⇒ Over 113ºC

Blown out of thermal fuse (with another reason) 
Check usage environment
Disconnecting the thermal fuse

－

Sub-microprocessor communication error

Sub-microprocessor failure
Disconnection the communication lines

－

LAMP LED lights

Lamp runtime
 

⇒  More than 5000 hours 

(Shutdown in 10 minutes)

Lamp runtime is over

“REPLACE LAMP IN ** MIN-
UTES, POWER WILL TURN OFF 
AND GO INTO STANDBY

　MODE 

AUTOMATICALLY.”

LAMP LED brinks 
(0.5 seconds cycle)

Lamp igniting error/Lamp goes off

Lamp cover not installed
Disconnecting the connectors
Lamp error/burning
Ballast block error 

－

WARNING LED lights

Temperature exceeds a threshold (*1)

Temperature error

－

Sum of the fan voltage level and filter 
clogged level (*2)

Filter clogged

－

WARNING LED blinks
(2 seconds cycle)

No fan sense signal
Each fan sense signal level
 

⇒  The signal is less than 50% of target 

level for more than 5 seconds

Disconnecting the connectors
Fan rotation error/ abnormal
Fan control circuit on the main bard has error.

－

Power supply error

Disconnecting the connectors
Board error

－

*1  It depends on the lamp mode , fan mode or installed environment.
*2 It depends on the various levels of the filter clogged and fan voltage.

The count down number 10 to 1 
will be indicated in **.

INF-19

* The letters in the left of inspection items indicate the P.C. Boards related to their respective descriptions.
* Please check items with the interlock switch on. 

Check the connection of each connector

 

AC inlet, K6B - K602, K6R -  K8R

NG

Connect the cables properly

A

Disconnect the connectors [K8R]. Check the short circuit 

between pins (5)-(6), (10)-(11) of connector [K8R].

NG

A

Replace the [A] P.C.Board

P

Check and replace the [P] P.C.Board

OK

OK

INF-20

Confirm the connection of each connector on A-P.C 

Board and lamp.

Confirm the lamp fixing screws.

NG

Connect the cables properly

Confirm the lamp condition

NG

Replace the lamp

Is each thermal sensor operating in normal?

NG

Check each thermal sensor and connection

A

Confirm that the short circuit between terminals (K6D_1A) and 
(K6D_2A).  (DC 380V is observed in normal)

NG

A

Check or replace [P] P.C.Board

Is each fan rotating when the projector turns on?

NG

Check each fan and connection

A

Confirm that the voltage at pin (2) of connector [K8R] changes 
from Low to Hi when the power is ON.

NG

A

Check or replace [A] P.C.Board

A

Confirm that the voltage at pin (1) of connector [K8R] changes 
from Low to Hi when the power is ON.

NG

A

Check or replace [A] P.C.Board

OK

OK

OK

OK

OK

OK

OK

BQ Replace [BQ] P.C.Board

BQ

Confirm the voltages between pins of connector [CN1] below;
 

(1) - (3)    DC 380V ± 20V

 

(3) - (4)   DC 16.5V ± 1.6V

NG

BQ Check the cable [ZK6D].

P

Confirm that the short circuit between terminals (K6D_3A) and 
(K6D_2A). (DC 16.5V is observed in normal)

NG

P

Check or replace [P] P.C.Board

OK

OK