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D-2. TUBE REMOVAL
- loosen four objective adjustment screws (Figure D-1, 6).
- Unscrew the lock ring (Figure D-1, 2).
- remove the objective lens (Figure D-1, 1).
- Unscrew the lock ring (Figure D-1, 7).
- Draw out the orienting sleeve (Figure D-1, 9).
- Take off defective image intensifier tube.
- Unsolder flexible circuit of the variable gain tube from the
board on the tube end. Accurately separate the board from the
tube for second using.
- Draw the adjusting shims (Figure D-2, 15) out the sight (con-
stant gain tube).
D-3. TUBE INSTALLATION
A. Va r i a b l e G a i n Tu b e M x-117 6 9 ( F 9 8 15 S e r i e s )
Preparation
- Glue the board (Figure D-3, 1) onto the rear end surface of the
variable gain tube.
- Cut the flexible circuit of the tube according the Figure D-3.
- very accurately remove protective lacquer from the flexible cir-
cuit.
- Tinning the traces of the flexible circuit.
- Bend the flexible circuit onto the board and solder it.
B. C o n s t a n t G a i n Tu b e M x-1016 0 ( F 9 8 0 0 S e ri e s )
Preparation
- Measure the tube length
- Determine the quantity of the adjusting shims from the
Table D-2 (shim thickness is 0.5 mm).
D-3
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