Sony HCD-MD555, Руководство по обслуживанию

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— 119 —
Pin No.
76
77
78
79
80
81
82
83
84 to 86
87
88
89, 90
91
92
93 to 95
96
97
98
99
100
I/O
O
O
I
I
I
I
I
O
I
O
I/O
I
I
I
I
—
I
I
—
I
Description
Not used in this set (open)
Reset signal output to CXD2654AR (IC121) and BH6511FS (IC152). “L”: reset
Internal status (SENSE) input from CXD2654AR (IC121)
Monitor signal input from CXD2654AR (IC121)
Busy signal input from CXD2654AR (IC121)
Tracking jump detection signal input from CXD2654AR (IC121)
Focus OK signal input from CXD2654AR (IC121). “H” is input when the focus is on (“L”: NG)
Sensor switch signal output
Disc detection signal input
Clock signal output to the non-volatile memory (IC171)
Bi-directional data bus to the non-volatile memory (IC171)
Disc detection signal input
Input from the over-write head DOWN position detector switch (S7).
“L” is input when the over-write head is at the DOWN position
Input from the over-write head UP position detector switch (S6).
“L” is input when the over-write head is at the UP position
Key input terminal
Ground terminal
Key input
Reference voltage (+3.3 V) input terminal
Power supply terminal (+3.3 V)
Data input from the MD WALKMAN
Pin Name
—
DIG RST
SENS
MNT3
MNT2
MNT1
MNT0
SENSOR SW
DISC5,DISC1
DISK2
SCL
SDA
DISK4,DISC3
HEADSW-
DOWN
HEADSW-UP
KEY3 to KEY1
AVSS
KEY0
VREF
3.3V
WMIN
*1 Overwrite head UP/DOWN motor (M905) control
UP DOWN BRAKE SLIP RUN
Operation
Terminal
HEAD UP (
$™
pin) “H” “L” “H” “L”
HEAD DOWN (
$¡
pin) “L” “H” “H” “L”