Yamaha CRX-040 Service Manual page 68

Micro component system cd receiver/speaker
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A
B
C
CRX-040/CRX-140/NS-BP80
MAIN 2/5
1
(G model)
RDS
A
IC251
2
<11.4>
10.4
9.6
<9.4>
<3.3>
<12.0>
10.5
<10.1>
<22.0>
<4.0>
<2.9>
<10.1>
<2.3>
10.5
0
3
(U, T, K, G, L, V,
J models)
CB251
0
<5.1>
5.1
<5.1>
5.1
<5.1>
3.6
<3.3>
0.3
<0>
0
0.3
<0>
To FM TUNER
4.7
<5.1>
3.3
<3.0>
(U, T, K, G, L, V, J models)
3.3
<3.0>
9.6
<9.4>
0
<2.0>
0
4
CB252
To DAB TUNER
(A, B models)
(A, B models)
5
C434, 435
R491, 492
L280, 281
CRX-040
no_use
no_use
no_use
CRX-140
100P(SL)
4.7K
BLM18HD102SN1D
CRX-040
Page 71
L3
W255
to MAIN (3)_CB703
OUT L
(CRX-040)
CRX-140
W251
<0>
Page 74
I3
<0>
<0>
to CONNECTOR (1)_CB604
<0>
<0>
(CRX-140)
IPOD IN
<0>
6
W252
0
<5.1>
Page 71
L5
IC252
3.3
0
<5.1>
<3.4>
0
to MAIN (3)_CB702
0
0
(CRX-040)
0
CRX-140
3.3
<0>
0
0
IC252
0
3.3
0
Page 74
E8
<0>
3.3
<3.4>
0
to CONNECTOR (1)_CB603
0
0
0
<0.2>
IC252
(CRX-140)
CRX-140
CRX-040
CRX-140
7
CRX-140
W253
<0>
<3.3>
<2.4>
Page 74
F8
<0>
<0.2>
to CONNECTOR (1)_CB602
<3.4>
(CRX-140)
<0>
<0>
<3.3>
<7.2>
8
CRX-140
9
POINT A XL251 (Pin 13 of IC251)
POINT B XL252 (Pin 15 of IC267)
POINT C XL253 (Pin 11 of IC267)
10
68
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D
E
F
<11.5>
12.0
<4.3>
5.3
5.3
IC262
0
5.3
<4.3>
0
0
<4.3>
5.3
0
IC262
5.3
0
5.3
<4.3>
5.3
IC264
1.3
5.3
5.3
5.3
1.3
IC264
11.8
5.3
5.3
<11.9>
<5.4>
6.0
11.8
5.3
<11.9>
<5.4>
6.0
11.8
5.3
<5.4>
<11.9>
6.0
<12.0>
12.3
12.0
5.3
5.4
5.3
IC272
5.4
IC259
5.4
5.3
0
0.7
0
0
5.3
5.4
5.4
IC259
5.4
IC272
5.3
5.3
<12.0>
INPUT
<4.7>
4.8
4.7
IC256
SELECTOR
4.7
4.8
4.7
<4.7>
4.8
<4.7>
4.7
<4.7>
4.8
4.7
<4.7>
4.8
4.7
<4.7>
4.8
<4.7>
4.7
4.8
4.7
4.8
<4.7>
4.7
0
4.7
3.3
4.7
3.3
4.7
0
<4.7>
4.7
4.8
4.7
9.5
<9.4>
<4.7>
<4.7>
<4.7>
<4.7>
<0>
9.5
11.8
<12.0>
<9.4>
<11.9>
<4.7>
<4.7>
10.2
<10.1>
CRX-140
0
No replacement part available.
サービス部品供給なし
R274
J256
100K
0
no_use no_use
3.3
0
IC260
3.3
0
3.3
0
CRX-040
CD IN
5.1
5.1
3.3
<3.4>
<5.1>
IC257
4.7
3.3
<3.4>
5.1
3.3
<3.4>
<5.1>
0
0
<3.4>
0
(U, T, K, G, L, V, J models)
POINT D 1 / IC267 (99 pin, +3.3M), 2 / IC267 (12 pin, nSYS_RST)
IC267
1
IC267
1
(+3.3M)
(+3.3M)
IC267
2
IC267
2
(nSYS_RST)
(nSYS_RST)
POWER ON
POWER OFF
Key detection for A/D port
Key input (A/D) pull-up resistance 10 k-ohms
G
H
-21.0
0
<-21.1>
<-21.1>
-21.0
0
0
-21.0
<-21.1>
<-21.1>
0
-21.0
2.7
4.3
2.7
4.3
4.3
4.3
No replacement part available.
