Panasonic LCD Projector Pt Tw342 Operating Instructions

							ENGLISH - 91
Chapter 6   Maintenance
This chapter describes methods of inspection when there are problems, ma\
intenance, and 
replacement of the units.  
						

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Power/Warning Indicators
When an indicator lights up
If a problem should occur inside the projector, the power indicator  and the warning indicator 
 will inform you by lighting or blinking. Check the status of the indicators and remedy the indicated problems as 
follows.
Attention
 
f Before you take a remedial measure, follow the procedure of switching the power of f indicated in “Powering Off the 
Projector” (x page 36).
Power indicator 
  Warning 
 
indicator
  Status
CauseSolution
Off OffThe power cord is 
unplugged. --
--
Red Lighting
OffThe power cord is plugged.
----
The projector is in standby 
mode after the cooling is 
completed. --
--
Lighting Lighting in red The replacement time of 
the lamp unit is displayed. 
(Standby mode)  
f The indicator lights up 
when the usage time of 
the lamp unit reaches   
6 000 hours (when 
[Lamp control] is set to   
[ 
 (Eco 1)]).  
f Replace the lamp 
unit.
Lighting Blinking in red It has exceed the replace
-
ment time of the lamp unit 
and the projector is turned 
off automatically.    
f The indicator blinks 
when the usage time of 
the lamp unit reaches   
6 600 hours (when 
[Lamp control] is set to   
[ 
 (Eco 1)]).
Blinking OffThe projector inside is 
cooling down and after 
a while, the projector is 
turned off. (The projector 
will enter into the standby 
mode) --
--
Power indicator 
Warning indicator  
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Power indicator 
  Warning 
 
indicator
  Status
CauseSolution
GreenLighting
OffProjecting. ----
Lighting Lighting in red The replacement time of 
the lamp unit is displayed. 
(Projecting)  
f Is the lamp 
replacement warning 
icon 
 
displayed when turn 
on or turn off the 
projector?
 
f The indicator lights up 
when the usage time of 
the lamp unit reaches   
6 000 hours (when 
[Lamp control] is set to   
[ 
 (Eco 1)]).  
f Replace the lamp 
unit.
Lighting Blinking in red It has exceed the replace
-
ment time of the lamp unit 
and the projector is turned 
off automatically.  
f The indicator blinks 
when the usage time of 
the lamp unit reaches   
6 600 hours (when 
[Lamp control] is set to   
[ 
 (Eco 1)]).
Blinking OffThe power cord is plugged 
and the lamp is turned off. 
[Power management] is 
set to [Ready].
--
--
OrangeLighting
OffThe projector detects an 
abnormal condition and 
cannot be turned on. 
(Warning)
--
 
f If the projector is 
turned off, unplug the 
AC power cord and 
contact the dealer.
Lighting LightingThere is a problem in the 
contrast shutter circuit for 
iris. (Warning)
--
 
f Turn off the projector, 
unplug the AC power 
cord and contact the 
dealer.
Blinking BlinkingThe lamp or the power 
supply for the lamp detects 
an abnormal condition, the 
projector cannot be turned 
on. (Warning)  
f Have you turned 
on the power again 
immediately after 
turning it off?  
f Wait a while until the 
luminous lamp cools 
off, and then turn on 
the power.
 
f There is a problem in 
the lamp circuit. Have 
the source voltage 
been changed? (Drop)    
f Turn off the projector, 
and unplug the AC 
power cord, and 
consult your dealer.
Blinking OffInternal temperature is 
high. (Warning)
When the internal 
temperature rises further 
and the air filter warning 
icon 
 *1 
is displayed on the 
screen, after a while the 
projector can be turned off 
automatically.  
f Is the air intake/
exhaust port blocked?
 
f Is the room 
temperature high?
 
f Is the air filter unit 
clogged?  
f Remove any objects 
that are blocking the 
air intake/ exhaust 
port.
 
f Install the projector 
in a location with an 
ambient temperature 
of 5 °C (41 °F) to 40 
°C (104 °F).
 
f Do not use the 
projector at high 
altitudes of  
3 000 m (9 843') or 
higher above sea 
level.
 
f Clean the air filter 
unit or replace it. 
*1  Regardless of the time which is set in [Expand] → [Filter counter], the air filter warning icon  is displayed due 
to the internal temperature rising, and it will be displayed 10 seconds \
every 
five minutes if the temperature does not go down.
Note
 
f If the warning indicator  persists to light or blink after taking these measurements such as turn off the projector, 
unplug the power cord, please contact your dealer for repair services. 
 
f If the power indicator  persists to light or blink in orange after taking these measurements such as 
turn off the projector, unplug the power cord, please contact your dealer for repair services.\
 
