Hitachi Projector CP-HD9950 User Manual

101
Security
ItemDescription
SECURITY INDICATOR
Selecting this item displays the SECURITY INDICATOR dialog. Use 
the ▲/▼ buttons to select ON or OFF.
ON  OFF
When ON is selected while PIN LOCK is ON, the SECURITY 
indicator blinks in yellow in the standby mode (98,114).
STACK LOCKSelecting this item displays the STACK LOCK dialog. For more information, see the Instant Stack Guide. 

102
Maintenance 
Maintenance
Replacing the lamp
A lamp has finite product life. Using the lamp for long periods of time could cause 
the pictures darker or the color tone poor. Each lamp has a different lifetime, and 
some may burst or burn out soon after you start using them. 
New lamp preparation and early replacement are recommended. To prepare a 
new lamp,  contact your dealer and indicate the lamp type number.
 
Type number :  DT01911
1. Turn the projector off, and unplug the power cord. Allow the...

103
►Do not touch the interior of the projector, while the lamp is 
removed.
CAUTION
5. Insert the new lamp, and retighten the three screws of the lamp loosened in 
the previous step to lock it in place.
6. While putting the interlocking parts of the lamp cover and the projector 
together, slide the lamp cover back in place. Then firmly fasten the screw of 
the lamp cover.
7. Turn the projector on and reset the lamp time using the LAMP TIME item in 
the OPTION menu. 
(1)  Press the MENU button to display...

104
Maintenance
Lamp warning
 HIGH VOLTAGE  HIGH TEMPERATURE HIGH PRESSURE
►The projector uses a high-pressure mercury glass lamp. The lamp 
can break with a loud bang, or burn out, if jolted or scratched, handled while hot, or 
worn over time. Note that each lamp has a different lifetime, and some may burst or 
burn out soon after you start using them. In addition, if the bulb bursts, shards of glass 
can fly into the lamp housing, and gas containing mercury and dust containing fine 
particles of glass...

105
Maintenance
5.  Use a vacuum cleaner to clean on both 
sides of the fine meshed filter while 
holding it so it will not be sucked in. Use a 
vacuum cleaner to clean the inside of the 
filter cover to clean up the coarse meshed 
filter. If the filters are damaged or heavily 
soiled, replace them with new ones.
Cleaning and replacing the air filter
Plastic band
4, 5Filter (coarse meshed)Filter (fine meshed)
Check and clean the air filter periodically. When the indicators or a message 
prompts you to...

106
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...

107
Replacing the internal clock batter y
Consumption of the battery makes the clock not to work correctly. When the clock is 
inaccurate or stopped, replace the battery according to the following procedures.
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 
up. 
3.  
Turn the battery cover fully in the direction indicated “OPEN”...

108
Maintenance
Other care
To ensure the safe use of your projector, have it cleaned and inspected by your 
dealer 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. Take care of...

109
Indicator StatusDescription
The projector is in a standby state.
Refer to the section “Power on/off”.
The projector is warming up.
Wait for the projector to warm up..
The projector is in an on state.
Ordinary operations may be performed.
The projector is cooling down.
Wait for the projector to cool down.
The indicators may differ from this manual, check and deal with it according to the 
following table.
The indicators are described as below.
Lit
Steady lightBlinkingOff
Regarding the indicator lamps...

11 0
Regarding the indicator lamps
Indicator StatusDescription
The projector is cooling down. A certain error 
has been detected.
Wait until POWER indicator finishes blinking, and then perform the proper measure using the item descriptions below.
The lamp cover has not been properly fixed. 
Turn the power off, and allow the projector to cool down at least 20 minutes. After the projector has sufficiently cooled down, confirm the attachment state of the lamp cover. After performing any needed maintenance,...