Hitachi Cp-X4021n Projector Users Manual

							91
Maintenance
Cleaning and replacing the air filter
Please check and clean the air filter periodically. When the indicators or a 
message prompts you to clean the air filter, comply with it as soon as possible.
The air filter of this projector consists of a filter cover and a filter unit with two 
types of filter. If one or both of the filters are damaged or heavily soiled, replace 
the filter unit with a new one.
Request for a filter unit with the following type number from your dealer when 
purchasing a new unit.
Type number : MU06641 (Filter unit)
The specified filter unit also comes with a 
replacement lamp for this projector. Please replace 
the filter unit as well when you replace the lamp.
Filter cover
Filter cover 
knobs
Filter unit
Filter unit 
knobs
Interlocking 
parts
1. Turn the projector off, and unplug the power 
cord. Allow the projector to sufficiently cool 
down.
2. Use a vacuum cleaner on and around the 
filter cover.
3. Pick and pull up the filter cover knobs to 
take it off.
4.  Press up slightly the bottom side knobs to 
unlock the bottom side of the filter unit. Pull 
the center knob to take the filter unit off.
5. Use a vacuum cleaner for the filter vent of 
the projector and the outer side of the filter 
unit.
6.  The filter unit consists of two parts. Press 
down around the interlocking parts to 
unlock, then separate the two parts.
7. Use a vacuum cleaner for the inner side of 
each part of the filter unit to clean them up. 
If the filters are damaged or heavily soiled, 
replace them with the new ones.
8. Combine the two parts to reassemble the 
filter unit.
9. Put the filter unit back into the projector.
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							92
Maintenance
► Before taking care of the air filter, make sure the power cable 
is not plugged in, then allow the projector to cool sufficiently.
►Use only the air filter of the specified type. Do not use the projector without the 
air filter or the filter cover. It could result in a fire or malfunction to the projector.
►Clean the air filter periodically. If the air filter becomes clogged by dust or the 
like, internal temperatures rise and could cause a fire, a burn or malfunction to 
the projector.WARNING
• Please reset the filter time only when you have cleaned or replaced 
the air filter, for a suitable indication about the air filter.
• The projector may display the message such as the “CHECK THE AIR 
FLOW” or turn off the projector, to prevent the internal heat level rising. NOTE Cleaning and replacing the air filter (continued)
10. Put the filter cover back into the place.
11 . Turn the projector on and reset the filter time using the FILTER TIME item in 
the EASY MENU.
(1)  Press the MENU button to display a menu.
(2)  Point at the FILTER TIME using the ▲/▼ cursor buttons, then press the 
► cursor (or the ENTER / the RESET) button. A dialog will appear.
(3)  Press the ► cursor button to select the “OK” on the dialog. It performs 
resetting the filter time. 
						

							93
Maintenance
Replacing the internal clock batter y
This projector has internal clock that uses a battery. When 
the clock of the network function does not work correctly, 
please try solution by replacement of the battery: HITACHI 
MAXELL, part number CR2032 or CR2032H.OPEN
CLOSE
OPEN
CLOSE
OPEN
CLOSEOSELOSE
OPEN
CLOSE
Raised dot
Battery Knob
Battery     
Cover
1. 
Turn the projector off, and unplug the power cord. Allow 
the projector to cool sufficiently.
2. 
After making sure that the projector has cooled 
adequately, slowly turn over the projector, so that the 
bottom is facing.
3. 
There is a raised dot near the battery cover at the 
bottom of the projector. Turn the cover in the direction 
indicated OPEN to position one end of the slit on the 
cover with the dot, using a coin or the like. And then 
pick the cover up to remove it. 
 
4. 
Pry up the battery using a flathead screwdriver or the 
like to take it out. While prying it up, put a finger lightly 
on the battery since it may pop out of the holder.
5. 
Replace with a new battery of the specified type. With 
the plus side facing up, slide the battery under the claw 
of the spring fitting. And press down on the battery until 
it snaps into place.
6. 
Replace the battery cover in place, then turn it in the 
direction indicated CLOSE to position the knob of the 
cover with the dot on the bottom case to fix the cover, 
using a coin or the like.
NOTE
  • The internal clock will be initialized by removing the battery. For 
setting the clock, see the User’s Manual - Network Guide.
►Be careful of handling a battery, as a battery can cause explosion, 
cracking or leakage, which could result in a fire, an injury, and environment pollution.
•  Use only the specified and perfect battery. Do not use a battery with damage, 
such as a scratch, a dent, rust or leakage.
•  When replacing the battery, replace it with a new battery.
•  
When a battery leaked, wipe the leakage out well with a waste cloth. If the leakage 
adhered to your body, immediately rinse it well with water. When a battery leaked in 
the battery holder, replace the batteries after wiping the leakage out.
•  Make sure the plus and minus terminals are correctly aligned when loading a battery.
•  Do not work on a battery; for example recharging or soldering.
•  
Keep a battery in a dark, cool and dry place. Never expose a battery to a fire or water.
•  Keep a battery away from children and pets. Be careful for them not to swallow a 
battery. If swallowed consult a physician immediately for emergency treatment.
•  Obey the local laws on disposing a battery.WARNING 
						

