Yamaha CD-C600 Service Manual page 48

A B C
CD-C600
MAIN 2/2
1
2
DC/DC CONVERTER
11.9 2.4
3
IC301
2.4
4
CB301 0
11.9
7.3
0
5
0
Page 52 L5
5.0
to OPERATION (11)_CB807 5.0
0
-5.0
-4.4
3.3
-4.4
6 0
to OPERATION (10)_CB851
3.3
3.3
-4.5
-4.4 -4.5
-4.5 -4.5
7
ANALOG OUT L
0
2.5
0
2.5
Page 51 B5
5.0
to OPERATION (9)_CB601
-5.0
-4.5
CB303
8
IC301: BD9870FPS-E2
IC302: PCM1780DBQR
High stand voltage 1 channel step-down switching regulator Audio digital-to-analog converter
VCC
1
BCK
Audio
LRCK
Serial
DATA Port
VREF
PWM COMP DRIVER
9
Oversampling
(FMT)
OSC
MS (DEMP0) Function
STBY Serial Control
Control
5 MC (DEMP1)
STBY Port
CTL MD (MUTE)
LOGIC OUT
2
TSD OCP (TEST)
System Clock
System
SCK
INV Clock
Error AMP
Manager
4
SS
FIN
GND
10
★ 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.
48
D E F
0
1.7
3.3
3.3
5.0 3.3
IC303
5.0 3.3
3.3
0 0
0
5.0 3.3
3.3
3.2
0
3.3
CB302
Page 52 K2
3.3
3.3
3.3
3.3
EEPROM
0
0
0
2.5
3.4
2.5
3.4
2.5 1.6
0 1.2
5.0 1.7
1.7
ANALOG OUT CB305
1.7
(Writing port)
AUDIO DAC
POINT C XL301 (Pin 10 of IC305)
IC306
V OUT L
Output Amp
DAC and (2 pin)
Low Pass Filter
4/8
Enhanced
Digital
Multilevel
Filter V IC306
Delta Sigma COM
With
Modulator
(1 pin)
Output Amp
DAC and
Low Pass Filter V R
OUT
Zero Detect Power Supply
IC303: R1172S331B-E2-F
ZEROL/NA 1 16 ZEROR/ZEROA
CMOS-based positive-voltage regulator IC
MS 2 15 V OUT L
MC 3 14 V R
OUT
MD 4 13 V
COM
V DD 6
SCK 5 12 AGND
DATA V
6 11 CC
BCK 7 10 NC
LRCK 8 9 NC
(1) Open-drain output for thePCM1782
NOTE: Signal names in parentheses ( ) are for the PCM1781. Vref
Current Limit
CE 3
G H
Page 49 B5
to OPERATION (1)_CB702
0
0
3.3
0
0
1.6 0
MICROPROCESSOR
0 0
0
0
0 0
3.3
0
IC305
0.9
0
0
0
0 3.3
0 3.3
0 0
3.3 3.3
3.3 C 0
3.2 3.3
3.3
3.4
3.3
3.4
3.4
3.4
Key detection for A/D port
Key input (A/D) pull-up resistance 10 k-ohms
RESET IC
A/D value (3.3V=255)
IC306 2
3.3 1.8
3.3 3.3
A/D value (3.3V=255)
3.3 D
0
3.3
0
A/D value (3.3V=255)
1
KEY_O/C (54 pin)
KEY_USB (55 pin)
KEY_PLAY (56 pin)
POINT D 1 / IC306 (2 pin), 2 / IC306 (1 pin)
1 IC306 1
(2 pin)
IC306
2 2
(1 pin)
POWER ON POWER OFF POWER ON
IC304: LE24C023M-TLM-E
Two wire serial interface EEPROM
WP
Write controller High voltage generator
1 V OUT
SCL
EEPROM Array
Pin No. Symbol Description
1 V Output Pin of Voltage Regulator
