https://sinclair.wiki.zxnet.co.uk/w/api.php?action=feedcontributions&user=Smogit&feedformat=atomSinclair Wiki - User contributions [en-gb]2024-03-28T09:24:04ZUser contributionsMediaWiki 1.39.6https://sinclair.wiki.zxnet.co.uk/w/index.php?title=ZX_Spectrum_%2B2&diff=1559ZX Spectrum +22015-09-17T09:16:46Z<p>Smogit: </p>
<hr />
<div>[[Category:Spectrum]]<br />
[[Category:Hardware]]<br />
{{Infobox computer<br />
| cpu = [[Z80|Z80A]] @ 3.5469MHz<br />
| rom = 64kB<br />
| ram = 128kB<br />
| rampage = 8×16kB<br />
| manu = Amstrad<br />
| volume = <br />
| resolution = 256×192<br />
| colours = 15 (2 per 8×8 cell)<br />
}}<br />
{{See Also|the early "Grey +2"|the later "Black +2" (+2A and +2B)|ZX Spectrum +3/2A/2B}}<br />
<br />
==Hardware Revisions==<br />
This is an attempt to pin down the various hardware revisions of the +2 Grey. There seem to be three main revisions of the PCB, within these there appear to be separate date coded batches<br />
<br />
===Z70500===<br />
*''Comments:'' Presumably the earliest versions of this board were created prior to the Sinclair takeover<br />
*''Place of manufacture: ''These boards appear to have been manufactured in Taiwan, this is embossed on the underside of the case.<br />
*''Date of manufacture (batch):'' The date code for the PCB batch is recorded on the top right corner on the rear of the PCB in the traces, in this case 32nd Week of 1986: [http://cl.ly/image/2R2Q2G1R1x0c/Screenshot%202015-09-03%2009.17.16.png]<br />
<br />
*''Distinguishing features: ''Fitted with radial capacitors, 2 bodge resistors and a capacitor on the rear of the PCB.<br />
<br />
*''Problems:''<br />
**[http://www.benophetinternet.nl/hobby/vanmezelf/ZX%20Spectrum%20128K%20video%20fixes%20and%20video%20cables.pdfRequires TR4 mod for misplaced transistor.]<br />
** Not only should TR4 be rotated but also TR7. If TR7 is mounted in the false direction then the transistor, which normally acts as an emitter follower, only acts as a diode. The base-collector-diode together with R65 realizes the OR function. But in this case A0 is loaded by 470 Ohm which would be avoided if TR7 would be mounted correct. ([http://www.worldofspectrum.org/forums/discussion/comment/834739/#Comment_834739 Ingo])<br />
<br />
*''Variants:''<br />
Standard 8632 (1986 Week 32)/ 8642 (1986 week 42): Schematic [http://forum.wda-fr.org/download/file.php?id=2442&mode=viewSchematic]<br />
Mid (1987? Week 21): ROM has text rotated on it, date code 8721 [http://rk.nvg.ntnu.no/sinclair/images/plus2_pcb.jpg](image nvg)<br />
<br />
''Serial numbers:''<br />
*A six digit number proceeded by a U<br />
*U-102726: 8632<br />
<br />
''Photos''<br />
*[http://cl.ly/293v1R2j370O/download/Z70500.zip8632]<br />
<br />
===Z70700===<br />
*''Comments:'' Manufactured in the UK once stocks of the toast rack PCB were used up? <br />
*''Place of manufacture: ''These boards appear to have been manufactured in UK, this is embossed on the underside of the case.<br />
*''Date of manufacture (batch):'' The date code for the PCB batch is recorded on the bottom left corner on the PCB in the silkscreen<br />
<br />
*''Distinguishing features: ''Fitted with axial capacitors (excess stock left over from the toast rack?). Lots of small coloured stickers on the modulator and elsewhere in the case.<br />
<br />
''Variants:''<br />
*3886 (1986 Week 38): Bodge resistor on bottom left hand corner of the board (R86?)<br />
