ZX Spectrum+3 schematic.pdf

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RGB PERITEL
ZX Spectrum +3B Schematic
Redrawn by Guesser
Revision 10 − 2016−03−22
GREEN
+12V
+12V
+5V
100uH
8
7
3
5
2
4
NCSYNC
AUDIO
BLUE
+12V
GND
RED
L4
SCHEMATIC FOR MOTHERBOARDS:
Z70835 ISSUE1
For +3B
1
6
R34
L3
+5V
+5V
470
R44
R49
R31−R33
3 * 150
R28−30
3 * 10k
R35−R37
3 * 150
3.9k
100uH
1k
R41
150
Include:
FD−1 Floppy Disc Drive
Notes:
* For ITU System I fit 6.0MHz resonator at X200. For System G substitute 5.5MHz resonator.
IC3
DV0
DV1
DV2
DV3
2 D0
3 D1
15 D2
17 D3
5 NRAS
16 NCRS
4 NWE
1 NOE
DRAM 64k*4
A0 14
A1 13
A2 12
A3 11
A4 8
A5 7
A6 6
A7 10
VCC 9
GND 18
DV4
DV5
DV6
DV7
2 D0
3 D1
15 D2
17 D3
5 NRAS
16 NCRS
4 NWE
1 NOE
IC4
DRAM 64k*4
A0 14
A1 13
A2 12
A3 11
A4 8
A5 7
A6 6
A7 10
IC9
4 B0
5 B1
18 R0
1 R1
2 G0
3 G1
TEA2000
COVO 6
LUMO 7
LUMI 8
RAMP 15
D31
R46
R48
1k
R54
36k
C24
CHRBL 10
C22
330pF
C23
10nF
R52
D35
3.3k
14 P/N
11 VCC
9 GND
C26
100pF
C25
100pF
C49
100
100
100pF
R50
R51
8
C50
100pF
2 BASE
3 COL
9
4 EMM
VCC
C33
O/P 7
6
47pF
X200
33pF
R47
820
R53
4.7k
TR2
BC549
R56
1.5k
C28
100nF
L2
TOKO
7KL PF291
C29
C31
C30
1k
R55
6.8k
TR1
BC558
TR3
BC549
VCC
VIN
GND
UM1233
UHF
D25
D26
D27
2 EAR
1 MIC
3 GND
D30
D33
D29
VCC 9
GND 18
CKEXT
D28
D34
16 NCSYNC
+5V
+
100uF 100nF
100uF
_
LED
14
VCC
14
VCC
14
VCC
+5V
IC15a
5
6
CBLNK 17
X1 12
X2 13
R59
15k
1.5k
R205
0V
IC15b
13
12
0V
+
39k
R203
2.2k
R209
10k
R210
_
C201
2.2k
R201
1uF
10k
R204
820
R200
C200
1uF
R208
1.2k
C37
100nF
C205
10pF
C204
100nF
C202
100nF
D200
D201
TR201
BC549
D202
R76
10k
LED1
0V
R327
560
IC18
74HCT04
GND
7
IC19
74HC14
GND
7
IC20
74HCT00
680 R81
680 R78
680 R77
GND
7
680 R79
680 R80
EXTERNAL DISK DRIVE
LOWER
NC
NC
NC
N_INDEX
NC
N_DRIVE_1
NC
N_MTR_ON
N_DIR_IN
N_STEP
N_WR_DATA
N_WR_GATE
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
UPPER
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
TR200
BC549
+5V
R61
NVRS 97
NVCS 96
BLUE 37
RED 38
NSNC 43
OSC 100
DV0 61
DV1 60
DV2 59
DV3 58
DV4 57
DV5 56
DV6 55
DV7 54
VA0 70
VA1 69
VA2 68
VA3 67
VA4 65
VA5 64
VA6 63
VA7 62
GREEN 39
BRIT 42
NVWE 95
FSC2 44
NRS 99
10k
220
R206
IC15c
+5V
MC1376
C35
10nF
GND
8
R5
R6
IC2
10k
10k
11 VCC
17 NNMI
25 NBUSRQ
27 NM1
18 NHALT
D2
23 NBUSAK
29 GND
0V
26 NRST
EXPANSION CONNECTOR
UPPER
1
2
3
4
5 (slot)
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
D0
D1
