Sony PMC-MD55 Service Manual page 185

• DG BOARD IC601 RU8X12MF-0031 (MD MECHANISM CONTROLLER)
Pin No. Pin Name
1, 2 DAOUT0, DAOUT1
3 to5 KEY0 to KEY2
6 CHACK-IN
7 PACK-IN
8 PACK-OUT
9, 10 NC
11 AVSS
12 XINT
13 PDOWN
14 NC
15 SQSY
16 DQSY
17 to 19 NC
20 SYS-RST
21 TEST
22 +3.3V
23 VBAT
24 XOUT-T
25 XIN-T
26 GND
27 XOUT
28 XIN
29 EXMEM
30 S1
31 NC
32 SENS
33 SHOCK
34 to 35 NC
36 STB
37 REC P
38 PB P
39 LD-LOW
40 NC
41 MNT2 (XBUSY)
42 MNT3 (SLOCK)
43
LED0
44 to 45 NC
46 RST-LOW
47 GND
I/O
O Not used (open)
I Key input terminal (A/D input) Not used (fixed at "H")
Detection input from the disc chucking-in detect switch
I
Not used (fixed at "H")
Detection input from the loading-in detect switch
I
"L" at a load-out position, others: "H" Not used (fixed at "H")
Detection input from the loading-out detect switch (S602)
I
"L" at a load-out position, others: "H"
— Not used (fixed at "L")
— Ground terminal
I Interrupt status input from the CXD2654R (IC121)
I Power down detection signal input terminal "L": power down, normally: "H"
— Not used (fixed at "L")
Subcode Q sync (SCOR) input from the CXD2654R (IC121)
I
"L" is input every 13.3 msec Almost all, "H" is input
Digital In U-bit CD format subcode Q sync (SCOR) input from the CXD2654R (IC121)
I
"L" is input every 13.3 msec Almost all, "H" is input
— Not used (fixed at "L")
System reset signal input from the reset switch (Q604) "L": reset
I
For several hundreds msec. after the power supply rises, "L" is input, then it changes to "H"
I Setting terminal for the test mode Not used (fixed at "L")
— Power supply terminal (+3.3V)
I Power supply for the internal real time clock and RAM
O Sub system clock output terminal (32.768 kHz)
I Sub system clock input terminal (32.768 kHz)
— Ground terminal
O Main system clock output terminal (12 MHz)
I Main system clock input terminal (12 MHz)
Setting terminal external ROM mode or internal ROM mode "L": internal ROM mode
I
(fixed at "L")
— Not used (open)
— Not used (fixed at "L")
I Internal status (SENSE) input from the CXD2654R (IC121)
I
Track jump detection signal input from the CXD2654R (IC121)
— Not used (fixed at "L")
O
Relay drive signal output for the power on/off "L": standby mode, "H": relay on
I Detection input from the recording position detect switch (S601) "L" active
I
Detection input from the playback position detect switch (S604) "L" active
Loading motor drive voltage control signal output for the loading motor driver (IC602)
O
"H" active
— Not used (open)
I
Busy status signal input from the CXD2654R (IC121)
I Spindle servo lock status monitor signal input from the CXD2654R (IC121)
O LED drive signal output terminal "L": LED on Not used (open)
— Not used (fixed at "L")
— Not used (open)
— Ground terminal
Description
– 115 –
"L": chucking