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Maintenance/replacement
Before performing maintenance/replacement
 
f When you perform maintenance or replacement of the parts, make sure to turn of f the power and disconnect the power plug 
from the wall outlet. (x page 36)
 
f Be sure to observe the procedure “Powering Off the Projector” (x page 36) when performing power supply operation.
Maintenance
Outer Case
Wipe off dirt and dust using a soft dry cloth.
 
f If the dirt is persistent, soak the cloth with water and wring it thorou\
ghly before wiping. Dry off the projector with a dry cloth.
 
f Do not use benzene, thinner, or rubbing alcohol, other solvents, household cleaners. Using them may cause deterioration of 
the outer case.
 
f 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.
 
f Do not use a cloth that has an abrasive surface or a cloth that is moist\
, oily, or covered with dust.
 
f Do not use excessive force when wiping the lens as it is fragile.
 
f Do not use benzene, thinner or rubbing alcohol, other solvents or household cleaners. Using them may cause deterioration 
of the lens.
Attention
 
f The lens is made of glass. Impacts or excessive force when wiping may scratch its surface.  
Please handle with care.
Air filter unit
Perform maintenance of the air filter in the following cases.
 
f If the time which is set in [Expand] menu → [Filter counter] is elapsed, the filter warning icon 
 will be 
displayed. 
 
f If the air filter is clogged with dust, the power indicator  blinks in orange, or the filter warning icon will 
 be displayed and after a while the projector is turned off automatically.
Attention
 
f Make sure to turn off the power before performing maintenance on the air filter unit.
 
f 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)
 
f 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.
 
f 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)
 
f 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.
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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.
 
f Vacuum dirt and dust from the air filter unit.
 
f Do not wash the air filter unit.
Attaching the air filter unit
1)  Attach the new air filter unit to the air filter cover.
 
f 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. 
Air filter unit
Inside (Smooth fibre)
Outside (Cotton-like fibre) Air filter cover
Red mark
 
f 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.
Hook Hook
Air filter cover
Air filter unit
Red mark
2) 
Attach the air filter cover to the projector.
 
f Perform Step 1) in “Removing the air filter unit” ( x page 94) in the reverse order.
 
f 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 on the control panel or on the remote control.
2)  Press the  button to display the main menu, then press  as to select [Expand].
3)  Press the  button on the control panel or the  butto\
n on the remote control, 
then press as to select [Filter counter].
4)  Press the  button on the control panel or the  butto\
n on the remote control, 
then press as to select [Filter counter reset].
5)  Press the  button on the control panel or the  butto\
n on the remote control.
 
f The [Filter counter reset ?] confirmation message is displayed. 
6)  Press as to select [Yes], then press the  button on the control panel or the 
 button on the remote control.
 
f The [OK?] screen is displayed.
7)  Press as to select [Yes], then press the  button on the control panel or the 
 button on the remote control.
 
f The filter usage time is 0 after reset.
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Attention
 
f Do not disassemble the air filter unit.
 
f 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.
 
f 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.
Note
 
f After cleaning the air filter, reset the filter counter. Otherwise, the warning icon  will appear on screen.
 
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.
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 -LAL500), 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 inj\
uries.
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 fragm\
ents   
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 p\
roduct 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
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 ( x page 73).
The estimated duration before replacement is 6 000 hours which is displayed in [Lamp counter], but the lamp may go of f 
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 un\
it be prepared earlier. 
The time which is displayed in [Lamp counter] is a total time when the real usage time in [ 
 (Normal)], [  (Eco 1)] or [  
(Eco 2)] is converted to the runtime in [ 
 (Eco 1)]. Please note that they are not displayed individually.
The displayed time in [Lamp counter] = “Lamp runtime of [ 
 (Normal)]” × 1.2 + “Lamp runtime of [  (Eco 1)]” 
+ “Lamp runtime of [ 
 (Eco 2)]” × 0.6
The real usage time when the displayed time in [Lamp counter] is 6 000 hours means, 
When [Lamp control] is constantly set to [ 
 (Normal)] without switching to other modes = 5 000 hours  
When [Lamp control] is constantly set to [ 
 (Eco 1)] without switching to other modes = 6 000 hours  
When [Lamp control] is constantly set to [ 
 (Eco 2)] without switching to other modes = 10 000 hours
If you continue to use the lamp unit after the displayed time in [Lamp counter] 6 600 hours has elapsed, the lamp turns of f 
automatically at approximately 10 minutes after turning on the power , as it will cause malfunction of the projector.
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The displayed time in [Lamp  counter] On-screen display
 indicator
Over 5 700 hours  less than 6 000  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 6 000 hours  less than 6 600  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 6 600 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 “A V mute”.
 
f The usage period of 6 000 hours which is displayed in [Lamp counter] is a rough estimate and is not guaranteed.
Replacing the Lamp unit
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 following the procedure in "Power Off the Projector\
" ( x page 36). 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 proj\
ector.
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 sc\
rewdriver.
 
