Panasonic DLP Projector PT-DZ780 PT-DW750 PT-DX820 Operating Instructions

							ENGLISH - 161
Chapter 5 Maintenance
This chapter describes methods of inspection when there are problems, ma\
intenance, and replacement of the 
components.  
						

							Chapter 5 Maintenance — Lamp/temperature/filter indicators
162 - ENGLISH
Lamp/temperature/filter indicators
When an indicator lights up
If a problem should occur inside the projector, the lamp indicators /, the temperature indicator 
, and the filter indicator  will inform you by lighting or blinking. Check the status of the indicators 
and manage the indicated problems as follows.Attention
 f When switching of f the projector to deal with problems, make sure to follow the procedure in “Switching of f the projector” (x   page   61).
Lamp indicator 
Lamp indicator  Temperature indicator 
Filter indicator 
Lamp indicators /
Indicator status Lighting in red/lighting in 
orange*1Blinking in red(1 time) Blinking in red
(3 times)
Status Time to replace the lamp 
unit. (x
 
page
 
166) The lamp unit is not 
attached. A problem is detected in the lamp or the power supply for 
the lamp.
Cause
 f W

as [REPLACE LAMP] 
displayed when you 
turned on the power?
 f The indicator lights up 
when the runtime of 
the lamp unit reaches 
3

 
800 hours (when 
[LAMP POWER] is set to 
[NORMAL]).
 f Is the lamp unit attached? fHave you turned on the 
power again immediately 
after turning it of

f?
 fSome error has occurred 
in the lamp circuit. Check 
for fluctuation (or drop) in 
the source voltage.
Solution
 f Replace the lamp unit.
 fAttach the lamp unit if it is 
not attached.
 fIf the indicator is still 
blinking in red even when 
the lamp unit is attached, 
consult your dealer

.
 fW

ait a while until the 
luminous lamp cools 
off, and then turn on the 
power.
 f T

urn the  
switch to  
(x
  page   61), and 
consult your dealer.
*1 The indicator lights up in red while the lamp is turned of f, and lights up in orange while the lamp is turned on.
Note
 fIf the lamp indicators / are still lit or blinking after taking the measures, ask your dealer for repair . fThe lamp indicator corresponding to the lamp being lit will light up in \
green if the projector is in projection mode and there is no indication \
of 
problem by lighting or blinking in red or orange.  
						

							Chapter 5 Maintenance — Lamp/temperature/filter indicators
ENGLISH - 163
Temperature indicator 
Indicator statusLighting in red Blinking in red
(2 times) Blinking in red
(3 times)
Status Warm-up status Internal temperature is high 
(warning).Internal temperature is high 
(standby status).The cooling fan has 
stopped.
Cause
 f Did you turn on the power 
when the temperature 
was low (around 0

  °C 
(32
  °F))?
 fIs the air intake/exhaust port blocked?
 fIs the room temperature high?
 fIs the filter indicator  lit?―
Solution
 f W

ait at least 10 minutes in 
the current status.
 f Install the projector in a 
location with the operating 
environment temperature 
between 0

  °C (32   °F) and 
45
  °C (113   °F)
*1.
 fRemove any objects that are blocking the air intake/
exhaust port.
 fInstall the projector in a location with the operating 
environment temperature between 0
   °C (32   °F) and 
45   °C (113   °F)
*1.
 f
Do not use the projector at high altitudes of 2

  700   m 
(8
 
858') or higher above sea level.
 f Clean or replace the air filter

. (x   page   164)
 fT
 urn the  
switch to  
(x   page   61), and 
consult your dealer.
*1 When using the projector at high altitudes (between 1   400   m (4   593') and 2   700   m (8   858') above sea level), the operating environment temperature 
should be between 0   °C (32   °F) and 40   °C (104°F).
Note
 fIf the temperature indicator  is still lit or blinking after taking the measures, ask your dealer for repair . fIf you use the projector with the following two settings, the light output may be reduced by approx. 20
  % to protect the projector when the 
operating environment temperature becomes 40
  °C (104   °F) or higher (35   °C (95   °F) or higher when used at high altitude).
 gWhen [LAMP

