Panasonic PT-LW375 / PT-LW335 / PT-LB425 / PT-LB385 / PT-LB355 / PT-LB305 (serv.man3) Service Manual ▷ View online
INF-3
SECTION 1 SERVICE INFORMATION
<LW375/LW335/LB425/LB385/LB355/LB305>
2. Maintenance/Replacement
Before performing maintenance/replacement
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When you perform maintenance or replacement of the parts, make sure to turn off the power and disconnect the power plug
from the wall outlet.
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Be sure to observe the procedure "Powering Off the Projector" of Operating Instructions when performing power supply
operation.
2. 1. Maintenance
Outer Case
Wipe off dirt and dust using a soft dry cloth.
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If the dirt is persistent, soak the cloth with water and wring it thoroughly before wiping. Dry off the projector with a dry cloth.
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Do not use benzene, thinner, or rubbing alcohol, other solvents, household cleaners. Using them may cause deterioration of
the outer case.
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When using chemical treated dusters, follow its instruction.
Front glass surface of the lens
Wipe off the dirt and dust off the front surface of the lens with soft clean cloth.
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Do not use a cloth that has an abrasive surface or a cloth that is moist, oily, or covered with dust.
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Do not use excessive force when wiping the lens as it is fragile.
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Do not use benzene, thinner or rubbing alcohol, other solvents or household cleaners. Using them may cause deterioration of
the lens.
Attention
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The lens may be damaged if you hit with a hard object or wipe with excessive force. Please handle with care.
Air filter unit
Perform maintenance of the air filter in the following cases.
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If the time which is set in [Expand] menu → [Filter counter] is elapsed, the filter warning icon
will be dis-
played.
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If the air filter is clogged with dust, the power indicator <ON(G)/STANDBY(R)> blinks in orange, or the filter warning icon
will be displayed and after a while the projector is turned off automatically.
Attention
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Make sure to turn off the power before performing maintenance on the air filter unit.
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Make sure that the projector is stable, and perform the maintenance in a safe place where the unit will not be damaged even
if you drop the air filter unit
Removing the air filter unit
Air filter cover
Tabs
Fig.1
Fig.2
Hook
Hook
Air filter cover
Air filter unit
1) Remove the air filter cover. (Fig.1)
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Pull out the air filter cover from the hook of the projector while slightly pushing upward the tabs of the air filter cover and
open it in the direction of the arrow in figure.
2) Remove the air filter unit.
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The air filter unit is fixed by the three hooks. Grasp the fibre of the air filter unit near to the cover side with one hook and
then pull the air filter unit out from the air filter cover as arrow direction shown. (Fig.2)
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After removing the air filter unit, remove foreign objects and dust from the air filter compartment and the projector’s air
intake port if there are any.
INF-4
SECTION 1 SERVICE INFORMATION
<LW375/LW335/LB425/LB385/LB355/LB305>
Cleaning the air filter unit
Remove the air filter unit beforehand according to the previously described procedure in “Removing the air filter unit.
1) Clean the air filter unit.
● Vacuum dirt and dust from the air filter unit.
● Do not wash the air filter unit.
Attaching the air filter unit
1) Attach the unused air filter unit to the air filter cover.
● There is a distinction between the inside and outside of the air filter unit. Align the red mark on the air filter unit
with the red mark on the air filter cover.
● Insert the air filter unit to the side with the two hooks and then press the other side of the air filter unit into the
cover side with one hook.
2) Attach the air filter cover to the projector.
● Perform Step 1) in “Removing the air filter unit” of the operating instructions in the reverse order.
● Perform Step 1) in “Removing the air filter unit” of the operating instructions in the reverse order.
● Make sure that the air filter cover is closed tightly.
Resetting the filter counter
Be sure to reset the filter counter after cleaning the air filter unit.
1) Connect the power plug, press the power < v/b> button.
2) Press the <MENU> button to display the main menu, then press as to select [Expand].
