The famous ZX Spectrum from Sinclair Research introduced in 1982
- For more information, see this article's corresponding Wikipedia page: ZX Spectrum.
| This device is in the WorkNeeded:General category because it was flagged as missing general information about the device. The information may be incomplete, using default text, or inaccurate and should be verified with external sources if possible. If you can add or correct information on this page, please feel free to edit it and do so.
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Known Issues
Symptom or Problem Encountered
Causes
Solutions
Disassembly Notes
A Spectrum 48K is easy to disassemble:
Remove the five screws from the back. Carefully open the case then lift the front edge you will see the keyboard connections to the motherboard, ease these connections out because they are easily damaged. Note that if the Keyboard is the original it is likely to be non-functional.
Original Parts
Spectrum motherboard Issue 2.
Sinclair Spectrum issue 2 motherboard capacitors
Note the reversed polarity on the silk screen for capacitor C46.
Capacitor Specifications and Footprint Information
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Qty
|
Capacitance
|
Voltage
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Mount
|
Diameter/Size
|
Height
|
Temp
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Type
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Brand
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Series
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| C25,C28,C44,C47,C50,C65
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6
|
22 µF
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16 V
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Axial
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4.8 mm Dia.
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12 mm
|
85 °C
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Aluminum Electrolytic
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Gelec
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| C27,C46
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2
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1 µF
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50 V
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Axial
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4.8 mm Dia.
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12 mm
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85 °C
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Aluminum Electrolytic
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Gelec
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| C44,C45
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2
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100 µF
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16 V
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Axial
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6.5 mm Dia.
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16 mm
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85 °C
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Aluminum Electrolytic
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Gelec
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Replacement Parts
Spectrum motherboard Issue 2
Replacement Radial Capacitors
| RefDes
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Qty
|
Compatible Part Number
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Order Links
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| C25, C28, C44, C47, C50, C65
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6
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860020372002
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Digikey Mouser
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| C27, C46
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2
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860020672005
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DigiKey Mouser
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| C44, C45
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2
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860010372006
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DigiKey Mouser
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Replacement Axial Capacitors
| RefDes
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Qty
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Compatible Part Number
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Order Links
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| C25, C28, C44, C47, C50, C65
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6
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MAL213835229E3
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Digikey Mouser
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| C27, C46
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2
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105TTA050M
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DigiKey Mouser
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| C44, C45
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2
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107BPA016M
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DigiKey Mouser
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If parts are not available or different selection is preferred, you can use the values in the Original Parts section to perform a parametric search.
Original Parts
Spectrum motherboard Issue 3
Sinclair Spectrum issue 3 motherboard capacitors
Capacitor Specifications and Footprint Information
| RefDes
|
Qty
|
Capacitance
|
Voltage
|
Mount
|
Diameter/Size
|
Height
|
Temp
|
Type
|
Brand
|
Series
|
| C25,C28,C34,C47,C50,C65
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6
|
22 µF
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25 V
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Axial
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4.8mm
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12 mm
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85 °C
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Aluminum Electrolytic
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Philips
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| C27,C46
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2
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1 µF
|
50 V
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Axial
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4.8 mm Dia.
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12 mm
|
85 °C
|
Aluminum Electrolytic
|
Gelec
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|
| C44,C45
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2
|
100 µF
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16 V
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Axial
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6.5 mm Dia.
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16 mm
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85 °C
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Aluminum Electrolytic
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Gelec
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| C74
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1
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4.7 µF
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50 V
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Axial
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4.8 mm Dia.
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12 mm
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85 °C
|
Aluminum Electrolytic
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Philips
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Replacement Parts
Spectrum motherboard Issue 3
If parts are not available or different selection is preferred, you can use the values in the Original Parts section to perform a parametric search.
References
