Yamaha A-s300 Service Manual

							31
A-S500/A-S300
A-S500/A-S300
Pin
No.Port NameFunction Name
¢P.C.B.
£I/O
Detail of Function
Power On
Standby
MCU Sleep
[AC OFF]1 P9_6/ANEX1/SOUT4 NC O O O
2 P9_5/ANEX0/CLK4 TRIG O O O
3 P9_4/DA1/TB4IN MPLED O O O LED control for MAIN POWER ON display
4 P9_3/DA0/TB3IN FL_N_RST O O O
5 P9_2/TB2IN/SOUT3 FL_MOSI SO O O
6 P9_1/TB1IN/SIN3 FL_N_CE O O O
7 P9_0/TB0IN/CLK3 FL_SCK SO O O
8 BYTE BYTE MCU MCU MCU Connect to Vss when in the single chip mode (External data bus width change: 16 bit)
9 CNVss CNVSS MCU MCU MCU Low: processor mode select: single chip mode
Hi: To the FLASH included boot mode
10 P8_7/XCIN NC O O O
11 P8_6/XCOUT ZPLED O O O
12 RESET N_RST MCU MCU MCU Reset input
13 Xout XOUT MCU MCU MCU Main clock 20MHz output
14 Vss VSS MCU MCU MCU
15 Xin XIN MCU MCU MCU Main clock 20MHz input
16 Vcc1 VCC MCU MCU MCU
17 P8_5/NMI/SD
* Nch Open DrainNMI MCU MCU MCU Unused, Pull Up
18 P8_4/INT2/ZP KEY1_N_INT IRQ IRQ I
19 P8_3/INT1 MPSW I IRQ I MAIN POWER SW detection interrupt input
20 P8_2/INT0 REM IRQ IRQ I Remote control pulse input detection interrupt input
21 P8_1/TA4IN/U/CTS5/
RTS5NC O O O Free terminal
22 P8_0/TA4OUT/U//RXD5/
SCL5SIRI_MISO SI O O
23 P7_7/TA3IN/CLK5 IPD_N_APDET I I I iPod accessory power control
24 P7_6/TA3OUT/TXD5/
SDA5SIRI_MOSI SO O O
25 P7_5/TA2IN/W DOCK_PON O O O DOCK power supply ON/OFF control
Hi=ON, Low=Off
26 P7_4/TA2OUT/W UAW_PON O O O UAW power supply ON/OFF control
Hi=ON, Low=Off
27 P7_3/CTS2/RTS2/TA1IN/
VSIRI_PON O O O
28 P7_2/CLK2/TA1OUT/V IPD_N_VON O O O
29 P7_1/RXD2/SCL2/TA0IN/
TB5IN
* Nch Open DrainIPD_MISO SI IRQ I iPod UART communication
iPod communication detection interrupt input when in the standby mode
30 P7_0/TXD2/SDA2/
TA0OUT
* Nch Open DrainIPD_MOSI SO O O iPod UART communication
31 P6_7/TXD1/SDA1 TXDF SO SO [MCU] For easy emulation
For writing FLASH (Rx)
32 P6_6/RXD1/SCL1 RXDF SI SI [MCU] For easy emulation
For writing FLASH (Tx)
33 P6_5/CLK1 CLKF SO SO [MCU] For easy emulation
For writing FLASH (Clock)
34 P6_4/CTS1/RTS1/CTS0/
CLKS1BSY O O [MCU] For easy emulation
BUSY signal output for writing FLASH
35 P6_3/TXD0/SDA0 NC O O OI2C fs=100k/400k 
36 P6_2/RXD0/SCL0 NC O O OI2C fs=100k/400k 
37 P6_1/CLK0 NC O O O
38 P6_0/CTS0/RTS0 N_Z2MT O O O
39 P5_7/RDY/CLKOUT EVOL_SCK O O O Electronic VOLUME control serial clock
40 P5_6/ALE EVOL_MOSI O O O Electronic VOLUME control serial data
41 P5_5/HOLD N_EPM I - - For writing FLASH (Low)
Pull it down as it may fall in the Hiz state while the emulator is working
42 P5_4/HLDA TU_N_ST I I I
43 P5_3/BCLK TU_N_TUNED I I I
44 P5_2/RD RDS_N_RST O O O
45 P5_1/WRH/BHE RDS_SCK O O O
46 P5_0/WRL/WR N_CE I - - For writing FLASH (Hi) 
47 P4_7/TXD7/SDA7/
/CS3TU_SDA SIO O O
48 P4_6/RXD7/SCL7/
CS2TU_SCL SO O O
49 P4_5/CLK7/CS1 RDS_MISO I I I
50 P4_4/CTS7/RTS7/CS0 RDS_RDY I I I 
						

