WM-EX527
16
16
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
V
1
PW
2
W
3
GND
4
OSC
5
DR
6
VREF
7
START
8
VSP
9
IN+ 10
PV
20
U
19
PU
18
GND
17
VCC
16
FC
15
TC1
14
TC2
13
R1
12
OUT
11
INVERTER
VOLTAGE
OUTPUT
BIAS
+
–
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
26
27
28
29
30
31
32
33
34
DET
36
AGC IN
35
+
–
+
–
+
–
+
–
+
–
+
–
EQ B
25
RIPPLE
FILTER
AGC
DET
BEEP
VREF
SWITCH
COMPARATOR
MTL DRV
• IC Block Diagrams
IC301
TA2123AF (EL)
IC601
MM1279XVBE
IC702
XC6371C251PL
6-5.
IC PIN FUNCTION DESCRIPTION
•
IC701 uPD789166GB-510-8ES (SYSTEM CONTROLLER)
Pin No.
Pin Name
I/O
Description
1
BATT DET
I
Battery voltage detection signal input (A/D input)
2
KEY IN
I
Key input terminal (A/D input)
3
F/R SW
I
Tape direction switch input terminal “L”: forward position
4
AMS IN
I
Whether a music is present or not from the audio master amp is detected at auto music sensor
“L”: music is present
5
OSC IN
I
Motor restart control signal input from the capstan/reel motor drive
“H”: FF/REW motor rotation status
6
NC
I
Not used
7
DOLBY KEY
CTL
I
Dolby is present or not control signal input terminal
“H”: Dolby is present (fixed at “L” in this set)
8
PHOTO IN
I
Rotation detect signal input of the capstan/reel motor
9
AVSS
—
Ground terminal (for A/D converter)
10
PHOTO CTL
O
Control signal output to the capstan/reel motor rotation detect circuit
“L”: rotation detect circuit on
11
AMP CTL
O
Also, this is used as control signal output for power on/off to the audio master amplifier, or power
supply output for the Dolby NR amplifier “H”: power on
Dolby NR amplifier: Not used in this set
12
WAKE UP
I
Input of acknowledge signal for the key entry Acknowledge signal is input to accept function in
the power off status On at input of “H”
13
TAPE SW
I
Cassette tape detect switch input terminal “L”: cassette detected
14
RMUM
I
Connection detection signal input of the remote commander
15
BEEP
O
Beep sound signal output to the audio master amplifier
16
F/R CTL
O
Forward/reverse selection signal output to the audio master amplifier
“L”: forward direction, “H”: reverse direction
17
VDD1
—
Power supply terminal (+2.5V)
18
AVLS CTL
O
AVLS (Automatic Volume Limiter System) on/off control signal output
“H”: AVLS on
19
GRV/MB CTL
O
Emphasizing sound control signal output to the audio master amplifier
“L”: MB (mega bass), “H”: normal/GRV (groove)
20
BST CTL
O
Bass boost control signal output to the audio master amplifier “H”: bass boost on
21
LED DOLBY
O
LED drive signal output of the Dolby NR indicator “L”: LED on Not used
22
IC0
—
Not used
23
XT2
O
Sub clock output terminal Not used
24
XT1
I
Sub clock input terminal Not used
25
RESET
I
System reset signal input from the reset signal generator “L”: reset
“L” is input for several 100 msec after power on, then it changes to “H”
26
X2
O
System clock output terminal (4 MHz)
27
X1
I
System clock input terminal (4 MHz)
28
VSS0
—
Ground terminal
29
VDD0
—
Power supply terminal (+2.5V)
30
R DATA OUT
O
Communication serial data output to the remote commander
31
LED BATT
O
LED drive signal output of the BATT indicator “H”: LED on
32
DOLBY CTL
O
Dolby on/off control signal output to the Dolby NR amplifier “L”: Dolby NR on Not used
33
MOTOR CTL
O
Motor start control signal output to the capstan/reel motor drive “H”: motor on
34
MOTOR DIR
O
Motor direction control signal output to the capstan/reel motor drive
“L”: counterclockwise, “H”: clockwise
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
