Sinclair ZX Spectrum 128 Service Manual

Sinclair ZX Spectrum Service Manual
Spectrum For Everyone https://spectrumforeveryone.com/
39
Resistors (Continued):
Circuit Reference
Value
Rating/Tolerance
Manufacturer/Type
Notes
R128
8K2
R129
1K0
R130, R131
1K5
R132
39K0
R133
56R
R134
75R
R135
8K2
R136
Not used
R137
47R
R138
470R
Transistors:
Circuit Reference
Device
Alternative
Notes
TR1, TR2
Not used
TR3
ZTX313
KSC839
2
TR4
ZTX650
TR5
ZTX213
TR6
ZTX313
TR7
Not used
TR8, TR9
Not used
TR10
BC308B
BC213P/BC558B
TR11-TR13
BC239B
BC184P/BC549B
TR14
ZTX313
5.5 KEYPAD PCB COMPONENTS
Circuit Reference
Value/Description
Rating/Tolerance
Manufacturer/Type
Notes
Capacitors (axial types)
C1
1uf
10V, -10%+80%
Electrolytic
C2, C3
47Pf
25V, 10%
Ceramic
Coils
L1
68Uh
+/-10%
Toko, 348LS – 680K
Connectors
J1, J2
5-way ribbon connector
BURNDY TE-5-5S1V3
J3
5-way connector
Molex, 4494-05-04
Diodes
D1
BZY88C
5V1
Zener
D2
BZY88C
4V3
Zener
Integrated Circuits
IC1
PIC1652
General Instrument
Resistors (1/4W, 5%)
R1, R2
47R
R3
1K0
R4
100K
R5
1K0

Sinclair ZX Spectrum 128 Specifications

General

Brand	Sinclair
Model	ZX Spectrum 128
Category	Desktop
Language	English