サービス部品供給なし
4.3
4.3
12.0
IC264
IC264
0
OUT L
12.0
5.4
<15.3>
15.4
0
5.4
D-AMP
3.3
0
1.7
0
1.7
0
0
1.7
0
5.4
<0>
1.7
0
<1.7>
1.7
3.3
0
3.3
5.4
0
3.3
12.0
<5.4>
CRX-140
C348
no_use
CRX-040
CRX-140 100P(SL)
CRX-040
CRX-140
3.6
<3.3>
<0>
3.3
3.3
3.4
B
C
3.3
3.4
<0>
3.3
3.4
3.3
0
1.9
3.3
D
2
1
<1.6>
0
1.0
<2.8>
3.3
1.7
0
<3.3>
0
3.3
2.6
0
0
0
0
IC267
0
0
<3.2>
0
3.3
<3.4>
0
MICROPROCESSOR
0
<3.4>
0
3.3
<3.0>
3.3
<3.0>
0
3.3
3.3
<3.0>
3.3
3.4
1.7
0
EEPROM
0
3.4
0
0
3.4
0
3.4
0
CRX-040
POINT B XL252 (Pin 15 of IC267)
POINT C XL253 (Pin 11 of IC267)
POWER ON
Ohm
0
+ 6.8k
+ 2.7k
+ 5.5k (15k)
+ 18k
V
0 – 0.6
0.7 – 1.6
1.7 – 2.2
2.3 – 2.6
2.7 – 3.1
A/D value (3.3 V = 255)
0 – 51
52 – 131
132 – 176
177 – 206
207 – 237
KEY0 (97 pin)
OPEN/CLOSE
STOP
INPUT
PLAY/PAUSE
I
J
K
<3.4>
<3.3>
<3.4>
<15.2>
SPEAKERS
IC270
3.3
0
3.4
4.1
<3.3>
4.1
<3.3>
<3.1>
<-0.3>
<-0.3>
<2.1>
3.3
<0>
2.2
<0>
<3.3>
3.4
0
<0>
<0>
0
R407
R408
no_use
100K
100K
no_use
0
IC269
CRX-140
CRX-140
<0>
<5.3>
<5.2>
CRX-140
<5.3>
<5.6>
0
5.3
5.3
<5.2>
3.4
3.4
3.4
1.9
1.0
2.6
<1.6>
IC251: LC72725KM-UY-TLM-E
<1.6>
RDS signal demodulation IC
1.9
1.0
2.6
0
0
0
3.4
RDS-ID/READY
1
16
RDCL
RDDA
2
15
RST
3.3
VREF
3
14
XOUT
MPXIN
4
13
XIN
-21.0
Vdda
5
12
Vddd
<-21.3>
Vssa
6
11
Vssd
< > the voltage is CRX-140.
FLOUT
7
10
MODE
CIN
8
9
TEST
<   >内の電圧はCRX-140です。
POINT D 1 / IC267 (99 pin, +3.3M), 2 / IC267 (12 pin, nSYS_RST)
IC267
1
IC267
1
(+3.3M)
(+3.3M)
IC267
2
IC267
2
(nSYS_RST)
(nSYS_RST)
POWER ON
POWER OFF
POWER ON
★ 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.
+ 18k
★ Schematic diagram is subject to change without notice.
2.7 – 3.1
207 – 237
PLAY/PAUSE
L
M
N
MAIN (1)
W254
0
0
0
0
0
0
Page 73
L8
0
0
to SUB (1)_CB802
0
0
0
IC266: YDA147-SZE2
0
Digital audio power amplifier
5.1
5.1
Lch
Feed Back
INLP
Gain
Power
PWM
Level
Logic
Control
Limit
Amp
Shift
INLM
W256
<3.3>
3.4
MUTE
Feed Back
3.3
PLIMIT
GAIN0
<3.3>
3.4
GAIN1
0
SLEEPN
MUTEN
3.3
3.3
CKIN
NCDRC0
SLEEPN
NCDRC1
Page 73
L6
Non-Clip
MUTEN
Oscillator
OTP
PVDDREG
3.3V
DRC
MUTE
OCP
3.4
AVDD
Regulator
Control
Control
to SUB (1)_CB801
UVLO
1.7
VREF/
VREF
3.3
REF
0
3.4
15.4
Feed Back
MUTE
-21.4
INRP
Gain
Power
PWM
Level
Logic
Control
Limit
Amp
Shift
INRM
Feed Back
Rch
NC
1
36
NC
NC
2
35
NC
3
34
PVDDREG
GAIN1
AVDD
4
33
GAIN0
INLP
5
32
NCDRC1
INLM
6
31
NCDRC0
VREF
7
30
CKIN
INRM
8
29
CKOUT
INRP
9
28
MUTEN
AVSS
10
27
PROTN
PLIMIT
11
26
SLEEPN
NC
12
25
NC
CB254
IC267: R5F3640DNFA
Single-chip 16-bit CMOS microprocessor
CB255
<3.3>
3.4
8
8
8
8
8
8
3.3
3.3
Port P0
Port P1
Port P2
Port P3
Port P4
Port P5
0
0
Writing port
VCC2 ports
