Circuit Description - Kenwood CD-206 Service Manual

1. Microprocessor : uPD78055GC-A03 (X32, IC3)
1-1 Microprocessor periphery block diagram
X32, IC2
CXD2507AQ CLK
(DSP) XLT
DATA
SENS
FOK
SCOR
SQSO
GFS
SQCK
MON
MUTE
X32, IC6
LC89710M SCLK
(CD TEXT) SRDT
DQSY
CDM25
MECHA SW
LOADING
DRIVER
ROTARY
DRIVER
LASER ON / OFF
ANALOG METE
X25, IC1
FIP15
LC75710
XM1BA
(DOT DRIVER)
(FL)
KEY TABLE
PORT
A/D KEY0 (77PIN) A/D KEY1 (78PIN)
(V)
4.9 ~ 4.4 UP
4.4 ~ 3.8 DOWN
3.8 ~ 3.2 FF
3.2 ~ 2.5 FB
2.5 ~ 1.9 EDIT
1.9 ~ 1.3 DISC SKIP
1.3 ~ 0.6 –
0.6 ~ 0.2 –

CIRCUIT DESCRIPTION

X32, IC3
53 CLK
54 LAT
55 DATA
56 SENSE
51 FOK
62 SCOR
16 SUBQ
58 GFS
18 SQCK
52 MON
57 MUTEG
10 SCLK
8 SRDT
63 DQSY
uPD78055GC-A03
36 OPEN_SW
37 CLOSE_SW
38 UP_SW
39 DOWN_SW
49 DISC_SENS
48 POSI_SENS
44 SLT_SW
34 OPENM
35 CLOSEM
45 R_TRAY_S
46 R_TRAY_R
47 R_TRAY_L
50 LDC
59 RMUTE
12 DATA
13 CLK
14 CE
77 A/D KEY0
78 A/D KEY1
79 A/D KEY2
A/D KEY2 (79PIN)
DISC1 TEXT DISPLAY
DISC2 ALL INFO.
DISC3 P. MODE
DISC4 TIME DISPLAY
DISC5 RANDOM
OPEN/CLOSE REPEAT
PLAY/PAUSE –
STOP –
CD-206/DPF-R6010/R6010E
19~26
(AD0~AD7)
27~32
(A8~A13)
RD 40
WR 41
WAIT 42
ASTB 43
DEFECT 73
SGATE 64
SCK 65
SDATE 66
67,80,1~3
LED1~5
REM 61
8/16bit 15
SDATA 5
SBUSY 6
RESET 60
X32, IC4, IC5
HM62256
BLFP 8T
(SRAM)
OR
W242575-70LL
/TC74HC373AF
(D-LATCH)
OE
WE
CE
LE
DEFECT NG
X32, IC7
SGATE
SCK
SDATA
KAN03
LED1 ~ 5
REMOCON
8bit/16bit
SERIAL
COMMUNICATION
RESET
3