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CIRCUIT DIAGRAM
1
2
3
EH-B
1703
+MOTOR
11.9V
2
+MOTOR
1
GND_M
A
M
FE-BT-VK-N 1706
STROBE
STROBE
7
DATA
DATA
6
CLK
CLK
5
GND_P
P
4
+5V
+5V
3
B
AD1
2
CR_IN
1
TO / FROM
FRONT BOARD
C
D
3749
120R
A
Rch
3750
Lch
E
120R
A
FE-ST-VK-N
REC/PB
1710
F
GND_A
1
Erase
A
2
3
Rch
4
Common
0.0V
5
Lch
7786
J112
2732
A
G
PB_Lin
3781
1u
-C
4M7
3779
6773
0.0V
2786
3780
330K
6774
100p
1M
1N4148
18.7V
1N4148
A
A
+12V
A
3762
820R
H
11.6V
BC557B
P
7782
11.0V
P
7783
BC847B
7
8
MT1
MT2
3770
3771
3
6
3.3V
1.6V
P
5
1K5
1K2
2
3.1V
*
I
2782
1
4
0.7V
P
3777
7781
4n7
BC817-25
CLNS-2A833 YEZ
150R
3776
5703
0.3V
6K8
2743
ERASE
A
22n
P
OSCILLATOR
A
A
P
P
P
1
2
3
9-5
4
5
6
P
P
SHIFT REGISTER
8
VSS
7
0.0V
CR_BIAS
O3
Os'
10
11
5.0V
MOT
O7
Os
9
0.0V
SOL
STR
7610
O5
1
13
HEF4094BT
0.0V
MUTE_OFF
O6
12
D
2
O4
14
0.0V
CR_SEL
CP
O0
3
4
5.0V
REC
O1
5
0.0V
BIAS_OFF
O2
6
VDD
E0
16
15
2625
P
100n
+5V
AD1
DATA
CR_IN
*
4737
(NAR)
CR_SEL
PB_Rin
*
*
3723
3717
(AR)
18K
1K2
*
2727
2717
2n2
15n
4736
(NAR)
*
*
*
3724
3718
(AR)
18K
1K2
*
2728
2718
*
*
REC EQ
2n2
15n
+12V
3794
BC847B
7794
1K
7792
3795
BC847B
BC847B
7793
1K
3792
47K
A
A
A
A
BIAS_OFF
CR_BIAS
REC_Lout
BIAS
6778
LEVEL
*
3769
22K
+12V
1N4148
6776
11.7V
1N4148
0.0V
3786
BIAS_OFF
7780
BC847B
22K
P
P
4
5
6
7
8
9
10
7612
+MOTOR
PMBT 2907
11.8V
11.9
V
+MOTOR
7614
PMBT 2907
11.0V
(11.0V)
1.1V
0.7V
3678
7618
BC847B
47K
M
(1.1V)
(0.7V)
3680
7620
BC847B
47K
M
REC
MUTE_OFF
3790
22K
2721
REC_Rout
2715
3709
1u
33R
100u
A
2713
PB_Rout
A
A
100n
A
REC_Rin
*
2791
2709
1n5
1n
A
3711
100R
+12V
A
AN17150A
PRE_AMP_VCC
7720
TAPE PRE-AMP IC
REJECTION
RIPPLE
A
A
3712
100R
*
2790
2710
1n
1n5
A
A
A
2722
1u
A
A
A
7
8
9
10
9-5
11
12
13
sol_supply
(11.8V)
+5V
M
+5V
BC847B
7624
(0.3~1.5V)
(0.8~2.1V)
3686
(0.3~1.5V)
100K
-C
MUTE_OFF
REC
A
3745
TAPE_L
3746
1K2
TAPE_R
1K2
11.9V
+12V
2788
A
22n
3735 22K
REC_Lin
3736
REC_Rin
22K
A
A
A
A
A
A
A
A
TAPE_R
TAPE_L
0.0V
0.6V
+12V
3737
BC847B
7789
1K
A
3800
0.0V
22K
0.6V
3738
0.8V
BC847B
7790
1K
BC847B
REC_Lin
A
A
A
** - Provision Part
DC Voltages measured with Fe Recording.
xxV - Voltages during Solenoid On.
* - Variant Parts between AR and NAR versions : please refer to table below;
AR
NAR
3723
18K
22K
3724
18K
22K
3717
1K2
Jumper (4737)
3718
1K2
Jumper (4736)
2717
15n
Open
2718
15n
Open
2790
1n5
Open
2791
1n5
Open
3769
22K
18K
3772
15K
12K
3139 118 54891_8239 210 90143...for 3455 pt3_dd wk0411
11
12
13
14
1701 D14
3786 I5
1703 A1
3789 I4
1706 A1
3790 D9
1710 F1
3791 G9
1760 A14
3792 F6
2621 A3
3793 F5
2622 A3
3794 F5
2623 A3
3795 F5
2625 C5
3796 E10
2701 D2
3797 C11
TO / FROM
2702 E3
3800 G11
A
2703 E13
4736 D5
MECHANISM
2704 F12
4737 D5
2709 E7
5701 G2
FE-ST-VK-N
2710 G7
5703 I1
1760
1
2711 D9
6612 A10
Vcc12V
2712 I8
6770 H2
2
2713 D9
6771 H2
PHOTO
2714 I8
6772 H1
3
GND_M
2715 D8
6773 G2
4
2716 H8
6774 G3
MODE
2717 D5
6776 I4
5
2718 E5
6777 H3
sol_supply
2719 F4
6778 H5
B
6
CR_IN
2720 F4
7610 B5
7
2721 D7
7612 A9
REC_FWD
2722 H7
7614 A10
8
2723 D7
7618 B9
REC_RVS
2724 H7
7620 B10
2725 D10
7624 C11
2727 D3
7720 F8
2728 E3
7780 I4
2729 E8
7781 I3
2730 H8
7782 H2
2731 E9
7783 I2
C
2732 G2
7784 G3
2743 I1
7786 G2
2
2747 D13
7788 G14
2761 F10
7789 G12
1
2768 H13
7790 G12
2769 E12
7792 F6
2770 F11
7793 F4
TO / FROM
2780 I4
7794 F4
AF BOARD
2781 I3
2782 I2
1701
2784 I1
FE-BT-VK-N
2785 I2
3768
-9.0V
D
2786 G1
7
-CMOS
2787 H3
10K
TAPE_R
6
2788 E13
2789 E9
+12V
5
2790 G8
2791 E8
4
TAPE_L
2793 F8
GND_A
3
2794 G8
A
2795 G5
REC_R
2
2796 G9
REC_L
2797 G9
1
REC_L
REC_R
2798 E9
E
2799 F10
3607 A11
3608 B10
3609 A11
3610 B11
3611 A10
4
3612 B11
3614 C11
3
3624 A9
3626 A10
3628 A9
F
3630 A9
3678 B8
MUTING CIRCUIT
3680 B9
3686 C11
3709 D8
MUTE_OFF
3710 I8
3711 E7
3712 G7
3717 D5
3718 E5
3719 E4
3720 E5
G
3721 E4
3722 E4
3723 D3
7788
3724 E3
3733 E13
3734 F13
3740
3735 E13
47K
3736 E13
0.0V
3737 G13
3738 G12
3739 G13
H
3740 G14
3743 E12
3744 F11
3745 D12
3746 D11
3749 D2
3750 E2
3762 H2
3764 F10
3768 D13
3769 H5
3770 I2
I
3771 I3
3772 I3
3774 H3
3775 I3
3776 I2
3777 I2
3778 H1
3779 G3
3780 G2
3781 G2
14
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