Panasonic PT-LW375 / PT-LW335 / PT-LB425 / PT-LB385 / PT-LB355 / PT-LB305 (serv.man3) Service Manual ▷ View online
INF-5
SECTION 1 SERVICE INFORMATION
<LW375/LW335/LB425/LB385/LB355/LB305>
Note
f
After cleaning the air filter, reset the filter counter. Otherwise, the actual filter usage time cannot be confirmed.
f
Replace the air filter unit with the new optional Replacement Filter Unit (Model No.: ET-RFL300) if it is damaged or if the dirt
does not come off even after cleaning.
2. 2. Replacing the Unit
Lamp unit
The lamp unit is a consumable component. Refer to “When to replace the lamp unit” for details about the replacement cycle.
When purchasing the optional Replacement Lamp Unit (Model No.: ET-LAL510), consult your dealer.
Warning
Do not replace the lamp unit when it is hot. (Wait at least one hour after use).
The inside of the cover can become very hot, take care to avoid burn injuries.
Notes on the replacement of the lamp unit
f
A Phillips screwdriver is necessary when replacing the lamp unit.
f
Since the luminous lamp is made of glass, it may burst if dropped or hit with a hard object.
Handle with care.
f
Do not disassemble or modify the lamp unit.
f
When replacing the lamp unit, be sure to hold it by the handle because its surface is
pointed and its shape is protruded.
f
The lamp may rapture. Replace the lamp unit carefully so the glass fragments of the
lamp do not scatter. While attaching the projector to the ceiling, do not work right
under the lamp unit or do not conduct work while your face is near the lamp unit.
f
The lamp contains mercury. When disposing of used lamp units, contact your
local authorities or dealer for correct methods of disposal.
Attention
f
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.
Note
f
The model numbers of accessories and optional accessories are subject to change without prior notice.
When to replace the lamp unit
ENGLISH - 101
Attention
f
f
f
. If it is not attached, the projector will suck in
dirt and dust causing a malfunction.
Note
f
f
-RFL300) if it is damaged or if the dirt
does not come off even after cleaning.
Replacing the unit
Lamp unit
The lamp unit is a consumable component. Refer to “When to replace the lamp unit” for details about the replacement cycle.
When purchasing the optional Replacement Lamp Unit (Model No.: ET-LAL510), consult your dealer.
Warning
Do not replace the lamp unit when it is hot. (Wait at least one hour after use.)
The inside of the cover can become very hot, take care to avoid burn injuries.
Notes on the replacement of the lamp unit
f
A Phillips screwdriver is necessary when replacing the lamp unit.
f
Since the luminous lamp is made of glass, it may burst if dropped or hit with a hard object.
Handle with care.
f
Do not disassemble or modify the lamp unit.
f
When replacing the lamp unit, be sure to hold it by the handle because its surface is
pointed and its shape is protruded.
f
The lamp may rapture. Replace the lamp unit carefully so the glass fragments of the
lamp do not scatter. While attaching the projector to the ceiling, do not work right
under the lamp unit or do not conduct work while your face is near the lamp unit.
f
The lamp contains mercury. When disposing of used lamp units, contact your
local authorities or dealer for correct methods of disposal.
Attention
f
Panasonic takes no responsibility for any damage or malfunction of the product resulting from use of lamp units which are
Note
f
The model numbers of accessories and optional accessories are subject to change without prior notice.
When to replace the lamp unit
The lamp unit is a consumable component. Since its brightness gradually decreases over time, it is necessary to replace the
lamp unit regularly.
Please refer to the displayed time in [Lamp counter] of [Info.] about the usage time of lamp.
Please refer to the displayed time in [Lamp counter] of [Info.] about the usage time of lamp.
The estimated duration before replacement is 20 000 hours which is displayed in [Lamp counter], but the lamp may go
off before the time above mentioned has elapsed depending on individual lamp characteristics, usage conditions, and the
installation environment. It is recommended that the Replacement lamp unit be prepared earlier.
