PT-DZ780, PT-DW750, PT-DX820, PT-DZ780BE, PT-DZ780LBE, PT-DZ780LWE, PT-DZ780WE, PT-DW750BE, PT-DX820BE, PT-DX820LBE (serv.man2) - Panasonic Projector Service Manual (repair manual). Page 25

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