Sony Walkman D-EJ955 Service Manual page 23

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• IC801 T5AJ4-3HE0 (SYSTEM CONTROLLER)
Pin No. Pin Name
1 VSS
2 XIN
3 XOUT
4
TEST
5
VCPU
6
P21
7 BATVCC ON
8 RESET
9 FOK
10 NC
11
SCOR
12 GRSCOR
13 AMUTE
14
XSOE
15
XLAT
16 MSDTI
17 MSDTO
18 MSCK
TE
L 13942296513
19, 20 VCPU
21 AD CHGMNT
22 AD BATMNT
23 AD VCDKEY2
24 AD SEL
25
AD KEY
26 AD RMKEY
27 AD DCINMNT
28 CLOSE
PPG
29
30 BEEP
31 TSB
32 VCPU2
33 EXTBATT
34 TEXTSKIP
35 DIG TU
36 LOADING
37 XSTAND ON
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38 ESP
.
39 AVLS
40 HOLD
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I/O
— Ground terminal (digital system)
I System clock input from the CXD3029R (IC601)
O High frequency oscillator output terminal Not used (open)
I Test terminal for IC Not used (open)
— Power supply terminal
O Digital output LED control signal output "L": ON
O Power supply control signal output for battery charge "H": ON
System reset signal input from the power control (IC403) "L": reset
I
For several hundreds msec. after the power supply rises, "L" is input, then it changes to "H"
I
Focus OK signal input from the CXD3029R (IC601) "L": NG, "H": OK
I VDRAM input from the power control (IC403)
I Subcode sync (S0+S1) detection signal input from the CXD3029R (IC601)
I GRSCOR signal input from the CXD3029R (IC601)
O Analog muting on/off control signal output to the CXD3029R (IC601) "H": muting on
O Serial data output enable signal output to the CXD3029R (IC601)
O Serial data latch pulse signal output to the CXD3029R (IC601)
I Serial data input from the CXD3029R (IC601)
Serial data output to the power control (IC403), spindle motor driver (IC404) and CXD3029R
O
(IC601)
Serial data transfer clock signal output to the power control (IC403), spindle motor driver (IC404)
O
and CXD3029R (IC601)
— Power supply terminal
I
Battery charge voltage detection signal input from the power control (IC403)
I Battery voltage detection signal input and rechargeable battery use/no use detection signal input
I Key input terminal Not used (fixed at "H")
I Plug-in detection signal input of LINE OUT (OPTICAL)
Key input terminal (A/D input) x/CHARGE, > N, ., VOL +/– (S805 to S809) keys
I
input
I Key input from the headphone with remote commander (A/D input)
DC input voltage detection signal input (A/D input) and DC input jack use/no use detection signal
I
input
CD lid open/close detection switch (S804) input terminal "L": CD lid open, "H": CD lid close
I
The stop status is reset with the falling edge of input signal
O VCC2 voltage control signal output "H": ON
O Beep sound output to the headphone amplifier (IC301)
I/O Communication two-way data bus with the headphone with remote commander
— Power supply terminal Not used (open)
I External battery detection signal input
I Not used (open)
I Not used (open)
I Not used (open)
I Charge stand detection signal input
G•PROTECTION switch (S803) input terminal
I
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"L": G•PROTECTION 1, "H": G•PROTECTION 2
y
AVLS (Automatic Volume Limiter System) switch (S802) input terminal
i
I
"L": normal, "H": limit
I HOLD switch (S801) input terminal
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2 9
8
Description
Q Q
3 6 7 1 3 1 5
co
.
"L": hold off, "H": hold on
D-EJ995
9 4 2 8
0 5 8 2 9 9 4 2 8
m
9 9
9 9
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