Yamaha CD-C600, Service Manual

Page: 48 / 64

A
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10
B C D E F G H I J K L M N
CD-C600
48
MAIN 2/2
★
All voltages are measured with a 10MΩ/V DC electronic voltmeter.
★
Components having special characteristics are marked
⚠
and must be replaced
with parts having specifications equal to those originally installed.
★
Schematic diagram is subject to change without notice.
IC305
IC313
JK301
JK302
IC308
IC307
CB308
IC309
IC309
IC309
IC309
IC309 IC301
IC303
CB302
CB301
CB303
CB305
IC306
IC302
IC304
CB311
CB310
CB306
CB304
ANALOG OUT L
ANALOG OUT
0
0
0
5.0
1.7
0
1.7
0
0
0
0
0.3
0
5
4
6
9 8
10
11 12
3
13
1
2
0
0.3
0
1.1
0 3.3
3.3
3.3
3.3
3.3 0.3
0
3.3
3.3
0
3.3
3.3
1.8
3.3
3.4
3.4
1.6
1.2
1.7
1.7
1.7
0
3.4
3.4
3.4
3.3
3.3
3.3
0
0
0
0
0
0
11.9
7.3
5.0
5.0
-5.0
-4.4
2.5
0
2.5
5.0
-5.0
-4.5
3.3
3.3
0
0
0
3.3
3.3
5.0
0
5.0
2.4 11.9
2.4
11.9
2.4 0.5
0
0
0
3.3
3.2
0
3.3
3.3
3.3
0
-4.4
3.3
3.3
3.3
3.3
-4.5
-4.4
-4.5
-4.5
-4.5
5.0
0
0
5.0
2.5
2.5
2.5
0
0
0
3.3
3.3
0
0
0
0.3
0
0
0
3.4
3.4 3.4 3.4 3.4
3.3
3.3 0.2 3.3
3.3
0.3
3.3
3.3 3.3
3.3
3.3 3.3 3.3
3.3 3.3
3.3 3.3 3.3
3.3
0
0 0
3.2 3.2 1.1 0.6
1.7 1.5
3.3
3.3 3.2 3.2
0
0
0 0
0 0
0
0
0
0
0
3.3
3.3
3.3
3.3
3.3
3.3
3.3
3.3
3.2
3.4
0
1.6
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
3.3
3.3
3.3
3.3
3.3
3.3
0.9
0
3.3 3.3 3.3 3.3
3.3 3.3 3.3
0
3.3 3.3 3.3 3.3 3.2 3.2
0 0
0
0.5
0 0 0 0 0 0 0
3.3 3.3 3.3
0 0
3.3 3.3
0
0
0 0
0 0 0 0 0 0
POINT C XL301 (Pin 10 of IC305)
1 IC306
(2 pin)
IC306
(1 pin)
2
1 IC306
(2 pin)
IC306
(1 pin)
2
POWER ON POWER ON POWER OFF
POINT D 1 / IC306 (2 pin), 2 / IC306 (1 pin)
C
2
D
1
Vref
Vout
CT
GND
V
DD
NC
4
1
2
3
5
–
+
IC306 : BD5229G-TR
Voltage detector IC with adjustable output delay
OSC
PWM COMP DRIVER
STBY
STBY
OUT
INV
GND
VCC
TSD
OCP
Error AMP
SS
CTL
LOGIC
IC301 : BD9870FPS-E2
High stand voltage 1 channel step-down switching regulator
VREF
1
5
FIN
4
2
Power Supply
Enhanced
Multilevel
Delta Sigma
Modulator
V
OUT
L
Oversampling
Digital
Filter
With
Function
Control
Audio
4/8
Serial
Port
BCK
LRCK
DATA
Serial
Control
Port
Zero Detect
(TEST)
SCK
System
Clock
Manager
MC (DEMP1)
MS (DEMP0)
Output Amp
and
Low Pass Filter
MD (MUTE)
DAC
V
COM
System Clock
AGND
V
CC
ZEROR/ZEROA
(1)
(ZEROA)
ZEROL/NA
(1)
Output Amp
and
Low Pass Filter
DAC
V
OUT
R
(FMT)
(1) Open-drain output for thePCM1782
NOTE: Signal names in parentheses ( ) are for the PCM1781.
ZEROR/ZEROA
V
OUT
L
V
OUT
R
V
COM
AGND
V
CC
NC
NC
16
15
14
13
12
11
10
9
ZEROL/NA
MS
MC
MD
SCK
DATA
BCK
LRCK
1
2
3
4
5
6
7
8
IC302 : PCM1780DBQR
Audio digital-to-analog converter
V
DD
CE
Pin No.
