– 25 –
– 26 –
– 27 –
– 28 –
• IC Block Diagrams
IC301 TA2123AF (EL)
IC302 LA3235W
IC306 NJM2072M
IC601 TLP326ADB
IC702 XC6371C301PR
IC305 LA7473V-TLM
PRE A
PRE B
MIX
PW B
PW A
PW C
BST
MT TC
BASE
RF IN
PW GND
OUT B
OUT C
OUT A
VCC
RF OUT
VREF OUT
BST NF
BST OUT
PW IN C
LPF
EQ A
PW NF A
PW IN A
PW IN B
PW NF B
3
IN A-R
5
PRE NF-A
6
PRE OUT A
7
MTL DRV A
8
MTL DRV B
9
PRE OUT B
10
PRE NF-B
11
AMS IN
12
IN B-R
4
IN B-F
2
IN A-F
1
21
20
19
18
17
GND
16
AMS DET
15
AMS MIX
14
AMS SW
13
22
23
24
38
C-AMP SW
37
PW SW
42
MT SW
41
F/R SW
44
BST SW
43
M/N SW
46
PRE GND
47
VREF IN
48
PRE SW
45
AMS OUT
40
BEEP
39
262728293031323334
DET
36
AGC IN
35
+
–
+
–
+
–
+
–
+
–
+
–
EQ B
25
RIPPLE
FILTER
AGC
DET
BEEP
VREF
SWITCH
COMPARATOR
MTL DRV
30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
151413121110987654321
+
–
+
–
+
–
+
–
+
–
+
–
+
–
+
–
+
–
MIC VCC
BIAS
RIPPLE
FILTER
VCC
+
–
INPUT
SELECT
EXT IN R
EXT AMP
NFB1 R
EXT AMP
NFB2 R
MIC VCC
HPF ON
INT IN R
INT AMP
NFB R
GND
INT AMP
OUT R
MIX BUF
IN R
HPF IN R
OUT R
EXT/INT
MIX AMP
OUT R
MIC
MONO
BIAS
OUT L
HPF IN L
MIX AMP
OUT L
INT AMP
OUT L
INT AMP
NFB L
RIPPLE
FILTER
EXT AMP
FNB2 L
EXT AMP
FNB1 L
INPUT
SELECT
EXT IN L
VCC
INT IN L
MIX BUFF
IN L
OFF
OFF
HPF ON
HPF ON
INT
INT
EXT
EXT
36 35 34 33 32 31 30 29 28 27 26 25
1 2 3 4 5 6 7 8 9 10 11 12
37
38
39
40
41
42
43
44
45
46
47
48
24
23
22
17
16
15
14
13
SYSTEM CONTROL
ALC
+
–
+
–
+
–
+
–
+
–
+
–
+
–
+
–
MIC REGULATOR DETREC BIAS REGULATOR
ALC
21
20
19
ALC
+
–
+
–
ALC
18
VCC2
REC (FWD)
PLAY/
REC (REV)
REC (REV)
PLAY/
REC (FWD)
REC (REV)
PLAY/
REC (FWD)
REC (FWD)
PLAY/
REC (REV)
PLAY
REC
MIC 1
RADIO 1
RADIO 2
MIC 2
MIC MONITOR 1
MIC MONITOR 2
VREF
REC1 REV
REC2 REV
REC2 FWD
REC1 FWD
NC
REC MUTE
MIC/RADI
FWD/REV
REC/PLAY
CONT F
CONT A
CONT B
CONT C
CONT D
CONT E
NC
GND
MIC IN1
NF1
MIC OUT2
MIC OUT1
REC IN1
REC IN2
NC
RADIO IN1
MIC IN2
NF2
RADIO IN2
NC
REF
VREF
GND
REC1 REV
REC2 REV
REC2 FWD
REC1 FWD
VCC2
MIC MONITOR 1
MIC MONITOR 2
NC
NC
MIC REG REF
MIC REG
BIAS REG REF
BIAS REG
OSC
BASE
VCC1
VCCRF
ALC
GND
NC
1
2
3
4 5
6
7
8
INPUT
GAIN CONT
AMP OUT
GND
VCC
OUTPUT1
RECOVERY
TIME CAP
OUTPUT2
30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
START-UP
CONTROL
SERVO,
AMP
TIMING
CONTROL
SOFT SWITCHING
DRIVE
OUTPUT DRIVE,
BUFFER
OSC
DIRECTION
CONTROL
THERMAL
SHUT DOWN
REFERENCE
VOLTAGE
GENERATOR
INVERSE
VOLTAGE
DETECT
BRAKE
SIGNAL
DETECT
SAW
PULSE
VREF
REV
CSTART
WIN
CSOFT1
CSOFT2
WB
VB
GND
PGND
NC
W
PGND
START
VI-IN
IV-IN
IV-OUT
VCC
COM
BUFF OUT
BUFF IN
VIN
UIN
UB
PGND
U
PGND
V
ENABLE
EXOR
1
2
3
5
4
CHIP ENABLE
SLOW START
PHASE COMP
VLX LIMITER
PWM CONTROL
OSC 50/100/180kHz
+
–
NC
VOUT
CE
VDD
VSS
LX
VREF
BUFFER
ERROR
AMP
6-5. IC PIN FUNCTION DESCRIPTION
• MAIN BOARD IC701 MB-89133LPFV-G-570BND (SYSTEM CONTROLLER)
Pin No. Pin Name I/O Description
1