							32
A-S500/A-S300
A-S500/A-S300
Pin
No.Port NameFunction Name
¢P.C.B.
£I/O
Detail of Function
Power On
Standby
MCU Sleep
[AC OFF]51 P4_3/A19 ISB I I I Encoder phase detection input/output for Input selector
52 P4_2/A18 ISA I I I Encoder phase detection input/output for Input selector
53 P4_1/A17 LINE3_LED O O O LINE3 LED lighting control
54 P4_0/A16 LINE2_LED O O O LINE2 LED lighting control
55 P3_7/A15 LINE1_LED O O O LINE1 LED lighting control
56 P3_6/A14 CD_LED O O O CD LED lighting control
57 P3_5/A13 TUNER_LED O O O TUNER LED lighting control
58 P3_4/A12 DOCK_LED O O O DOCK LED lighting control
59 P3_3/A11 PHONO_LED O O O PHONO LED lighting control
60 P3_2/A10 VOL_RB I I I
61 P3_1/A9 VOL_RA I I I
62 Vcc2 VCC MCU MCU MCU
63 P3_0/A8 CD_SW I I I
64 Vss VSS MCU MCU MCU
65 P2_7/AN2_7/A7 PD_SW I I I Pure Direct detection
66 P2_6/AN2_6/A6 N_PREMT O O O PRE OUT MUTE control
Low=MUTE ON
67 P2_5/INT7/AN2_5/A5 IPD_MISO IRQ IRQ IRQ iPod communication detection interrupt input when in the standby mode
(Used when 29 pin common terminal is not available)
68 P2_4/INT6/AN2_4/A4 IPD_DET IRQ IRQ IRQ iPod detection interrupt input
69 P2_3/AN2_3/A3 DOCK_TYPE AD AD AD Equipment type detection AD value input
70 P2_2/AN2_2/A2 +5S_PON O O O +5S drive control
71 P2_1/AN2_1/A1 DEST AD AD AD Destination discrimination AD value input
72 P2_0/AN2_0/A0 MODEL AD AD AD MODEL discrimination AD value input
73 P1_7/INT5/D15 PRI IRQ IRQ IRQ POWER AMP current protection detection interrupt input
Low=Normal  Hi=Abnormal
74 P1_6/INT4/D14 NC O O O Free terminal
75 P1_5/INT3/D13 PW_DET IRQ IRQ IRQ PW_DET detection interrupt input
76 P1_4/D12 NC O O O Free terminal
77 P1_3/TXD6/SDA6/D11 EEP_SDA SO O O EEPROM I2C communication  bus data
78 P1_2/RXD6/SCL6/D10 EEP_SCL SO O O EEPROM I2C communication  bus clock
79 P1_1/CLK6/D9 PRY O O O Power relay control
80 P1_0/CTS6/RTS6/D8 DLED O O O Direct LED power supply control
81 P0_7/AN0_7/D7 N_SWMT O O O SUBWOOFER MUTE control
Low=MUTE ON
82 P0_6/AN0_6/D6 PWR_MGT I I I Power management detection input
83 P0_5/AN0_5/D5 THMR AD AD AD Right-hand side heat sinc temperature detection AD value inp
ut
84 P0_4/AN0_4/D4 THML AD AD AD Left-hand side heat sinc temperature detection AD value input
85 P0_3/AN0_3/D3 SPBRY O O O Speaker B relay control
86 P0_2/AN0_2/D2 SPARY O O O Speaker A relay control
87 P0_1/AN0_1/D1 HPRY O O O Headphone relay control
88 P0_0/AN0_0/D0 NC O O O Free terminal
89 P10_7/AN7/KI3 PRD AD AD AD DC protection detection
90 P10_6/AN6/KI2 AD_VOL AD AD AD VOLUME position detection AD value taken input
91 P10_5/AN5/KI1 VRUP O O O MOTOR VOLUME + direction control
92 P10_4/AN4/KI0 VRDN O O O MOTOR VOLUME - direction control
93 P10_3/AN3 PRV AD AD AD Protection voltage detection AD value taken input
94 P10_2/AN2 KEY1 AD AD AD KEY1 AD value taken input
95 P10_1/AN1 KEY0 AD AD AD
96 Avss AVSS MCU MCU MCU
97 P10_0/AN0 REC AD AD AD REC OUT Selector voltage detection AD value taken input
98 Vref VREF MCU MCU MCU
99 Avcc AVCC MCU MCU MCU
100 P9_7/ADTRG/SIN4 DIG_SW I I I DIG_SW input 
						

