Yamaha P-250 Service Manual page 88

A B
P-250 BLOCK DIAGRAM （ブロックダイアグラム）
1
CN12
USB
CN10
to MA60-CN4
JK1
JK2
JK3
1MCLK
2
JK4
+3.3D
ASSIGNABLE
FOOT PEDAL
4
JK5
AUX
PEDAL Assembly
3
ASSIGNABLE FOOT PEDAL
4
WHEEL Assembly
PITCH BEND
MODULATION
5
X2
+5D
X1
8.38MHz MK SUB
40 41 +5D
IC1 10,24,35
LKS
64P
CN104
6
CN3
CN1
12P 24P
12P 24P
CN5 CN4
CN1
/E-IC
SCL
SDA
GHD EBUS L
~ F2 # )
(A-1
VR300
CN3 CN2 MIN
9P
12P
9P
7 12P
CN1 CN3
GHD M
~
(G2 C5)
VR200
MIN
LOW-MID
CN2
CN4
4P
12P
4P
12P
CN1 CN3 VR100
MIN
GHD H
(C5 # ~
C7)
8
GHD
Keyboard
P-250
9
A B
C D E
CN6 CN7
DJK
VBUS, D-, D+
CN8 CN8
+3.3D, DGND
+5D
8
IC3
2 6
3 8P
TR1, 2
+3.3D
TR3, 4
IC1 CN5 CN3
5
4 2
1MCLK
1B
1
1A MIDITX
1R
2 TRANSCEIVER
3 HOST
1Z PC/MAC
13 IC2 16P 1D
SELECT
15 MIDIRX
1Y
14 IC13
16
SW1 5, 6
8
+5D
CN1 CN5 +3.3D
AUXPEDAL, /PEDAL IN
CN10 CN19
PJK
3
SOFT
JK10 CN11
SOFT CN6
2
SOSTENUTO
SOSTENUTO
SUSTAIN
JK11
1
SUSTAIN
JK12
CN2
CN1
LCD
16P
CN93 CN92
VR90
CN91
CONTRAST
+3.3D
LED
SW PNR
1,3,9,15,
29,35,41,
43,49,55,
75,81
CN81 CN71
9P 11P SDRAM
64M
9P 11P
CN80 CN70
IC3
LED
SW
86P
PNL
VR30
MIN MAX
SONG BALANCE
X10
8.38MHz
+5D +5D
CN4
40 41 33 GND
10,24,35
LED DRIVER
SDA
BEND
31 13
SWITCH SCAN
MOD SCL
30 14
/E-IC
E-PNS2a
IC10
36
GND
64P
CN101
CN15
CN1
IC2
48P
ROM
WAVE
128M
37,38
VR400 VR500
MAX MIN MAX MIN MAX
PN-EQ
+3.3D
MID HIGH-MID HIGH
MAX
X10
8.38MHz
+5D
40 41 29 30 31 32 33
10,24,35
LED DRIVER
SDA
13
MAX SWITCH SCAN
SCL
14
/E-IC
E-PNS2a IC10
36
64P
CN10
LOW
C D E
F G
DM
+VCC-ADJ
+1.5D
+3.3D
+VCC-INT
(+3.3D)
+3.3D
+3.3D
RESET
X5
RESET
16MHz
3,29,81,134, 21,35,47,59,
IC6 145,150,154,
71,85,97,111,
175
TR3,4 163,183,205
193 155 156
1MCLK
169
RD/WR
93
MAIN CPU
CAS
108
MIDIOUT RAS3L
SH7709S
166 106
PC/MAC
CKE
203
(SH-3) 105
MIDI IN CKIO
172 162
3
DQMLL
89
DQMLU
90
DQMUL
91
DQMUU
AUX PEDAL
199 92
/PEDAL IN
135 PROGWP
157
RD
88
+3.3D
PEDAL IN 1
143
PEDAL IN 2
142
PEDAL IN 3
141
/ROMCS
96
15 39
/SDRAMCS
SOFT 99 1,3,9,14
15 39
201 /DSCS
/SDRAMCS 27,43,49
