Sony MDX-C670, Service Manual

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3-3. MAIN BOARD IC751 MN1883220Y5D1 (TUNER CONTROLLER) (MDX-C670RDS)
1 RD I Read pulse input terminal of data (D0 to D3) (Not used in this set) (open)
2 BUSY I BUSY output monitor terminal (Not used in this set) (open)
3 D3 I/O Command input/output (Not used in this set) (open)
4 D2 I/O Command input/output (Not used in this set) (open)
5 D1 I/O Command input/output (Not used in this set) (open)
6 D0 I/O Command input/output (Not used in this set) (open)
7 VDD – Power supply (+5 V)
8 X1 O System clock input (8.0 MHz)
9 X2 I System clock output (8.0 MHz)
10 GND – Ground
11 XI I Connected to the GND
12 – – Not used (open)
13 XO O Connected to the GND
14 RESET I Reset input
15 RDS-CLK I RDS serial clock input pin
16 BU-IN I BATT voltage detection pin
17 BUSON I BUS ON control input pin
18-29 – – Not used (open)
30 RDS-DATA I RDS serial data input pin
31 – – Connected to the GND
32-35 – – Not used (open)
36 – – Connected to the GND
37 – – Connected to the GND
38 PLL-DI I PLL serial data input pin
39 PLL-DO O PLL serial data output pin
40 PLL-CLK O PLL serial clock output pin
41 CE O PLL serial chip enable output pin
42 RQ O Bus request signal output pin
43 LINK-OFF O Link-off signal output pin (for SONY BUS)
44 SCK I Serial clock input pin (for SONY BUS)
45 SI I Serial data input pin (for SONY BUS)
46 SO O Serial data output pin (for SONY BUS)
47 VDD – Power supply (+5 V)
48 AVDD – Power supply for A/D converter (+5 V)
49 VREF – Reference power supply (+5 V)
50, 51 – – Connect to the GND
52 SRAM-RST I SRAM reset signal input pin
53 MUTE-SEL I Muting select signal input pin (Not used in this set) (Connected to the GND)
54 MS-1 I Destination setting pin (Not used in this set) (Connected to the GND)
55 MS-2 I Destination setting pin (Not used in this set) (Connected to the GND)
56 AM-S.METER I AM signal meter voltage detection pin
57 FM-S.METER I FM signal meter voltage detection pin
58 – – Connected to the GND
Pin No. Pin Name I/O Function