 SELECT] is set to [DUAL] from the menu
 gWhen [LAMP

 POWER] is set to [NORMAL] from the menu
Filter indicator 
Indicator status Lighting in red Blinking in red
Status The filter is clogged.
The temperature inside or outside the projector is abnormally high. The air filter case is not attached.
Cause
 f Is the air filter dirty? fIs the air intake/exhaust port 
blocked? fIs the air filter case attached?
Solution
 f Clean or replace the air filter

. 
(x
  page   164)
 fRemove any objects that are 
blocking the air intake/exhaust port. fAttach the air filter case.
Note
 fIf the filter indicator  is still lit or blinking after taking the measures, ask your dealer for repair . fIf the air filter case is not attached when the projector is switched on, the filter indicator  blinks in red.  
						

							Chapter 5 Maintenance — Maintenance/replacement
164 - ENGLISH
Maintenance/replacement
Before performing maintenance/replacement
 fMake sure to turn of f the power before performing maintenance/replacement. ( x pages 55, 61)
 fWhen switching of

f the projector, make sure to follow the procedures in “Switching off the projector” 
(x
  page   61).
Maintenance
Outer case
Wipe off dirt and dust with a soft, dry cloth.
 fIf the dirt is persistent, soak the cloth with water and wring it thorou\
ghly before wiping. Dry of

f the projector with 
a dry cloth.
 f Do not use benzene, thinner

, or rubbing alcohol, other solvents, or household cleaners. Doing so ma\
y 
deteriorate the outer case.
 f When using chemically treated dust cloths, follow the instructions writt\
en on its packaging.
Lens front surface
Wipe off dirt and dust from the front surface of the lens with a soft clean clo\
th.
 fDo not use a cloth that is fluf

fy, dusty, or soaked with oil/water.
 fSince the lens is fragile, do not use excessive force when wiping the lens.
Attention
 f The lens is made of glass. Impacts or excessive force when wiping may scratch its surface. Handle with care.
Air filter
Perform maintenance of the air filter in the following case.
 fThe air filter is clogged with dust, causing the filter replacement message to appear on the screen and the filter 
indicator  to light in red.
Removing the air filter
(a)
Lamp unit cover
Lamp unit cover fixing screwFig. 1 Air filter
Fig. 2 Fig. 3
Air filter case Air filter
1) Remove the lamp unit cover
. (Fig. 1)
 fUse a Phillips screwdriver to turn the lamp unit cover fixing screw (x1) counterclockwise until it turns freely , 
and open the lamp unit cover slowly in the direction of the arrow

.
 fOpening the lamp unit cover quickly may damage the cover

.
 fIf you loosen the lamp unit cover fixing screw with the projector installed upward in the vertical direction, the 
lamp unit cover may open on its weight and may be dropped of

f.
2)
 
Pull out the air filter case. (Fig. 2)
 fPull out the air filter case from the projector

.  
						

							Chapter 5 Maintenance — Maintenance/replacement
ENGLISH - 165
3) Remove the air filter from the air filter case. (Fig. 3)
 fHold (a) of the air filter

, pull up the air filter while pushing in the direction of the arrow .
Cleaning the air filter
Remove the air filter beforehand with the previously described procedure of “Removing the air filter”.
1) Clean the air filter .
 fV

acuum dust from the air filter with a vacuum cleaner.
Attaching the air filter
(b)
(a)
Fig. 1 Fig. 2
Tabs on the air filter
Tabs on the air filter
Tabs on the air filter
Air filter case
1) Attach the air filter
.
i)  
Attach the air filter by aligning the marking ( A

) on (a) and (b) and inserting the tabs on the air filter to the air 
filter case. (Fig. 1 )
ii)
 
Push in the air filter in the direction of the arrow
 , and fit the tabs securely. (Fig. 2)
2)
 
Attach the air filter case to the projector
 .
 fInsert the air filter case all the way in.
3)