SOSTENUTO 100
202 19
SUSTAIN
IC14 SDRAM
200
208P
+5D 64M
RD/WR
16
IC22 IC23
20 CAS
17
54P
54P
RAS3L
18
CKE
HPIN 37
IC10 133 CKIO
38
20P
159 /DACIC
116 MUTE
/MUTE
TR1
IC9
115 /SPOFF
20P
TR2
20
+5D
+3.3D
+1.5D
X3 B13
11.2896MHz
VDD3
A12
PLL-AVD
VDD1
RA[0-10, 12, 13]
LRD[0-15]
15 1
HRD[0-15]
MEL01 DATA 25 L+, L-
5
AE7
26
WCLK1 LRCK
AC6 4 DAC
CK128 256FS SCKI
SWP50 B19 7
IC29
64FS BCK
BCLK
D18 6
28P R+, R-
17
IC12 16
9 23,24,28
+3.3A +5A
ESDA AD5
ESCL AE4
/EIC AF4
HMA[0-26] LMA[0-26]
LMD[0-15]
HMD[0-15]
CN14
60P 60P
CN1
IC4 IC2 IC4
48P
48P 48P
ROM
ROM
ROM
WAVE
WAVE WAVE
64M
64M
128M
37,38 37,38 37,38
+3.3D +3.3D +3.3D
WMH WML
F G
H I
IC38
+2
CN9
REG
+5D, DGND to MA60-CN3
IC36
+1.5
+3.3D
REG
+3.3D
+3.3D +3.3D
+3.3D
X1
6MHz
1,3,9,14
27,43,49
11 37
37,38 1,12, 13 14
/DSCS
26 16,35
/ROMCS
24
PROGRAM FLASH
USB
(MASK) ROM
CONTROLLER
ROM 16M
RD
28
64M
D+ 4 IC2
IC40 48P
IC30 D- 3
48P 48P
VBUS 5
+12V
+12V AJK
8
CN24
8
6 7 3 1 OUT1-L
I/V
2 1 2
/MUTE, /SPOFF /MUTE, /SPOFF
AMP
OP AMP
HPIN HPIN
IC35 8P
IC33, 34 +12A, -12A +12A, -12A
+12V, -12V
8P
2 1 5 7
6 7 6 OUT1-R
4
CN500
4
-12V
-12V
JK600
+5A
IC39 IC32
L / MONO
+5
+3.3
+3.3A +12V
REG REG INPUT
R
JK610
POWER
CN1
3P
TRANS CN1
FU60
RE F2
BR
F1
F3
RE
AC CORD
F1
YE
*
YE
CN2
*
The U model is a polarized type.
H I
J K
MV2 HP
MIN MAX
VR20
CN530 CN1
MASTER VOLUME
HPIN
CN20 /MUTEC
8P
/MUTE
HP2
PHONES
8P
CN510
+12A
+12A
JK620
8 4
5,6 7 12 3
L / MONO
IC100 IC200 RY200 OUTPUT
R
2,3 1 13 5
6
4 JK630
-12A
-12A
+12A
/MUTE
+12C
TR700
CN540
18 TR710
IC300
EQ +B
MUTING
20 IC400
CIRCUIT
/MUTEC
-12A
TR720
/SPOFF
CN520
9P
9P
CN6
/MUTE
L
IC3
+12
+12
SPEAKERS
3
REG 1 IC5
RY1 CN5
2 1 15
AGND
L ch R
3
2
-12
-12 POWER
REG 1
AMP
5 16
IC4
R ch
+VCC (AMP)
DB2
9,13 8,12,14
+12
-VCC (AMP) +VCC
/MUTE
TR2-4
-VCC
MA60
MUTING
CIRCUIT
CN3
IC1
3
DB1 2 +5D
+5
REG DGND to DM-CN9
1
CN4
IC2
+3.3 +3.3D
REG DGND to DJK-CN10
D1, 2
TR1, IC2 +B (RELAY)
to AJK-CN540
28CA1-8824689
J K
L
P-250
1
2
3
4
5
6
7
8
P-250
9
L