Service manual

75
Pin No. Pin Name I/O Description
42 HEADUP O
Over write head up/down motor control signal output terminal
“H” active Not used (open)
43 JOG0
I Jog dial pulse input terminal (A phase input) Not used (open)
44 JOG1
I Jog dial pulse input terminal (B phase input) Not used (open)
45 WMINV O
Clock signal phase inversion control signal output to the equipment connected to other unit
Not used (open)
46 LEDLAT O
Serial data latch pulse output to the LED driver “L” active Not used (pull down)
47 OPTSEL1
O Selection signal output terminal for digital signal Not used (open)
48 DARST
O Reset signal output terminal “L”: reset Not used (open)
49 MUTE
O
Audio line muting control signal output terminal “L”: line muting on
Not used (open)
50 STB
O
Power control strobe signal output for the external device
“L”: standby mode, “H”: power on Not used (open)
51 CHACK-IN I
Detection input from the disc loading in detect switch (S573)
“L”: disc chucking, others: “H” Not used
52 HOME I
Detection input from the elevator home position detect switch
“L”: home position, others: “H” Not used (fixed at “L”)
53 PACK-OUT I
Detection input from the disc loading out detect switch (S602)
“L”: loading out position, others: “H”
54 LDIN
O
Mini-disc loading motor control signal output to the motor driver (IC153)
“H” active *1
55 LDOUT
O
Mini-disc loading motor control signal output to the motor driver (IC153)
“H” active *1
56 LD-LOW
I
The loading motor drive voltage control signal output to the motor driver (IC153)
“H” active Not used (open)
57 LDON O
Laser diode on/off control signal output to the automatic power control circuit “H”: laser on
58 REFLECT I
Detection input from the disc reflection rate detect switch (S102-1)
“L”: high reflection rate disc, “H”: low reflection rate disc
59 PROTECT I
Rec-proof claw detect input from the protect detect switch (S102-2) “H”: write protect
60 PB-P
I
Detection input from the playback position detect switch (S604) “L” active
61 REC/PB
O Not used (open)
62 3.3V
— Power supply terminal (+3.3V)
63 LIMIT-IN
I
Detection input from the sled limit-in detect switch (S101)
The optical pick-up is inner position when “L”
64 GND
— Ground terminal
Laser modulation select signal output to the HF module switch circuit
Playback power: “H”, Stop: “L”,
Recording power:
65 MOD
O
2 sec
0.5 sec
*1 Mini-disc loading motor (M903) control
Loading Eject Stop Brake
LDIN (pin tf)
“H”“L”“L”“H”
LDOUT (pin tg)
“L”“H”“L”“H”
Terminal
Mode