f Perform step 2) in reverse direction to attach the lamp cover. Lamp cover
Lamp cover 
fixing screw Handles
Lamp 
unit fixing 
screws
AC IN 
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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 on the control panel or on the remote control.
2)  While pressing the ▲ button on the control panel, press and hold the  button on the 
control panel for eight seconds or more.
 
f The lamp counter will be reset to 0. (At this time, there is displaying nothing.)
3)  Press the  button on the remote control.
 
f The [Info.] screen is displayed.
 
f To make sure that the display of the [Lamp counter] is reset to [0 H].
 
f Please try step 2) again if the lamp counter has not been reset.
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” ( x page 94). 
2) Remove the air filter unit.
 
f Refer to “Removing the air filter unit” ( x page 94). 
3) Attach the optional Replacement Filter Unit (Model No.: ET -RFL300) to the air filter cover.
 
f Refer to “Attaching the air filter unit” (x page 95).
4)  Attach the air filter cover to the projector.
 
f Refer to “Attaching the air filter unit”  (x page 95).
5) Reset the filter counter.
 
f Refer to “Resetting the filter counter” ( x page 95).
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 replacement cycle of the air filter unit varies greatly depending on the usage environment.
 
f After replacing the air filter, reset the filter counter. Otherwise, the warning icon 
 will appear on screen.
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Troubleshooting
Please check following points. For details, see the corresponding pages.
ProblemCauseReference 
page
Power does not turn 
on.  
f The power cord may not be connected.
 
f No electric supply is at the wall outlet.
 
f The circuit breakers have tripped.
 
f Is the power indicator  or the warning indicator 
 indicator lit or blinking?
 
f The lamp cover has not been securely installed. —
—
—
92
97
No picture appears.  
f The video signal input source may not be connected to a terminal properl\
y.
 
f The input selection setting may not be correct.
 
f The [Brightness] adjustment setting may be at the minimum setting.
 
f The input source which is connected to the projector may have a problem.\
 
f The AV mute function may be in use. 30
38, 48 52—
40
The picture is fuzzy.  
f The lens focus may not have been set correctly.
 
f The projector may not be at the correct distance from the screen.
 
f The lens may be dirty.
 
f The projector may be tilted too much. 37
27
15
—
The color is pale or 
grayish.  
f [Color] or [Tint] adjustment may be incorrect.
 
f The input source which is connected to the projector may not be adjusted\
 
correctly.
 
f RGB cable is damaged. 53
—
—
No sound from the 
internal speaker.  
f The input terminals may not have been correctly connected.
 
f The volume may have been set to the minimum level.
 
f The AV mute function may have been turned on.
 
f When the VARIABLE AUDIO OUT is plugged-in, the projector's built-in speaker 
is not available.
 
f The Mute function may have been turned on. 31
41, 57 40
30 
41, 57
The remote control 
does not operate.  
f The batteries may be weak.
 
f The batteries may not have been inserted correctly. —
24
 
f The remote control signal receptor on the projector may be obstructed. 21
 
f The remote control unit may be out of the operation range. 21
 
f Strong light such as fluorescent shine onto the signal receptor. 21
 
f Is the operation of the remote control set to disabled in [Key lock] of the [Setting] 
menu? 57
 
f When different codes are set on the projector and on the remote control. 42
The control buttons of 
the projector do not 
operate.  
f Is the operation of the control panel set to disabled in [Key lock] of the [Setting] 
menu? 57
The picture does not 
display correctly.  
f There may be a problem with the VCR or other signal source.
 
f A signal which is not compatible with the projector is being input.
 
f Is the setting of the computer output correct? —
105 —
Picture from a 
computer does not 
appear.  
f The cable may be longer than the optional cable.
 
f The external video output from a laptop computer may not be correct.  —
—
Picture from a HDMI 
device does not 
appear or picture is 
not stable.  
f Is the HDMI cable securely connected?
 
f Turn off the power of the projector and the connected devices. Then turn the 
power of the projector and the connected devices back on.
 
f Isn't unsupported signal cable connected? 30 
—
105
No sound is output 
from a HDMI device.  
f Set the sound channel of the attached device to Linear PCM. —
 
f Connect the computer to the  terminal through the HDMI-DVI 
conversion cable, set [Sound] of [HDMI Setup] to [Computer], and then input the   
analog audio signal to the  terminal.    32, 58
The 
 mark appears 
on the screen.  
f To inform that the projector cannot execute the operation. Check the connections 
and the input signals, then operate correctly. —
Attention
 
f If the problem persists, after confirming the contents of the table, please consult your dealer .
Chapter 6   Maintenance - Troubleshooting  
						

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Chapter 7   Appendix
This chapter describes specifications and after-sales service for the projector.