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Service Manual

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  • Contains Circuit Diagrams
  • Download
  • PDF Format
  • Complete manual
  • Language: English
Price: $4.99

Description of PANASONIC PT40LC12 Service Manual

Complete service manual in digital format (PDF File). Service manuals usually contains circuit diagrams, printed circuit boards, repair tips, wiring diagrams, block diagrams and parts list. Service Manual ( sometimes called Repair Manual ) is used mainly by technicians.

If You just want to know how to use Your tv, video, mp3 player etc. You should look for Owner's Manual. After placing order we'll send You download instructions on Your email address.

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Text excerpt from page 40 (click to view)
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. 51 appears and the LAMP LED goes out.

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.




Fig. 5-1 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.


Lamp Cover Screw Screw



Fig. 5-2 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. Fig. 5-3 6. Loosen the 2 Screws on the Lamp. Then, pull the Lamp. Note: Because the Lamp may still be hot, use caution when handling.

Lamp Screw Screw

Fig. 5-4 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.

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