Korg PA3X, Service Manual, Page: 16 / 125

S
E
L
ISP1761
MX1
TG01
B
U
F
F
E
R
S
2X256Mbit
SDRAM
64Mbit
FX
SDRAM
MA0:21
MD0:31
SDRAM
CTRL
A00:14
DD00:31
CTRL+CS0:3
MEM0_0:1
CS5
CS4 CS
EB0,OE,
RW
A0:13
D0:15
CD16:31
CA1:21
T
F
T
+
T
.P
.
USB
DEV.
PHY.
USBD
BUS
U
S
B
_
IR
Q
M
P
3
_
C
T
R
L
M
ID
I_
IN
/O
U
T
K
E
Y
B
_
IN
/O
U
T
S
P
I1
_
IN
/O
U
T
S
P
I2
_
IN
/O
U
T
CDREQ
CDACK
CA15
C
S
0
-C
S
3
C
S
5
OSC.
C
D
A
C
K
T
G
R
E
Q
SCL
SDA
PANEL_RES
32.768KHz
16MHz
Colpitts
Oscillator
TG01_RESET
L
R
_
S
O
1
2
_
S
O
L
R
_
S
I
M
P
3
_
D
E
C
1
_
L
R
D
M
A
_
R
E
Q
E
B
0
,O
E
,R
W
V
ID
E
O
_
F
P
G
A
_
P
R
G
24.576 MHz
TFT BACKLIGHT
DREQ
TIMING
ADAPTER
V
ID
E
O
I
F
SCL
SDA
+5V
P
A
N
E
L
S
+5V
SCL
SDA
RESET SIGNALS
O
U
T
P
U
T
B
O
A
R
D
CN2
KEYB IF BOARD
GRA0002183
DISPLAY
INTERFACE
GRA0002171
GAIN
MIC
IN
Pa3X 61-keys BLOCK DIAGRAM
Authors: M. Palombini - M. Caldari
Version: 3.0
Date:
27 April 2011
TFT
T
F
T
+
T
.P
.
LED
DRIVER
FPGA LFEC1
V
ID
E
O
I
F
SAA7105
1
M
b
it
S
R
A
M
OSC.
27MHz
+1.2V
REG
+3.3V
+3.3V
REG
+5V
+5V
+3.3V
VIDEO OUT
RST
SDA
SCL
XTI
CVBSO
RST
DM0:16
MA0:15
CTRLs
IC2
IC1
IC5
IC6
IC4
IC3
IC8
XT1
CN4
VIDEO BOARD
GRA0002106
NKS3
K
E
Y
B
I
F
A.T.
BUFF.
2X 3 TO 8
DECODER
KEYB
LOWER
KEYB
UPPER
A.T.
+5V
J1
CN4
IC5
CN1
IC1-2
IC6
IC4
RST
CN3
TX/RX
AN2
RST
MK/BR
P60:67
O
U
T
P
U
T
B
O
A
R
D
OUTPUT BOARD
GRA1002132
+12V
-12V
PRE
AMP
OUTPT
BUFFERS
AND
MUTE
OUTPT
BUFFERS
AND
MUTE
INPUT
BUFFERS
+
L
R
BALANCED
L/R IN
SWA
SWB
SWC
Q1
Q15
Q22
Q26
MIC SENSE
PHANTOM
POWER
HEADPHONES
AMP.
1/2 OUT
L/R OUT
L/R IN JACK6
JACK7
JACK4
JACK5
JACK2
JACK3
IC4
IC1
IC8, IC9
IC7, IC7
IC10
IC13
LEVEL
TRASLATOR
LEVEL
TRASLATOR
PHANTOM_EN
JACK8
VR1
P
A
N
E
L
S
CY8C24423
SW AND LEDs
MATRIX
2X 3 TO 8
DECODER
+
5
V
S
D
A
S
C
L
+5V
R
E
S
E
T
S
IG
N
A
L
S
+
3
.3
V
XRES
VR1-5
RIGHT PANEL BOARD
GRA0002168
LEFT PANEL BOARD
GRA0002167
CY8C24423
SW AND LEDs MATRIX
2X 3 TO 8
DECODER
SDA
SCL
RTC
CR2032
XRES
+3.3V
PWR EN
SDA
SCL
+3.3V
SOUND CONTROL BOARD
GRA0002172
3 switches & 3 LEDs
32.768KHz
SCL
HP_INSERT
AUDIO_RST
MUTE
Mic/IN SEL
MD16:31
MA1:20
MD16:31
MA1:17
+12V
-12V
1/2 OUT
L/R
SPI1 IN/OUT
VIDEO FPGA PRG
RST
TFT BUS
T.P.
