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Circuit Boards Location - Aiwa CDC-R937 Service Manual

Fm/mw/lw compact disc player
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Pin No.
Pin Name
I/O
57
POWER CONT
O
Power control signal output
58
RDS DI
I
CDC-R937: RDS serial data signal input CDC-X937: Not used. (Open)
59
BEEP
O
Beep signal output
60
MUTE
O
Audio mute control signal output
61
LED
O
LED on/off control signal output (for CD window LED)
62, 63
NC
O
Not used. (Open)
64
RDS MODE
O
RDS mode signal output "H": RDS AF
65
POWER MUTE
O
Mute control signal output to power IC
66
FM BAND
O
Band (FM) select signal output
67
AM BAND
O
Band (AM) select signal output
68
NC
O
Not used. (Open)
69
ILLUM CONT 1
O
Panel illumination color change over signal output "H": Blue, "L": Red
70
ILLUM CONT 2
O
Panel illumination color change over signal output "H": Red, "L": Blue
71
MI-1
I
Diode matrix input for initial setting
72
MI-2
I
Diode matrix input for initial setting
73
MI-3
I
Diode matrix input for initial setting Not used. (Open)
74
MO-1
O
Diode matrix output for initial setting Not used. (Open)
75
MO-2
O
Diode matrix output for initial setting
76
MO-3
O
Diode matrix output for initial setting
77
MO-4
O
Diode matrix output for initial setting
78
AUX SW
I
AUX detection signal input
79
CDS SREQ
I
CDS S-REQ signal input
80
LAMP CONT
O
Lamp control signal output
81
TEST CD
O
Not used. (Open)
82
GND1
—
Ground pin
83
TEST MF
O
Not used. (Open)
84, 85
PANCON 1, 2
O
Panel open/close control signal output
86
SW1
I
Disc detection switch 1 signal input
87
SW2
I
Disc detection switch 2 signal input
88
SW3
I
Not used. (Open)
89
PANEL SW
I
M-FLAP DFP open/close control signal input
90
MF CONT
O
Power supply control signal output for panel operation
91
SEN 1
I
Position detection (photo sens) signal input for panel open/close
92
SEN 2
I
Position detection (lilit sw) signal input for panel open/close
93
LMT SW
O
Not used. (Open)
94
CDS RESET
O
CDS reset signal output
95
CDS SLEEP
O
CDS sleep signal output
96
CDS CS
O
CDS CS signal output
97
(CDS STOP)
O
Not used. (Open)
98
RADIO CONT
O
Radio control signal output
99
VDD PORT
—
Power supply pin (+5 V)
100
GND PORT
—
Ground pin
Pin Description
19

4-2. CIRCUIT BOARDS LOCATION

SUB board
SENSOR board
INDICATOR board
LED board
KEY board
19
CDC-R937/X937
SERVO board
tuner unit
(TU101)
MAIN board
AUX board
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