							94
Maintenance
Other care
In order to ensure the safe use of your projector, please have it cleaned and 
inspected by your dealer about once every year.
1.Turn the projector off, and unplug the power cord. Allow the projector to cool 
sufficiently.
2.After making sure that the projector is cool adequately, lightly wipe the lens 
with a commercially available lens-cleaning wipe. Do not touch the lens 
directly with your hand. If the lens is flawed, soiled or fogged, it could cause deterioration of display 
quality. Please take care of the lens, being cautious of handling.
►Before caring, make sure the power cord is not plugged in, 
and then allow the projector to cool sufficiently. The care in a high temperature 
state of the projector could cause a burn and/or malfunction to the projector.
►Never try to care for the inside of the projector personally. Doing is so 
dangerous. 
►Avoid wetting the projector or inserting liquids in the projector. It could result in 
a fire, an electric shock, and/or malfunction to the projector. 
•  Do not put anything containing water, cleaners or chemicals near the projector. 
•  Do not use aerosols or sprays.WARNING
►Please take right care of the projector according to the 
following. Incorrect care could cause not only an injury but adverse influence 
such as discoloration, peeling paint, etc. 
►Do not use cleaners or chemicals other than those specified in this manual. 
►Do not polish or wipe with hard objects.
NOTICE ►Do not directly touch the lens surface with hands. CAUTION
Inside of the projector
Caring for the lens
1.Turn the projector off, and unplug the power cord. Allow the projector to cool 
sufficiently.
2.After making sure that the projector is cool adequately, lightly wipe with gauze 
or a soft cloth. 
If the projector is extremely dirty, dip soft cloth in water or a neutral cleaner 
diluted in water, and wipe lightly after wringing well. Then, wipe lightly with a 
soft, dry cloth. Incorrect care could have adverse influence such as discoloration, peeling paint, 
etc. Caring for the cabinet and remote control 
						

							95
Troubleshooting
Troubleshooting
If an abnormal operation should occur, stop using the projector immediately.
Otherwise if a problem occurs with the projector, the following checks and measures are 
recommended before requesting repair. 
If this does not resolve the problem, please contact your dealer or service company. They 
will tell you what warranty condition is applied.
►Never use the projector if abnormal operations such as smoke, 
strange odor, excessive sound, damaged casing or elements or cables, penetration 
of liquids or foreign matter, etc. should occur. In such cases, immediately disconnect 
the power plug from the power outlet. After making sure that the smoke or odor has 
stopped, contact to your dealer or service company.WARNING
Related messages
When some message appears, check and cope with it according to the following table. 
Although these messages will be automatically disappeared around several minutes, it will 
be reappeared every time the power is turned on.
Message Description
There is no input signal. 
Please confirm the signal input connection, and the status 
of the signal source.
The USB TYPE B port is selected as the picture input 
source even if MOUSE is selected for USB TYPE B
 (55).
Select USB DISPLAY in the dialog to project the picture 
input to the USB TYPE B port. In this case, you cannot use 
the simple mouse and keyboard function. Otherwise select 
other port for picture input.
Projector is waiting for an image file.
Check the hardware connection, settings on the projector 
and network-related settings.
The computer-Projector network connection might be 
disconnected. Please re-connect using “Connect button” of 
the “LiveViewer”. 
(Using the “LiveViewer” in the User's 
Manual - Network Guide)
The horizontal or vertical frequency of the input signal is 
not within the specified range.
Please confirm the specs for your projector or the signal 
source specs.
An improper signal is input. 
Please confirm the specs for your projector or the signal 
source specs.
Troubleshooting
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							96
Message Description
The internal temperature is rising. 
Please turn the power off, and allow the projector to cool 
down at least 20 minutes. After having confirmed the 
following items, please turn the power ON again. 
 • Is there blockage of the air passage aperture? 
 • Is the air filter dirty? 
 • Does the peripheral temperature exceed 35°C?
If the same indication is displayed after the remedy, please 
set FAN SPEED of the SERVICE item in the OPTION menu 
to HIGH.
A note of precaution when cleaning the air filter. 
Please immediately turn the power off, and clean or change 
the air filter referring to the Cleaning and replacing the 
air filter section of this manual. After you have cleaned or 
changed the air filter, please be sure to reset the filter timer 
(
56,91).
The button operation is not available.
Troubleshooting
Related messages (continued) 
						