 
Attach the lamp unit cover
 .
 fPerform Step 

1) in “Removing the air filter” in the reverse order to close the lamp unit cover .
 fAttach the lamp unit cover so that the connector on the lamp unit cover is inserted to the fan power 
connector securely

.
 fUse a Phillips screwdriver to firmly tighten the lamp unit cover fixing screw (x1).
 fMake sure to attach the lamp unit cover securely

.
Note
 f Make sure that the air filter case is properly attached before using the projector . If it is not attached, the projector will suck in dirt and dust 
causing a malfunction.
 f If you use the projector without attaching the air filter case, the filter indicator  blinks in red and the message appears on the 
projected image for approximately 30 seconds.
 f Do not use water when washing the air filter

. Washing with water may decrease the dust absorption capability.
 fWhen the dust remains after cleaning, it is time to replace the air filter .
The air filter for the replacement (TMZX5229) is an optional accessory (service part).  T

o purchase the product, consult your dealer.
The optional Replacement lamp unit (Model No.: ET
-

LAD70 (1   pc), ET
-
 LAD70W (2   pcs)) comes with one air filter.  
						

							Chapter 5 Maintenance — Maintenance/replacement
166 - ENGLISH
Replacement
Lamp unit
The lamp unit is a consumable component. Refer to “When to replace the lamp unit” (x   page   166) for details 
about the replacement cycle.
When purchasing the optional Replacement lamp unit (Model No.: ET
-

LAD70 (1   pc), ET
-
 LAD70W (2   pcs)), consult 
your dealer.
It is recommended that you request a qualified technician to replace the lamp unit. Consult your dealer .
WARNING
Replace the lamp unit after the lamp has cooled (after waiting at least\
 one hour).
The high temperature inside the cover will cause burns.
Checking the lamp unit to be replaced
1)  
Check the status of the lamp indicators /.
 f The lamp unit corresponding to the lamp indicator that is lit in red is required to be replaced.
Notes on the replacement of the lamp unit
 f A

 Phillips screwdriver is necessary when replacing the lamp unit.
 fSince the luminous lamp is made of glass, it may burst if dropped or hit with a hard object. Handle with care.
 fDo not disassemble or modify the lamp unit.
 fWhen replacing the lamp unit, be sure to hold it by the handle because i\
ts surface is pointed and its shape is 
protruded.
 fThe lamp may rapture. Replace the lamp unit carefully so that the glass \
fragments of the lamp do not scatter

. 
While attaching the projector to the ceiling, do not work right under th\
e 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 d\
ealer 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
 fThe 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. The estimated duration before replacement is 4
  000 hours, but the lamp may go 
off before reaching to 4
  000 hours, depending on the characteristics of the individual lamp, usag\
e conditions, and 
the installation environment. It is recommended that the Replacement lam\
p unit be prepared earlier.
If you continue to use the lamp unit after 4
  000 hours has elapsed, the lamp turns off automatically after 
approximately 10 minutes, as it may cause malfunction of the projector .
On-screen display
REPLACE LAMP
Lamp indicator
Over 3 800 hoursThe message is displayed for 30 seconds. Pressing 
any button on the control panel or remote control 
within 30 seconds will clear the message.
The indicator lights in red even during the standby 
mode. (Only the corresponding lamp lights on.)
Over 4
  000 hours The message remains displayed until you press any 
button.  
						

							Chapter 5 Maintenance — Maintenance/replacement
ENGLISH - 167
Note
 fTo predict when to replace the lamp, check the lamp runtime displayed on [LAMP1] and [LAMP2] in [STATUS] (x   page   122). f4
  000 hours is a rough estimate for replacement, and not a guaranteed time\
.
How to replace the lamp unit
Attention
 f When the projector is mounted on the ceiling, do not conduct work while \
your face is near the lamp unit. fMake sure to attach the lamp unit and the lamp unit cover securely . fIf you are having difficulty attaching the lamp unit, remove it first and then push it in again slowly . Pushing it in quickly or forcibly may break 
the connector

