HCD-EC68/EC78
HCD-EC68/EC78
30
30
0
0
2
0
0
35.2
0
0
0
0
36.7
-36.8
-35.2
0
0
0
0
0
0
C166
4700p
50V
C151
1
50V
C152
1
R175 220
R177 220
R178 220
R176 220
2W
R179
0.22
2W
R180
0.22
R185
2.2k
R186
2.2k
2SA2026
Q151
2SA2026
Q152
MC2838-T112-1
D151
1
9
8
7
6
5
4
3
2
15
14
13
12
11
10
C156 100p
C155
100p
C159
3p
C160
3p
C170
∗
C169
∗
R173
1k
R164
47k
R163
47k
R155
47k
R156
47k
R151
1.8k
R152 1.8k
C153
470p
C154
470p
C178
0.1
R159
1k
R160
1k
C161
0.01
C162
0.01
0.1
C174
0.1
C173
R172
100
R181
1.2k
R182
1.2k
R183
22k
R184
22k
TP151
TP152
TP153
TP154
TP155
TP156
TP157
TP158
TP159
TP160
R162 470
R161 470
1
2
3
4
5
5P
CN152
PROTECT
AMP-ON
IN-L
A-GND
IN-R
MA2J1110GLS0
D152
1
2
3
4
5
6
6P
CN151
PA-GND
OUT-R
+VH
NC
-VH
OUT-L
50V
C158 1
50V
C157 1
0
R171
470
R196
470
R195
C175
0.1
C176
0.1
R153
22k
R154
22k
OVER LOAD DETECT
Q151,152
HI AMP BOARD
IC151
POWER AMP
∗
C169, 170
100 50V (EC78: E2, E3, E51, MX, AR)
100 63V (EC78: AEP, RU)
7
D
B
6
9
5
3
1
C
8
4
A
2
B
E
B E
Q151
Q152
R151
R152
R153
R154
R155
R156
R159
R160
R161
R162
R163
R164
R172
R175
R176
R177
R181
R182
R183
R184
R185 R186
C153
C154
R195
C159
C160
C161
C162
C166
C173
C175
C176
C178
D151
D152
JR151
1
6
4 5
1
2
CN151
CN152
R179
R180
C151
C152
C157
C158
C169
C170
JW151
JW152
JW153
JW154
JW155
JW156
JW157
HI AMP BOARD
A
B
1
2
3
4
7-8. PRINTED WIRING BOARD - HI AMP Board (EC78) -
•
: Uses unleaded solder.
• See page 23 for Circuit Boards Location.
7-9. SCHEMATIC DIAGRAM - HI AMP Board (EC78) -
w w w . x i a o y u 1 6 3 . c o m
Q Q 3 7 6 3 1 5 1 5 0
9
9
2
8
9
4
2
9
8
T E L
1 3 9 4 2 2 9 6 5 1 3
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299