Yamaha AV-S70 Service Manual page 17

IC701 : M30218FCFP (16 bit
No. PORT Name
78 P52 FLD10
79 P51 FLD9
80 P50 FLD8
81 P67 FLD7
82 P66 FLD6
83 P65 FLD5
84 P64 FLD4
85 P63 FLD3
86 P62 FLD2
87 P61 FLD1
88 P60 FLD0
89 VEE -
90 P107 AN7
91 P106 AN6
92 P105 AN5
93 P104 CMOS
94 P103 CMOS
95 P102 AN2
96 P101 AN1
97 AVSS -
98 P100 AN0
99 VREF -
100 AVCC -
KEY input (A-C) Pull-up resistance 10k
Ω
0 +2k
V
— 0.556 — 1.111
KEY 0
VOLUME VOLUME
(98pin)
N B
KEY 1
DSP INPUT
(96pin)
Destination select input (95 pin A-D) Pull-up resistance 10k
Ω
16k
V
2.778 — 3.333
Destination J model
(English)
For 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.
CN602
• When the system connector is connected correctly and the subwoofer is operating properly, approximately
SYSTEM CONNECTOR
4 to 5V voltage is obtained.
2
4 5
• When the system connector is not connected, approximately 2.5V voltage is obtained.
1 8 3
• When the protection circuit of the subwoofer is at work, approximately 0 to 2V voltage is obtained and
6 7
the 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 VIRTUAL
SURROUND and MONO MOVIE functions of the sound field program are available.
µ
-COM)
IN/OUT
OUT SEGMENT 25 (P25)
OUT SEGMENT 26 (P26)
OUT SEGMENT 27 (P27)
OUT SEGMENT 28 (P28)
OUT SEGMENT 29 (P29)
OUT SEGMENT 30 (P30)
OUT SEGMENT 31 (P31)
OUT SEGMENT 32 (P32)
OUT SEGMENT 32 (P33)
OUT SEGMENT 34 (P34)
OUT SEGMENT 35 (P35)
- P0, P1, P5, P6 pull-down resistance voltage input
A-D IN SW protection IN [4.0-5.0V:SW provided, 2.5V:SW not provided, 0-2.0V:SW protection ON]
A-D IN AUTO POWER ON/OFF identify IN (music signal)
A-D IN Center unit power supply voltage detect IN (protection)
OUT Night mode switching OUT
OUT Center unit power supply OUT
A-D IN Destination select input
A-D IN KEY 1 input
- Connected to VSS (GND)
A-D IN KEY O input
- A-D, D-A reference voltage input
- Connected to VCC terminal (+5V)
Ω
+1.8k +2.4k
— 1.667 — 2.222
NO KEY NO KEY
NO KEY NO KEY
27k
3.333 — 3.889 3.889 — 4.444
J model
B, G models
(English)
(Japanese)
Function
+3.9k +5.6k
— 2.778 — 3.333
NO KEY NO KEY
NO KEY NO KEY
Ω
51k
AV-S70/NX-SW70
(VEE internal pull-down)
(VEE internal pull-down)
(VEE internal pull-down)
(VEE internal pull-down)
(VEE internal pull-down)
(VEE internal pull-down)
(VEE internal pull-down)
(VEE internal pull-down)
(VEE internal pull-down)
(VEE internal pull-down)
(VEE internal pull-down)
[-29V]
[0 — VREF]
[0 — VREF]
[1:ON]
[1:ON]
[Pull-up with 10kΩ > VREF]
[Pull-up with 10kΩ > VREF]
[Pull-up with 10kΩ > VREF]
[— VCC]
+10k
+24k
— 3.889 — 4.444
NO KEY NO KEY
NO KEY NO KEY
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