Sony MDS-JB920 Service Manual page 39

Pin No. Pin Name I/O
Laser power select signal output to the CXD2654R (IC121) and HF module switch circuit
59 WR-PWR O
"H": recording mode, "L": playback mode
60 MNT3 (SLOCK) I Spindle servo lock status monitor signal input from the CXD2654R (IC121)
61 SDA I/O Two-way data bus with the EEPROM (IC171)
62 +3.3V
— Power supply terminal (+3.3V)
63 NC I Not used (fixed at "L")
64 GND — Ground terminal
Recording data output enable signal output to the CXD2654R (IC121) and overwrite head
65 SCTX O
driver (IC181) Writing data transmission timing output (Also serves as the magnetic head on/off
output)
66 SCL O Clock signal output to the EEPROM (IC171)
Focus OK signal input from the CXD2654R (IC121)
67 MNT0 (FOK) I
"H" is input when focus is on ("L": NG)
Detection input from the sled limit-in detect switch (S101)
68 LIMIT-IN I
The optical pick-up is inner position when "L"
Laser modulation select signal output to the HF module switch circuit
Playback power: "H", Stop: "L",
Recording power:
69 MOD O
70 XLATCH O Serial data latch pulse signal output to the CXD2654R (IC121)
71 NC
I Not used (fixed at "L")
72 REC/PB I Not used (fixed at "L")
73 PACK-IN I
Detection input from the disc detect switch Not used (fixed at "L")
74 PB-P I Detection input from the playback position detect switch (S604) "L" active
75 CHACK IN I Detection input from the disc chucking-in detect switch (S603)
Detection input from the loading-out detect switch (S602)
76 PACK-OUT I
"L" at a load-out position, others: "H"
77 REC-P I Detection input from the recording position detect switch (S601) "L" active
78 LDIN O
Motor control signal output to the loading motor driver (IC400) "L" active *1
79 LDOUT O Motor control signal output to the loading motor driver (IC400) "L" active *1
Loading motor drive voltage control signal output for the loading motor driver (IC400)
80 LD-LOW
O
"H" active
81 NC I Not used (fixed at "L")
82 A1OUT O Sircs remote control signal output of the S-LINK CONTROL A1
83 MUTE O
Audio line muting on/off control signal output terminal "L": line muting on
84 STB O Strobe signal output to the power supply circuit "H": power on, "L": standby mode
*1 Loading motor (M103) control
Mode
LOADING EJECT
Terminal
LDIN (pin &•)
"L" "H"
LDOUT (pin &ª)
"H" "L"
Function
0.5 sec
2 sec
"L": chucking
BRAKE RUN IDLE
"L" "H"
"L" "H"
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Pin No. Pin Name I/O
Optical in 1/2 or coaxial in selection signal output to the digital input selector (IC300)
85 COAX/XOPT O
"L": OPT 1/2, "H": COAXIAL
Optical in 1 or optical in 2 selection signal output to the digital input selector (IC300)
86 OPT2/XOPT1 O
"L": OPT 1, "H": OPT 2
87 DALATCH
O Serial data latch pulse signal output to the D/A converter (IC200)
88 DARST O Reset signal output to the A/D converter (IC100) and D/A converter (IC200) "L": reset
89 LED0 O LED drive signal output terminal Not used (pull down)
90 LED1 O
LED drive signal output terminal Not used (pull down)
TIMER switch (S751) input terminal (A/D input)
91
TIMER I
"L": PLAY, "H": REC (OFF: center voltage)
92
SOURCE I INPUT switch (S741) input terminal (A/D input)
Key input terminal (A/D input) S731 to S734 (TIME, FADER, MUSIC SYNC, MEGA
93
KEY3 I
CONTROL keys input)
Key input terminal (A/D input) S722 to S726 (PLAY/MODE, REPEAT, SCROLL/CLOCK
94 KEY2 I
SET, DISPLAY/CHAR, I/u keys input)
Key input terminal (A/D input) S711 to S714 and S716 (MENU/NO, YES, PUSH ENTER, §
95
KEY1 I
EJECT keys input)
96 AVSS
— Ground terminal
97 KEY0 I Key input terminal (A/D input) S701 to S706 (r REC, p, ), 0, P, · keys input)
98 VREF I Reference voltage (+3.3V) input terminal (for A/D converter)
99 +3.3V
— Power supply terminal (+3.3V) (for analog system )
100 MONO/ST I REC MODE switch (S746) input terminal "L": MONO, "H": STEREO
MDS-JB920
Function
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