Yamaha AS2000BL, Service Manual

Page: 64 / 90

CB501
IC505
IC501
CB515
IC502
JK501
JK501
CB503
CB524
CB525
CB504
W5002
IC504
CB517
CB519
CB521
CB507
CB509
W5004
W5006
W5003A
W5005A
W5005B
W5009A W5009B
W5007A W5007B
W5003B
CB512
W5008
IC503
A
1
2
3
4
5
6
7
8
9
10
B C D E F G H I J K L M N
A-S2000
64
★
All voltages are measured with a 10M
Ω
/V DC electronic voltmeter.
★ Components having special characteristics are marked
s
and must be replaced
with parts having specifications equal to those originally installed.
★
Schematic diagram is subject to change without notice.
FRONT 1/3
0
0.7
5.1 0.2
4.3
2.1
0
0
0
12.1
5.6
5.8 5.1
5.1
4.4
4.3
3.6
5.1
8.7 5.8 5.8 5.0
5.8
0
0
5.6
2.5
2.6
1.3
1.3
2.5
2.6
2.5
2.5
2.5
5.0
-11.8
-11.8
5.0 5.1
0
5.0 -11.8 0
0
0 0
0 11.9
0
0
12.0
12.0
0 0
11.9 0
0 0
11.9
0 0
0
11.9
11.9 11.9
12.0
12.0 12.0
12.0
-11.9 -11.9 -11.9
0
0
11.9
12.0
-11.9
0
0
11.9
12.0
-11.9
12.0
-11.8
12.0
0
0
5.0
0
0
5.0
12.0
0
11.9
0
11.8
12.0
5.0
5.3
5.3
5.3
-11.8
12.1
5.7
5.7
5.0
5.0
5.3
-11.8
5.0
5.3
-11.8
5.0
0.1 4.6 5.1 5.1 5.1
5.1
5.1
0
0
5.1 4.1 5.1
5.1
4.1 4.8 1.2 5.1
5.1 5.0
0
5.1
5.0
0
5.0
4.6
1.9
0.1
5.0
3.2
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
0
0.8 0.4
0 0
12.1
12.1
0.8 0.6
0
0.1
0
0
0
0
0
0.7
0.7
0.7
0
5.0
1.4
0
0
0
0.2
0
0
5.0
0
4.9
5.1
1.0 5.1
1.3 0
0
5.0
5.0
5.0
0 0 0 0 0 0
0
0
0
0
0
0
2.1
1.6
4.8
2.5
2.5
2.5
0.2
5.0
4.1
0
0
0
0.5 0.3
4.9
0 0
2.1
2.4
0
5.0
5.0
0 0 0
0
5.0 5.0
0
1.0
A-2
1
A-3
2
A-1
MICRO
PROCESSOR
FRONT (1)
FRONT (8)
FRONT (7)
FRONT (5)
FRONT (4)
FRONT (6)
FRONT (3)
FRONT (9)
FRONT (2)
4 1
6 2
COM 3
7 4
5 5
INH 6
V EE 7
GND 8
Vcc 16
2 15
1 14
0 13
3 12
A 11
B 10
C 9
IC501 TC74HC4051AFEL
8-channel analog multiplexer/demultiplexer
Logic
L
evel
Converter
OUT C IN
OUT C IN
A
B
C
INH
COM
0
1
2
3
4
5
6
7
IC503 : LB1641
Motor driver
INPUT LOGIC IN 1
IN 2
VZ
P1 P2 OUT 1 OUT 2 VCC 2 VCC 1
GND
PRE DRIVER
1
3 2 8 10 9 7
4
6
5
IC504 : LC709004A-TLM-E
I/O-expander for microcontroller
Control logic
port 0 I/O buffer
Serial/parallel converter/shift register
I/O control/output register
DIN
VDD
DOUT
VSS
CLK#
CS#
RES#
P00 P07
2 14
15
19
3
4
21
24 17
port 1 I/O buffer
P10 P17
15 8
2
1
3
VOUT
GND
VIN
–
+
IC505 : RH5RE58AA-T1-FA
Voltage regulator
Vref
POINT A-1 XL501 (Pin 23 of IC502) POINT A-2 A-3 1 / Pin 1, 2 / Pin 3 of CB501
1 CB501 +5M
POWER ON POWER OFF
CB501 /RES 2
1
2
POWER ON
IC502 : M38039xxxxx
Single chip 8-bit microprocessor
P6 (8)
A/D
converter
(10)
PWM
(8)
I/O port P6
5 6 7 8 9 10 11 4
3 2
P0 (8)
I/O port P0
50 51 52 53 54 55 56 49
P2 (8)
I/O port P2
(LED drive)
34 35 36 37 38 39 40 33
P5 (8)
INT3
VREF
XIN
Main
clock
input Main
clock
output
Sub-clock
input Sub-clock
output
AVSS
INT00
INT01
INT41 INT1
INT2
INT40
P3 (8)
I/O port P5 I/O port P3
13 14 15 16 17 18 19 57 58 59 60 61 62 63 64 12
P4 (8)
I/O port P4
21 22 23 24 25 28 29 20
SI/O2
(8)
ROM A
MICROPROCESSOR
RAM Clock generating circuit
SI/O1
(8)
D/A
converter
2 (8)
D/A
converter
1 (8)
SI/O3
(8)
P1 (8)
I/O port P1
42 43 44 45 46 47 48 41
X
Y
S
PC L PC H
PS
Timer Y (8) Prescaler Y (8)
Timer Z (16)
Prescaler X (8)
Prescaler 12 (8)
Timer X (8)
Timer 2 (8)
Timer 1 (8)
30 27 26
XCIN
28
XOUT
31
XCOUT
29
VSS
Data bus
32
VCC CNVSS
CNTR0
CNTR1
CNTR2
RESET
Reset input
1
to FUNCTION (1)_W3004
Page 60 K8
to MAIN (2)_W203
Page 63 K6
to MAIN (2)_W204
P
age 63
SPEAKERS
PHONES
OFF
A
B
A+B
TRIM
-6
0
+6
+12
K8
to FUNCTION (2)_W4004
Writing port
Page 61 J6
to FUNCTION (3)_W1
Page 62 C5
PO
WER
indicator
INPUT indicator
CD
TREBLE
+/-
BASS
+/-
BALANCE
L/R
TUNER LINE 1 LINE 2 CD BAL
VOLUME
INPUT
SELECTOR
PHONO MM/MC
AUDIO MUTE
PHONO MAIN
DIRECT
AUDIO
MUTE