Yamaha PortaTone PSR-740 Manual de serviço - Página 9

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Yamaha PortaTone PSR-740 Manual de serviço
HD63266F (XI939A00) FDC (Floppy Disk Controller)
PIN
NAME
I/O
FUNCTION
NO.
1
8"//5"
I
Data transmission speed
2
XTALSET
I
Clock select
3
/RESET
I
Rest
4
E//RD
I
Enable/Read
5
RW//WR
I
Read/write/Write
6
/CS
I
Chip select
7
/DACK
I
DMA acknowledge
8
RS0
I
Register select
9
RS1
I
10
VSS1
Ground
11
VSS2
12
D0
I/O
13
D1
I/O
14
D2
I/O
15
D3
I/O
Data bus
16
D4
I/O
17
D5
I/O
18
D6
I/O
19
D7
I/O
20
/DREQ
O
DMA request
21
/IRQ
O
Interrupt request
22
/DEND
I
Data end
23
VSS3
Ground
24
1/2 EX1
25
VCC1
Power supply
26
NUM1
I
27
NUM3
I
28
IFS
I
Host interface select
29
SFORM
I
Format data
30
/INP
I
Index pulse
31
/READY
I
Ready from FDD
32
/WPRT
I
Write control signal
SED1335F0B (XQ595A00) LCDC (LCD Controller)
PIN
NAME
I/O
FUNCTION
NO.
1
VA5
O
2
VA4
O
3
VA3
O
VRAM address bus
4
VA2
O
5
VA1
O
6
VA0
O
7
/VWR
O
VRAM read/write
8
/VCE
O
Memory control
9
/VRD
-
Not used
10
/RES
I
Initial clear
11
NC
-
Not used
12
NC
-
Not used
13
/RD
I
Read strobe
14
/WR
I
Write strobe
15
SEL2
I
Bus select
16
SEL1
I
Bus select
17
OSC1
I
Clock
18
OSC2
O
Clock
19
/CS
I
Chip select
20
A0
I
Data mode select
21
Vdd
-
Power supply
22
D0
I/O
23
D1
I/O
24
D2
I/O
25
D3
I/O
Data bus
26
D4
I/O
27
D5
I/O
28
D6
I/O
29
D7
I/O
30
XD3
O
Data bus output for 4 bit dot
PIN
NAME
I/O
FUNCTION
NO.
33
/TRKO
I
Track 00 signal
34
/INDEX
I
Index signal
35
/RDATA
I
Read data input from FDD
36
XTAL2
Clock
37
EXTAL2
38
NC
39
XTAL1
Clock
40
EXTAL1
41
VSS4
Ground
42
VSS5
43
NC
44
VCC2
45
VCC3
Power supply
46
VCC4
47
/WGATE
O
Write control
48
/WDATA
O
Writ data to FDD
49
VSS6
Ground
50
/STEP
O
Step signal to control head of FDD
51
/HDIR
O
Direction
52
/HLOAD
O
Head load
53
/HSEL
O
Head select
54
VSS7
Ground
55
/DS0
O
56
/DS1
O
Drive select
57
/DS2
O
58
/DS3
O
59
VSS8
Ground
60
/MON0
O
61
/MON1
O
Motor on
62
/MON2
O
63
/MON3
O
64
VSS9
Ground
PIN
NAME
I/O
FUNCTION
NO.
31
XD2
O
32
XD1
O
Data bus output for 4 bit dot
33
XD0
O
34
XECL
O
S driver enable, chain clock
35
XSCL
O
Data bus shift clock
36
Vss
-
Ground
37
LP
O
X driver latch pulse
38
WF
O
Frame signal for X/Y driver
39
YDIS
O
Power down signal for displaying off mode
40
YD
O
Scan start signal
41
YSCL
O
Scan shift clock
42
VD7
I/O
43
VD6
I/O
44
VD5
I/O
45
VD4
I/O
VRAM data bus
46
VD3
I/O
47
VD2
I/O
48
VD1
I/O
49
VD0
I/O
50
VA15
O
51
VA14
O
52
VA13
O
53
VA12
O
54
VA11
O
VRAM address bus
55
VA10
O
56
VA9
O
57
VA8
O
58
VA7
O
59
VA6
O
60
NC
-
Not used

