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SECTION 1  SERVICE  INFORMATION

< DZ780/DW750/DX820 >

1. Transfer the adjustment and setting data of the original A-P.C.Board to the new A-P.C.Board using the service
    software and a personal computer.

* Refer to [SECTION 3 Adjustments] for the procedure.

2. If you cannot transfer the data that uses the adjustment software, remove IC3711 and IC3716 from the original 
    board and mount them on the new board.
3. When A-P.C.Board is replaced, the MAC address of wired LAN will be changed. Explain it to the customers in advance.

・

Set the MAIN POWER switch to "OFF" and disconnect the power plug from the power outlet.

・

Do not replace the lamp unit when it is high temperature. (Wait at least one hour after use.)

1. The estimated duration before replacement is 4 000 hours, but the lamp may go off before reaching to 4 000 hours,
    usage conditions, and the installation environment.
    It is recommended that the Replacement lamp unit be prepared earlier.
2. When comes time to replace the lamp, the message is displayed and the indicator ligted in red.

3. If you continue to use the lamp unit after 4 000 hours has elapsed, the lamp turns off automatically after approximately
   10 minutes, as it may cause malfunction of the projector.

・To predict when to replace the lamp, check the lamp runtime displayed on [LAMP1] and [LAMP2] in [STATUS].
・

4 000 hours is a rough estimate for replacement, and not a guaranteed time.

・

The lamp runtime that is displayed in the [STATUS] is real time.

・

The following conversion is required to calculate the rough estimate for lamp replacement.

( 

A × ６ ＋ B × ４ ) ÷ ６

・ Ａ

 :

 Runtime when [LAMP POWER] is set to [NORMAL]

・ Ｂ

 :

 Runtime when [LAMP POWER] is set to [ECO]

1. Since the luminous lamp is made of glass, it may burst if dropped or hit with a hard object. Handle with care.
2. When replacing the lamp unit, be sure to hold it by the handle because its surface is pointed and its shape is protruded.
3. When the projector is mounted on the ceiling, do not conduct work while your face is near the lamp unit.
4. Do not remove or loosen the screws other than specified ones when replacing the lamp unit.

・

When you replace the lamp unit with new one, the projector resets the runtime of the lamp unit automatically.

・

When replacing the lamp unit, it is recommended to replace the air filter as well.

  (The replacement lamp unit comes with air filter.)

REPLACE LAMP

Over 3 800 hours

The message is displayed for 30 seconds. Pressing 
any button on the control panel or remote control 
within 30 seconds will clear the message.

The indicator lights in red even during the standby 
mode. (Only the corresponding lamp lights on.)

Over 4 000 hours

The message remains displayed until you press any 
button.

Replace the lamp unit after the lamp has cooled (after waiting at least one hour).
The high temperature inside the cover will cause burns.

INF - 16

SECTION 1  SERVICE  INFORMATION

< DZ780/DW750/DX820 >

1. Power off the projector and disconnect the power plug from the power outlet. 
    And wait at least one hour, and check if the lamp unit has cooled down.
2. Loosen the lamp unit cover fixing screw (one screw) until it turns freely, and then open the lamp unit cover 
    in the direction of the arrow.

・

Opening the lamp unit cover quickly may damage the cover.

・

If you loosen the lamp unit cover fixing screw with the projector
installed upward in the vertical direction, the lamp unit cover
may open on its weight and may be dropped off.

3. Loosen the lamp unit fixing screws (x3) counterclockwise until they turn freely, and then hold the handles of
    the lamp unit and remove it straight.

4. Push in the new lamp unit while paying attention to the insertion position and reverse the disassembly procedures,
    install the lamp unit cover.

・

If you are having difficulty attaching the lamp unit, remove it first and then push it in again slowly.

  Pushing it in quickly or forcibly may break the connector.
・

Projector does not turn on by protection circuit, if lamp unit or lamp unit cover are incompletely-installed.

1. The air filter is clogged with dust, causing the filter replacement message to appear on the screen and the FILTER 
     indicator to light in red. In this case perform maintenance.
2. The proceeds of the air filter clogging, becomes hot of projector inside, and TEMP indicator is lit , power shut down.
     Then FILTER Indicator remains red , TEMP indicator will flash (twice) red.
3. The cleaning and replacement cycle of the air filter unit varies depending on the usage environment.
     When the dust remains after cleaning, it is time to replace the air filter.
4. When replacing the lamp unit, it is recommended to replace the air filter as well.
     Replacement lamp unit  comes with air filter.

Lamp unit cover

Lamp unit cover fixing screw

Lamp unit 2

Handles

Lamp unit 1

Lamp unit 2 fixing screws

Fan power connector

Lamp unit 1 fixing screws

INF - 17

SECTION 1  SERVICE  INFORMATION

< DZ780/DW750/DX820 >

1. Make sure to turn off the power before replacing the air filter.
2. Remove the lamp unit cover.

・

Opening the lamp unit cover quickly may damage the cover.

・

If you loosen the lamp unit cover fixing screw with the projector
installed upward in the vertical direction, the lamp unit cover
may open on its weight and may be dropped off.

3. Pull out the air filter case from the projector.
4. Remove the air filter from the air filter case.

5. Vacuum dust from the air filter with a vacuum cleaner.

・

Do not use water when washing the air filter. Washing with 
water may decrease the dust absorption capability.

・

When the dust remains after cleaning, it is time to replace
the air filter.

6. Attach the air filter. 

1) Attach the air filter by aligning the marking ( △) on (W) and (Q) and inserting the tabs on the air filter to the air filter case.
2) Push in the air filter in the direction of the arrow, and fit the tabs securely.

7. Attach the air filter case and lamp unit cover, to the projector.

・

Make sure that the air filter case is properly attached before using the projector.

  If it is not attached, the projector will suck in dirt and dust causing a malfunction.
・

If you use the projector without attaching the air filter case, the filter indicator blinks in red and the message

  appears on the projected image for approximately 30 seconds.

Lamp unit cover

Lamp unit cover fixing screw

Air filter

Air filter case

Air filter

Tabs on the air filter

Tabs on the air filter

Tabs on the air filter

Air filter case

INF - 18

SECTION 1  SERVICE  INFORMATION

< DZ780/DW750/DX820 >

 

・

When installing the projector in a downward facing position, be sure to attach the supplied clasp to the lamp unit.

・

Using the projector without attaching the clasp may shorten the life of the lamp.

1. Place the clasp on the ventilation area on the lamp unit. (Fig. 1)
2. Press the bottom side of the clasp to slide it in. (Fig. 2)
3. Verify that the clasp’s tabs (left and right) fit securely on the outer frame of the ventilation area. (Fig. 3)

・

Do not press down on the metal mesh of the ventilation area. Doing so may result in deformation.

・

Remove the clasp from the lamp unit when switching the installation to an orientation other than downward-facing.

1. Use your nails, for example, to lift the tabs at their raised top edges.
2. Slide the clasp off of the ventilation area’s outer frame.

・

Do not lose the removed clasp, and store it safely.

30°

30°

Projection direction

Ventilation area

Clasp

Outer frame

Tab

Fig.1

Fig.2

Fig.3

INF - 19