Sony DSR-1800 Service Manual page 269

Replacement
1. Removing the TG1 arm assembly
Remove the TG1 arm assembly.
(Refer to Section 7-13.)
2. Removing the loading motor assembly
Remove the loading motor assembly.
(Refer to Section 7-17.)
3. Removing the SE-521 board
(1) Disconnect the flexible card wire from the
connector (CN3) on the SE-521 board.
(2) Disconnect the flexible card wire from the
connector (CN4) on the SE-521 board.
(3) Remove the screw and remove the SE-521
board.
n
Use care about the claw of the worm holder.
4. Replacing the S tension regulator
assembly
(1) Remove the S tension regulator assembly by
removing the two screws.
(2) Turn the manual eject cover clockwise until
No.3 gear comes to the position shown in the
figure.
(3) Engage a gear on a new S tension regulator
assembly with No.3 gear as shown in the
figure, and align the notch of the S tension
regulator with the positioning pin on the
chassis, then attach the new assembly to the
chassis with the screw (a).
(4) Turn the manual eject cover counterclock-
wise to bring to the unthreading end position.
(5) Reattach the S tension regulator assembly to
the MD chassis with the screw (b).
Tightening Torque : 0.1 N.m {1 kgf.cm}
(6) Turn the manual eject cover clockwise to
enter the threading condition. At this opera-
tion, check the two points below.
The spring of the S tension regulator assem-
bly shown in the figure do not contact the
post of No.3 gear.
The column pushes the spring under
unthreading end status.
Unless satisfy these conditions, perform the
step (2) and after.
(7) Turn the manual eject cover counterclock-
wise to bring to the unthreading end position.
DSR-1800/P/1600/P
P1.4 x 3.5
Connector
(CN4)
Connector
(CN3)
Claw of warm holder
Flexible card
wire
Flexible
card
wire
No.3 gear
Tension regulator
assembly
S tension regulator
assembly
7-11. S Tension Regulator Assembly Replacement
SE-521 board
(b) P1.4 x 3.5
(a)
P1.4 x 3.5
Notch
Spring
Manual eject
cover
Positioning pin Post of No.3 gear
7-35