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 23

SECTION 1  SERVICE  INFORMATION

< DZ780/DW750/DX820 >

1. The light source of the projector is a high-pressure mercury lamp.
2. The luminance of the lamp will decrease by duration of usage.
3. The lamp may burst with a loud sound or have its service life shortened because of shock, chipping, or degradation
     due to cumulative runtime.
4. The lamp life varies greatly depending on individual differences and usage conditions.
    In particular, frequent on/off switching of the power greatly deteriorate the lamp and affects the lamp life.
5. Continuous use for over one week will deteriorate the lamp. The degradation of the lamp due to continuous use can be
     reduced by using the [PROJECTOR SETUP] menu → [LAMP RELAY].
6. In rare cases, the lamps burst shortly after projection starts.
7. If the lamp bursts, gas contained inside of the lamp is released in the form of smoke.
8. The risk of bursting increases when the lamp is used beyond its replacement cycle.
    Make sure to replace the lamp unit regularly.
    It is recommended that you store the Replacement lamp unit as a contingency.

・

Panasonic takes no responsibility for any damage or malfunction of the product

  resulting from use of lamp units which are not manufactured by Panasonic. Use only specified lamp units.

・

Please be sure to read the warnings and notices on the lamp that is described in the Operating Instructions.

  "Read this first!",  "Precautions for use", "Maintenance/replacement"

1. Make sure that the air filter unit is properly attached before using the projector. If it is not properly attached, 
    the projector will suck in dirt and dust causing a malfunction.
2. The cleaning and replacement cycle of the air filter unit varies  depending on the usage environment.
3. Do not use water when cleaning the air filter. Washing with water may decrease the dust absorption capability.
4. The air filter for replacement is an optional accessory (service part).
    The optional Replacement lamp unit (ET‑LAD70, ET‑LAD70W) comes with one air filter.

1. The DLP chip is precision-made. Note that in rare cases, pixels of high precision could be missing or always lit.
    Note that such phenomena do not indicate malfunction.
2. Directing a high-power laser beam onto the projection lens surface can damage the DMD chip.

1. The lithium battery is used for the internal clock in the A-P.C.Board. So when it consumed it must be replaced.

2. After replacing the lithium battery, set the time zone, date, and time of the built-in clock of the projector.

[PROJECTOR SETUP] menu ⇒ [DATE AND TIME]

    Replacement lamp unit : ET‑LAD70 (1 pc) / ET‑LAD70W (2 pcs)

    Replacement air filter : TMZX5229

Lithium battery : CR2032

* Use only specified lithium battery.

* Used battery must be scrapped according to the instruction.

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