Panasonic PT-40LC12 Service Manual page 40

REPLACEMENT OF LAMP
Lamp Time Reset Procedure:
Be sure to reset the Lamp time to "0" after replacing the Lamp.
1. Plug in the AC Cord, and turn on the power by pressing the
POWER button.
2. Press and hold the VOLUME DOWN button on the unit and
the PIP key on the remote together for over 5 seconds in
power on condition.
When the reset is finished, the display as shown in Fig. 5-
1 appears and the LAMP LED goes out.
L A
R
Note:
1. If the Lamp time exceeds 5000 hours, when turning on
the power (Lamp ON), the display as shown in Fig.5-2
appears for about 5 minutes and LAMP LED flashes.
THE LAMP NEEDS TO BE
REPLACED, AND THE LAMP
HOUR METER NEEDS TO BE
RESET.
2. Due to variation in the way each lamp is used, the lamp
may need to be replaced before the maximum 5000
hour limit is reached. These variations include the
number of times and the duration the lamp is lit, prolonged
use in excess of 24 hours, and any mechanical shock
the bulb may accidentally experience. In situations
where the use of this product is critical we recommend
keeping a spare bulb on hand.
WARNING:
The high-pressure lamp may explode if not properly handled.
The lamp is hot immediately after use. Touching it directly may
cause burns. Please allow the lamp to cool before handling or
replacing the lamp unit.
Avoid touching the glass portion of the bulb with your fingers.
Natural oils from your skin can cause a "hot spot" to develop,
which can cause the bulb to crack when it gets hot. In case the
bulb is accidentally touched, the area should be carefully
cleaned using isopropyl alcohol and a soft lint free cloth or
cotton ball.
Cautions for Lamp Unit Replacement:
• Handle the removed old lamp unit carefully. If handled
improperly, it may explode.
• Wear gloves when replacing the lamp unit.
• If replacing the lamp unit becomes necessary during the
operation of the TV, follow the procedure below to turn off
the power and wait until the lamp unit cools completely.
M P I T M E W A S
E S E T T O . 0
RECALL RECALL
E X I T E X I T
Fig. 5-1
RECALL
EXIT
Fig. 5-2
Lamp Replacement Procedure:
1. Press the POWER button on the remote to turn off the
power.
2. Wait for about 1 minute until the cooling fan stops.
Note:
The lamp cooling fan will continue to operate for about 1
minute after the power is turned off. Do not unplug the AC
Cord from the outlet until the fan has stopped. Avoid
interrupting the power by using circuit breakers or switchable
power strips.
3. After the cooling fan has stopped, unplug the AC Cord from
the outlet.
Note:
Please wait more than one hour before replacing the lamp.
[ Forced cooling function ]
If you need to replace the lamp more urgently:
• The Projection display has a forced cooling feature.
After the POWER button is turned OFF, and
sometime during about the first minute of the normal
cooling fan operation, press the VOLUME UP button
on the unit and CH UP key on the remote at the same
time for more than 5 seconds. The cooling fan will
operate for about 10 minutes.
4. Remove the Front Cover L Unit from the latches.
5. Remove the Lamp Cover by loosening the 2 Screws.
Screw
6. Loosen the 2 Screws on the Lamp. Then, pull the Lamp.
Note:
Because the Lamp may still be hot, use caution when
handling.
Screw
7. Install the new Lamp, and tighten the 2 Screws.
8. Install the Lamp Cover securely, and tighten the 2 Screws.
9. Install the Front Cover L Unit.
Note:
After replacing the Lamp, use caution to reset the Lamp time.
Lamp Cover
Screw
Fig. 5-3
Lamp
Screw
Fig. 5-4