Yamaha AV-S70 Service Manual

Also see for AV-S70: Owner's manual Service manual

Contents

AV-S70/NX-SW70AV-S70/NX-SW70 KEY input (A-C) Pull-up resistance 10kΩΩVKEY 0(98pin)KEY 1(96pin)0— 0.556VOLUMENDSP+2k— 1.111VOLUMEBINPUT+10k— 3.889NO KEYNO KEY+2.4k— 2.222NO KEYNO KEY+3.9k— 2.778NO KEYNO KEY+5.6k— 3.333NO KEYNO KEY+1.8k— 1.667NO KEYNO KEY+24k— 4.444NO KEYNO KEY Destination select input (95 pin A-D) Pull-up resistance 10kΩΩVDestination51k3.889 — 4.444J model(Japanese)16k2.778 — 3.333J model(English)27k3.333 — 3.889B, G models(English)IC701 : M30218FCFP (16 bit μ-COM)No. PORT Name IN/OUT Function78 P52 FLD10 OUT SEGMENT 25 (P25) (VEE internal pull-down)79 P51 FLD9 OUT SEGMENT 26 (P26) (VEE internal pull-down)80 P50 FLD8 OUT SEGMENT 27 (P27) (VEE internal pull-down)81 P67 FLD7 OUT SEGMENT 28 (P28) (VEE internal pull-down)82 P66 FLD6 OUT SEGMENT 29 (P29) (VEE internal pull-down)83 P65 FLD5 OUT SEGMENT 30 (P30) (VEE internal pull-down)84 P64 FLD4 OUT SEGMENT 31 (P31) (VEE internal pull-down)85 P63 FLD3 OUT SEGMENT 32 (P32) (VEE internal pull-down)86 P62 FLD2 OUT SEGMENT 32 (P33) (VEE internal pull-down)87 P61 FLD1 OUT SEGMENT 34 (P34) (VEE internal pull-down)88 P60 FLD0 OUT SEGMENT 35 (P35) (VEE internal pull-down)89 VEE - - P0, P1, P5, P6 pull-down resistance voltage input [-29V]90 P107 AN7 A-D IN SW protection IN [4.0-5.0V:SW provided, 2.5V:SW not provided, 0-2.0V:SW protection ON]91 P106 AN6 A-D IN AUTO POWER ON/OFF identify IN (music signal) [0 — VREF]92 P105 AN5 A-D IN Center unit power supply voltage detect IN (protection) [0 — VREF]93 P104 CMOS OUT Night mode switching OUT [1:ON]94 P103 CMOS OUT Center unit power supply OUT [1:ON]95 P102 AN2 A-D IN Destination select input [Pull-up with 10kΩ > VREF]96 P101 AN1 A-D IN KEY 1 input [Pull-up with 10kΩ > VREF]97 AVSS - - Connected to VSS (GND)98 P100 AN0 A-D IN KEY O input [Pull-up with 10kΩ > VREF]99 VREF - - A-D, D-A reference voltage input [— VCC]100 AVCC - - Connected to VCC terminal (+5V)16For any voltage that is not within the above range, the applicable destination is EX (English).✽✽ SYSTEM CONNECTOR (Pin 90 of IC701)1. Pin 3 of the system connector (CN602) detects if the subwoofer is equipped / not equipped / faulty.• When the system connector is connected correctly and the subwoofer is operating properly, approximately4 to 5V voltage is obtained.• When the system connector is not connected, approximately 2.5V voltage is obtained.• When the protection circuit of the subwoofer is at work, approximately 0 to 2V voltage is obtained andthe protection circuit of AV-S70 works together with it.2. When the system connector is not connected or the power of the subwoofer (NX-SW70) is not turned ON, only VIRTUALSURROUND and MONO MOVIE functions of the sound field program are available.241 86537CN602SYSTEM CONNECTORwww . xiaoyu163. comQQ 376315150 992894298TEL 13942296513 992894298051513673QQTEL 13942296513 QQ 376315150 892498299TEL 13942296513 QQ 376315150 892498299http://www.xiaoyu163.comhttp://www.xiaoyu163.com