SONY CCDTRV408E
Service Manual

4-3. Drum Base Assembly, Drum Earth
1. Removal procedure
1) Remove the capstan flexible board and flexible wiring board (FP-300) from the holders X, Y and Z in the direction of the arrow. Remove the drum assembly. (Refer to section 4-1.) Remove the screw (M1.4 � 2.5) 2. Remove the claw D of the guide rail T2 3 from the hole E of the drum base assembly in the direction of the arrow F. Remove the three screws (M1.4 � 2.5) 4. Remove the drum base assembly 5 in the direction of the arrow. Remove the screw (screw assy PW M1.7 � 2.6) 6. Remove the drum earth 7 and earth spacer 8.

2. Attachment procedure
1) Attach the ground spacer 8 and drum ground 7 with the screw (screw assy PW M1.7 � 2.6) 6. Tightening torque: 0.078 ± 0.01 N�m (0.8 ± 0.1 kgf�cm) Align the drum base assembly 5 with the reference pin and tighten the three screws (M1.4 � 2.5) 4 in the order of G, H and I. Insert the claw D of the guide rail T23 into the hole E of the drum base assembly 5 and tighten the screw (M1.4 � 2.5) 2. Tightening torque: 0.078 ± 0.01 N�m (0.8 kgf�cm) Remove the drum assembly. (Refer to 4-1.) Attach the flexible wiring board (FP-300) 1 and capstan flexible board to the drum base assembly. Clean the tape running path. (Refer to 2-2.)

2) 3) 4) 5) 6) 7) 8)

2)

3)

4) 5) 6)

G F

hole E
H I 4 Three screws (M1.4 � 2.5) 5 Drum base assembly

2 Screw (M1.4 � 2.5)

Guide rail (T2) Remove the guide rail (T2) in the direction of the arrow F.

Claw D

Drum base assembly

3 Guide rail (T2)

Remove the flexible board in the direction of the arrow A B C. FP-300 flexible board
C B 6 Screw (screw assy PW M1.7 � 2.6) 7 Drum ground Z Y X A 8 Ground spacer

Two dowels

Claw D

Capstan flexible board

1 FP-300 flexible board, Capstan flexible board

Fig. 4-3.

� 16 