Panasonic PT-VW431DU / PT-VW431DE / PT-VW431DEA (serv.man2) Service Manual ▷ View online
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Replacing the lamp unit
Maintenance
CAUTION:
• When the projector is mounted on a ceiling, do not work with your
face close to the projector.
• Attach the lamp unit and the lamp cover securely.
• When you experience difficulty in installing the lamp, remove it and
try again. If you use force to install the lamp, the connector may be
damaged.
• Do not use other than designated lamp units.
• Do not loosen other than designated screws.
1) Turn off the projector. Unplug the AC power cord. Wait at least
1 hour and make sure the lamp unit and surroundings are
cool.
2) Use a Phillips screwdriver to loosen the lamp cover fixing
screw and remove the lamp cover.
• Remove the lamp cover by pulling it slowly toward the direction
of the arrow.
3) Use a Phillips screwdriver to loosen the three lamp unit fixing
screws until the screws turn freely. Hold the used lamp unit
by its handles, and pull it gently from the projector.
4) Insert the new lamp unit in correct direction. Tighten the three
lamp unit fixing screws securely with a Phillips screwdriver
5) Attach the lamp cover, and tighten the lamp cover fixing screw
securely with a Phillips screwdriver.
• Attach the lamp cover by pushing it slowly opposite the direction
of the arrow.
Note
• When you replace the new lamp unit, the projector resets the total
usage time of the lamp unit automatically.
Lamp cover
Handle
Lamp unit fixiing screws
Lamp unit
Lamp cover
fixing screw
Lamp unit
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Maintenance
The LAMP indicator will light yellow when the total lamp used time (Corresponding value) reaches 2,500 hours. This
is to indicate that lamp replacement is required. The total lamp used time is calculated by using the below expres-
sion.
Total lamp used time (Corresponding value) =
T
normal +
T
eco x 0.625
T
normal : used time in the normal mode
T
eco
: used time in the eco mode
You can check the lamp used time following to the below procedure.
1
Press and hold the
button on the projector or the remote control for more than 20 seconds.
2
The projector used time and lamp used time will be displayed on the screen briefly as follows.
If the non-standard lamp is used, the warning and confirmation messages will appear on the screen every startup.
Some of the functions are limited when the non-standard lamp is used in spite of the warning.
Since the lamp is not standard,
projector failed to read lamp data.
Continue to use this lamp?
Yes
No
Warning message on the non-standard lamp used
How to check lamp runtime
Counter
Projector
650H
Lamp
Normal
250H
Eco
400H
Corresponding value 500H
Total lamp used time
Projector used time
Cumulative
lamp operat-
ing time in
each mode.
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Maintenance
Cleaning
Cleaning the projection lens
Unplug the AC power cord before cleaning.
Gently wipe the projector body with a soft dry cleaning cloth. When
the cabinet is heavily soiled, use a small amount of mild detergent and
finish with a soft dry cleaning cloth. Avoid using an excessive amount
of cleaner. Abrasive cleaners, solvents or other harsh chemicals might
scratch the surface of the cabinet.
When the projector is not in use, put the projector in an appropriate car-
rying case to protect it from dust and scratches.
Cleaning the projector cabinet
Cleaning with air spray
Remove the cabinet top following to “Mechanical Disassembly”. Clean up the LCD panel and polarizing plate by
using the air spray from the cabinet top opening.
Caution:
Use a commercial (inert gas) air spray designed for cleaning camera and computer equipment. Use a resin-based
nozzle only. Be very careful not to damage optical parts with the nozzle tip. Never use any kind of cleanser on the
unit. Also, never use abrasive materials on the unit as this may cause irreparable damage.
Disassembly Cleaning
Disassembly cleaning method should only be performed when the unit is considerable dirty and cannot be
sufficiently cleaned by air spraying alone.
Be sure to readjust the optical system after performing disassembly cleaning.
1. Remove the cabinet top and main units following to “Mechanical Disassembly”.
2. Remove the optical base top following to “Optical Unit Disassembly”. If the LCD panel needs cleaning, remove
the LCD panel unit following to “LCD panel replacement”.
3. Clean the optical parts with a soft cloth. Clean extremely dirty areas using a cloth moistened with alcohol.
Caution:
The surface of the optical components consists of multiple dielectric layers with varying degrees of refraction. Never
use organic solvents (thinner, etc.) or any kind of cleanser on these components.
Since the LCD panel is equipped with an electronic circuit, never use any liquids (water, etc.) to clean the unit. Use
of liquid may cause the unit to malfunction.
Unplug the AC power cord before cleaning.
Gently wipe the projection lens with a cleaning cloth that contains
a small amount of non-abrasive camera lens cleaner, or use a lens
cleaning paper or commercially available air blower to clean the lens.
Avoid using an excessive amount of cleaner. Abrasive cleaners, sol-
vents, or other harsh chemicals might scratch the surface of the lens.
After long periods of use, dust and other particles will accumulate on the LCD panel, prism, mirror, polarized
glass, lens, etc., causing the picture to darken or color to blur. If this occurs, clean the inside of optical unit.
Remove dust and other particles using air spray. If dirt cannot be removed by air spray, disassemble and clean
the optical unit.
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This projector provides security functions such as "Key lock", "PIN code lock" and "Logo PIN code lock". When the
projector has set these security function on, you are required to enter correct PIN code to use the projector. If you
do not know the correct PIN code to the projector, the projector can no longer be operated or started. In this case,
you must reset those function first according to the resetting procedure described below and then check up on the
projector.
Security Function Notice
1. Disconnect the AC power cord from the AC outlet.
2. As pressing the
ENTER button, connect the AC power cord into an AC outlet again.
3. Keep pressing the
ENTER button and then press the
button.
4. Release the
button first and then release the
ENTER button.
- The PIN code lock and Logo PIN code lock will be reset as the initial PIN code at the factory and
the key lock function is disabled.
Please refer to the owner's manual for further information of the security functions.
Function
Description
Key lock
Locks operation of the top control or the remote con-
trol.
If the Key lock is enabled with top control lock, the pro-
jector can no longer be started.
Initial setting: Key lock function is disabled
PIN code lock
Prevents the projector from being operated by an un-
authorized person.
Initial code: “1234”
Logo PIN code lock
Prevents an unauthorized person for changing the
start-up logo on the screen.
Initial code: “4321”
Resetting procedure
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