MAIN BOARD
GRA0002165
R
E
S
E
T
_
O
U
T
RST
BALANCED
L/R IN
+15VSW
+3.3V
S/PDIF
+15V
MIC_SENSE
M
P
3
_
D
E
C
2
_
L
R
DSP56724
64 Mbit
SDRAM
64 Mbit
SDRAM
LATCH
A
D
0
0
:2
3
AD08:23 AD00:07
A
L
E
A00:22
C
T
R
L
TC_SO
TC_SI
P
B
8
P
B
9
P
B
1
0
P
B
1
1
T
M
S
T
D
I
T
D
O
T
C
K
I2S_CLKs
GP_NCS
TC_RESET
GP_MOSI
GP_CLK
GP_MISO
DC-DC
+3.3V
+3.3VMEM
+15V +VBAT
overcurrent protection
P
a
ss
iv
e
n
e
tw
o
rk
V
I
T
Step
down
converter
+VBAT
+15V
SCL
SDA
Power stage
PWMM
PWMB
C
Y
8
C
2
7
4
4
3
B
A
T
T
E
R
Y
NiMH battery pack
7.2 V - 2100 mAh
N
T
C
XRES
POWER_GOOD
P/I
MAIN FILTER BOARD
GRA0002134
5
1
2
M
B
IT
S
D
R
A
M
5
1
2
M
B
IT
S
D
R
A
M
2
5
6
M
B
IT
S
D
R
A
M
2
5
6
M
B
IT
S
D
R
A
M
5
1
2
M
B
IT
S
D
R
A
M
5
1
2
M
B
IT
S
D
R
A
M
2
5
6
M
B
IT
S
D
R
A
M
2
5
6
M
B
IT
S
D
R
A
M
S
O
D
I
M
M
MEM0_0:1
J1
GRA1002101
CS0 CS1 CS2
CS3
DSP
TMS320
256Mbit
SDRAM
D/A
PCM4104
MX
5010B
LP
FILTER
A/D
PCM4202
LP
FILTER
LP
FILTER
AUDIO_RST
RST
RST
RST
CLKs
CLKs
CLKs
DO
DI
DO
DI0
DI1
A1OUT
AIN
A0OUT
PHANTOM_EN
16Mbit
NOR
CS0
WE
RP
CY8C27443
USB_CS
K
E
Y
B
I
F
OPTO
INS.
ASS. PED.
DAMPER
EC5
MIDI IN
MIDI OUT
MIDI THRU
O.C.
PROT
+5V
H
D
D
IF
O.C.
PROT
+5V
USB REAR
U
S
B
F
R
O
N
T
PHANTOM_EN
AUDIO_RST
HP_INSERT
SCL
SDA
RST_MBOARD
+5V
A.T. ADJ
D+/D-
+5V
+5V
D+/D-
D+/D-
RST
+5V
KEYB IN/OUT
MIDI3
24MHz
MIC_SENSE
MUTE3V
3.3V & 5V
DC/DC
REG
1.8V
LIN REG
+12V
+1.8V
+5V
+3.3V
-15V
DC/DC
REG
-12V
REG
LIN
-12V
+12V
REG
LIN
+15V
M
O
T
O
R
IF
+5VA
+5V
REG
LIN
B
A
T
T
E
R
Y
SDA
SCL
RST_RIBBON
+3.3V
RIBBON CONTROL BOARD
GRA0002169
CY8C20334
TX
14 elements PCB sensor array
SDA
SCL
RST_RIBBON
+3.3V
TX
R
IB
B
O
N
_
T
X
U
A
R
T
3
_
R
X
74LV
1G18
M
P
3
_
S
P
I_
S
E
L
SMPS
RPS-75-15
+15V 5A
MAIN
SW
M
A
IN
P
O
W
E
R
+15V
SOFT_POWER_OUT
STANDBY AND
BATTERY STATUS
SOFT_POWER_IN
CHARGE_STATE
SOFT_POWER_IN
CHARGE_STATE CHARGE_STATE
SOFT_POWER_IN
Boot selection:
MODE0=4 - MODE1=0
IN_ROUTING_SEL
PaAS
AUDIO
PaAS
CONNECTION BOARD
GRA0002174
+1.2V
2x 1.2V
DC/DC
REG
+1.2V
SEL P/I
T
C
_
S
O
I2
S
_
C
L
K
s
T
C
_
S
I
M
P
3
_
E
N
C
_
L
R
+15VSW
JACK1
J1
HP BOARD
GRA0002138
TRANSFORMER
S/PDIF
CONTROL BOARD
GRA0002166
DISPLAY
FRAME
CONTROL
LOGIC
DISPLAY
FRAME
CONTROL
DEMUX
SOFT_POWER_OUT
P
A
N
E
L
S
M
A
IN
B
O
A
R
D
P
O
W
E
R
M
A
IN
B
O
A
R
D
P
O
W
E
R
M
A
IN
P
O
W
E
R
P
a
A
S
P
O
W
E
R
PaAS
POWER
(from Control Board)
TRANSLATOR
MUTE3V
MX1_WCLK
MX1_BCLK
MX1_REC
MX1_PLAY
MP3_SAMPLING
MX1_WCLK
MX1_BCLK
MX1_REC
MX1_PLAY
MP3_SAMPLING
SPKR_ON
+15V +15VAMP
+15V
+VBAT
+15V
+VBAT
+15V
+15VAMP
SPKR_BOX
SPKR_ON
M
A
X
X
_
L
R
_
S
O
MAXX_LR_SO
TC_SPDIF_OUT
SDA
TRANSFORMER
S/PDIF
TC_SPDIF_OUT
SOFT_POWER_OUT
TC_SWITCH_OFF
TC_SWITCH_OFF
SDRAM
CKE
ADAPTER
+3.3V
+3.3V
DISPLAY FRAME
GRA0002170
12 switches
&
4 LEDs
OPTION
OPTION
HDD
HDD
IF
OXU931S
+3.3V
REG
H
H
D
H
D
D
12 MHz
CN3
IC2
IC4
XT1
CN1
+5V
USB TO SATA BOARD
GRA1002157
U
S
B
P
E
N
USB PEN BOARD
GRA0002177
DEFAULT
U
S
B
F
R
O
N
T
FRONT USB BOARD
GRA0002185
CON1
CON2
or