Sony DVCAM DSR-250 Service Manual page 33

2-3-19. MD-76 BOARD AND ENCODER RETAINER
Disassembly: Remove them in order of 1,2,3,4,5,6,7,8,9
Screw
6
MD-76 board
9
Screw
7
2
FP-104
flexible board
(Six parts
are soldered.)
Screw
8
Positioning pin
Assembly: Attach them in order of 9,8,3,4,5,6,7,1,2
(Refer to the figure above or below.)
Fit this claw
Screw
4
in the hole of
and fasten the screws.
Positioning pin
MD-76 board
Screw
5
Solder the FP-104 flexible board
(six parts).
Temperature of tip of soldering iron: 350 ± 20 ° C
Hold time: one second or shorter
3 Screw
Screw
5
Encoder cover
(A positioning
4
claw is hooked.)
Encoder disk
(Positioning is
required.)
tape A
1 Encoder disk
(Positioning is required.)
Positioning pin
Encoder cover
Screw
3
Screw
2
5-49
Disassembly of MD-76 board
Peel off the FP-248 flexible board at the front of the chassis
(refer to page 5-43). Remove the six solders on the FP-
104 flexible board from the rear of the chassis. Remove
the screws in order of 3 to 8 shown in the figure. When
removing the MD-76 board from the chassis, be careful
not to let the sensors touch the chassis.
Note: When the tape A is removed, use the new tape A for
replacement. (See the illustration below.)
FP-248 flexible board
Peel off the flexible board while being careful not to get
the sensor block dirty or damage the sensor block.
Assembly of MD-76 board
While being careful not to let the sensors touch the chassis,
position the two positioning pins and fasten the screws in
order of 1 to 5. Then, solder the six parts on the removed
FP-104 flexible board and position the encoder disk.
Finally, stick the FP-248 flexible board on the front of the
chassis. (Refer to page 5-43.)
Screw
1
(This screw fixes the encoder cover.)
Positioning the encoder disk
Align the mark of the disk with the v mark
printed on the board as shown in the figure.
(Be careful of the position of a .)
Positioning pin
Tape A
(Adhere a half of the tape in the peripheral of
the switches S2 and S3 on the MD-76 board
and adhere the remaining half on the mechanism
chassis.)
Tightening torque of MD-76 board
0.3432 ± 0.0196 N·m (3.5 ± 0.2 kg • cm)
Sensor block