TUNER board
TUNER RETAINER board
HEADPHONE board
BATTERY board
BATTERY COMMON board
PRIMARY board
SECONDARY board
CONTROL board
MAIN board
CD MOTOR board
– 15 –
– 16 –
6-2. CIRCUIT BOARDS LOCATION
6-1. IC PIN DESCRIPTION
• IC501 CXP83620-007Q (SYSTEM CONTROL)
Pin No.
Pin Name
I/O
Pin Description
1
C-SCOR
I
CD SCOR input
2
RMC
I
Sircs receiver input
3, 4
NC
—
Not used.
5
C-SENS1
I
CD SENSE-1 input
6
C-SENS2
I
CD SENSE-2 input
7
C-SQCK
O
CD Sub-Q read clock output
8
C-SQSO
I
CD Sub-Q data input
9
C-RST
O
CD reset output
10
C-CLOCK
O
CD serial clock output
11
C-LATCH
O
CD serial latch output
12
C-DATA
O
CD serial data output
13
REC
I
Tape record signal input L: REC
14
R-COUNT
I
Tuner PLL data input
15
R-DATA
O
Tuner PLL data output
16
R-CLOCK
O
Tuner PLL clock output
17
R-LATCH
O
Tuner PLL latch output
18
V-LATCH
O
Volume latch output
19
V-DATA
O
Volume data output
20
V-CLOCK
O
Volume clock output
21
P-CON
O
System power control output
22
DIRECTION
—
Not used.
23 – 25
KEY-1 – 3
I
Key input
26
NC
—
Not used.
27
INIT
O
Initial set signal output
28
MODE CHECK
I
Mode set pin
29
SHIFT CLOCK
O
Shift clock output
30
RST
I
System reset input
31
EXTAL
I
Oscillation input (4.19 MHz)
32
XTAL
O
Oscillation output (4.19 MHz)
33
VSS
—
GND
34
VL
O
LCD drive port ON/OFF output
35 – 37
VLC-3 – 1
O
LCD drive voltage terminal
O
LCD drive common output
O
LCD drive segment output
—
Not used.
O
Audio mute output H: Mute
O
Tuner block mute output H: Mute
O
CD block mute output H: Mute
O
Tape function output H: Tape
O
Tuner function output H: Radio
O
CD function output L: CD
—
Power supply pin (+5 V)
73
TX
O
Oscillation output (32.768 kHz)
74
TEX
I
Oscillation input (32.768 kHz)
75
NC
—
Not used.
76
ISS1
O
Not used.
77
ISS2
O
Not used.
78
C-DOOR
I
CD door open/close switch input L: Close
79
TC-PLAY
I
Tape play switch input L: Tape
80
REG CHK
I
Regulator check signal input H: ON
SECTION 6
DIAGRAMS
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
