![background image](http://html.mh-extra.com/html/sony/hcd-md1ex-system/hcd-md1ex-system_service-manual_420809069.webp)
– 91 –
Pin No.
Pin Name
I/O
Function
41
SENS
I
Internal status (SENSE) input from the CXD2652AR (IC121)
42
SCTX
O
Recording data output enable signal output to the CXD2652AR (IC121) and overwrite head
driver (IC181) Writing data transmission timing output (Also serves as the magnetic head
on/off output)
43
XINT
O
Not used (pull down)
44
WRPWR
O
Laser power select signal output to the CXD2652AR (IC121) and HF module switch circuit
“L”: playback mode, “H”: recording mode
45
MNT3
I
Spindle servo lock status monitor signal input from the CXD2652AR (IC121)
46
MNT2
I
Busy signal input from the CXD2652AR (IC121)
47
MNT1
I
Track jump detection signal input from the CXD2652AR (IC121)
48
MNT0
I
Focus OK signal input from the CXD2652AR (IC121)
“H” is input when focus is on (“L”: NG)
49
LDON
O
Laser diode on/off control signal output to the automatic power control circuit “H”: laser on
Laser modulation select signal output to the HF module switch circuit
Playback power: “H”, Stop: “L”,
Recording power:
50
MOD
O
51
LDIN
O
Motor control signal output to the loading motor driver (IC153) “L” active *1
52
LDOUT
O
Motor control signal output to the loading motor driver (IC153) “L” active *1
53
LD-LOW
O
Loading motor drive voltage control signal output for the loading motor driver (IC153)
“H” active
54
PROTECT
I
Rec-proof claw detect input from the protect detect switch (S683) “H”: write protect
55
REFLECT
I
Detection input from the disc reflection rate detect switch (S682)
“L”: high reflection rate disc, “H”: low reflection rate disc
56
PACK-IN
I
Detection input from the disc detect switch Not used (fixed at “H”)
57
PACK-OUT
I
Detection input from the loading-out detect switch (S686)
“L” at a load-out position, others: “H”
58
CHUCK-IN
I
Detection input from the disc chucking-in detect switch (S685) “L”: chucking
59
LIMIT-IN
I
Detection input from the sled limit-in detect switch (S681)
The optical pick-up is inner position when “L”
60
REC-P
I
Detection input from the recording position detect switch (S688) “L” active
61
PB-P
I
Detection input from the playback position detect switch (S687) “L” active
62
+3.3V
—
Power supply terminal (+3.3V)
63
—
I
Not used (fixed at “L”)
64
GND
—
Ground terminal
65 to 78
—
I
Not used (fixed at “L”)
79
SDA
I/O
Two-way data bus with the EEPROM (IC171)
80
SCL
O
Serial clock signal output to the EEPROM (IC171)
2 sec
0.5 sec
*1 Loading motor (M903) control
Mode
Terminal
LDIN (pin
%¡
)
“L”
“H”
“L”
“H”
LDOUT (pin
%™
)
“H”
“L”
“L”
“H”
LOADING
EJECT
BRAKE
RUN IDLE
Summary of Contents for HCD-MD1EX - System
Page 2: ... 2 ...
Page 11: ... 11 This section is extracted from instruction manual ...
Page 93: ...115 HCD MD1EX MEMO ...