Aiwa CT-X430M Service Manual page 12

Stereo car cassette receiver
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IC DESCRIPTION
IC, µPD178006AGC-538/IC, µPD178018AGC-555
Pin No.
Pin Name
I/O
1
AM/FM S-M
I
AF signal input during RDS AF operation and FM S meter signal input
2
LEVEL-M
I
Level meter signal input
3
A-VOL CONT
I
Detects microphone input for auto volume operation.Pulled down when not used.
4
CD CONNECT
I
CD changer connection check. Pulled down when not used.
Determines the timing with which data is transferred to the head unit.Open when not
5
CD DISP SEL
O
used.
6
CD CLO
O
Clock output to CD changer. Open when not used.
7
CD DI
I
Data input from CD changer. Pulled down when not used.
8
CD DO
O
Data output to CD changer. Open when not used.
9
CD CLI
I
Clock input from CD changer. Open when not used.
10
LCD CE
O
LCD DRV (LC75854W) CE output.
11
DFP LAMP
O
Outputs "H" only when FLAP IN (pin 67) is "L".Open when not used.
12
LCD DI
I/O
LCD DRV (LC75854W) data input.
13
LCD DO
O
Open when not used. LCD DRV (LC75854W) data output.
14
LCD CLO
O
LCD DRV (µIPD16432B) clock output. LCD DRV (LC75854W) clock output.
15
CD ACC CONT
O
Transmits the power on/off status of head unit to changer. Open when not used.
16
POWER MUTE
O
Muting output to power amp
17
ST-BY MUTE
O
Standby/muting output to power amp
18
POWER CONT
O
Unit power control output
19
CONT 1
O
LCD DRV power control 1
20
CONT 2
O
LCD DRV power control 2
21
GND
Ground for port
22
VDD
Power supply for port
23
MUTE
O
Audio muting output
24
BAND CONT
O
AM/FM power switching output. AM:"H", FM: "L".
25
RADIO CONT
O
Radio ON/OFF. Power switching output. Radio ON: "H".
26
RDS MODE
O
Outputs "H" during RDS AF operation. Open when not used.
27
IF REQ
O
Output to request IF count signal.
28
AM IF
I
AM IF count signal input
29
FM IF
I
FM IF count signal input
30
VDD
Power supply for PLL
31
FM OSC
I
FM local oscillation input
32
AM OSC
I
AM local oscillation input
33
GND
Ground for PLL
34
EO 0
O
Error output from charge pump (for FM)
35
EO 1
O
Error output from charge pump (for AM)
36
GND
Ground
LOC/DX switching output during radio seek (LOC: "H", DX: "L"). Open when not
37
LOC/DX
O
used.
38
ST IND/SD IN
I
Stop pulse input during FM/AM seek.
39
PHONE MUTE
I
Muting control input -20 dB. Mute: "L".
All manuals and user guides at all-guides.com
Description
19
Pin No.
Pin Name
I/O
40
MAIN M CONT
O
Main motor control output
41
SUB M CONT 1
O
Sub motor control output-1.
42
SUB M CONT 2
O
Sub motor control output-2.
43
MODE PL
I
Mode pulse input for tape mechanism.
44
REEL
I
Reel pulse input for tape mechanism.
45
STAND-BY
I
Mechanism Stand-by input
46
F/R HEAD
O
Head FWD/REV select output.
47
MS IN
I
MS signal input (no music: "H", with music: "L"). Pulled when not used
48
LED
O
Security LED flashing output ("H": 120-130 ns, 1 cycle: 3 s)
49
MI-1
50
MI-2
I
Diode matrix input for initial setting
51
MI-3
52
MO-1
53
MO-2
O
Diode matrix output for initial setting
54
MO-3
55
MO-4
56
BS CONT
O
MS/BL switching output. Open when not used
57
NR CONT
O
Dolby B NR on/off output. Open when not used
58
MTL CONT
O
Metal tape on/off output. Open when not used
59
BEEP
O
Beep output (3 kHz, 50 ms)
60
RMT IN
I
Remote control input. Pulled up when not used
61
E-VOL CE
O
CE output to electronic VR (LC75374E)
62
E-VOL DO
O
Data output to electronic VR (LC75374E)
63
E-VOL CLO
O
Clock output to electronic VR (LC75374E)
64
DSSA
O
Outputs "H" only when DSSA L/R are operating.
65
RDS DI
I
RDS data inputPulled down when not used.
66
DFP IN
I
Detects whether DFP (front panel) is provided or not.
67
FLAP IN
I
Detects whether flap DFP is open or closed.
68
RDS CLI
I
RDS clock inputPulled down when not used
69
EJECT IN
I
NC (pulled down)
70
ACC IN
I
ACC (accessory power supply) on/off input
71
RE1 IN
I
Rotary encoder input 1.
72
RE2 IN
I
Rotary encoder input 2.
73
PACK IN
I
Tape insertion status detection input
74
REG CPU
CPU power regulator
75
GND
Ground
76
X-OUT
System clock oscillator
77
X-IN
I
System clock oscillator
78
REG OSC
Regulator for oscillator circuit
79
VDD
Power supply
80
RESET
I
System reset input
Description
20

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