RXD-501/551/571/A5/701/751/771/A8
12
CIRCUIT DESCRIPTION
Pin No.
Name
I/O
Description
1
–
I
+5V
2
–
I
N. C.
3
DPSS
I
DECK DPSS DETECTION
H = MUSIC
L = NO MUSIC
4
A-PLAY
I
A DECK PLAY SW
H = NOT PLAY
L = PLAY
5
A-PACK
I
A DECK PACK DETECTION
H = PACK OUT
L = PACK IN
6
–
I
GND
7
CD CLK
I
CD CLOCK INPUT
8
GND
I
GND
9
–
I
+ 5V
10
B-PACK
I
B DECK PACK DETECTION
H = PACK OUT
L = PACK IN
11
B-PLAY
I
B DECK PLAY SW
H = NOT PLAY
L = PLAY
12
R REC
I
REVERSE REC DETECTION
H = REC PROHIBITION
L = REC PERMITTED
13
PS IN
I
PS IN
14
F REC
I
FORWARD REC DETECTION
H = REC PROHIBITION
L = REC PERMITTED
15
PS LOAD
I
PS LOAD
16
Vcc
I
+5V
6. Input expander IC (parallel-serial)
• X28, IC6 (TC74HC166AP)
7. Key matrix
FL driver u-COM (uPD780204-038)
• X14, IC1
VOLTAGE (V)
AD0 (33pin)
AD1 (32pin)
AD2 (31pin)
AD3 (30pin)
0 ~ 0. 82
POWER
EX. BASS
CD PGM
TUNING UP
0. 84 ~ 1. 64
–
–
DUBBING
TUNING DOWN
1. 66 ~ 2. 52
–
DISPLAY
SRS
BAND
2. 54 ~ 3. 38
–
INPUT
SOUND
AUTO
3. 40 ~ 4. 18
–
MODE / DEMO
SET
ENTER
4. 20 ~ 4. 78
–
TIMER
–
–
VOLTAGE (V)
AD4 (29pin)
AD5 (28pin)
AD6 (27pin)
0 ~ 0. 82
CD
4
A / B
DOLBY NR
0. 84 ~ 1. 64
CD
¢
TAPE
¡
REV MODE
1. 66 ~ 2. 52
CD
7
TAPE
£
DISC 1
2. 54 ~ 3. 38
CD
6
TAPE
7
DISC SKIP
3. 40 ~ 4. 18
CD
0
TAPE
™
DISC 2
4. 20 ~ 4. 78
TAPE
¶
TAPE
1
DISC 3
RXD-501~751(K)
COVER(
98.4.23
21:43
y [ W
23