Ic Pin Function Description - Sony WM-FX673 Service Manual

Q Q
7
3
• Waveform
– MAIN BOARD –
1 IC3 &¢ (X OUT)
500 mV/DIV, 5 µs/DIV
1.3 Vp-p
75 kHz
T E
L 1 3
w w w
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1 5
6 3
• IC Block Diagrams
IC1 TA7371AF-EL IC2 TA2022AFN-EL
8 7 6 5 24 23 22 21
REGULATOR SWITCH
PILOT
RF MIX
AMP AMP
OSC AF AMP
AM
AM DET
1 2 3 4
FM DET
FM
OSC MIX
IF AMP IF AMP
1 2 3 4 5
IC301 TA2123AF (EL)
9 4 2 2 9 6 5 1 3
36 35 34 33 32 31 30 29 28 27 26 25
BST
AGC
–
DET
+
–
+
PW B
C-AMP SW 37
MT TC 38 PW A
PW C +
BEEP 39 BEEP –
AMS OUT 40
RIPPLE
FILTER
MT SW 41
PW SW 42
SWITCH
BST SW 43
COMPARATOR
F/R SW 44
PRE SW 45
PRE A PRE B
M/N SW 46
MIX
PRE GND 47
VREF IN 48
VREF
MTL DRV
1 2 3 4 5 6 7 8 9 10 11 12
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1 5
0
IC302 NJM2185AV-TE2
14 13 12 11 10 9
20 19 18 17 16 15 14 13
G2 G1
φ∠0° φ∠90° +
VCO ST
BIAS
FM IND –
CIRCUIT
DIVIDE SUM
PRE
WEIGHT
AM IF
DECODE
GM
A-CH BLOCK
STOP
B-CH BLOCK: SAME AS A-CH.
PULSE
AM
AGC
1 2 3 4 5 6
6 7 8 9 10 11 12
IC601 MM1279XVBE
Q Q
3 7
V 1
PW 2
PRE DRIVER
MOTIVE
W 3
CONTROL
GND 4
24 RF IN CIRCUIT
23 PW GND
22 OUT B
21 OUT C MOTIVE/
OSC 5 MOTIVE
SOFT SWITCH
OSC
LOGIC
20 OUT A
DR 6
19 VCC
BIAS
VREF 7
SPEED CURRENT
REFERENCE
CONTROL CONTROL
START 8 VOLTAGE
18 BASE
OUTPUT
INVERTER
17 RF OUT BIAS
16 GND VSP 9 –
15 AMS DET
+
IN+ 10
14 AMS MIX
13 AMS SW
u 1 6 3
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6-5. IC PIN FUNCTION DESCRIPTION

• MAIN BOARD IC3 TC9327AF-606 (SYSTEM CONTROLLER, LIQUID CRYSTAL DISPLAY DRIVER)
Pin No. Pin Name
1 to 4 COM1 to COM4
8 5 to 22 S1 to S18
DOLBY VCC
23
V/I
24 SPEED CTL
25 RADIO/MIC
26 F/R CTL (REC)
27 PRE CTL
28 MUTE CTL
29 F/R CTL (PLAY)
7
30 BAND FM/AM
31 R DATA OUT
32 F TUME
33 R TUME
34 R DATA IN
35 HOLD SENS
6 20 PV 3 1 5 1 5 0 8
19 U
36 OSC CTL
37 AMS IN
38 PHOTO CTL
18 PU
17 GND
39 PHOTO IN
16 VCC
15 FC
40 DDC1 CTL
TC1
14 41 HOLD SW
13 TC2
42 BATT DET
43 KEY IN
12 R1
44 F/R SW
11 OUT
45 A/D REF
46
47 M DATA I/O
48 M CLOCK
49
50 MOTOR CTL
51 MOTOR DIR
m
52
c o
53 REC CTL
.
54 AVLS CTL
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2
9 8 9 9
I/O Description
O Common drive signal output to the liquid crystal display (LCD1)
O Segment drive signal output to the liquid crystal display (LCD1)
Power on/off control signal output of the dolby NR amp (IC302)
O
CTL "L": power on, "H": power off
Motor speed control signal output to the capstan/reel motor driver IC (IC601)
O
"L": normal speed, "H": 1/2 speed
O Not used (open)
O Not used (open)
O Preamp on/off control signal output to the TA2123AF (IC301) "L": tape play, "H": radio on
O Power on mute control signal output to the TA2123AF (IC301) "L": mute on
Forward/reverse selection signal output to the TA2123AF (IC301)
O
"L": reverse direction, "H": forward direction
Power on/off control signal output of the FM circuit
O
"L": power on (FM on), "H": power off (AM or tape on)
O Remote control data output to the remote commander
I "H" is input when amplifier on mode
I "H" is input when amplifier on mode
I Communication request input from the remote commander
Hold status input of the HOLD switch (S2) "L": hold off, "H": hold on
I
"H" is input when key pressing at hold mode
9 2 4 9 8 2 9 9
Motor restart control signal output to the capstan/reel motor driver IC (IC601)
O
"L": BL skip status, "H": FF/REW motor rotation status
Whether a music is present or not from TA2123AF (IC301) is detected at auto music sensor
I
"L": music is present, "H": music is not present
Control signal output to the capstan/reel motor rotation detect circuit
O
"L": rotation detect circuit on
I Rotation detect signal input of the capstan/reel motor (M601)
Power on/off control signal output of the DC/DC converter circuit
O
"L": power off, "H": power on
I Hold detect input from the HOLD switch (S2) "L": hold on
I Battery voltage detection signal input (A/D input)
I Key input terminal (A/D input)
I Tape direction switch (S1) input terminal (A/D input) "L": forward position
I Reference voltage (+1.6V) input for the A/D converter
CS O Chip select signal output to the EEPROM (IC4)
I/O Two-way data bus with the EEPROM (IC4)
O Serial clock signal output to the EEPROM (IC4)
BEEP O Beep sound signal output to the TA2123AF (IC301)
Motor start control signal output to the capstan/reel motor driver IC (IC601)
O
"L": motor off, "H": motor on
Motor direction control signal output to the capstan/reel motor driver IC (IC601)
O
"L": clockwise, "H": counterclockwise
TAPE I Cassette tape detect switch (S901-1) input terminal "L": cassette detected, "H": no cassette
O Not used (open)
AVLS (Automatic Volume Limiter System) on/off control signal output terminal
O
"L": AVLS on "H": AVLS off
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