1
2, 5
3
4
6
Symbol
V
OUT
GND
CE
NC
V
DD
Description
Output Pin of Voltage Regulator
Ground Pin
Chip Enable Pin
No Connection
Input Pin
Vref
6 1
3 2,5
Current Limit
V
OUT
GND
IC303 : R1172S331B-E2-F
CMOS-based positive-voltage regulator IC
1
3
2
5
4
GND
V
CC
IC313 : TC7SH08FU
2-input AND gate
IN A
IN B
OUT Y
IC304 : LE24C023M-TLM-E
Two wire serial interface EEPROM
Write controller
WP
SCL
SDA
8 NC
NC
NC
GND
1
7 2
6 3
5 4 SDA
SCL
WP
VDD
I/O Buffer
Input Buffer
Condition detector
Serial controller
Address generator
X decoder
High voltage generator
Y decoder and Sense AMP
Serial-Parallel converter
EEPROM Array
IC305 : R5F212CASNFP
Single chip 16 bit microprocessor
R0H
Timers
Port P0
8
Port P6
8
Port P7
8
Port P8
8
Port P9
4
8 8 8 3 2 8
Port P1 Port P2 Port P3 Port P4 Port P5
System clock
generation circuit
XIN-XOUT
High-speed on-chip oscillator
Low-speed on-chip oscillator
XCIN-XCOUT
UART or
clock synchronous serial I/O
(8 bits x 3)
I
2
C bus or SSU
(8 bits x 1)
LIN module
Watchdog timer
(15 bits)
A/D converter
(10 bits x 20 channels)
D/A converter
(8 bits x 2)
Timer RA (8 bits x 1)
Timer RB (8 bits x 1)
Timer RC (16 bits x 1)
Timer RD (16 bits x 2)
Timer RE (8 bits x 1)
Timer RF (16 bits x 1)
R8C/Tiny Series microprocessor core Memory
I/O ports
Peripheral functions
R0L
R1H R1L
R2
SB
INTB
PC
USP
ISP
FLG
ROM (1)
RAM
(2)
Multiplier
NOTES:
1. ROM size varies with MCU type.
2. RAM size varies with MCU type.
R3
A0
A1
FB
DIN1 DOUT1
RIN1 ROUT1
DIN2 DOUT2
RIN2 ROUT2
11
10
12
9
14
7
13
8
IC307 : MAX3232CDWR
3-V to 5.5-V multi-channel RS-232 line driver/receiver
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
C1+
V+
C1-
C2+
C2-
V-
DOUT2
RIN2
VCC
GND
DOUT1
RIN1
ROUT1
DIN1
DIN2
ROUT2
IC309 : TC74VHC126FT
Quad bus buffer
1 1G
2 1A
3 1Y
4 2G
5 2A
6 2Y
7
14
13
12
11
10
9
8 GND
Vcc
4G
4A
4Y
3G
3A
3Y
inputs outputs
G Y
L Z
H L
H
A
X
L
H H
Key detection for A/D port
Key input (A/D) pull-up resistance 10 k-ohms
Ohm 0 + 820 + 3.3 k + 12.0 k
V 0 0.2 – 0.3 0.9 – 1.0 2.0 – 2.1
A/D value (3.3V=255) 0 15 – 25 70 – 78 153 – 162
KEY0 (58 pin) – PLAY X CHANGE STOP SKIP +/
KEY1 (59 pin) – SKIP -/SEARCH - PURE DIRECT DISC 5
Ohm 0
V 0
A/D value (3.3V=255) 0
KEY_O/C (54 pin) OPEN/CLOSE
KEY_USB (55 pin) CD/USB
KEY_PLAY (56 pin) PLAY/PAUSE
Ohm 0 + 100 + 3.3 k + 6.8 k + 22.0 k
V 0 0.03 – 0.1 0.8 – 0.9 1.65 – 1.75 2.45 – 2.55
A/D value (3.3V=255) 0 3 – 7 60 – 70 125 – 135 190 – 200
KEY2 (60 pin) – DISC 4 DISC 3 DISC 2 DISC 1
MICROPROCESSOR
EEPROM
DC/DC CONVERTER
AUDIO DAC
232C DRIVER
SW BUFFER
RS-232C
IN
REMOTE
CONTROL
OUT
DIGITAL
OUT
OPTICAL
RESET IC
to OPERATION (11)_CB807
Page 52 L5
to OPERATION (10)_CB851
Page 52 K2
to OPERATION (8)_CB509
Page 50 L4
to OPERATION (1)_CB702
Page 49 B5
to OPERATION (9)_CB601
(Writing port)
Page 51 B5