3) Press the <INPUT/ENTER> button on the control panel or the <ENTER> button on the remote control, then
1) Connect the power plug, press the power < v/b> button.
2) Press the <MENU> button to display the main menu, then press as to select [Expand].
3) Press the <INPUT/ENTER> button on the control panel or the <ENTER> button on the remote control, then
press as to select [Filter counter].
4) Press the <INPUT/ENTER> button on the control panel or the <ENTER> button on the remote control, then
press as to select [Filter counter reset].
5) Press the <INPUT/ENTER> button on the control panel or the <ENTER> button on the remote control.
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The [Filter counter reset ?] confirmation message is displayed.
6) Press as to select [Yes], then press the <INPUT/ENTER> button on the control panel or the <ENTER> button on
the remote control.
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The [OK?] screen is displayed.
7) Press as to select [Yes], then press the <INPUT/ENTER> button on the control panel or the <ENTER> button on
the remote control.
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The filter counter is reset and the filter usage time becomes 0 hour.
Attention
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Do not disassemble the air filter unit.
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When attaching the air filter unit, make sure that the projector is stable, and work in an environment that is safe, even in the
event of the air filter unit dropping.
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Make sure that the air filter unit is properly attached before using the projector. If it is not attached, the projector will suck in
dirt and dust causing a malfunction.
Inside (Smooth fibre)
Outside (Cotton-like fibre)
Air filter cover
Air filter cover
Air filter unit
Red mark
Red mark
Hook
Hook
Air filter unit
INF-5
SECTION 1 SERVICE INFORMATION
<LW375/LW335/LB425/LB385/LB355/LB305>
Note
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After cleaning the air filter, reset the filter counter. Otherwise, the actual filter usage time cannot be confirmed.
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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
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A Phillips screwdriver is necessary when replacing the lamp unit.
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Since the luminous lamp is made of glass, it may burst if dropped or hit with a hard object.
Handle with care.
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Do not disassemble or modify the lamp unit.
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When replacing the lamp unit, be sure to hold it by the handle because its surface is
pointed and its shape is protruded.
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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.
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The lamp contains mercury. When disposing of used lamp units, contact your
local authorities or dealer for correct methods of disposal.
Attention
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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
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The model numbers of accessories and optional accessories are subject to change without prior notice.
When to replace the lamp unit
ENGLISH - 101
Attention
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. If it is not attached, the projector will suck in
dirt and dust causing a malfunction.
Note
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-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
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A Phillips screwdriver is necessary when replacing the lamp unit.
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Since the luminous lamp is made of glass, it may burst if dropped or hit with a hard object.
Handle with care.
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Do not disassemble or modify the lamp unit.
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When replacing the lamp unit, be sure to hold it by the handle because its surface is
pointed and its shape is protruded.
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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.
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The lamp contains mercury. When disposing of used lamp units, contact your
local authorities or dealer for correct methods of disposal.
Attention
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Panasonic takes no responsibility for any damage or malfunction of the product resulting from use of lamp units which are
Note
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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
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The lamp replacement icon
is displayed for 10 seconds. If
you press any button within 10 seconds, the icon disappears.
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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
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The lamp replacement warning icon
is
displayed for 10 seconds. If you press any button within 10
seconds, the icon disappears.
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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
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The lamp replacement warning icon
is
displayed for 10 seconds. If you press any button within 10
seconds, the icon disappears.
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The lamp replacement warning icon
will
display for 4 seconds on the screen after switching the input
source or turning on the projector.
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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
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The lamp replacement icon or lamp replacement warning icon will not be displayed when during "Freeze" or "AV mute".
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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
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When the projector is mounted on a ceiling, do not work with your face close to the projector.
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Do not remove or loosen the screws other than specified ones when replacing the lamp unit.
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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.
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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.
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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.
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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.
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Perform step
2) in reverse direction to attach the lamp cover.
Lamp cover
Lamp cover
fixing screw
Handles
Lamp unit fixing
screws
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