Sony HCD-PX333, Service Manual

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HCD-PX333
• MD DIGITAL BOARD IC1001 M30805MG-205GP (MD MECHANISM CONTROLLER)
Pin No. Pin Name I/O Description
1, 2
— O Not used (open)
3 LVL1
O L-ch level output terminal Not used (open)
4 LVL0
O R-ch level output terminal Not used (open)
5 to 7
— O Not used (open)
8 MUTE O
Muting control signal output to the D/A converter (IC1006) “L”: muting
9 DARST O
Reset signal output to the D/A converter (IC1006) “H”: reset
10 SLICERSEL O
IEC958 input selection signal output to the D/A converter (IC1006) “L”: MD, “H”: CD
11 LD-LOW
O
Loading motor drive voltage control signal output for the loading motor driver (IC1004)
“H” active
12 LDIN O
Motor control signal output to the loading motor driver (IC1004) “L” active *1
13 LDOUT
O Motor control signal output to the loading motor driver (IC1004) “L” active *1
Laser modulation select signal output to the HF module switch circuit
Stop: “L”, Playback power: “H”,
Recording power:
14 MOD O
15 BYTE I External data bus line byte selection signal input “L”: 16 bit, “H”: 8 bit (fixed at “L”)
16 CNVSS I Mode setting terminal “L ”: single-chip mode (fixed at “L ”)
17 X-CIN I Sub system clock input terminal Not used (open)
18 X-COUT O Sub system clock output terminal Not used (open)
19 RESET I
System reset signal input from the reset signal generator (IC931) “L”: reset
For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”
20 XOUT O Main system clock output terminal (10 MHz)
21 VSS0 — Ground terminal
22 XIN I Main system clock input terminal (10 MHz)
23 VCC0 — Power supply terminal (+3.3V)
24 NMI I Non-maskable interrupt input terminal “L” active (fixed at “H” in this set)
25 DQSY
I
Digital In U-bit CD format subcode Q sync (SCOR) input from the CXD2662R (IC151)
“L” is input every 13.3 msec Almost all, “H” is input
26 P.DOWN
I
Power down detection signal input from the system controller (IC501)
“L”: power down, normally: “H”
27 SQSY
I
Subcode Q sync (SCOR) input from the CXD2662R (IC151)
“L” is input every 13.3 msec Almost all, “H” is input
28 NC
O Not used (open)
29 LDON O
Laser diode on/off control signal output to the automatic power control circuit “H”: laser on
30 LIMIT-IN
I
Detection input from the sled limit-in detect switch (S101)
The optical pick-up is inner position when “L”
2 sec
0.5 sec
*1 Loading motor (M103) control
Mode
Terminal
LDIN (pin
qs
) “L” “H” “L” “H”
LDOUT (pin
qd
) “H” “L”
“L” “H”
LOADING EJECT BRAKE RUN IDLE