D2
D6
D5
D3
D4
NINT (IC2)
NNMI
NHALT
NMRQ (IC2)
NIRQ (IC2)
NRD (IC2)
NWR (IC2)
NC
NWAIT (IC2)
+12V
−12V
NM1 (IC2)
NRFS (IC2)
A8
A10
RESET (IC15e)
10 A0
9 A1
8 A2
7 A3
6 A4
5 A5
4 A6
3 A7
25 A8
24 A9
21 A10
23 A11
2 A12
26 A13
A15
A13
D7
NOE
Z80A−CPU
R2
R1
CLK 6
NWAIT 24
NINT 16
NRD 21
NWR 22
NMRQ 19
NIRQ 20
NRFS 28
A0 30
A1 31
A2 32
A3 33
A4 34
A5 35
A6 36
A7 37
A8 38
A9 39
A10 40
A11 1
A12 2
A13 3
A14 4
A15 5
D0 14
D1 15
D2 12
D3 8
D4 7
D5 9
D6 10
D7 13
10
11
6MHz *
I/P 5
1k
1.5k
2.2uH
L1
R75
10k
D3
88 NINT
83 NRD
82 NWR
81 NMRQ
80 NIRQ
79 NRFS
3 A0
4 A1
5 A2
6 A3
7 A4
8 A5
9 A6
10 A7
20 A8
21 A9
22 A10
23 A11
24 A12
25 A13
26 A14
27 A15
11 MA0
12 MA1
100k
R57
C36
22pF
D1
40077 GATE ARRAY
PRNT 34
BUSY 1
STRB 47
NDRD 35
NDWR 36
NMTR 33
MIC 98
EAR 2
K0 28
K1 29
K2 30
K3 31
K4 32
K5 48
K6 49
K7 50
K8 51
K9 52
GND1
GND2
GND3
GND4
RA14
GICK
BDIR
BC1
K10 53
X1
35.469MHz
C34
22pF
39k
R45
47
D4
87 NZCK
89 NWAIT
VCC1 41
VCC2 91
IC15d
R60
R58
1
6.8k
R202
1M
5.6k
R207
IC10
OSC
IC20d
0V
13
11
12
R38
1.5k
C51
22nF
1 RESET
2 NRD
3 NWR
4 NCS
IC15e
1
2
IC16
765FDC
US1 28
US0 29
FR/STP 37
NRW/SK 39
5 A0
LC/DIR 38
6 D0
7 D1
8 D2
9 D3
HDSEL 27
WE 25
WR_D 30
FT/T0 33
WP/TS 34
RESET
IC18a
1
2
IC15f
3
4
N_TRACK_0
N_WR_PROT
N_RD_DATA
N_HDSEL
IC20a
4
6
5
N_READY
IC18b
3
4
IC18c
5
6
INTERNAL DISC DRIVE
N_INDEX 2
1 GND
3 GND
5 GND
7 GND
9 GND
11 GND
13 GND
15 GND
17 GND
19 GND
21 GND
23 GND
25 GND
KBY1
KBY2
KBY3
KEYBOARD−Y
KBY4
KBY5
KBY11
KBY7
KBY6
KBY9
KBY8
KBY10
DOWN
DOWN
RIGHT
RIGHT
LEFT
COM
COM
COM
LEFT
COM
FIRE
FIRE
IC18d
9
8
N_DRIVE_0 4
NC 6
N_MTR_ON 8
N_DIR_IN 10
N_STEP 12
N_WR_DATA 14
N_WR_GATE 16
N_TRACK_0 18
N_WR_PROT 20
N_RD_DATA 22
N_HDSEL 24
N_READY 26
10 D4
11 D5
12 D6
13 D7
+5V
IC18e
11
10
IC18f
12
13
8
9
10
IC19a
2
1
IC1
85 NRM1
84 NRM2
45 NRS
46 NCS
13 MA2
14 MA3
16 MA4
17 MA5
18 MA6
19 MA7
78 D0
77 D1
76 D2
75 D3
74 D4
73 D5
72 D6
71 D7
IC19b
4
3
14 DRQ
15 NDACK
16 TC
18 INT
26 MFM
32 PS0
31 PS1
36 HDLD
40 VCC
20 GND
IC20b
INDEX 17
READY 35
RD_D 23
RDW 22
WCK 21
CLK 19
SYNC 24
7 RD
9 DATA
8 WND
19 WCK
3 CK1
6 SYNC
1
2
IC19c
6
5
86
94
93
92
15
40
66
90
C27
1uF
R14−R19
6 * 1.5k
R9−R13
5 * 680
IC19d
8
9
D24
D23
UP
UP
0V
1
6
2
7
3
8
4
9
5
1
6
2
7
3
8
4
9
5
IC19e
10
11
C42
0V
JOYSTICK−1
JOYSTICK−2
SED9420
OS1 1
OS2 2
TMO 23
TRG 22
LPF2 17
LPF1 16
OFS 15
CNT 14
CK2 21
CR 20
VDD 24
GND2 13
R83
R84
R85
1M
