Sony HMC-MD777 Service Manual page 80

Pin No. Pin Name
37 SCLK
38 OPTSEL0
39 SENSOR
40 SENSOR2
41 HEADDOWN
42 HEADUP
43 JOG0
44 JOG1
45 WMINV
46 LEDLAT
47 OPTSEL1
48 DARST
49 MUTE
50 STB
51 CHACK-IN
52 HOME
53 PACK-OUT
54 LDIN
55 LDOUT
56 LD-LOW
57 LDON
58 REFLECT
59 PROTECT
60 PB-P
61 REC/PB
62 +3.3V
63 LIMIT-IN
64 GND
*2 Over write head up/down motor (M4) control
Mode
Head
Up
Terminal
HEADUP (pin $™)
"H"
HEADDOWN (pin $¡)
"L"
I/O
O
Serial clock signal output to the CXD2654R (IC121)
O Selection signal output for the optical input signal Not used (open)
I
Elevator position detect sensor (PH570) input terminal
I
Elevator position detect sensor (PH571) input terminal
Over write head up/down motor control signal output to the motor driver IC (IC172)
O
"H" active *2
Over write head up/down motor control signal output to the motor driver IC (IC172)
O
"H" active *2
I Jog dial pulse input from the rotary encoder (S801 ≠ C c ±) (A phase input)
I Jog dial pulse input from the rotary encoder (S801 ≠ C c ±) (B phase input)
Clock signal phase inversion control signal output to the equipment connected to MD
O
WALKMAN LINK jack (J1)
O
Serial data latch pulse output to the LED driver IC (IC802) "L" active
CS/BS optical digital in signal or CD digital playback signal selection output to the digital input
O
selector (IC405) "L": CS/BS optical digital in signal, "H": CD digital playback signal
O Reset signal output terminal "L": reset
Audio line muting control signal output terminal "L": line muting on
O
Not used (pull down)
Power control strobe signal output for the external device
O
"L": standby mode, "H": power on Not used
Detection input from the disc loading in detect switch (S573)
I
"L": disc chucking, others: "H"
Detection input from the elevator home position detect switch (S570)
I
"L": home position, others: "H"
Detection input from the disc loading out detect switch (S572)
I
"L": loading out position, others: "H"
Mini-disc loading motor control signal output to the motor driver IC (IC550)
O
"H" active *3
Mini-disc loading motor control signal output to the motor driver IC (IC550)
O
"H" active *3
I Control signal output for the loading motor drive voltage "H" active Not used (open)
O
Laser diode on/off control signal output to the automatic power control circuit "H": laser on
Detection input from the disc reflection rate detect switch (S682)
I
"L": high reflection rate disc, "H": low reflection rate disc
I
Rec-proof claw detect input from the protect detect switch (S683) "H": write protect
Detection input from the playback position detect switch "L" active Not used (open)
I
O Not used (open)
— Power supply terminal (+3.3V)
Detection input from the sled limit-in detect switch (S681)
I
The optical pick-up is inner position when "L"
— Ground terminal
Head
Stop Brake
Down
"L" "L" "H"
"H" "L" "H"
Function
*3 Mini-disc loading motor (M572) control
Mode
Terminal
LDIN (pin %¢)
LDOUT (pin %∞)
– 110 –
Loading Eject Stop
"H" "L" "L"
"L" "H" "L"
Brake
"H"
"H"