							97
Troubleshooting
Regarding the indicator lamps
When operation of the LAMP, TEMP and POWER indicators differs from usual, 
check and cope with it according to the following table.
For the SECURITY indicator, see SECURITY INDICATOR in the SECURITY menu.
POWER 
indicatorLAMP 
indicatorTEMP 
indicatorDescription
Lighting
In 
Orange
Turned
offTurned
offThe projector is in a standby state.
Please refer to the section “Power on/off”.
Blinking
In 
Green
Turned
offTurned
offThe projector is warming up.
Please wait.
Lighting
In 
Green
Turned
offTurned
offThe projector is in an on state.
Ordinary operations may be performed.
Blinking
In 
Orange
Turned
offTurned
offThe projector is cooling down.
Please wait.
Blinking
In 
Red
(discre-
tionary)(discre-
tionary)
The projector is cooling down. A certain error 
has been detected.
Please wait until POWER indicator finishes blinking, 
and then perform the proper measure using the item 
descriptions below.
Blinking
In 
Red
or
Lighting
In 
Red
Lighting
In 
Red
Turned
off
The lamp does not light, and there is a possibility 
that interior portion has become heated.
Please turn the power off, and allow the projector to 
cool down at least 20 minutes. After the projector has 
sufficiently cooled down, please make confirmation of 
the following items, and then turn the power on again.
• Is there blockage of the air passage aperture?
• Is the air filter dirty?
• Does the peripheral temperature exceed 35°C?
If the same indication is displayed after the remedy, 
please change the lamp referring to the section 
Replacing the lamp.
Blinking
In 
Red
or
Lighting
In 
Red
Blinking
In 
Red
Turned
off
The lamp cover has not been properly fixed. 
Please turn the power off, and allow the projector to 
cool down at least 45 minutes. After the projector has 
sufficiently cooled down, please make confirmation of 
the attachment state of the lamp cover. After performing 
any needed maintenance, turn the power on again. 
If the same indication is displayed after the remedy, 
please contact your dealer or service company.
Blinking
In 
Red
or
Lighting
In 
Red
Turned
offBlinking
In 
Red
The cooling fan is not operating.
Please turn the power off, and allow the projector to 
cool down at least 20 minutes. After the projector has 
sufficiently cooled down, please make confirmation 
that no foreign matter has become caught in the fan, 
etc., and then turn the power on again.
If the same indication is displayed after the remedy, 
please contact your dealer or service company.
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							98
Troubleshooting
Regarding the indicator lamps (continued)
• When the interior portion has become overheated, for safety purposes, 
the projector is automatically shut down, and the indicator lamps may also be 
turned off. In such a case, disconnect the power cord, and wait at least 45 minutes. 
After the projector has sufficiently cooled down, please make confirmation of the 
attachment state of the lamp and lamp cover, and then turn the power on again.NOTE
POWER 
indicatorLAMP 
indicatorTEMP 
indicatorDescription
Blinking
In 
Red
or
Lighting
In 
Red
Turned
offLighting
In 
Red
There is a possibility that the interior portion 
has become heated.
Please turn the power off, and allow the projector to cool down at least 
20 minutes. After the projector has sufficiently cooled down, please make 
confirmation of the following items, and then turn the power on again.
• Is there blockage of the air passage aperture?
• Is the air filter dirty?
• Does the peripheral temperature exceed 35°C?
If the same indication is displayed after the remedy, please set FAN 
SPEED of SERVICE item in OPTION menu to HIGH 
(59).
Lighting
In 
Green
Simultaneous
blinking in 
Red
It is time to clean the air filter.
Please immediately turn the power off, and clean or 
change the air filter referring to the section Cleaning 
and replacing the air filter. After cleaning or changing 
the air filter, please be sure to reset the filter timer. 
After the remedy, reset the power to ON.
Lighting
In 
Green
Alternative
blinking in 
Red
There is a possibility that the interior portion 
has become overcooled.
Please use the unit within the usage temperature 
parameters (5°C to 35°C).  
After the treatment, reset the power to ON.
Blinking In 
Green for 
approx. 3 
seconds.Turned
offTurned
offAt least 1 Power ON schedule is saved to the 
projector.
Please refer to Schedule Settings section of User’s 
Manual - Network Guide.
Shutting the projector down
Only when the projector can not be turned off by usual 
procedure (
18), please push the shutdown switch using 
a pin or similar, and disconnect the power plug from the 
power outlet. Before turning it on again, wait at least 10 
minutes to make the projector cool down enough.
Resetting all settings
When it is hard to correct some wrong settings, the FACTORY RESET function of 
SERVICE item in OPTION menu (
63) can reset all settings (except settings such 
as LANGUAGE, LAMP TIME, FILTER TIME, FILTER MESSAGE, SECURITY and 
NETWORK) to the factory default.
Shutdown switch 
						

