Kenwood RXD-790 Service Manual page 12

RXD-790/V860/V890
7-2-3 CD section (RXD-V860/V890) NJU7313D (X32 : IC9)
Pin No. Name
1 BRKM
2 LMF
3 RMR
4 LMR
5 VSS
6 RMF
7 CD MUTE
8 MANU/AUTO
9 CD _RST
10 DATA
11 CLK
12 STB
13 CLR
14 LDC
15 PMON
16 VMUTE
17 PAL/NTSC
18 VDD
7-2-4 CD Section (RXD-V860/V890)
Input expander IC (parallel-serial) TC74HC166(X32 : IC6,7)
• IC 6
Pin No. Name
2 UNLOAD
3 LDSW
4 NC
5 MUTE
10 +3.3C
11 UPSW
12 DNSW
14 LMTSW
•IC 7
Pin No. Name
2 EMPHASIS
3 DPSS
4 NC
5 NC
10 PAL/NTSC
11 PSSW
12 STSW
14 NC
CD section (RXD-790) : refer to RXD-500/700 service manual (B51-5300-00) on page11.
12
CIRCUIT DESCRIPTION
I/O
O Rotary motor control brake
O Loading motor control(CW)
O Rotary motor control(CCW)
O Loading motor control (CCW)
GND
O Rotary motor control (CW)
O CD analog mute
O TV changeover control
O CS DSP reset control
I Data input
I Clock
I Strobe
I Data clear
O CD LD control
O PMON control
O Visual mute control
O PAL/NTSC changeover
Power supply(5V)
I/O
I CD unloading sw
I CD loading sw
I GND
I CD zero mute detect
I VCD power supply detect
I CD up sw
I CD down sw
I CD limit sw
I/O
I VCD emphasis
I DECK non music (black) cletect
I GND
I GND
I VCD board visual mode
I CDM-27 MECHA position sw
I CDM-27 MECHA stop sw
I GND
Description
H=BRAKE
H=ON
H=ON
H=ON
H=ON
H=OFF
H=MANUAL
H=NORMAL
H=OFF
H=ON
H=ON
H=PAL
Description
H=ON
H=OFF
H=MUTE OFF
H=3.3V OFF
H=OFF
H=OFF
H=OFF
Description
H=EMPHA ON
H=MUSIC
H=PAL
H=OFF
H=OFF
L=NORMAL
L=OFF
L=OFF
L=OFF
L=OFF
L=ON
L=AUTO
L=RESET
L=ON
L=OFF
L=OFF
L=NTSC
L=OFF
L=ON
L=MUTE ON
L=3.3V ON
L=ON
L=ON
L=ON
L=OFF
L=NON MUSIC
L=NTSC
L=ON
L=ON