Schematic Diagrams - Yamaha A-S500 Service Manual

A B C

SCHEMATIC DIAGRAMS

FUNCTION 1/2
1
2
3
1
4
PB
2
LINE REC
5
PB
0
0
0
0
3
0
6 0
0
0
0
REC
0
0
0
0
0
0
0
0
0
0
0
7
TUNER
8
FUNCTION (2)
IC501, 507: RP130Q501D-TR-F
Voltage regulator
IC503: LE24C023M-TLM-E
Two wire serial interface EEPROM
V DD 4 3 V OUT
9
WP
SCL
Vref
Current Limit
CE 1 2 GND
Pin No. Symbol Description
1 CE Chip Enable ("H" Active)
SDA
2 GND Ground Pin
3 V OUT Output Pin
10
4 V Input Pin
DD
★ All voltages are measured with a 10MΩ/V DC electronic voltmeter.
● 電圧は、内部抵抗 10MΩの電圧計で測定したものです。
★ Components having special characteristics are marked
and must be replaced ●
with parts having specifications equal to those originally installed. パーツリストに記載されている部品を使用してください。
★ Schematic diagram is subject to change without notice.
● 本回路図は標準回路図です。改良のため予告なく変更することがあります。
D E F
CB403
IC402
0 0
0 0
0 0
0
0
CD IN
0
0
0
0
0
IC401 0
0
0
0
0
0
0
0
0
0
0
0
7.3
7.3 15.5
7.9
0
0
-7.8
-7.2 -15.3
VOL OUT
IC502: R5F364A6NFA
Single chip 16-bit microprocessor
Page 55 L6
8
8
to OPERATION (9)_CB851
Port P0 Port P1 Port P1
VCC2 ports
Internal peripheral functions
Write controller High voltage generator
Timer (16-bit)
Outputs (timer A): 5
Inputs (timer B): 6
Three-phase motor control circuit
EEPROM Array
Real-time clock
PWM function (8-bit x 2)
Remote control signal
NC 1 8 VDD
receiver (2 circuits)
Y decoder and Sense AMP
NC 2 7 WP
Watchdog timer
NC 3 6
SCL (15-bit)
Serial-Parallel converter
GND 4 5 SDA
A/D converter
(10-bit resolution X 26 channels)
D/A converter
(8-bit resolution X 2 circuits)
印のある部品は、安全性確保部品を示しています。部品の交換が必要な場合、
VCC1 ports
Port P10 Port P9
8 8
G H
A-S300
Page 55 B5 Page 55 B7
to OPERATION (2)_W807 to OPERATION (2)_CB802
IC501 IC507
5.6 5.0 5.6 5.0
A-S500
A-S300
5.6 0 5.0 0
0
0
0
5.0
1.0
1.0
0
CB404 CB504
0 0 5.0
5.0
0 0
0 0
1.6
0 0
0 0 0
0 0 0
0 0 0
2.9
0 0
3.7
0 0
0
0 0
0 0 0
1
0 0 2.8
B
5.0
5.0
0
1.6
0
2.9
0
CB405 CB502
15.5 15.5
15.5 15.5
-15.3
-15.3
-15.3 -15.3
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0 5.0
0 0
0
0
0
5.0
0 0
5.0
0
5.0
Page 54 G6 Page 54 G4
8 8 8 8
to FUNCTION (3)_CB602 to FUNCTION (3)_CB601
(J model)
Port P3 Port P4 Port P5
System clock generator
UART or
clock synchronous serial I/O -X
X IN OUT
(6 channels)
X CIN -X COUT
PLL frequency synthesizer
Clock synchronous serial I/O
On-chip oscillator (125 kHz)
(8 bit x 2 channels)
DMAC (4 channels)
2
