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7-27. SCHEMATIC DIAGRAM – PANEL Section –
1
2
3
PANEL BOARD
A
B
C
CN601
27P
VF
27
D
VF
26
-VFL
25
D-GND
24
VREF
23
VDD+3.3V
22
R755
3.3k
KEY0
21
R756
3.3k
KEY1
20
R757
3.3k
KEY2
19
R758
3.3k
KEY3
E
KEY3
18
JOG
JOG
17
VOL
VOL
16
CS
VFD-CS
15
RESET
H
VFD-RESET
14
ST1
STREAM1
13
ST2
MAIN
STREAM2
12
BOARD
ST3
STREAM3
11
F
(1/4)
ST4
CN901
STREAM4
10
ST5
(Page
STREAM5
9
ST6
STREAM6
8
38)
SW-LED
SW-LED
7
STBY
STBY-LED
6
SIRCS
SIRCS
5
DATA
VFD-DATA
4
CLK
VFD-CLK
3
G
LED+9V
2
LED-GND
1
1
STBY-LED
STBY
D-GND
H
S
KEY0
SIRCS
SIRCS
KEY LEFT
AVREF
BOARD
LED+9V
(Page 53)
7
SW-LED-OUT
I
J
K
L
HCD-GT22/GT44/GT55
• See page 36 for Waveforms.
• See page 58 for IC Block Diagrams.
4
5
6
7
1
2
5
6
7
8
9
10 11 12
13
14
C732
C731
2.2
2.2
50V
50V
R715
22
R716
22
C709
R601
S601
C708
C707
C706
22
330
0.1
0.1
47
50V
DISPLAY
10V
CLK
DATA
R702
R612
R613
R614
R615
R611
470
680
1k
1.5k
330
CS
RESET
(GT22/GT44)
EQ BAND
ILLUMINATION
ERASE
PRESET
GROOVE
SURROUND
EG
PLAY MODE/
TUNING MODE
R624
R621
R622
R623
R625
R626
1k
330
470
680
1.5k
2.2k
ENTER
RETURN
+
TUNING+
TUNING-
-
1L434FV22DOTDF01(GT22/GT44)
1L434B22COCDT2(GT55)
(GT44/GT55)
7.6
7.6
0.1
0.1
0.1
0.1
7.6
0
0
0.7
0.7
0.7
0.7
0
R681
R682
R683
R685
R686
R687
R684
10k
10k
10k
10k
10k
10k
10k
8
9
10
11
FL701
FLUORESCENT INDICATOR TUBE
15
16
17
18
19
20
21 22
23 24
37
38
39
40
41
42
43
44
45
46
39
38
37
36
35
34
33
32
31
30
29
28
27
-26
40
VFDP
41
41
NC
3.3
42
VDD
DR21(S14)
43
NC
IC701
DR20(S15)
44
VSS
DR19(S16)
1.7
FLUORESCENT
45
XT
INDICATOR TUBE DRIVER
DR18(S17)
1.7
C705
46
XTb
IC701
DR17(S18)
100p
R701
R705
NJU3427FA2
47
NC
DR16(S19)
100
4.7k
3
48
SCK
DR15(T15)
C701
100
1000p
2.7
49
SI
DR14(T14)
C702
1000p
R703
50
NC
DR13(T13)
100
2.6
51
CSb
DR12(T12)
C703
1000p
3.2
52
RSTb
R704
C704
100
1000p
1
2
3
4
5
6
7
8
9
10 11 12 13
(GT55)
R725
R726
R727
R728
R721
R722
R723
R724
47k
47k
47k
47k
47k
47k
47k
47k
D601-604
(STREME)
∗
D601-606
Q601-607
LED DRIVE
R741
47k
51
51
12
13
14
15
47
48
49 50
53
54
IC B/D
-23.7
P13
DR23
26
(S12)
-20
P14
DR22
25
(S13)
-23.7
P15
24
-25.5
P16
23
-16.3
P17
22
-21.8
P18
21
-23.7
P19
20
-25.5
P20
19
18
3.3
R734
17
47k
-24
-23.8
16
-24
15
NC
14
-24.3
R733
3.3
47k
-23.8
-24.3
Q713
2SC3052EF-T1-LEF
R732
R729
R753
R730
R731
47k
47k
47k
47k
47k
Q701-714
GRID DRIVE
R754
47k
CN605
3P
1
D-GND
KEY3
2
KEY3
3
KEY
VOL
VOL 1
JOG
JOG
D-GND
AVREF
4
HCD-GT22/GT44/GT55
16
17
18
19
S651
VOLUME BOARD
ROTARY ENCODER
MASTER
VOLUME
R768
47k
2
1
3
R767
100k
R761
R762
C651
C652
1
VOL
22k
22k
0.01
0.01
JOG
D-GND
AVREF
4
C653
C654
R763
R764
0.01
0.01
22k
22k
2
1
R766
47k
3
R765
100k
S652
ROTARY ENCODER
OPERATION
DIAL
R
KEY RIGHT
BOARD
CN615
(Page 53)
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