*8640 (1986 Week 40): Colour of capacitors change [http://benophetinternet.nl/hobby/vanmezelf/20130605_153957.jpg] (Ben Verstee)<br />
*8645 (1986 Week 45): Colour of capacitors change, different diodes, changes to resistors in bottom left corner of the board [http://www.tomdalby.com/retro/images/+2_inside.jpg] (Tom Dalby)<br />
<br />
''Serial numbers:''<br />
*A six digit number followed by a T, e.g.: <br />
[http://www.worldofspectrum.org/forums/discussion/comment/707209/#Comment_707209003290]: <br />
*005711T: (3886)<br />
*[http://forum.wda-fr.org/viewtopic.php?t=2279012703T]: (8645?) <br />
*[http://www.worldofspectrum.org/forums/discussion/comment/707209/#Comment_707209081526]: <br />
<br />
''Photos''<br />
*[http://cl.ly/2o3b2A1l2326/download/Z70700.zip8686]<br />
*[http://www.worldofspectrum.org/forums/discussion/comment/707209/#Comment_7072098640]<br />
<br />
===0500 (Z70500 is on the rear side)===<br />
*''Comments:'' A later varient of the Z70500 ([http://www.worldofspectrum.org/forums/discussion/comment/823302/#Comment_823302 see also]) possibly originally for the French market, but UK versions also exist. <br />
*''Place of manufacture: '' Taiwan (embossed on bottom of case and PSU sticker).<br />
*''Date of manufacture (batch):'' ? 8641A listed on the front bottom silkscreen of later revisions<br />
<br />
*''Distinguishing features: '' Encased inductor, capacitor colour change, rear-side bodges of Z70500 corrected and paced on the front. [http://www.worldofspectrum.org/forums/discussion/35523/please-test-your-zx128-2-grey-model/p1 Fixed HAL chip.]<br />
<br />
''Variants:''<br />
*UK (1986 Week 37): [[:http://www.tomdalby.com/retro/images/+2_inside_i3.jpg]] (Tom Dalby)<br />
*UK 8641A (1986 week 41): Amstrad 4056 instead of PCF1306P [http://www.nightfallcrew.com/wp-content/gallery/zx-spectrum-2/img_2278.jpg] (nightfall crew)<br />
*France (1986): The modulator and associated components are not fitted, French ROM (40068)[http://mo5.com/commun/images/ordinateurs/sinclair/F_cmspectrumplus2.jpg] (moo5)<br />
<br />
''Serial numbers:''<br />
A six digit number proceeded by a U<br />
*U-091998: 8639 [http://www.worldofspectrum.org/forums/discussion/comment/833728/#Comment_833728]<br />
*U205749: 8641A [http://www.nightfallcrew.com/22/08/2009/sinclair-amstrad-zx-spectrum-2-in-the-grey-case-issue-3sinclair-amstrad-zx-spectrum-2-grigio-issue-3/]<br />
<br />
<br />
''Photos''<br />
*[http://www.nightfallcrew.com/22/08/2009/sinclair-amstrad-zx-spectrum-2-in-the-grey-case-issue-3sinclair-amstrad-zx-spectrum-2-grigio-issue-3/ Nightfall crew]<br />
*[http://www.worldofspectrum.org/forums/discussion/comment/833728/#Comment_833728 MatGubbins]</div>Smogithttps://sinclair.wiki.zxnet.co.uk/w/index.php?title=ZX_Spectrum_%2B2&diff=1558ZX Spectrum +22015-09-17T07:10:30Z<p>Smogit: </p>
<hr />
<div>[[Category:Spectrum]]<br />
[[Category:Hardware]]<br />
{{Infobox computer<br />
| cpu = [[Z80|Z80A]] @ 3.5469MHz<br />
| rom = 64kB<br />
| ram = 128kB<br />
| rampage = 8×16kB<br />
| manu = Amstrad<br />
| volume = <br />
| resolution = 256×192<br />
| colours = 15 (2 per 8×8 cell)<br />
}}<br />
{{See Also|the early "Grey +2"|the later "Black +2" (+2A and +2B)|ZX Spectrum +3/2A/2B}}<br />
<br />
==Hardware Revisions==<br />
This is an attempt to pin down the various hardware revisions of the +2 Grey. There seem to be three main revisions of the PCB, within these there appear to be separate date coded batches<br />
<br />
===Z70500===<br />