Multi-master I C-bus interface POINT A XL501 (Pin 13 of IC502)
(1 channel) CRC arithmetic circuit
(CRC-CCITT or CRC-16)
CEC function Voltage detecter
Power-on reset
On-chip debugger
M16C/60 series
Memory
Microprocessor core
ROM
R0H R0L SB
R1H R1L USP RAM
R2
R3 ISP
INTB
A0
PC
A1 A1
FB FB FLG Multiplier
(N_RST)
Port P8 Port P7 Port P6
8 8 8
I J K
A-S300
Page 55 J3
to OPERATION (5)_W812
CB513
R516
4.7K
8.2K
W504
5.0
0
0
0
0
0
0
5.0
CB506
1.6
0
5.0
5.0
0
1.0
1.0
5.0
0
0 5.0
0
0
4.9
0
4.9
5.0
0
MICROPROCESSOR
0
0
IC502
0
0
0
0
0
CB508
5.6
0
2
0
2.9
0
A 0
0
0
0 5.0
4.9
5.0
0
5.0
0
0
4.9
CB509
0
0 0
0
5.0 0
0
0
0
5.0
0
5.0
IC503
0
5.0
5.0
0
5.0
FUNCTION (1)
Page 61 F10 Page 56 G7 Page 58 K6
to DOCK_CB302 to OPERATION (1)_CB2 to MAIN (6)_CB14
(A-S500)
Page 60 K6
to MAIN (6)_CB14
(A-S300)
POINT B 1 / IC502 (99 pin, +5M), 2 / IC502 (12 pin, N_RST)
IC502 1 IC502 1
(+5M) (+5M)
IC502 2 IC502 2
(N_RST)
AC POWER ON AC POWER OFF AC POWER ON
(Connect the power cable) (Disconnect the power cable) (Connect the power cable)
L M N
A-S500/A-S300
A-S500 A-S500/A-S300
Page 55 J8
to OPERATION (9)_CB853
Page 57 H9
to MAIN (1)_W105
(A-S500)
Page 59 H9
to MAIN (1)_W105
(A-S300)
Page 61 I3
to DOCK_CB303
Writing port
IC401: R2A15220FP
8-channel electronic volume with 11 input selector and tone control
50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31
MUTE 51 30 TRER
MCU
AVEE
AVCC
I/F BASSR2
A VEE 52 29
53 28 BASSR1
ADCL
0/-6/-12/-18dB
ATT
ADCR 54 27 TREL
SUB2
AGND BASSL2
55 26
MAIN
INR1 56 25 BASSL1
Bass/Treble
0~-95dB,
-14~+14dB +42~0dB
-∞ (0.5dBstep)
INL1 (2dBstep) FRC
57 (0.5dBstep) Bypass 24
Tone
INR2
58 Tone+MIX 23 FR Pre-OUT
Tone
SUB
INL2 +42~0dB
59 22 FROUT
(0.5dBstep)
Tone+MIX
INR3 60 Tone Tone 21 AGND
Bypass
FLOUT
INL3 61 20
0~95dB, Bass/Treble
-∞ -14~+14dB
INR4 (0.5dBstep) (2dBstep) FL Pre-OUT
62 19
INL4 63 18 FLC
+42~-95dB
-(0.5dBstep)
INR5 64 17 CC
INL5 65 16 COUT
+42~-95dB
AGND
INR6 66 -∞(0.5dBstep) 15
+42~-95dB
-∞(0.5dBstep)
INL6 67 14 SWOUT
SWC
INR7 68 13
INL7 69 +42~-95dB 12 SRC
-∞(0.5dBstep)
70
INR8 11 SR Pre-OUT
REC
SROUT
INL8 71 10
+42~-95dB
-∞(0.5dBstep)
INRA/RECR1 72 9 A GND
INLA/RECL1 73 8 SLOUT
INR9 74 7 SL Pre-OUT
+42~-95dB
-∞(0.5dBstep)
INL9
75 6 SLC
INRB/RECR2 76 5
AGND
INLB/RECL2 77 4 SBRC
INR10/RECR4
78 3 SBR Pre-OUT
INR10/RECL4 79 2 SBR OUT
INR11/RECR5 AGND
80 1
81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100
53