Yamaha CD-S300 Service Manual page 30

CD-S300
Pin No. Function Name
51 DSP_/RST
52 REG_READY0
53 SUB_READY0
54 KEY_O/C
55 KEY_USB
56 KEY_PLAY
57 POFF_detect
58 KEY_0
59 KEY_1
60 KEY_2
61 D33 Detect
62 OPU_SEL
63 DRV_MUTE
64 LIMIT_SW
65 MON_1
66 MON_2
67 N.C.
68 N.C.
69 N.C.
70 LED_POWER
71 LED_PDIRECT
72 LED_USB1
73 LED_USB2
74 N.C.
75 VSS/AVSS
76 SLED_CTL
77 VREF
78 VCC/AVCC
79 STBY
80 EEP_SCL
Key detection for A/D port
Key input (A/D) pull-up resistance 10 k-ohms
Ohm
V
A/D value (3.3 V = 255)
KEY0 (58 pin)
KEY1 (59 pin)
Ohm
V
A/D value (3.3 V = 255)
KEY2 (60 pin)
30
I/O
O Reset signal to CD-DSP
I Input R_RDY signal from CD-DSP
I Input S_RDY signal from CD-DSP
I
I
I
I Detect PRIMARY_POWER_OFF condition
I Detect KEY_0 signal on front-panel
STOP, PAUSE, O/C
I Detect KEY_1 signal on front-panel
PLAY, SKIP+, SKIP-
I Detect KEY_2 signal on front-panel
Pure direct, CD/USB
I Reserved (Detect D+3.3)
I Input the signal to select OPU
0V : CD traverse
1.65V : DVD/CD traverse
O Mute control to actuator driver (IC1)
I Detect inner position SW on CD-traverse mechanism
I Input FMON0 (defect) signal from CD-DSP (IC2)
I Input FMON1(FSEQ) signal from CD-DSP (IC2)
O Control LED_POWER on front-panel
O Control LED_PURE DIRECT on front-panel
O Control LED_USB (orange) on front-panel
O Control LED_USB (green) on front-panel
GND DGND
O Reserved
Power Input the reference voltage (D+3.3V) for A/D port (pin 58–60, pin 62)
Power Input D+3.3V
O
O Serial clock to EEPROM (IC304)
0 +820
0 0.2–0.3
0 15–25
— STOP
— PLAY
0 +100
0 0.03-0.1
0 3–7
— PURE DIRECT
Detail of Function
3.3V : DVD/CD traverse
Low --> Muting output on actuator driver
+3.3 k +12.0 k
0.9–1.0 2.0–2.1
70–78 153–162
PAUSE OPEN/CLOSE
SKIP +/SEARCH + SKIP -/SEARCH -
+3.3 k +12.0 k
0.8–0.9 2.0–2.1
60–70 150–160
CD/USB —