							33
A-S500/A-S300
A-S500/A-S300
■  PIN CONNECTION DIAGRAMS

8
4
1
80
151
30 81
10050
31
12 3
4
14 8110
14 8
+VS
GND VOUT
17
14
4 1
1. VIN2. VOUT3. GND
4. ON/OFF CONTROL
8
4
1
13 4
5
31
5
4
51
50
31 8180
100
30 1
LE24C023M-TLM-E
R2A15220FP
RP130Q501D-TR-F
NJM2068MD-TE2LB1641
NJM5532M-D
LM61CIZ
TC4013BPNJM2388F05
NJM4580E
TC7SET32FU R1190H055B-T1-FE R5F364A6NFA
ACAC
+–Anode
CathodeAnode
Cathode
Anode
CathodeAnode
Cathode
Anode
CathodeAnode
Cathode
Anode
CathodeAnode
Cathode
+ACAC–
113
24 2 3
4
HSU119TRF
HZU10B2HZU11B2 TRF-E
HZU30B TRF-E HZU5.1B2 TRF-E
HZU6.8B2 TRF-E
HZU7.5B1 TRF-E
HZU8.2B1 TRF-E
UDZS7.5B 7.5V (A-S300)
(A-S300)
(A-S300) HZU15B3 TRF-E
HZU16B2 TRF-E HZU5.6B1 TRF-E
HZU6.2B3 TRF-E
HZU7.5B3 TRF-E DB105
RR264M-400TR RS203M-B-C-J80 S5VB60UDZS5.1B 5.1V
UDZS11B 11V
UDZS16B 16V 1SS133
1SS1761T2
MTZJ5.1C RLS245
 
						

							34
A-S500/A-S300
A-S500/A-S300
E
C
B
BE CE
C
B
13 64
1. Drain
2. Drain
3. Gate
4. Source
5. Drain
6. Drain
21 1: GND
2: IN
3: OUT 3
B
C
EBE CE
C
B
E
C
BBE CB
C
EB
C
EECBE
C
B
B
C
EE
C
BC
E
BB
C
EB
C
EG
D
SD
INCOMMON OUT
B
C
E
E
C
B
B
C
E
2SD2704 K 2SD2705S TP 2SA1358 O,Y
2SC3421 O,Y
DTA143EKA
DTA144EKA
DTC114EKA2N5401C-AT/P 2SA1015-Y 2SA1037K 2SA1145 2SA1695 O,P,Y 2SA1708 2SA970-GR, BL
2SB1257 2SC1815 Y 2SC2412K 2SC27052SC4468 O,P,Y
2SC4488
2SD2014
KRC104S-RTK KTA1517SKTC3198
KTC3875S
KTC3911SMCH6336-TL-E
2SK3850
2SA2151
2SC6011
2SA2220
KTA1266 Y AT
 
						

