Sony HCD-MD1EX - System Service Manual page 69

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