The time which is displayed in [Lamp counter] is a total time when the real usage time in [ (Normal)], [ (Eco)] or [
The time which is displayed in [Lamp counter] is a total time when the real usage time in [ (Normal)], [ (Eco)] or [
(Quiet)] is converted to the runtime in [ (Eco)]. Please note that they are not displayed individually.
The displayed time in [Lamp counter] = “Lamp runtime of [ (Normal)]” × 2 + “Lamp runtime of [ (Eco)]”
+ “Lamp runtime of [ (Quiet)]” × 2
The real usage time when the displayed time in [Lamp counter] is 20 000 hours means,
When [Lamp control] is constantly set to [ (Normal)] without switching to other modes = 10 000 hours
When [Lamp control] is constantly set to [ (Eco)] without switching to other modes = 20 000 hours
When [Lamp control] is constantly set to [ (Quiet)] without switching to other modes = 10 000 hours
If you continue to use the lamp unit after the displayed time in [Lamp counter] 22 000 hours has elapsed, the lamp turns off
automatically at approximately 10 minutes after turning on the power, as it will cause malfunction of the projector.
Chapter 6 Maintenance - Maintenance/replacement
INF-6
SECTION 1 SERVICE INFORMATION
<LW375/LW335/LB425/LB385/LB355/LB305>
The displayed time
in [Lamp counter]
On-screen display
<WARNING> indicator
Over 19 700 hours
less than 20 000
hours
f
The lamp replacement icon
is displayed for 10 seconds. If
you press any button within 10 seconds, the icon disappears.
f
The lamp replacement icon
will display for 4 seconds on
the screen after switching the input source or turning on the
projector.
--
Over 20 000 hours
less than 22 000
hours
f
The lamp replacement warning icon
is
displayed for 10 seconds. If you press any button within 10
seconds, the icon disappears.
f
The lamp replacement warning icon
will
display for 4 seconds on the screen after switching the input
source or turning on the projector.
Lighting in red. (The indicator will not
light in the standby mode)
Over 22 000 hours
f
The lamp replacement warning icon
is
displayed for 10 seconds. If you press any button within 10
seconds, the icon disappears.
f
The lamp replacement warning icon
will
display for 4 seconds on the screen after switching the input
source or turning on the projector.
f
The lamp automatically turns off at approximately 10
minutes after turning on the power.
Blinking in red. (The indicator will not
light in the standby mode)
Note
f
The lamp replacement icon or lamp replacement warning icon will not be displayed when during "Freeze" or "AV mute".
f
The usage period of 20 000 hours which is displayed in [Lamp counter] is a rough estimate and is not guaranteed.
Replacing the Lamp unit
Attention
Attention
f
When the projector is mounted on a ceiling, do not work with your face close to the projector.
f
Do not remove or loosen the screws other than specified ones when replacing the lamp unit.
f
Make sure to attach the lamp unit and the lamp cover securely.
1) Turn off the power by the procedure in “Powering Off the Projector” operating instructions.
Remove the AC power plug from the wall outlet.
f
Wait at least one hour and make sure the lamp unit and surroundings are cool.
2) Use a Phillips screwdriver to loosen the lamp cover fixing screw (×1) until it turns freely and remove the lamp
cover.
f
Remove the lamp cover by pulling it slowly toward the direction of the arrow as the above figure shown.
3) Use a Phillips screwdriver to loosen the three lamp unit fixing screws (×3) until they turn freely.
4) Hold the used lamp unit by its handles, and pull it gently from the projector.
5) Insert the new lamp unit in correct direction. Tighten the three lamp unit fixing screws (×3) securely with a
4) Hold the used lamp unit by its handles, and pull it gently from the projector.
5) Insert the new lamp unit in correct direction. Tighten the three lamp unit fixing screws (×3) securely with a
Phillips screwdriver.
f
When you experience difficulty in installing the lamp unit, remove it and try again. If you use force to install the lamp
unit, the connector may be damaged.