							CD
LINE3PHONO 
EQ AMP  IC601
IC401
SW801
IC309
IC103 NJM2068MD-TE2IC901IC802
PRE AMP
NJM4580E
NJM4580EINPUT SELECTOR
MOTOR DRIVEN  
VOLUME TONE CONTROL 
PHONES
(OUT) (OUT)
(IN) (IN)78
79 56
57
58
59
62
63
74
75
80
81
64
65 76
77
72
7314
16
PURE DIRECTSP A  Lch
SP B  Lch
SP A  Rch
SP B  Rch
DOCK
TUNER
LOUDNESS
BALANCE
POWER AMP   
HEADPHONE
MUTEMUTE
SUBWOOFER
OUT
LPF REC OUT SELECTOR
(A-S500) 
M
IMPEDANCE SELECTOR  
+B
-B  
VOLTAGE SELECTOR
 (R model)
5.6V
MICROPROCESSOR
IR RECEIVER
STBY IND
+15V
-15V POWER AMP   
+7V
+7V
PRE AMP 
SELECTOR 
PRE AMP  SELECTOR 
MICROPROCESSORIC502
R5F364A6NFA
DRIVER +15 I / DC / THERMAL PROTECTION  SPEAKER 
RELAY 
OPERATION
DISPLAY   
IR REMOTE
POWER  SUPPLY  PROTECTION  
POWER  RELAY 
110-120   220-240  
+5V
DOCK
PORT  
SUB-TRANSFORMER  0.5-1.0 dB  0 dB 29.0dB 
HEADPHONE
RELAY  A
B
LINE2 
PB
RECPB REC
LINE1 
RECINH 1
INH 2
L+R +5V
B A
L CH SPEAKERS
MAIN
TRANSFORMER 
POWER
MANAGEMENT    
90Hz/12dB octOUTLET  RELAY (J model) VOLUME 
POWER  RELAY (J model)
OUTLET
(J model)
TE1
RY1 RY2JK701
T1 RY104 VR951 VR903 VR902 VR901
VR851
IC851
100
LB1641-ERY105
RY103
Q136 Q126 Q128
SW1 SW101
F1
Q7 Q6 C134
D14D24
D26 D111
C135
Q407Q406 IC1
SW501DB105
A/D 
A/D 
SERIAL DATA 
SERIAL DATA 
A/D 
SERIAL DATA 
A/D
PARALLEL
POWER  RELAY 
B A
R CH 
REC 
A-S500 model SP A/BDIRECT
SW   INPUT   VOLUME  
AC IN
OPERATION
DOCKr
 4FF
QBHF

→
SCHEMATIC DIAGRAMMAIN
r
 4FF
QBHF
–60 →
SCHEMATIC DIAGRAM
FUNCTION
r
 4FF
QBHF



→
SCHEMATIC DIAGRAM
MAINr
 4FF
QBHF
–60 →
SCHEMATIC DIAGRAM r
 4FF
QBHF



→
SCHEMATIC DIAGRAM
ABCDE FGH I J
1
2
3
4
5
6
7A-S500/A-S300
35
■ BLOCK DIAGRAM
A-S500
A-S300 
						

							CB511W502
CB508
CB509
W503 CB506
SW501
CB503
CB505
CB504 CB501 CB502
CB510CB515
W504
DOCKR
Writing port
DOCKL
AGND_DOCK
SIRIR
SIRIL
AGND_VIDEO
+15
-15
PRV-15AGND
+15
IPD_MISOIPD_N_DETSIRI_PONDOCK_PONIPD_APDETPRV+5.5SUB
IPOD_MOSIIPD_N_VONDOCK_TYPUAW_PONSIRI_MOSISIRI_MISOMG
MG+5.5SUBPW_DETN_RST
PRY
PREMTSWMTMG+5SPWR_MGTTHMRTHML
SPBRY
SPARY
HPRY
PRI
PRD
+5MAD_VOLMGMGVRUPVRDN
A-S300
FUNCTION (1) P.C.B.
(Side A)
RM1-RM2-MPSWZPLEDFL_N_CEFL_N_RSTREC
RM1+RM2+REMKEY1_N_INTFL_SCKFL_MOSIMPLED
KEY1+5S
KEY0MG+5M
MG
TRIG
RM2-RM2+
RM1-
RM1+
CDL+I
CDL_I
AGND
CDR+I
CDR_I
AGND
CDL
AGND
CDR
AGND
PHOR
AGND
PHOL
AGND
-15
+15
PHONO_LEDDOCK_LEDTUNER_LEDCD_LEDLINE1_LEDLINE2_LEDLINE3_LEDISAISB+5SMG
+5S_LEDMGCD_SWPD_SWPREMT
MGRDS_RDYRDS\MISOTU_SCLTU_SDARSD_SCKRDS_N_RST
TU_N_TUNED
TU_N_ST
EVOL_MOSI
EVOL_SCK
Z2MT
DOCKRDOCKLAGNDSIRIRSIRILAGNDCDRCDLAGNDPHORPHOL
AGND
CDR+I
CDR-I
SDL+I
CDL-I
-15
-15
+15
+15
FUNCTION (2)
(CB404)
FUNCTION (2)
(CB405)
FUNCTION (3)
(CB602)
FUNCTION (3)
(CB601)
(J model)
DOCK 
(CB302)
OPERATION (1)
(CB2)
MAIN (6)(CB14)
DOCK 
(CB303)
MAIN (1)(W105)
OPERATION (9)(CB853)
OPERATION (5)(W812)
OPERATION (2)(CB802)
OPERATION (2)(W807)
ABCDE FGH I J
1
2
3
4
5
6
7
36A-S500/A-S300
■  PRINTED CIRCUIT BOARDS
A-S500
A-S300 
						