							99
Troubleshooting
Phenomena that may be easy to be mistaken for machine defects
About the phenomenon confused with a machine defect, check and cope with it 
according to the following table.
Phenomenon Cases not involving a machine defectReference 
page
Power does not 
come on.
The electrical power cord is not plugged in.
Correctly connect the power cord.15
The main power source has been interrupted during 
operation such as by a power outage (blackout), etc.
Please disconnect the power plug from the power outlet, 
and allow the projector to cool down at least 10 minutes, 
then turn the power on again.
15
Either there is no lamp and/or lamp cover, or either 
of these has not been properly fixed.
Please turn the power off and disconnect the power 
plug from the power outlet, and allow the projector to 
cool down at least 45 minutes. After the projector has 
sufficiently cooled down, please make confirmation of 
the attachment state of the lamp and lamp cover, and 
then turn the power on again.
89
Neither sounds
nor pictures are
outputted.
The signal cables are not correctly connected.
Correctly connect the connection cables.10 ~ 14
Signal source does not correctly work.
Correctly set up the signal source device by referring to 
the manual of the source device.
–
The input changeover settings are mismatched.
Select the input signal, and correct the settings.19 ~ 21
The BLANK function for pictures and the MUTE 
function for sounds are working.
AV MUTE may be active. 
Refer to the item “Sound does not come out” and “No 
pictures are displayed” on the next page to turn off the 
MUTE and BLANK functions.
19, 28, 
100
(Continued on next page) 
						

							100
Troubleshooting
Phenomena that may be easy to be mistaken for machine defects (continued)
Phenomenon Cases not involving a machine defectReference 
page
Sound does not 
come out.The signal cables are not correctly connected.
Correctly connect the audio cables.10 ~ 14
The MUTE function is working.
Restore the sound pressing MUTE or VOLUME +/- button 
on the remote control.19
The volume is adjusted to an extremely low level.
Adjust the volume to a higher level using the menu function 
or the remote control.19, 46, 
47
The AUDIO SOURCE/SPEAKER setting is not correct.
Correctly set the AUDIO SOURCE/SPEAKER in AUDIO menu.46
The mode selected for HDMI AUDIO is not suitable. 
Check each of the two modes provided and select the 
suitable one for your HDMI audio device.
47
No pictures are 
displayed.The lens cover is attached.
Remove the lens cover.4, 18
The signal cables are not correctly connected.
Correctly connect the connection cables.10 ~ 14
The brightness is adjusted to an extremely low level.
Adjust BRIGHTNESS to a higher level using the menu function.33
The computer cannot detect the projector as a plug and play monitor.
Make sure that the computer can detect a plug and play 
monitor using another plug and play monitor.10
The BLANK screen is displayed.
Press BLANK button on the remote control.28
The USB TYPE B port is selected as the picture input 
source even if MOUSE is selected for USB TYPE B. 
Select USB DISPLAY for USB TYPE B in OPTION menu to 
project the picture input to the port. Otherwise select other 
port for picture input.
55
The projector does not recognize the USB storage 
device inserted into USB TYPE A port. 
Use the REMOVE USB function first, remove the USB 
storage device, and then insert it into the port again. 
Before removing the USB storage device, be sure to use 
the REMOVE USB function on the thumbnail screen, which 
appears when the USB TYPE A port is selected as the input 
source.
12, 80
(continued on next page)