Sony CDX-705 Service Manual page 45

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4-6. IC PIN FUNCTION DESCRIPTION
MAIN BOARD IC302 CXP84124-066Q (SYSTEM CONTROLLER)
Pin No. Pin Name
1 LIM.SW
2 BUSON
3 EJECT
4 LOAD 1
5 LOAD 2
6 A.MUTE
7 EMPH
8 CH.R
9 CH.F
10 —
11 ELV.R
12 ELV.ON
13 CD RST
14 CD ON
15 GBON
16 EEON
TE
L 13942296513
17-23 —
24 TEST1
25-29 —
30 RESET
31 EXTAL
32 XTAL
33 VSS
34 TX
35 TEX
36 AVSS
37 AVREF
38 ATRIBT
39 MCK
40 EHS
41 HTMP
42 —
43 MODE1
44 MODE2
45 MODE3
46, 47 —
48 SCK
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49 SI
50 SO
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I/O
I Input of limit switch
I Input of Bus on control signal from SONY bus interface (IC204)
I Input of EJECT key (SW303)
I Input of LOAD OUT switch
I Input of LOAD IN switch
O Output of audio output mute on/off control signal
O Output of emphasis mode for disc playing
O
Output of control signal to
the chucking motor drive (IC52)
O
— Not used
O Output of control signal to elevator motor drive (IC301)
O Output of mechanical deck power supply control signal
O Servo system resetting
O Output of servo power supply control signal
— Not used
— Not used
— Not used
Automatic adjustment selection "L": Automatic adjustment "H": Manual adjustment (Solder across
I
the BP302 terminal)
— Not used
I Input of system reset signal
I Input of system clock (8 MHz)
O Output of system clock (8 MHz)
— Ground pin
— Not used
I Connected to ground
— Ground pin of A/D converter
I Input of A/D converter reference voltage
I Selection of custom file, D-BASS, etc.
I Input of signal for fine adjustment of elevator position
I Input of elevator position (RV302)
— Not used
— Not used
O Output of D-BASS control signal
O Output of D-BASS control signal
O Output of D-BASS control signal Not used
— Not used
O Output of serial clock signal from SONY bus interface (IC204)
I Input of serial data signal from SONY bus interface (IC204)
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O Output of serial data signal to SONY bus interface (IC204)
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2 9
8
Function
"H": Eject on
"H": Mute on
"L": on
FWD
CH.R L
CH.F H
"H": on
Q Q
3 6 7 1 3 1 5
"L": Reset
co
.
– 33 –
9 4 2 8
"H": Bus on
Forward : Load chucking
REV Brake
Reverse : Save
H H
L H
"H": on
0 5 8 2 9 9 4 2 8
m
9 9
9 9