OUT
2, 5 GND Ground Pin
2,5 GND
3 CE Chip Enable Pin NC
Y decoder and Sense AMP NC
4 NC No Connection
NC
6 V DD Input Pin
SDA GND
Serial-Parallel converter
I J K
Page 50 L4
to OPERATION (8)_CB509
0 0
SW BUFFER
0 0
0.3
IC309
0 0 4
0 0
0.3 6 5
IC309
1
0 0
2 3 10
IC309
1.1 0
8 9
0.3
IC309
3.3 13 0
11
12
IC309
3.3
0
3.3 0
3.3
3.3
0.3
0
3.3
3.3
3.3
IC313
3.3
0
Ohm 0 + 820 + 3.3 k + 12.0 k
V 0 0.2 – 0.3 0.9 – 1.0 2.0 – 2.1
0 15 – 25 70 – 78 153 – 162
KEY0 (58 pin) – PLAY X CHANGE STOP SKIP +/SEARCH +
KEY1 (59 pin) – SKIP -/SEARCH - PURE DIRECT DISC 5
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
0 3 – 7 60 – 70 125 – 135 190 – 200
KEY2 (60 pin) – DISC 4 DISC 3 DISC 2 DISC 1
Ohm 0
V 0
0
OPEN/CLOSE
CD/USB
PLAY/PAUSE
IC313: TC7SH08FU
IC309: TC74VHC126FT
Quad bus buffer 2-input AND gate
1G 1 14 Vcc
IN B 1 5 V
1A 2 13 4G
1Y 3 12 4A IN A 2
inputs outputs
2G 4 11 4Y
G A Y
GND 3 4
2A 5 10 3G
L X Z
3A
2Y 6 9
H L L
GND 7 8 3Y
H H H
IC306: BD5229G-TR IC307: MAX3232CDWR
Voltage detector IC with adjustable output delay
3-V to 5.5-V multi-channel RS-232 line driver/receiver
V
DD
2
C1+ 1 16 VCC
V+ 2 15 GND
1 Vout
C1- 3 14 DOUT1
C2+ 4 13 RIN1
– 5 12
C2- ROUT1
+
V- 6 11 DIN1
1 8 VDD
Vref
7 10
2 7 WP DOUT2 DIN2
4 NC
3 6 SCL
8 9
RIN2 ROUT2
4 5 SDA
3 5
GND CT
L M N
0
5.0
DIGITAL
OPTICAL
OUT
1.7
232C DRIVER
IC307
RS-232C
CB308
REMOTE
CONTROL
JK301
IN
IC308 0
3.3
0
JK302
3.3
0
0
OUT
0
IC305: R5F212CASNFP
Single chip 16 bit microprocessor
8 8 8 8 3 2 8
I/O ports Port P0 Port P1 Port P2 Port P3 Port P4 Port P5
CC
Peripheral functions
UART or
System clock
clock synchronous serial I/O generation circuit
(8 bits x 3)
Timers
XIN-XOUT
OUT Y
High-speed on-chip oscillator
Timer RA (8 bits x 1) 2 C bus or SSU
I Low-speed on-chip oscillator
Timer RB (8 bits x 1) (8 bits x 1)
XCIN-XCOUT
Timer RC (16 bits x 1)
Timer RD (16 bits x 2)
Timer RE (8 bits x 1)
Timer RF (16 bits x 1) LIN module
Watchdog timer
(15 bits)
A/D converter
(10 bits x 20 channels)
D/A converter R8C/Tiny Series microprocessor core Memory
(8 bits x 2)
11 14
R0H R0L SB ROM (1)
DIN1 DOUT1
R1H R1L
USP
R2
ISP
10 7 R3
DIN2 DOUT2 RAM (2)
INTB
A0
PC
A1
12 13
ROUT1 RIN1 FB FLG
Multiplier
9 8
ROUT2 RIN2
NOTES:
1. ROM size varies with MCU type.
2. RAM size varies with MCU type.