6-1
FRONT BOARD
TABLE OF CONTENTS
Variation Table and FTD Display pin connection ............ 6-1
Chip Layout...................................................................... 6-2
Component Layout .......................................................... 6-3
Circuit Diagram - Karaoke part........................................ 6-4
Circuit Diagram - Microprocessor part ............................ 6-5
Circuit Diagram - Headphone / Miscellaneous part ........ 6-6
Electrical Parts List .......................................................... 6-7
FTD DISPLAY PIN CONNECTIONS
6-1
FTD DISPLAY PIN NO.
FUNCTION
3
4
2
G
3
5
1
G
3
6
-
3
7
-
3
8
-
3
9
F
2
3
3
3
G
3
1
5
G
3
0
6
G
2
9
7
G
2
8
8
G
3
2
4
G
2
6
10
G
2
5
11
G
2
4
12
G
2
3
-
2
7
9
G
2
2
-
2
1
-
2
0
P
1
1
9
P
2
1
8
P
3
1
7
P
4
1
6
P
5
1
4
P
7
1
3
P
8
1
2
P
9
1
1
P
10
1
5
P
6
1
0
P
11
9
P
12
8
P
13
7
P
14
6
P
15
5
P
16
4
-
3
-
2
-
1
F
1
4G
a
h
j , p
k
b
f
m
g
c
e
r
n
d
-
-
-
10G
-
6G
a
h
j , p
k
b
f
m
g
c
e
r
n
d
-
-
-
12G
B1
B2
B3
B4
B5
-
-
-
-
5G
a
h
j , p
k
b
f
m
g
c
e
r
n
d
-
-
-
3G
a
h
j , p
k
b
f
m
g
c
e
r
n
d
-
-
-
1G7G
a
h
j , p
k
b
f
m
g
c
e
r
n
d
Col
Dp
-
8G
a
h
j , p
k
b
f
m
g
c
e
r
n
d
-
-
-
9G
a
h
j , p
k
b
f
m
g
c
e
r
n
d
-
-
-
11G
B1
B2
B3
B4
B5
B6
B7
B8
B9
B10
B11
B12
B13
-
P1
P2
P3
P4
P5
P6
P7
P8
P9
P10
P11
P12
P13
P14
P15
P16
2G
a
h
j , p
k
b
f
m
g
c
e
r
n
d
-
-
-
(Left)
(Middle)
(Right)
(Up)
(Low)
(1)
(2)
(3)
B5
B4
B1
B2
B3
B10
B9
B8
B7
B6
B5
B4
B3
B2
B1
B10
B9
B8
B7
B6
B13
B12
B11
B5
B4
B3
B2
B1
Col 1
(11G)
(12G)
a
k
h
f
b
j
Dp
n
g
m
p
e
c
r
d
(2G - 9G)
1G
2G
10G
11G
8G
9G
3G
4G
5G
6G
7G
12G 11G
Stroke Versions
Features / Item no. /21/21M/33 /30/37 Remarks
Simple Karaoke x -
Mic Detect x -
RDS - -
ECO Power LED - -
1800 x - Mic Socket
1802 x - Karaoke
3492 820R 820R NTC
3565 4R7 2R2 FTD Filament
3566 - 2R2 FTD Filament
3567 4R7 2R2 FTD Filament
3568 - 2R2 FTD Filament
4411 x - Karaoke
6429 x - Karaoke
9401 x - FTD Filament
9402 x - FTD Filament
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