RXD-652/702/752/772S/852/A81/A601/A701
7
CIRCUIT DESCRIPTION
X28(IC1)
CD MECHA
DECK PLAY/REC EQ IC
DECK MECHA
X14(IC51)
X13(IC1)
X13(IC2)
DOT DRIVER
AUDIO CONTROL IC
X14(IC52,53)
X13(A1:IC2)
MAIN U-COM
LED DRIVER x 2
PLL IC
M30622MC–526FP
X13(IC7)
X28(IC4)
DSP/DAC IC
EXPANDER IC
X13(IC10)
X13(IC3)
X13(IC14)
DOLBY PROLOGIC IC
DECK PORT DRIVER
4-2 VOLTAGE KEY MATRIX
INPUT VOLTAGE
KEY1
KEY2
KEY3
(V)
(HEX)
Pin97
Pin95
Pin94
0.00~0.26
00H~0DH
DISC SKIP
BAND
TUNING
0.27~0.81
0EH~29H
DISC2
EX. BASS (SW)
DISP./DEMO
0.82~1.37
2AH~46H
CD STOP
ENTER
INPUT
1.38~1.94
47H~63H
OPEN/CLOSE
RWD
SELECT
1.95~2.51
64H~80H
A/B
FF
RVS. MODE
2.52~3.07
81H~9DH
FWD PLAY
PLAY/PAUSE
TAPE STOP
3.08~3.62
9EH~B9H
RVS PLAY
DISC1
REC
3.63~4.16
BA~D5H
DOLBY(T.EQ.)
POWER
DISC3
4.17~4.73
D5~F2H
NO KEY
MENU
BACK
4.74~5.00
F3H~FFH
KEY OFF
KEY OFF
KEY OFF
4. Main microprocessor M30622MC-526FP (X13:IC1)
4-1 Microprocessor periphery block diagram
RXD-652(K)
INT
1P
99.6.9
8:02
PM
y [ W 14