Sinclair ZX Spectrum Service Manual

Sinclair ZX Spectrum Service Manual
Spectrum For Everyone https://spectrumforeveryone.com/
54
9.18 DIODES
Circuit Reference
Issue 4a
Issue 4b
Issue 5
Issue 6a
Type
D1-D9
1N4148
1N4148
1N4148
1N4148
Signal
D10
NOT USED
NOT USED
NOT USED
NOT USED
D11/D13
1N4148
1N4148
1N4148
1N4148
Signal
D12
NOT USED
NOT USED
NOT USED
NOT USED
D14
NOT USED
NOT USED
NOT USED
NOT USED
D15
BA157
BA157
BA157
BA157
Rectifier
D16
5V1
NOT USED
NOT USED
NOT USED
Zener
D17
-
BA157
BA157
BA157
Rectifier
D18
-
1N4148
1N4148
1N4148
Signal
D19
-
5V1
BZY88C
BZY88C
Zener
9.19 INTEGRATED CIRCUITS
Circuit Reference
Issue 4a, Issue 4b
Issue 5
Issue 6a
Manufacture/Type
IC1(ULA)
6C001-7 (6C011)
6C001E-7
6C001E-7
Ferranti
NOT USED
NOT USED
or SAGA
IC2(CPU)
Z80A/u780
Z80A
NEC/ZILOG
IC3/IC4
74LS157N (MUX)
NOT National
IC5(ROM)
SPECTRUM
NEC/Hitachi
IC6-IC13
4116/416-
3/MN5290-2
4116
150ns
IC14
LM1889
LM1889
National
IC15-IC22
T14532/MSM3732
(48k only)
4532
Texas/OKI
IC23
74LS32N/74AL532
(48k only)
NOT USED
IC24
74LS00N/74AL500
(48k only)
NOT USED
IC25, IC26
74LS157N/74157
(48k only)
NOT USED
NOT National
IC27
NOT USED
ZX84/01
ZX84/01
Mullard
IC28
NOT USED
74LS04
74LS04
Texas

Sinclair ZX Spectrum Specifications

General

Brand	Sinclair
Model	ZX Spectrum
Category	Desktop
Language	English