Yamaha DG60-112, Service Manual

Page: 6 / 27

DM
SW
MAIN
INPUT
HIGH
INPUT
LOW
PEAK
ACH
BCH
IC201
JK202 JK201
IC202
IC1 IC2
97
IC201
LD201
84
81
3
12
AMP SELECT (SW401)
GAIN (VR302)
MASTER (VR303)
TREBLE (VR304)
HIGH MID (VR305)
LOW MID (VR306)
BASS (VR307)
PRESENCE (VR308)
REVERB (VR309)
AMP SELECT (SW402)
GAIN (VR202)
MASTER (VR203)
TREBLE (VR204)
HIGH MID (VR205)
LOW MID (VR206)
BASS (VR207)
PRESENCE (VR208)
REVERB (VR209)
14
15
11
1
5
2
4
12
14
15
11
1
5
2
4
13
80
85
83
31
3
82
31
47
21 21
67
31 5
26
7
57
27
MUTE
IC4
MUTE
MUTE MUTE
BLEND
IC6
VR1
75
IC6
JK4
SW3 SW2 98
TEST SP MUTE
BUF
(IC21)
97
95,96
6,7
9,12
2,5
47
11
14
JK5
SW202
BCH
LD402
LD401
ACH
31
EFECT
DRY
MUTE
CH SELECT A/B REVERB ON/OFF
+B/-B
+15V/-15V
+5V
MUTE
IC5
31
IC5
3
+R -R A/D -L
R
D/A
L
+L
4
67
4
5 6 AK4520A-VF-E2
ADC/DAC
DSP3
YSS228E-F
(IC14)
MPX
(IC19)
MPX (IC20)
CPU HD6473042FP16
(IC17)
DSP2
YSS228E-F
(IC15)
DRAM
4M
(IC16)
(IC3)
LINE
OUT/HEAD
PHONES
SEND
PUSH SW.
RETURN
SP '12
8
AC
POWER
SW
0/-20 dBm
JK3 JK2
SW1
JK1
BT202
D201,202
POWER
AMP
BT203 SW201
PUSH SW.
CH A/B
KEC-54180
POWER SUPPLY
A-CH
BLOCK DIAGRAM DISASSEMBLY PROCEDURE
DG60-112
6
[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)
[70]
[120]
[30]
[60]
Pre-main unit
Back board (U)
Speaker
Speaker wire
Speaker
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)
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)