Block Diagram; Disassembly Procedure; Ground - Yamaha DG60-112 Service Manual

DG60-112

BLOCK DIAGRAM

6
REVERB (VR209)
PRESENCE (VR208)
BASS (VR207)
LOW MID (VR206)
HIGH MID (VR205)
TREBLE (VR204)
MASTER (VR203)
GAIN (VR202)
AMP SELECT (SW402)
REVERB (VR309)
PRESENCE (VR308)
BASS (VR307)
LOW MID (VR306)
HIGH MID (VR305)
TREBLE (VR304)
MASTER (VR303)
GAIN (VR302)
AMP SELECT (SW401)

DISASSEMBLY PROCEDURE

1. Pre-Main Unit
1-1 Remove the four (4) screws marked [70]. The back board
(U) can then be removed. (Fig. 1)
1-2 Remove the speaker wires and the screw marked [120].
(Fig. 1)
1-3 Remove the four (4) screws marked [30]. The pre-main
unit can then be removed by sliding it backward. (Fig. 1)
2. Speaker
2-1 Remove the four (4) screws marked [70]. The back board
(U) can then be removed. (Fig. 1)
2-2 Remove the four (4) hexagonal nuts marked [60]. The
speaker can then be removed. (Fig. 1)
[30]
Speaker
3. DM Circuit Board
3-1 Remove the pre-main unit. (See Procedure 1.)
3-2 Remove the BLEND knob marked [90A], the four (4)
hexagonal nuts marked [130A], the hexagonal nut marked
[190] and the hexagonal nut marked [210].
3-3 Remove the five (5) screws marked [80A]. The DM
circuit board can then be removed. (Fig. 2)
3-4 Remove the button marked [100A] form the DM circuit
board. (Fig. 2)
Pre-main unit
[120]
Speaker wire
[70]
Back board (U)
[60]
[30]: Oval Head Screw 5.0X35 MFC2BL (VP104600)
[60]: Hexagonal Nut 4.0 MFZN2Y (03760900)
[70]: Oval Head Yapping Screw-1 4.0X30 MFC2BL (EN240090)
(Fig. 1)
Speaker