.
Fig. 1 Fig. 2
Lamp unit cover
Lamp unit cover fixing screw Lamp unit 2
Handles
Lamp unit 1
Lamp unit 2 fixing screws Fan power connector
Lamp unit 1 fixing screws
1) Set the  switch to  and disconnect the power plug from \
the power outlet.
 f W

ait at least one hour and check if the lamp unit has cooled down.
2)
 
Remove the lamp unit cover
 . (Fig. 1)
 fUse a Phillips screwdriver to turn the lamp unit cover fixing screw (x1) counterclockwise until it turns freely , 
and open the lamp unit cover slowly in the direction of the arrow

.
 fOpening the lamp unit cover quickly may damage the cover

.
 fIf you loosen the lamp unit cover fixing screw with the projector installed upward in the vertical direction, the 
lamp unit cover may open on its weight and may be dropped of

f.
3)
 
Remove the lamp unit. (Fig. 2)
 fUse a Phillips screwdriver to turn the lamp unit fixing screws (x3) counterclockwise until they turn freely , and 
then remove the lamp unit.
 f Hold the handles of the lamp unit and remove it straight.
4)

 
Push in the new lamp unit while paying attention to the insertion positi\
on.
 fIf you are having difficulty attaching the lamp unit, remove it first and then push it in again slowly . Pushing it 
in quickly or forcibly may break the connector

.
5)
 
Use a Phillips screwdriver to firmly tighten the lamp unit fixing screws\
 (x3 each).
 fMake sure to attach the lamp unit securely

.
6)
 
Attach the lamp unit cover
 .
i)
 
Perform Step 
 2) in the reverse order to close the lamp unit cover.
 fAttach the lamp unit cover so that the connector on the lamp unit cover is inserted to the fan power 
connector securely

.
ii)
 
Use a Phillips screwdriver to firmly tighten the lamp unit cover fixing screw (x1).
 fMake sure to attach the lamp unit cover securely

.
Note
 f When you replace the lamp unit with new one, the projector resets the ru\
ntime of the lamp unit automatically .  
						

							Chapter 5 Maintenance — Maintenance/replacement
168 - ENGLISH
Air filter
When the dust remains after cleaning, it is time to replace the air filter.
The air filter for the replacement (TMZX5229) is an optional accessory (service part).  To purchase the product, 
consult your dealer.
When replacing the lamp unit, it is recommended to replace the air filter as well.
The optional Replacement lamp unit (Model No.: ET
-

LAD70 (1   pc), ET
-
 LAD70W (2   pcs)) comes with one air filter.
How to replace the air filter
Attention
 f Make sure to turn of f the power before replacing the air filter. fWhen 
attaching the air filter, make sure that the projector is stable, and perform the replacement in a safe place even if you drop the air filter.
1) Remove the air filter .
 fRefer to “Removing the air filter” ( x

  page   164).
2)
 
Replace the air filter with the new one and attach the air filter case t\
o the projector
 .
 fRefer to “Attaching the air filter” (

x   page   165).
Attention
 f Before switching on the projector , make sure that the air filter is attached. If it is not attached, the projector will suck in dirt and dust causing 
a malfunction.
 f If you use the projector without attaching the air filter case, the filter indicator  blinks in red and the message appears on the 
projected image for approximately 30 seconds.  
						

							Chapter 5 Maintenance — Troubleshooting
ENGLISH - 169
Troubleshooting
Review the following points. For details, see the corresponding pages.
ProblemsPoints to be checked Page
Power does not turn on.
 f Is the power plug firmly inserted into the outlet? ―
 fIs the  switch set to ? 61
 fIs the wall outlet supplying electricity? ―
 fHave the circuit breakers tripped? ―
 fAre the lamp indicators / or the temperature indicator  
lit or blinking? 162
 f
Is the lamp unit cover attached securely? 167
No image appears.
 f Are connections to external devices correctly performed? 49
 fIs the input selection setting correct? 67
 fIs the [BRIGHTNESS] adjustment setting at a minimum? 76
 fIs the external device that is connected to the projector working properly? ―
 fIs the shutter function in use? 66
 fIf the power indicator  is blinking in red, consult your dealer. ―
 fIs the lens cover still attached to the lens? 56
Image is fuzzy

