DCR-TRV130, DCR-TRV130E, DCR-TRV230, DCR-TRV230E, DCR-TRV235E, DCR-TRV325E, DCR-TRV330, DCR-TRV330E, DCR-TRV430E, DCR-TRV530, DCR-TRV530E, DCR-TRV725E, DCR-TRV730, DCR-TRV730E, DCR-TRV828, DCR-TRV828E, DCR-TRV830, DCR-TRV830E - Sony Movie Service Manual (repair manual). Page 16

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Fig. 4-3
4-3. Drum Base Assembly, Drum Earth
1. Removal procedure
1)
Remove the capstan flexible board and flexible wiring board
(FP-300) 1 from the holders X, Y and Z in the directions
of the arrows A, B and C.
2)
Remove the drum assembly. (Refer to section 4-1)
3)
Remove the screw (M1.4) 2.
4)
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.
5)
Remove the three screws (M1.4) 4.
6)
Remove the drum base assembly 5 in the direction of the arrow.
7)
Remove the screw (screw assy PW M1.7) 6.
8)
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)
2)
Align the drum base assembly 5 with the reference pin and
tighten the three screws (M1.4) 4 in the order of G, H and I.
Tightening torque: 0.078 
±
 0.01 N•m (0.8 
±
 0.1 kgf•cm)
3)
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.
Tightening torque: 0.078 
±
 0.01 N•m (0.8 kgf•cm)
4)
Remove the drum assembly. (Refer to 4-1.)
5)
Attach the flexible wiring board (FP-300) 1 and capstan
flexible board to the drum base assembly.
6)
Clean the tape running path. (Refer to 2-2.)
hole E
8
 Ground 
     spacer
7
 Drum 
     ground
6
 Screw
     (screw assy PW 
      M1.7)
4
 Three screws 
     (M1.4)
2
 Screw
     (M1.4)
3
 Guide 
     rail (T2)
5
 Drum base 
     assembly
Remove the guide rail 
(T2) in the direction 
of the arrow 
F.
F
Guide rail 
(T2)
Drum base assembly 
Two dowels
B
C
A
Remove the flexible board in the 
direction of the arrow 
A B C.
1
 FP-300 flexible board, 
     Capstan flexible board
FP-300 flexible board
Capstan flexible board
Claw D
I
G
H
X
Y
Z
Claw D
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