Panasonic PT-40LC12 Service Manual page 124

REMOVAL OF THE PROJECTION UNIT
Projection Unit includes the Optical Block, the LCD Main
C.B.A., though does not include the Lamp.
CAUTION:
1. Be sure to make a note of the LAMP RUN TIME
(value A) in Service Mode (LCD Main C.B.A. (1)):
LAMP TIME is stored in EEPROM on the LCD Main C.B.A.
Therefore, before removing the Projection Unit at the user's
location, make a note of the LAMP RUN TIME (value A) in
Service Mode.
Then, after installing the new Projection Unit (without the
Lamp) at the user's location, be sure to install the original
Lamp and set the LAMP RUN TIME to the original value
(value A) in Service Mode.
Otherwise, OSD and LED indication to request for Lamp
replacement will be displayed at the wrong time.
Note:
In case it is impossible to make a note of the LAMP RUN
TIME because of a defective LCD Main C.B.A., ask the
customer their daily average use and the approximate age
of the current Lamp. Then, calculate the LAMP RUN TIME
and make a note. Refer to "BEFORE REMOVING THE
PROJECTION UNIT FROM THE UNIT AT THE USER'S
LOCATION" in SERVICE NOTES.
2. Be sure to make a note of the FILTER TIME (value B)
in Service Mode (LCD Main C.B.A. (1)):
FILTER TIME is stored in EEPROM on the LCD Main
C.B.A. Therefore, before removing the Projection Unit at
the user's location, make a note of the FILTER TIME (value
B) in Service Mode.
Then, after installing the new Projection Unit at the user's
location, be sure to set the FILTER TIME to the original
value (value B) in Service Mode.
Otherwise, OSD and LED indication to request for Air Filter
cleaning will be displayed at the wrong time.
1. Make a note of the LAMP RUN TIME (value A) and the
FILTER TIME (value B) in Service Mode.
2. Remove the Rear Cover, the AV Front Door, the Front
Cover L Unit, the Front Cover R Unit, the Center Panel Unit,
the Lamp Cover and the Base Front Panel Unit. Refer to
Steps 1~7 in "HOW TO REMOVE THE TV MAIN C.B.A.
AND THE REAR JACK C.B.A."
After removing the Base Front Panel Unit
<Front View>
Fig. D2-1
3. 1) Remove the Front Bar by removing 2 Screws.
2) Disconnect Connector P1005 (or P1007), P1010 on the
TV Main C.B.A. Remove the 2 Screws on the 3 GND
Wires.
GND Wire
Screw "a"
P1005 (or P1007)
(GND Wire 1pin)
GND Wire
Screw "a"
4. Disconnect Connectors P2501, P2701, P2305 on the LCD
Main C.B.A. and release them from the clampers.
P2701
P2305
Clamper
5. Remove the Duct Fan Unit by removing the 4 Screws and
releasing the 2 Hooking Portions.
Duct Fan Unit
Screw "a"
Screw "a"
Front Bar
Screw "a"
P1010
GND Wire
(GND Wire 1pin)
Fig. D2-2
P2501
Clamper
LCD Main C.B.A.
Fig. D2-3
Screw "a"
Hooking
Portion
Screw "a"
Fig. D2-4
Screw "a"
P3006