IC BLOCK DIAGRAM

SN74HCU04NSR (XC723A00)
SN74HC08NSR (XD831A00)
SN74HCU04N (IG142250)
HD74LVC08FP (XU720A00)
Hex Inverter
Quad 2 Input AND
DM:
IC10,16(PSR-740) IC420(PSR-640)
DM: IC15(PSR-740) IC370(PSR-640)
JACK: IC02
1A
1
1
1A
14
VDD
1B
2
2
13
1Y
6A
1Y
3
3
12
2A
6Y
2A
4
4
11
2Y
5A
2B
5
5
10
3A
5Y
2Y
6
6
9
3Y
4A
VSS
7
7
8
Vss
4Y
TC74HC138AF (XM970A00)
SN74HC374ANSR (XQ042A00)
TC74HC138AFEL (XW762A00)
Octal 3-State D-Type Flip-Flop
3 to 8 Demultiplexer
DM: IC18,20(PSR-740) IC430,500(PSR-640)
DM: IC13,19(PSR-740) IC350,510(PSR-640)
OUTPUT
1
1
A
16
Vcc
CONTROL
A
Select
2
B
15
1Q
2
B
Y0
YO
Q
3
D CK
C
Y1
14
1D
3
C
Y1
4
G2A
Y2
13
G2A
Y2
2D
4
D CK
Output
Enable
Q
5
G2B
Y3
12
2Q
5
G2B
Y3
6
G1
Y4
11
G1
Y4
3Q
6
Q
Output
7
Y7
Y5
10
D CK
Y7
Y5
3D
7
Y6
8
GND
9
Y6
4D
8
D CK
Q
4Q
9
GND
10
M5227P (XF751A00)
M5223AFP (XV117A00)
5-Band Graphic Equalizer
M5223AL (XW373A00)
AM: IC210,220
Dual Operational Amplifier
DM: IC33(PSR-740)
MIC: IC100(PSR-740)
47k
1
16
IN1
-Vcc
Output A
1
10k
Inverting
2
2
15
NF1
GND
Input A
-
540
10k
Non-Inverting
3
47k
Input A
3
14
IN2
+Vcc
Ground
4
-V
4
13
NF2
OUT
540
+ -
540
47k
5
12
IN3
-IN
6
11
NF3
+IN
540
47k
47k
540
7
10
IN4
NF5
+ -
8
9
NF4
IN5
540
47k
PSR-740/PSR-640
TC74HC32AF (XN241A00)
Quad 2 Input OR
DM: IC14(PSR-740) IC360(PSR-640)
14
VDD
1A
1
14
Vcc
13
4B
1B
2
13
4B
12
4A
1Y
3
12
4A
11
4Y
2A
4
11
4Y
10
3B
2B
5
10
3B
9
3A
2Y
6
9
3A
8
3Y
GND
7
8
3Y
SN75C1168N (XU463A00)
Line Driver / Receiver
JACK: IC01
20
Vcc
1
1B
16
Vcc
19
8Q
2
15
Q
1A
1D
OE
OE
CK
D
3
18
8D
14
1R
1Y
4
13
CK
D
17
7D
1DE
1Z
OE
OE
Q
16
7Q
5
12
2R
2DE
6
11
Q
15
6Q
2A
2Z
OE
OE
CK
D
7
10
14
6D
2B
2Y
8
13
5D
GND
9
2D
CK
D
OE
OE
Q
12
5Q
11
CLOCK
LB1443N (XF483A00)
LED Driver
MIC: IC001(PSR-740)
+DC Voltage
+V
8
1
2
3
4
5
6
7
8
9
Supply
D1
D2
D3
D4
GND
D5
OUT
IN VCC
7
Output B
+
Inverting
6
+
-
Input B
Non-Inverting
5
Input B
µPC4570HA (XB247A00)
Dual Operational Amplifier
AM: IC320,510
A
B
-
-
1
2
3
4
5
6
7
8
9
+V
-IN
-V
-IN
+V
OUT
+IN
+IN
OUT
A
A
A
B
B
B
19