Kenwood RXD-790 Service Manual page 11

7-2 Expander IC port description
7-2-1 Display section NJU7314(X14 : IC5)
Pin No. Name
1 SRS_LED
2 3ST_LED
3 PRO_LED
4 H.TAP
5 VSS
6 DC_OFF
7 DOLBY
8 SP RELAY
9 CS RELAY
10 SO
11 DATA
12 CLK
13 STB
14 CLR
15 VSS
16 EMPHASIS
17 ECHO A
18 ECHO B
19 POWER
20 VDD
7-2-2 DECK section NJU7314(X28:IC6)
Pin No. Name
1 BEAT-C
2 R/P
3 RMUTE
4 A/B
5 VSS
6 BIAS
7 NR
8 D-R/P
9 LMUTE
10 SO
11 DATA
12 CLK
13 STB
14 CLR
15 VSS
16 A-SOL
17 A-CPM
18 B-SOL
19 B-CPM
20 VDD
CIRCUIT DESCRIPTION
I/O
O SRS LED
O 3STEREO LED
O PRO LOGIC LED
O HIGH TAP control
GND
O CD DSP power supply
O DOLBY ON/OFF (LOW TAP)
O SP relay control
O CS SP relay control
O Shift resister data output
I Data input
I Lock
I Strobe
I Data clear
GND
O FM emphasis changeover
O ECHO Control
O ECHO Control
O Power supply control
Power supply (5V)
I/O
O Beat cancel
O REC/PLAY changeover
O REC MUTE
O A/B play changeover
GND
O BIAS changeover
O Noise redaction changeover (DOLBY)
O Dolby REC/PLAY changeover
O LINE MUTE
O Shift resister data output
I Data input
I Clock
I Strobe
I Data clear
GND
O A deck solenoid control
O A deck motor control
O B deck solenoid control
O B deck motor control
Power supply(5V)
RXD-790/V860/V890
Description
H=ON
H=ON
H=ON
H=ON
H=OFF
H=ON
H=ON
H=ON
H=100k
H=ON
H=ON
H=ON
Description
H=ON
H=REC
H=OFF
H=B
H=ON
H=ON
H=REC
H=OFF
H=ON
H=ON
H=ON
H=ON
L=OFF
L=OFF
L=OFF
L=OFF
L=ON
L=OFF
L=OFF
L=OFF
L=50kHz
L=OFF
L=OFF
L=OFF
L=OFF
L=PLAY
L=ON
L=A
L=OFF
L=OFF
L=PLAY
L=ON
L=OFF
L=OFF
L=OFF
L=OFF
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