Ground - Yamaha DG60-112 Service Manual

4. MAIN (1/5-5/5), A-CH and SW Circuit
Boards
4-1 Remove the pre-main unit. (See Procedure 1.)
4-2 Each circuit board can then be removed in its manner as
below. (Fig. 2)
MAIN 1/5 Circuit Board
Remove the eight (8) knobs marked [90B], the eight (8)
hexagonal nuts marked [A], the two (2) hexagonal nuts
marked [130B] and the five (5) screws marked [80B].
Remove the knob marked [100B] and the knob marked [110]
from the MAIN 1/5 circuit board. (Fig. 2)
MAIN 2/5 Circuit Board
Remove the screw marked [290A]. (Fig. 2)
MAIN 3/5 Circuit Board
Remove the screw marked [290B]. (Fig. 2)
MAIN 4/5 Circuit Board
Remove the screw marked [290C]. (Fig. 2)
MAIN 5/5 Circuit Board
Remove the screw marked [290D]. (Fig. 2)
A-CH Circuit Board
Remove the eight (8) knobs marked [90C] and the eight
(8) hexagonal nuts marked [B]. (Fig. 2)
SW Circuit Board
Remove the two (2) knobs marked [90D] and the two
(2) hexagonal nuts marked [C]. (Fig. 2)
5. Power Transformer
5-1 Remove the pre-main unit. (See Procedure 1.)
5-2 Remove the four (4) screws marked [270]. The power
transformer can then be removed. (Fig. 2)
[90A] [190]
[210]
[80A]
DM
[80B]
[130B]
MAIN 1/5
MAIN
[100A]
[130A] [130A]
[100B] [90D], [A]
SW
[80]: Bind Head Tapping Screw-B 3.0X8 MFZN2BL (EP600190)
[130]: Hexagonal Nut 9.0 12X2 MFNI33 (LX200060)
[190]: Hexagonal Nut 12.0 14X2 MFC2BL (VD794100)
[210]: Hexagonal Nut 9.0 11X2 MFZN2BL (VJ388000)
[270]: Bind Head Tapping Screw-C A4.0X8 MFZN2BL (VC688900)
[290]: Bind Head Screw SP 3.0X12 MFZN2Y (VB763800)
2/5 MAIN 3/5
[290A] [290B] [290C] [290D]
[90C], [B]
[80B]
[90B], [A]
(Fig. 2)
DG60-112
Power transformer
[270]X4
MAIN 5/5
MAIN 4/5
A-CH
[110]
7