0
<0>
3.3
Internal peripheral functions
3.3
UART or clock synchronous
Clock generation circuit
serial I/O
Timer (16-bit)
X
IN
-X
OUT
3.3
(6-channels)
X
CIN
-X
COUT
Outputs (timer A): 5
PLL frequency synthesizer
Clock synchronous
On-chip oscillator (125 kHz)
Inputs (timer B): 6
serial I/O
(8 bits x 2 channels)
DMAC
Three-phase motor control circuit
(4 channels)
CRC arithmetic circuit (CCITT)
Watchdog timer
IC252: TC7WH125FK
(Polynomial : X
16
+X
12
+X
5
+1)
(15-bits)
Dual bus buffer
M16C/60 series
Memory
A/D converter
Microprocessor core
(10-bits X 26-channels)
ROM
G1
1
8 Vcc
SB
D/A converter
R0H
R0L
USP
RAM
R1H
R1L
(8-bits X 2-channels)
A1
2
7 G2
R2
ISP
R3
INTB
2.9
Y2
3
6 Y1
A0
A1
PC
6.9
A1
FB
FLG
Multiplier
GND
4
5 A2
FB
VCC1 ports
Port P10
Port P9
Port P8
Port P7
Port P6
IC257: TC74VHCT08AFT
8
8
8
8
8
Quad 2-input AND gate
1A
1
14
Vcc
2
13
1B
4B
IC256: R2A15908SP
1Y
3
12
4A
5 input selector 2 ch electronic volume
2A
4
11
4Y
2B
5
10
3B
with tone and surround
2Y
6
9
3A
GND
3Y
7
8
INR5
1
28
ROUT
IC259, 262, 264, 271, 272 : NJM4580E
Mode selector
INR4
2
27
LOUT
Dual operational amplifier
V+
3
26
8
INR3
TRER
Surround
Input
selector
INR2
4
25
BASSR1
2, 6
1, 7
OUTPUT
–INPUT
+INPUT
3, 5
INR1
5
24
BASSR2
mute
INL1
6
23
BASSL2
Mono
V–
/Stereo
4
INL2
7
22
BASSL1
INL3
TREL
8
21
Input
selector
INL4
DGND
9
20
+3V
VREF
FLOUT
CIN
+3V
Vdda
CLOCK
Vddd
PLL
INL5
10
19
SDA
RECOVERY
REFERENCE
(57kHz)
(1187.5Hz)
VOLTAGE
Input gain
MCU
Vssa
Vssd
control
I/F
VREF
IGOUTL
11
18
SCL
57kHz
MPXIN
BPF
DATA
RDDA
mute
ANTIALIASING
SMOOTHING
(SCF)
DECODER
FILTER
FILTER
0~+20dB
RDCL
VOLINL
/2dB step
Volume
AGND
12
17
0~87dB,-∞
RAM
MODE
(128bits)
13
REF
16
RST
IGOUTR
REFIN
CLK(4.332MHz)
0~+20dB
/2dB step
RDS-ID
RDS-ID/
TEST
TEST
OSC
DETECT
READY
Volume
VOLINR
14
15
VCC
0~87dB,-∞
XIN
XOUT
IC260: MFI341S2164
IC digital
P4/IRQ
Vcc
P3/IRQ
H8/300H
I/O port
P2/IRQ
Vss
MICROPROCESSOR
P1/IRQ
RNG
System control
WDT
FMU
Security logic
Voltage monitoring circuit
Internal address bus
ROM (112 kbytes)
Internal data bus
20
19
18
17
16
RAM (4 kbytes)
RES
NC
1
15
Power-on
P4/IRQ
2
14
EEPROM (16 kbytes + 2 kbytes)
reset circuit
Top view
NC
3
13
Interval timer 1
RES
4
12
Interval timer 2
5
11
Vcc
6
7
8
9
10
On-chip
Modular multiplication
Register
oscillator
coprocessor
(512 bytes)
● 電圧は、内部抵抗 10MΩの電圧計で測定したものです。
● ⚠印のある部品は、安全性確保部品を示しています。部品の交換が必要な場合、
パーツリストに記載されている部品を使用してください。
● 本回路図は標準回路図です。改良のため予告なく変更することがございます。
PVDDPL
OUTPL
PVSSL
OUTML
PVDDML
CKOUT
PROTN
PVDDPR
OUTPR
PVSSR
OUTMR
PVDDMR
NC
P3/IRQ
P1/IRQ
P2/IRQ
Vss

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