PT-TW351R (serv.man6) - Panasonic Projector Service Manual (repair manual). Page 44

DIS-12

L-

G-Optical block

Optical block

   Optical block and polarized glasses are 

very sensitive parts.

   Use air blower to clear the dust on the 

surface of the Optical block 

  

(For more details about handling the inorganic 
polarized glass, please read the next page). 

The Optical block used for this model cannot be 

replaced separately. Do not disassemble the Optical 

block. These Optical block are installed with precision at 

the factory. When replacing the Optical block, should be 

replaced whole of the Optical block  at once. 

After  replacing  Optical  block,  take  the  optical  and 

electrical  adjustments  following  to  the  chapter 

"Adjustment". 

1.  Remove 2 screws A (M3x8) and pull out the lens/Optical block. 

2. Remove 4 screws B (M2.5x8), remove the Optical block.

There are 2 types of optical block, named R-type and L-type. 

When replacing the optical block, check the printed marker on the flat cable of the G-LCD panel and 

use the same type of the optical block. If not used the same type, you will find the color shading or 

wrong white balance picture on the screen.  

Please check the print serial number on the G-Optical block 's cable. 

  GR --> R-Optical block

  GL --> L-Optical block

G-LCD panel

B-LCD panel

Polarized glass OUT(B)

Polarized glass OUT(G)

Polarized glass OUT(R)

R-LCD panel

B

B

B

B

A

A

* Before taking the procedure, remove cabinet top and main board following to the "Mechanical Disassembly". 
* Disassembly tools: 2.0mm hex wrench and screwdriver.