Kenwood RXD-V323 Service Manual page 7

4. MPEG Microprocessor : LC867240(CD PCB,IC03)
4-1. Pin description
Pin.No. Name
1 N/P SEL OUT
2 RESET OUT
3 DI
4 DO
5 CL
6 DATA OUT
7 DATA IN
8 SCK
9 STB IN
10 BUSY OUT
11 MIRQ
12 RESET
13,14 VSS
15 VSS
16,17 CF1/CF2
18 VDD
19~29 VSS
30 VIDEO LED
31 PBC
32~37 -
38 VDD CONTROL
39~55 N/C
56 VDD
57 VSS
58~61 -
62 CE
63 CL
64 DO
65 -
66 DI
67~73 -
74 SL +
75 SL -
76 SPEED B
77 SPEED A
78 AUDIO MUTE
79 MUTE
80 PIC LIMIT SW
81~86 -
87 CL
88 DAT
89 VSS
90 VDD
91 SQ OUT
92 RWC
93 RES
94 DRF
95,96 N/C
97 CE
98 VOC
99 CS
100 RESET OUT
5. Key matrix
PORT SW1
Pin 19 Power
(K1)
Pin 20 Band
(K2)
Pin 21 CD Play
(K3) Pause
CIRCUIT DESCRIPTION
I/O
- No used.
O LC74202E(IC08),LC74772V(IC07) reset out.
I LC74772V(IC07) SIN.
O No used.
I LC74772V(IC07) clock.
O Main CPU(IC601) interface data out.
I Main CPU(IC601) interface data in.
I Main CPU(IC601) interface clock.
I Main CPU(IC601) interface STB in.
O Main CPU(IC601) interface STB out.
I LC74202E(IC08) IRQ.
I Reset input.
- VSS
- VSS
- Xtal 6.0MHz.
- Power supply(+5.0V).
- VSS
O LED(VIDEO CD) control.
- Playback control.
- No used.
O No used.
- No used.
- Power supply(+5.0V).
- VSS
- No used.
O LC74202E(IC08) CE.
O LC74202E(IC08) CL.
I/O LC74202E(IC08) DO.
- No used.
I/O LC74202E(IC08) DI.
- No used.
O Sled motor control(+).
O Sled motor control(-).
O Speed control terminal to IC01(LA9241).
O Speed control terminal to IC01(LA9241).
O Audio muting control.
O BA5936S(IC04) muting control.
I Input port of pick up limit switch.
- VSS
O Command clock output to LC78630E(IC02) and LA9241(IC01).
O Command output to LC78630E(IC02) and LA9241(IC01).
- VSS
- Power supply(+5.0V).
I Sub code Q input from LC78630E(IC02).
O LC78630E(IC02) RWC,LA9241(IC01) CE.
O Chip reset output to LC78630E(IC02).
I DRF from LA9241(IC01).
- No used.
- No used.
- No used.
O CS to LC74772V(IC07).
- No used.
SW2 SW3 SW4 SW5 SW6
Input EX Bass Display Menu Select Enter
/Demo
Tuning Tape A/B Play Stop
Mode Rec
Stop Disc Disc 3 Disc2 Disc 1 Open
Skip
Description
SW7 SW8
FF REW
Close
RXD-V323
Active
H L
O
O
O
O
O
O
On Off
CD Other
O
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