Yamaha CRX-140 Service Manual page 68

A B C
CRX-040/CRX-140/NS-BP80
MAIN 2/5
1
(G model)
RDS
A
IC251
2
<11.4>
9.6
10.4 <9.4>
<12.0> <3.3>
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
<5.1>
0
5.1 <5.1>
<5.1>
5.1
3.6 <3.3>
0.3 <0>
0
<0>
0.3
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>
<2.0>
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
OUT L
to MAIN (3)_CB703
(CRX-040)
CRX-140
W251
<0>
Page 74 I3 <0>
<0>
to CONNECTOR (1)_CB604
<0>
(CRX-140) <0>
<0> IPOD IN
6
W252
0 <5.1>
IC252
Page 71 L5
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
<0.2> 0
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 B XL252 (Pin 15 of IC267) POINT C XL253 (Pin 11 of IC267)
POINT A XL251 (Pin 13 of IC251)
10
68
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>
IC264
5.3
1.3
5.3
5.3
5.3
1.3
11.8 5.3 IC264
5.3
<11.9> <5.4>
6.0
11.8 5.3
<5.4>
<11.9>
6.0
11.8 5.3
<11.9> <5.4>
6.0
<12.0>
12.3 12.0
5.3
5.4
5.3
IC272
5.4
IC259
5.4
5.3
0.7 0
0
0
5.3 5.4
IC259
5.4 5.4
IC272
5.3
5.3
<12.0>
INPUT
<4.7>
4.7 IC256 4.8
SELECTOR
4.8
4.7
<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
0
4.7
<4.7>
4.7 4.8
4.7 9.5
<9.4>
<4.7>
<4.7>
<4.7> <4.7>
<0>
11.8
9.5
<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>
4.7 IC257
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
0
IC264
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
0 3.3
5.4
12.0 <5.4>
CRX-140
C348
CRX-040 no_use
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
3.3 D 1.9
<1.6>
0 2 1 1.0
1.7 <2.8>
3.3
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>
3.3 <3.0>
0
0 3.3 <3.0>
3.3 3.3 <3.0>
3.3 3.4
1.7 0
EEPROM
3.4 0
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
4.1
3.4
<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>
R407 R408 <0> 0
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
1
RDS-ID/READY 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
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
Feed Back MUTE
3.3 PLIMIT
GAIN0
<3.3> 3.4
GAIN1
0 SLEEPN
MUTEN
3.3
3.3
CKIN
NCDRC0
NCDRC1 SLEEPN
Page 73 L6 Non-Clip
Oscillator MUTEN OTP
PVDDREG 3.3V DRC MUTE
OCP
AVDD Regulator Control
3.4 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
PVDDREG 3 34 GAIN1
AVDD 4 33 GAIN0
INLP 5 32 NCDRC1
6 31
INLM NCDRC0
7 30
VREF CKIN
8 29
INRM CKOUT
9 28
INRP MUTEN
10 27
AVSS 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
0 Port P0 Port P1 Port P2 Port P3 Port P4 Port P5
0 Writing port VCC2 ports
0
<0> 3.3 Internal peripheral functions
Clock generation circuit
3.3 UART or clock synchronous
serial I/O
X IN -X OUT
Timer (16-bit)
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)
IC252: TC7WH125FK Watchdog timer 16 12 5
(Polynomial : X +X +X +1)
(15-bits)
Dual bus buffer
M16C/60 series
A/D converter Memory
Microprocessor core
(10-bits X 26-channels) ROM
SB
G1 1 8 Vcc D/A converter R0H R0L
RAM
R1H R1L USP
(8-bits X 2-channels)
A1 2 7 G2 R2 ISP
R3
INTB
2.9
Y2 3 6 Y1
A0 PC
A1
6.9 FB A1
FB FLG Multiplier
GND 4 5 A2
VCC1 ports
Port P10 Port P9 Port P8 Port P7 Port P6
8 8 8 8 8
IC257: TC74VHCT08AFT
Quad 2-input AND gate
1A 1 14 Vcc
1B 2 13 4B
IC256: R2A15908SP
1Y 3 12 4A
5 input selector 2 ch electronic volume
2A 4 11 4Y
with tone and surround
2B 5 10 3B
2Y 6 9 3A
GND 7 8 3Y
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 5 24
INR1 BASSR2
mute
INL1 6 23 BASSL2
Mono
V–
/Stereo
4
INL2 BASSL1
7 22
INL3 TREL
8 21
Input
selector
INL4 DGND
9 20
+3V VREF FLOUT CIN +3V
Vdda
Vddd
CLOCK INL5 10 19 SDA
PLL
RECOVERY
REFERENCE (57kHz)
(1187.5Hz) Input gain MCU
VOLTAGE
Vssa Vssd I/F
VREF control
57kHz IGOUTL 11 18 SCL
MPXIN BPF DATA mute
ANTIALIASING SMOOTHING RDDA
(SCF) DECODER
FILTER FILTER
0~+20dB
RDCL
/2dB step Volume
VOLINL 12 17 AGND
0~87dB,-∞
RAM
MODE
(128bits)
REF
RST IGOUTR 13 16 REFIN
CLK(4.332MHz) 0~+20dB
/2dB step
RDS-ID RDS-ID/
TEST TEST
DETECT READY
OSC 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)
20 19 18 17 16
Internal data bus
RES RAM (4 kbytes)
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 Vcc 5 11
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。
and must be replaced ● 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