AVCC — Power supply terminal (+3V) (for A/D converter)
2 RST I
System reset signal input from the reset signal generator (IC703) “L”: reset
3, 4
MODE2, MODE1 I
Test input terminal Normally: fixed at “L”
5
X0
I
Main system clock input terminal (4MHz)
6, 7
NC — Not used (open)
8
X1 O Main system clock output terminal (4MHz)
9
VCC — Power supply terminal (+3V)
10
X0A
I
Sub system clock input terminal (32.768kHz) Not used (fixed at “L”)
11, 12
NC — Not used (open)
13
X1A O Sub system clock output terminal (32.768kHz) Not used (open)
14
CUE/REVIEW
O
When cue/review, audio attenuate signal output terminal
“H”: cue/review (normally output “L”)
15
MOTOR BRK
O
Motor brake on/off signal output to the capstan/reel motor driver (IC601)
“H”: brake on (normally output “L”)
16
PM CTL O Plunger (PM701) drive signal output terminal “H”: plunger on
17
NC — Not used (open)
18
SPEAKER CTL O
Power on/off control signal output to the speaker output circuit
“L”: used headphone, “H”: speaker output
19
VOICE UP CTL O
Power on/off control signal output to the voice-up circuit
“L”: voice-up on, “H”: voice-up off
20
MUTE CTL
O
Muting signal output to the PB amp (IC301) “L”: mute on, “H”: mute off
21
NC — Not used (open)
22
AMP CTL
O
Power output terminal (+3V)
23
F/R CTL
(PLAY)
O
FWD/REV selection signal output to the PB amp (IC301) and head switching circuit
“L”: FWD direction (PB) /REV direction (REC),
“H”: REV direction (PB) /FWD direction (REC)
24
HP DET
I
Detection signal input of headphones on/off “H”: headphones on
25
VSS — Ground terminal
26
REC MUTE
O
Muting signal output to the REC amp (IC302) “L”: muting on, “H”: muting off
27
REC CTL
O
REC on/off control signal output to the REC amp (IC302) “L”: recording
28
NC — Not used (open)
29
F/R CTL (REC)
O
FWD/REV selection signal output to the REC amp (IC302)
“L”: REV direction, “H”: FWD direction
30
REC CTL2
O
Power on/off control signal output to the recording circuit “L”: recording
31
LED OFF
O
The signal output to the goes off LED circuit for REC LED (D1)
Output “H” only when recording is paused “H”: goes off the LED
32
NC — Not used (open)
33
VOR IN
I
VOR REC pausing signal input from the VOR detector (IC306) “L”: record is paused
34
PHOTO IN I Rotation detect signal input of the capstan/reel motor (M601)
35
R TUME I REC protect detect (REV) switch (S702-1) input terminal “L”: no protection, “H”: protected
36
F TUME I REC protect detect (FWD) switch (S703-1) input terminal “L”: no protection, “H”: protected
37
HOLD SW I Hold detect input from the HOLD switch (S704) “L”: hold, “H”: hold off
38, 39
NC — Not used (open)
40
VOR SW I VOR switch (S301) input terminal “L”: VOR off, “H”: VOR on
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
http://www.xiaoyu163.com
http://www.xiaoyu163.com
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