1

Shutdown the system.

2

Remove the knurled screw on the top.

3

Slide the FPD top cover borad then remove it.

4

Slowly pull the photomultiplier unit out horizontally to remove it.

Cover the photomultiplier receiver with aluminum foil etc. to avoid exposure to intense light.

5

Remove the 2 screws and remove the head section.

6

Remove the two body section setscrews.

7

Pull the body section out upwards.

8

Unscrew the cooling duct setscrew and remove the duct by pulling it apart.

9

Loosen the mirror fixed nut and remove.

10

Pull to detach the mirror section, if it is dirty, wipe away any dirt on the filter surface using a soft cloth.

Also replace the O-ring of the lens unit if it has deteriorated.

O-ring for lenz : 036-11022

11

Set O-rings both on the mirror section and the FPD body, then attach the mirror. Make sure the projection on the lenz fits the ditch on the body, then insert it.

12

Tighten the mirror fixed nut with your hand.

13

Fit the duct from the front and back of the cooling fin and fix in place using the setscrew.

14

Insert the body section into the nozzle base and fix in place using the 2 screws.

15

Attach the head section and fix in place using the 2 screws.

16

Put back the photomultiplier unit slowly.

17

Put back the top cover board and slide it to adjust the screw position.

18

Tighten the knurled screw with pulling the board to the left so that it settles the photomultiplier unit.

19

Start up the system.