Sony CDX-GT400 - Fm/am Compact Disc Player, Руководство по обслуживанию

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CDX-GT40W/GT400/GT450/GT450S
• IC PIN DESCRIPTIONS
• IC3 MB90486BPFV-G-177E1 (CD SYSTEM CONTROL) (SERVO BOARD (2/2))
Pin No. Pin Name I/O Pin Description
1 CDON_1500MV O Servo 1.5 V power supply control signal output
2 to 5 NC — Not used. (Open)
6 DRVON O Motor drive mute signal output
7 CD_BUS0 I/O Bus data input/output 0
8 CD_BUS1 I/O Bus data input/output 1
9 VSS — Ground
10 CD_BUS2 I/O Bus data input/output 2
11 CD_BUS3 I/O Bus data input/output 3
12 CD_BUCK O Bus clock signal output
13 CD_XCCE O Chip enable signal output
14 CD_XRST O Reset signal output
15 CD_ZDET I Zero detection signal input
16 to 20 NC — Not used. (Open)
21 VCC — Power supply pin (+3.3 V)
22 DAC_ZDETL I Zero data detection signal input (L-ch) (Connected to Vss)
23 DAC_ZDETR I Zero data detection signal input (R-ch) (Connected to Vss)
24 NC — Not used. (Open)
25 RXD I UART RXD data input (MCBUS/Flash data input)
26 TXD O UART TXD data output (MCBUS/Flash data output)
27 DEC_SSTBY O SRAM STANDBY mode control signal output
28, 29 NC — Not used. (Open)
30 DEC_INT I Request signal input
31, 32 NC — Not used. (Open)
33 AVCC — Power supply pin (+3.3 V) for A/D converter
34 AVRH — External reference voltage for A/D converter
35 AVSS — Ground
36 NC — Not used. (Open)
37 DEC_XMUTE O Mute signal output L: mute
38, 39 NC — Not used. (Open)
40 VSS — Ground
41 NC — Not used. (Open)
42 MEC_LIMIT I Sled limit in detection switch signal input
43 MEC_LOAD O Loading motor signal output (Load direction)
44 MEC_EJECT O Loading motor signal output (Eject direction)
45 MEC_INSW I Pack-in detection signal input
46 MEC_DSW I Chucking end detection switch signal input
47, 48 MD0, MD1 I CPU operation mode designation signal input (Connected to Vcc.)
49 MD2 I CPU operation mode designation signal input (Connected to Vss.)
50 BUS_ON I Bus on signal input L: bus on
51 BU_IN I Backup on/off signal input H: backup on, L: backup off
52 NC I Not used. (Open)
53 MEC_SELFSW I Disc insert detection switch signal input L: disc in interruption
54, 55 NC — Not used. (Open)
56 UNISI I Serial data input
57 UNISO O Serial data output
58 UNICKI I Serial clock input
59 LINEOFF O Line off signal output
60 A_ATT O Audio attenuation signal output H: ATT on