Circuit Description - Kenwood CD-423M-S Service Manual

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1. Main Microprocessor : uPD784214GF-533(IC6)
1-1 Microprocessor periphery block diagram
IC2
CXD2587Q
CLOCK
(DSP)
SQCO
SQCK
IC13
uPD780232GC
(DOT DRIVER)
TIMER_SW
TIMER PLAY
ON/OFF
SERIAL COMMUNICATION
TE
REMOCOM INPUT
L 13942296513
POWER KEY
DISC SENSOR ON/OFF
LASER ON/OFF
SPINDLE MOTOR ON/OFF
DOOR OPEN/CLOSE
PROTECTION
ANALOG MUTE
2. Key matrix
www
PORT
VOLTAGE RESISTER
2.9V
.
2.0V
1.2V
0.4V SHORT

CIRCUIT DESCRIPTION

IC6
35 CLOK
XLAT 36 XLAT
DATA 44 DATA
SCLK 33 SCLK
SENS 34 SENS
SYSM 45 MUTG
SCOR 46 SCOR
73 SQSI
75 SCK/SQCK
67 SCK_SW
CLK
SO 72 SI
SI 74 SO
STB 71 STB
uPD784214GF-533
49 SBUSY
50 SDATA
48 REM
47 POWER
60 JOG_2
JOG
59 JOG_1
23 PWM
32 LDC
26 MON
70 DOOR_SW
53 PROTECT
10 RMUTE
A/D 0(IC13,22pin)
x ao
y
5.1K RANDOM
i
3K DISPLAY
2K STOP
PLAY
CD-423M/423M-S/424M/DPF-J3030/J5030
8
S1_SW 56
S2_SW 28
S3_SW 27
D1_SW 58
D2_SW 57
R_CW 24
R_CCW 25
LOAD_SW 55
UNLOAD_SW 54
LOAD_P 31
LOAD_M 30
RESET 43
REG_ON 29
IC RESET 63
Q Q
3 6 7 1 3
84~91
(AD0~AD7)
76~83,92~98
(A0~A14)
RD 5
WR 6
CS 7
A/D 1(IC13,21pin)
u163
REPEAT
.
CONFIRM
DOWN
UP
2 9 9 4 2 8
CD MECHA
S1_SW
S2_SW
S3_SW
DISC_SW1
DISC_SW2
ROTARY+
ROTARY-
LOAD_SW
UNLOAD_SW
LOADM+
LOADM-
RESET INPUT
PERIPHERY IC ON
PERIPHERY IC RESET
1 5 0 5 8 2 9 9 4
IC9
W24258S-70LE
OE
WE
CS
m
co
9 9
2 8 9 9
(SRAM)
3