IC17
R82
7pF
X2
16MHz
C43
PRINTER CONNECTOR
R7
0V
33k
C44
1nF
68k
1.5k
7pF
1k
KEYBOARD−X
D6
KBX6
D7
D8
D9
D10
D11
D12
D13
KBX3
KBX2
KBX1
KBX4
KBX5
KBX7
KBX8
11 CK
1 NRST
D14
D15
KBX11
KBX12
R20−R27
8 * 10k
KBX9
KBX13
KBX10
D16
D17
D18
D19
D20
3 D0
4 D1
7 D2
8 D3
13 D4
14 D5
17 D6
18 D7
IC14
74HCT273 Q0 2
Q1 5
Q2 6
Q3 9
Q4 12
Q5 15
Q6 16
Q7 19
+5V
UPPER
STROBE
D0
D1
D2
D3
D4
D5
D6
D7
NC
BUSY
NC
0V
NC
GND
NC
+5V
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
0V
LOWER
GND
GND
GND
GND
GND
GND
GND
R68−R71
GND
NC
GND
NC
NC
NC
NC
GND
NC
NC
10 IC1
9 IC2
13 ID1
12 ID2
7 GND
4 IB1
5 IB2
OB 6
OC 8
OD 11
+12V
+5V
IC7
256kb ROM
D0 11
D1 12
D2 13
D3 15
D4 16
D5 17
D6 18
D7 19
NOE 22
NCE 20
A14 27
+5V
IC5
D0
D1
D2
D3
2 D0
3 D1
15 D2
17 D3
5 NRAS
16 NCRS
4 NWE
1 NOE
0V
DRAM 64k*4
A0 14
A1 13
A2 12
A3 11
A4 8
A5 7
A6 6
A7 10
+5V
IC20c
3
IC19f
13
12
18 TST1
4 TST2
5 DRQ
10 MFM
11 MIN
12 GND1
R86
+5V
4 * 1k
C46
C45
VCC 20
GND 10
IC12
2 IA
MC1488
OA 3
0V
100nF
47nF 10nF
EXPANSION CONNECTOR
LOWER
1
2
3
4
5 (slot)
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
GND
GND
CKEXT (IC15a)
A0
A1
A2
A3
NC
GND
NOE
NDRD (IC1)
NDWR (IC1)
NMTR (IC1)
NBUSRQ
NRST
A7
A6
A5
A4
NC
BUSACK
A9
A11
0V
A14
A12
+5V
NC
VCC 9
GND 18
0V
GND
NC
NC 1
D4
14 GND
VCC 28
D5
D6
D7
D0 11
D1 12
D2 13
D3 15
D4 16
D5 17
D6 18
D7 19
NOE 22
NCE 20
A14 27
+5V
IC6
2 D0
3 D1
15 D2
17 D3
5 NRAS
16 NCRS
4 NWE
47pF C52
1 NOE
0V
GND 18
0V
R8
1k
DRAM 64k*4
A0 14
A1 13
A2 12
A3 11
A4 8
A5 7
A6 6
A7 10
+5V
+5V
+12V
D21
D22
IC11
28 D0
27 D1
26 D2
25 D3
24 D4
23 D5
22 D6
21 D7
20 BC1
19 BC2
18 BDIR
17 A8
16 NRST
15 CLK
AY−3−8912
IO0 14
IO1 13
IO2 12
IO3 11
IO4 10
IO5 9
IO6 8
IO7 7
ANA 5
ANB 4
ANC 1
VCC 14
VEE 1
R73
100
KEYPAD (AUX)
6
5
4
3
2
DC POWER
1
2
3
4
5
6
C1
100nF
C2
100nF
C3−C7
5 * 100nF
C8
100uF
C9−C12
4 * 100nF
14
VCC
IC8
10 A0
9 A1
8 A2
7 A3
6 A4
5 A5
4 A6
3 A7
25 A8
24 A9
21 A10
23 A11
2 A12
26 A13
256kb ROM
0V
3 OA
6 OB
8 OC
11 OD
IC13
MC1489
IA 1
IB 4
IC 10
ID 13
RA 2
RB 5
RC 9
RD 12
−12V
R74
1k
1
IC15
74HC04
GND
7
VCC 9
C19
1nF
C20
1nF
C21
1nF
C18
1nF
RS232/MIDI
6
5
4
3
2
1
−12V
6.8k
C47
0V
TEST 2
+5V
+5V
VCC 3
GND 6
14 VCC
7 GND
C14
C15
C16
C17
NC 1
14 GND
VCC 28
English
IC7: 40092U
IC8: 40093U
Spanish
IC7: 40094S
IC8: 40101S
R4
100
RESET
R3
4.7k
C13
1uF
220pF 220pF 220pF 220pF
0V
0V

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