
| IC102 | 
 | 
 | 
 | |||
| LRCI | 1 | INPUT | 
 | 16 | DB/DS | |
| BCKI | 2 | DIGITAL | 15 | MOD2 | ||
| INTERFACE | ||||||
| DI | 3 | 14 | MOD1 | |||
| 
 | SIGNAL | |||||
| 
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 | 13 | OPT | ||
| 
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 | PROCESSOR | |||
| 
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 | SYSTEM | 
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| CLK | 4 | CLOCK | 
 | 12 | VDD | |
| VSS | 5 | 
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| 
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| RSTN | 6 | SEQUENTIAL | OUTPUT | 11 | LRCO | |
| CONTROL | 10 | BCKO | ||||
| TESTN | 7 | INTERFACE | ||||
| 
 | 9 | DOUT | ||||
| MUTE | 
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| MUTEN | 8 | 
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| CONTROL | 
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| 
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| 
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 | MODE | 
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 | |
| 
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 | CONTROL | 
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 | |
IC401 TC9464FN-EL  (MAIN BOARD)
| LRCK | BCK | DATA | 
 | HS | (SM) ATT | (EMP) SH | (BS) LA | VDX | XO | XI | GNDX | MCK | 
| 24 | 23 | 22 | 
 | 21 | 20 | 19 | 18 | 17 | 16 | 15 | 14 | 13 | 
| INTERFACE | 
 | 
 | MICROCOMPUTER | 
 | OSC | 
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| CIRCUIT | 
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 | INTERFACE | 
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| 
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| 
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 | CIRCUIT | 
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| 
 | 
 | DIGITAL FILTER CIRCUIT | 
 | 
 | TIMING | 
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 | ||||
| ATTENUATOR OPERATIONAL CIRCUIT | GENERATOR | 
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 | |||||||||
| 
 | DEEMPHASIS FILTER CIRCUIT | 
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| 
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| 
 | TEST | 
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 | OUTPUT | 
 | OUTPUT | 
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 | |||
| CIRCUIT | 
 | 
 | CIRCUIT | 
 | CIRCUIT | 
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 | ||||
| 
 | 
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 | 
 | ANALOG | 
 | ANALOG | 
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 | ||
| 
 | 
 | 
 | 
 | 
 | FILTER | 
 | FILTER | 
 | 
 | 
 | ||
| 1 | 2 | 
 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 
| VDD | T1 | 
 | P/S | VDA | RO | GNDA | VR | GNDA | LO | VDA | ZD | GNDD | 
| IC204 | 
 | 
 | |||||
| VCC | BUS ON | LINK OFF | CLK OUT | 
 | DATA OUT | DATA IN | RESET | 
| 14 | 13 | 12 | 11 | 
 | 10 | 9 | 8 | 
| 
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 | RESET | 
| 
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 | 
 | SWITCH | 
| 1 | 2 | 3 | 4 | 5 | 6 | 
 | 7 | 
| BUS ON OUT | BUS ON IN | GND | BUS CLK | VREF | BUS DATA | 
 | BUS RESET | 
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