PT-TW343RE - Panasonic Projector Service Manual (repair manual). Page 16

The basic service policy is shown below.

Repair contents

Applied parts

Block replacement 
P.C.Board replacement

 

- Lighting block (* Specified components are replaced)

 

- Optical Block

 

- P.C.Board

               (Specified components are replaced except A board and P board)
 

- Iris unit

Replaced by discrete components

Other electrical parts and mechanism parts

1.  Since very strong light is leakage from the surroundings of optical block, when checking or adjusting the 

projector with top cabinet removal, ware the UV protection glasses to protect the UV light. 

2. Before repairing, make sure to turn off the main power and disconnect the power plug from the power outlet.
  *  When replacing the print board, the internal electrical parts can be broken by the static electricity of clothes or 

human body. Please take care in static electricity, use an antistatic wrist strap or wear the anti-static electricity 
gloves.

3. After repairing, please check the gradation (10step or the gray scale) test pattern or moving image.
  Also, please check that it is normal on a self check screen.

The lamp cover switch detects whether the lamp cover is mounted securely.
When the lamp cover is mounted securely, the interlock switch (KW10) on the [A]-P.C.Board turns on.

Lamp cover switch