6) Attach the lamp cover. Tighten the lamp cover fixing screw (×1) securely with a Phillips screwdriver.
f
Perform step
2) in reverse direction to attach the lamp cover.
Lamp cover
Lamp cover
fixing screw
Handles
Lamp unit fixing
screws
INF-7
SECTION 1 SERVICE INFORMATION
<LW375/LW335/LB425/LB385/LB355/LB305>
Resetting the lamp counter
Be sure to reset the lamp counter after replacing the lamp unit.
1) Connect the power plug, press the power < v/b> button.
2) While pressing the a button on the control panel, press and hold the <INPUT/ENTER> button on the control
1) Connect the power plug, press the power < v/b> button.
2) While pressing the a button on the control panel, press and hold the <INPUT/ENTER> button on the control
panel for eight seconds or more.
f
The lamp counter is reset and the usage time of the luminous lamp becomes 0 hour. (At this time, there is displaying
nothing.)
3) Press the <INFO.> button on the remote control.
f
The [Info.] screen is displayed.
f
Make sure that the display of the [Lamp counter] is [0 H].
f
Please try step
2) again if the lamp counter has not been reset.
Note
f
After replacing the lamp unit, reset the lamp counter. Otherwise, the actual lamp usage time cannot be confirmed.
Air filter unit
When the dust remains after cleaning, the filter replacement timing has come.
The Replacement Filter Unit (Model No.: ET-RFL300) is an optional accessory. To purchase the product, consult your dealer.
Replacing the air filter unit
Attention
f
Make sure to turn off the power before replacing the air filter unit.
f
Make sure that the projector is stable, and perform the replacement 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.
f
Refer to “Removing the air filter unit” of item in the Operating Instructions.
2) Remove the air filter unit.
f
Refer to “Removing the air filter unit” of item in the Operating Instructions.
3) Attach the optional Replacement Filter Unit (Model No.: ET-RFL300) to the air filter cover.
f
Refer to “Attaching the air filter unit” of item in the Operating Instructions.
4) Attach the air filter cover to the projector.
f
Refer to “Attaching the air filter unit” of item in the Operating Instructions.
5) Reset the filter counter.
f
Refer to “Resetting the filter counter”of item in the Operating Instructions.
Attention
f
When using the projector, be sure to attach the air filter unit. If it is not attached, the projector will suck in dirt and dust
causing a malfunction.
f
The air filter unit to be replaced should be an unused product.
Note
f
The time until the air filter is clogged varies greatly depending on the usage environment.
f
When the projector is used without resetting the filter counter, the actual filter usage time will not be able to be confirmed.
INF-8
SECTION 1 SERVICE INFORMATION
<LW375/LW335/LB425/LB385/LB355/LB305>
2. 3. How to check the lamp runtime
The WARNING indicator will light in red when the lamp runtime (corresponding value) reaches 20 000 hours.
This is to indicate that lamp replacement is required. The lamp runtime is calculated by using the below formula.
The displayed time in [Lamp counter] = "Lamp runtime of [ (Normal)]" × 2 +"Lamp runtime of [ (Eco)]"
+ "Lamp runtime of [ (Quiet)]" × 2
When [Lamp control] is constantly set to [ (Normal)] without switching to other modes = 10 000 hours
When [Lamp control] is constantly set to [ (Eco)] without switching to other modes = 20 000 hours
When [Lamp control] is constantly set to [ (Quiet)] without switching to other modes = 10 000 hours
Follow the procedure below to check the lamp runtime:
1. Press and hold the
< v/b> button on the projector or the remote control for more than 20 seconds.
2. The projector runtime and lamp runtime will be displayed on the screen briefly as follows.
Total used time
Projector used time
Cumulative lamp
runtime in each
mode
*In this picture, "Eco1" and "Eco2" refer to "Eco" and "Quiet" respectively.
Counter
Projector
110 H
Lamp
Normal 60 H
Eco1 30 H
Eco2
20 H
Corresponding value 190 H
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