Sony MEX-BT5100 Service Manual page 51

SERVO BOARD IC3 MB90486BPMC-G-177E1 (CD SYSTEM CONTROL)
Pin No. Pin Name
1 CDON_1500MV
2 to 5 NC
6 DRVON
7, 8 CD_BUS0, CD_BUS1
9 VSS
10, 11 CD_BUS2, CD_BUS3
12 CD_BUCK
13 CD_XCCE
14 CD_XRST
15 CD_ZDET
16 to 20 NC
21 VCC
22 DAC_ZDETL
23 DAC_ZDETR
24 NC
25 RXD
26 TXD
27 DEC_SSTBY
28, 29 NC
30 DEC_INT
31, 32 NC
33 AVCC
34 AVRH
35 AVSS
36 NC
37 DEC_XMUTE
38, 39 NC
40 VSS
41 NC
42 MEC_LIMIT
43 MEC_LOAD
44 MEC_EJECT
45 MEC_INSW
46 MEC_DSW
47 to 49 MD0 to MD2
50 BUS_ON
51 BU_IN
52 NC
53 MEC_SELFSW
54, 55 NC
56 UNISI
57 UNISO
58 UNICKI
59 LINKOFF
60 A_ATT
61 XFLASH & EJECT_OK
62 OPEN_REQ
63 MECON
64 CDON
65 XUART
66 ZMUTE
67 MECON_CHK
68 CDON_CHK
69 to 74 NC
75 RSTX
I/O
O Servo 1.5 V power supply control signal output terminal
- Not used
O Motor drive muting on/off control signal output terminal
I/O Bus data input/output with the RF amplifi er
- Ground terminal
I/O Bus data input/output with the RF amplifi er
O Bus clock signal output to the RF amplifi er
O Chip enable signal output to the RF amplifi er
O Reset signal output to the RF amplifi er
I Zero detection signal input from the RF amplifi er
- Not used
- Power supply terminal (+3.3 V)
I Zero data detection signal input terminal (L-ch)
I Zero data detection signal input terminal (R-ch)
- Not used
I Serial data input from the SONY bus interface IC
O Serial data output to the SONY bus interface IC
O S-RAM standby mode control signal output to the RF amplifi er
- Not used
I Request signal input from the RF amplifi er
- Not used
- Power supply terminal (+3.3 V) for A/D converter
- External reference voltage for A/D converter
- Ground terminal
- Not used
O Muting on/off control signal output to the RF amplifi er
- Not used
- Ground terminal
- Not used
I Sled limit in detection switch signal input terminal
O Loading motor signal output to the coil/motor drive (Load direction)
O Loading motor signal output to the coil/motor drive (Eject direction)
I Pack-in detection signal input terminal
I Chucking end detection switch signal input terminal
I CPU operation mode setting terminal
I SONY bus on/off control signal input terminal
I Back up power supply detection signal input terminal
I Not used
I Disc insert detection switch signal input terminal
- Not used
I Serial data input from the SONY bus interface IC
O Serial data output to the SONY bus interface IC
I Serial data transfer clock signal input from the system controller
O Line off signal output terminal
O Muting on/off control signal output terminal
I CD eject OK signal input from the system controller
O Front panel open/close request signal output terminal
O Mechanism deck power supply on/off control signal output terminal
O CD servo power supply detection output terminal
I Sony-bus/MC-bus change signal input terminal
O Muting on/off control signal output to the system controller
I CD mecha +6V power rising detection signal input
I CD servo +3.3V power rising detection signal input terminal
- Not used
I System reset signal input terminal
Description
Not used
Not used
"L": mute
"L": bus on
"L" is input at low voltage
"L": disc in interruption
Not used
Not used
MEX-BT5100
51