Sony DSR-250, Руководство по обслуживанию

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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.
2-3-19. MD-76 BOARD AND ENCODER RETAINER
Disassembly: Remove them in order of
1
,
2
,
3
,
4
,
5
,
6
,
7
,
8
,
9
Assembly: Attach them in order of
9
,
8
,
3
,
4
,
5
,
6
,
7
,
1
,
2
(Refer to the figure above or below.)
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.)
FP-248 flexible board
3
6
8
1
2
7
9
4
5
Screw
Positioning pin
tape A
FP-104
flexible board
(Six parts
are soldered.)
Screw
Screw
Positioning pin
Screw
Encoder cover
(A positioning
claw is hooked.)
Encoder disk
(Positioning is
required.)
Encoder disk
(Positioning is required.)
Screw
MD-76 board
Sensor block
Peel off the flexible board while being careful not to get
the sensor block dirty or damage the sensor block.
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.)
Solder the FP-104 flexible board
(six parts).
Temperature of tip of soldering iron: 350
±
20
°
C
Hold time: one second or shorter
Positioning pin
Screw
1
(This screw fixes the encoder cover.)
Encoder cover
Screw
3
Screw
2
Screw
5
Screw
4
Positioning pin
Tightening torque of MD-76 board
0.3432
±
0.0196 N·m (3.5
±
0.2 kg • cm)
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
.)
Fit this claw
in the hole of
and fasten the screws.
MD-76 board
Note: When the tape A is removed, use the new tape A for
replacement. (See the illustration below.)