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 2 ignitor setscrews and remove the ignitor holder.

7

Slowly pull the ignitor filament out of the head section.

8

The filament needs to be replaced if it has either deteriorated, or the wire has broken.

Ignitor filament : 221-73430-82

9

Insert the ignitor filament into the head section.

10

Attach the ignitor holder and fix in place using the 2 screws.

11

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

12

Put back the photomultiplier unit slowly.

13

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

14

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

15

Start up the system.

Note:
The cover board (P/N : 221-71795-91) has been modified since Apr. 2006 product (the previous model was in the shape of a flat borad).