							IC502
IC503 IC501
IC507
FUNCTION (1) P.C.B.
(Side B)
10 0 1
5
4 8
1 5181
80
30 1
432
1
432
31
50
J model
B
A
2
1
POINT  A  XL501 (Pin 13 of IC502)
1 IC502
(+5M)
IC502
(N_RST)2
1 IC502
(+5M)
IC502
(N_RST)2
AC POWER ON
(Connect the power cable)AC POWER ON
(Connect the power cable) AC POWER OFF
(Disconnect the power cable)
POINT  B   1 / IC502 (99 pin, +5M),  2 / IC502 (12 pin, N_RST)
ABCDE FGH I J
1
2
3
4
5
6
7A-S500/A-S300
37
• Semiconductor Location
Ref no. Location
D501 I3
D502 I4
D503 G4
D506 I4
D507 I4
IC501 E3
IC502 H4
IC503 I4
IC507 E3
Q503 F5
Q505 F3
Q506 G4
Q507 E5
Q508 F5
A-S500
A-S300 
						

							CB405
CB404
W401
W602
CB602 CB601
L/R L/R L/R L/R L/R L/RL/R L/R TUNER
1 PB REC PBLINE
2 3 RECPHONO CD
FUNCTION (2) P.C.B.
(Side A)
FUNCTION (3) P.C.B.
(Side A)
DOCKRDOCKLAGNDSIRIRSIRILAGNDCDRCDLAGNDPHORPHOLAGNDCDR+ICDR-ICDL+ICDL-I-15-15+15+15MG
CD+I
CDL-I
AGND
CDR+I
CDR-I
AGND
CDL
AGND
CDR
AGND
PHOR
AGND
PHOL
AGND
-15
+15MGTRIGRM2-RM2+RM1-RM1+
RDS_RDYRDS_MISOTU_SCLTU_SDARDS_SCKRDS_N_RSTTU_N_TUNEDTU_N_STEVOL_MOSIEVOL_SCKZ2MT
CDL_O
TRIGTRIG
CDL+OAGNDAGNDCDR-OCDR+OAGNDAGND
VDR
AGND
VOL
+15
-15
OPERATION (9)
(CB851)
FUNCTION (1)
(CB502)FUNCTION (1)
(CB501)
FUNCTION (1)
(CB515)
(J model)
MAIN (5)(CB5)
(J model)
FUNCTION (1)
(CB510)
ABCDE FGH I J
1
2
3
4
5
6
7
38A-S500/A-S300
• Semiconductor Location
Ref no. Location
Q406 D5
Q407 D5
A-S500
A-S300 
						

							IC401
IC601
FUNCTION (2) P.C.B.
(Side B)
FUNCTION (3) P.C.B.
(Side B)
80 81
3151
50 10 0
14
1 5
8
30
ABCDE FGH I J
1
2
3
4
5
6
7A-S500/A-S300
39
• Semiconductor Location
Ref no. Location
D402 E5
D403 D5
D406 D4
D407 D4
D408 D4
D409 D4
IC401 C4
IC601 H3
A-S500
A-S300 
						

							CB17
CB21IC2 IC3
IC4
CB2
CB16CB7CB6
W1A
W1B
CB4
POWER TRANSFORMER
R model U, C, T, A, B, G, L, J models
OPERATION (1) P.C.B.
(Side A)
PRY
N_RST
PWR_DET
+5.5SUB
MG
WH
WH
+7IIGND
BE WH
1
7 14
8
DOCK 
(W301)
OPERATION (2)(W809A)(W809B)
FUNCTION (1)
(W503)
(J model)
POWER TRANSFORMER
(U, C, R, T, A, B, G, L models)
MAIN (5)
(CB8)
(J model)
AC IN
ABCDE FGH I J
1
2
3
4
5
6
7
40A-S500/A-S300
• Semiconductor Location
Ref no. Location
D13 G5
D24 F3
D26 D3
IC2 G4
IC3 G4
IC4 G5
Q10 G5
Circuit No. U, C, T, A, B, G, L, J R
C12 X O
C14 O XX : NOT USED
O : USED/APPLICABLE
A-S500
A-S300