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...

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...

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...

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...

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...

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...

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...

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...

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,...