.
 fIs the lens focus set correctly? 62
 fIs the projection distance appropriate? 32
 fIs the lens dirty? 21
 fIs the projector installed perpendicular to the screen? ―
Color is pale or grayish.
 f Are [COLOR] and [TINT] adjusted correctly? 77
 fIs the external device connected to the projector adjusted correctly? 49
 fIs the RGB cable damaged? ―
Remote control does not 
respond.
 f Are the batteries depleted? ―
 fIs the polarity of the batteries set correctly? 28
 fAre there any obstructions between the remote control and the remote control 
signal receiver of the projector? 24
 f
Is the remote control being used beyond its ef

fective operation range?24
 fAre other forms of light, such as fluorescent light, af

fecting the projection?24
 fIs the [REMOTE CONTROL] setting in [CONTROL

 DEVICE SETUP] set to 
[DISABLE]? 135
 f
Is the  terminal used for contact control? 184
 fIs the ID number setting operation correct? 69
Menu screen does not 
appear

.
 f Is the on-screen display function turned of

f (hidden)?104
Buttons on the control 
panel do not operate.
 f Is the [CONTROL

 PANEL] setting in [CONTROL DEVICE SETUP] set to 
[DISABLE]? 135
 f
Is the  terminal used for contact control? 184
Image does not display 
correctly

.
 f Is the [SYSTEM SELECT

OR] selection set correctly? 81
 fIs the [RGB1 INPUT

 SETTING] setting performed correctly? 98
 fIs there a problem with the video tape or other image sources? ―
 fIs a signal which is not compatible with the projector being input? 186
Image from a computer 
does not appear

.
 fIs the cable too long? (For D

- Sub cables, the cable length should be 10   m (32'10") 
or shorter.) ―
 f
Is the external video output on the laptop computer set correctly? (Ex.:  The external 
output settings may be switched by pressing the “Fn” + “F3” or “Fn” + “F10” 
simultaneously

. Since the method varies depending on the computer type, refer to 
the user manual provided with your computer.) ―
Image output from DVI
- D 
of the computer does not 
appear.
 f Is the [EDID SELECT] setting in [DVI-D IN] set to [EDID3] or [EDID2:PC]? 99
 fThe graphics accelerator driver of the computer may need to be updated t\
o the 
latest version. ―
 f
The condition may be improved by making the [EDID SELECT] setting in [DVI-D IN] 
and then restarting the computer

. 99
Video from HDMI 
compatible device does 
not appear or it appears 
jumbled.
 f Is the HDMI cable connected securely? 49
 fT

urn the power of the projector and the external device off and on. ―
 fIs a signal which is not compatible with the projector being input? 186
Lens shift cannot be 
adjusted
 f Perform [LENS CALIBRA

TION]. 125
 fIs the fixed-focus lens (Model No.: ET-

DLE055) attached?―  
						

							Chapter 5 Maintenance — Troubleshooting
170 - ENGLISH
ProblemsPoints to be checked Page
Cannot control the 
projector with Art-Net.
 f Are the connections between the twisted-pair-cable transmitter and the projector or 
an external device correctly done? ―
 f
Is [Art-Net SETUP] set to other than [OFF]? 141
 fAre the [NET], [SUB NET], [UNIVERSE], and [ST

ART ADDRESS] settings correct?141
The DIGITAL LINK input 
image is not displayed.
 f Are the connections between the twisted-pair-cable transmitter and the projector or 
an external device correctly done? ―
 f
Is [DIGIT

AL LINK MODE] set to [AUTO] or [DIGITAL LINK]? Is it set to 
[ETHERNET]? 138
 f
Is a signal which is not compatible with a twisted-pair-cable transmitter being input? ―
Attention
 fIf problems persist even after checking the preceding points, consult yo\
ur dealer .