*''Comments:'' Presumably the earliest versions of this board were created prior to the Sinclair takeover<br />
*''Place of manufacture: ''These boards appear to have been manufactured in Taiwan, this is embossed on the underside of the case.<br />
*''Date of manufacture (batch):'' The date code for the PCB batch is recorded on the top right corner on the rear of the PCB in the traces, in this case 32nd Week of 1986: [http://cl.ly/image/2R2Q2G1R1x0c/Screenshot%202015-09-03%2009.17.16.png]<br />
<br />
*''Distinguishing features: ''Fitted with radial capacitors, 2 bodge resistors and a capacitor on the rear of the PCB.<br />
<br />
*''Problems:''<br />
**[http://www.benophetinternet.nl/hobby/vanmezelf/ZX%20Spectrum%20128K%20video%20fixes%20and%20video%20cables.pdfRequires TR4 mod for misplaced transistor.]<br />
<br />
*''Variants:''<br />
Standard 8632 (1986 Week 32)/ 8642 (1986 week 42): Schematic [http://forum.wda-fr.org/download/file.php?id=2442&mode=viewSchematic]<br />
Mid (1987? Week 21): ROM has text rotated on it, date code 8721 [http://rk.nvg.ntnu.no/sinclair/images/plus2_pcb.jpg](image nvg)<br />
<br />
''Serial numbers:''<br />
*A six digit number proceeded by a U<br />
*U-102726: 8632<br />
<br />
''Photos''<br />
*[http://cl.ly/293v1R2j370O/download/Z70500.zip8632]<br />
<br />
===Z70700===<br />
*''Comments:'' Manufactured in the UK once stocks of the toast rack PCB were used up? <br />
*''Place of manufacture: ''These boards appear to have been manufactured in UK, this is embossed on the underside of the case.<br />
*''Date of manufacture (batch):'' The date code for the PCB batch is recorded on the bottom left corner on the PCB in the silkscreen<br />
<br />
*''Distinguishing features: ''Fitted with axial capacitors (excess stock left over from the toast rack?). Lots of small coloured stickers on the modulator and elsewhere in the case.<br />
<br />
''Variants:''<br />
*3886 (1986 Week 38): Bodge resistor on bottom left hand corner of the board (R86?)<br />
*8640 (1986 Week 40): Colour of capacitors change [http://benophetinternet.nl/hobby/vanmezelf/20130605_153957.jpg] (Ben Verstee)<br />
*8645 (1986 Week 45): Colour of capacitors change, different diodes, changes to resistors in bottom left corner of the board [http://www.tomdalby.com/retro/images/+2_inside.jpg] (Tom Dalby)<br />
<br />
''Serial numbers:''<br />
*A six digit number followed by a T, e.g.: <br />
[http://www.worldofspectrum.org/forums/discussion/comment/707209/#Comment_707209003290]: <br />
*005711T: (3886)<br />
*[http://forum.wda-fr.org/viewtopic.php?t=2279012703T]: (8645?) <br />
*[http://www.worldofspectrum.org/forums/discussion/comment/707209/#Comment_707209081526]: <br />
<br />
''Photos''<br />
*[http://cl.ly/2o3b2A1l2326/download/Z70700.zip8686]<br />
*[http://www.worldofspectrum.org/forums/discussion/comment/707209/#Comment_7072098640]<br />
<br />
===0500 (Z70500 is on the rear side)===<br />
*''Comments:'' A later varient of the Z70500 ([http://www.worldofspectrum.org/forums/discussion/comment/823302/#Comment_823302 see also]) possibly originally for the French market, but UK versions also exist. <br />
*''Place of manufacture: '' Taiwan (embossed on bottom of case and PSU sticker).<br />
*''Date of manufacture (batch):'' ? 8641A listed on the front bottom silkscreen of later revisions<br />
<br />
*''Distinguishing features: '' Encased inductor, capacitor colour change, rear-side bodges of Z70500 corrected and paced on the front. [http://www.worldofspectrum.org/forums/discussion/35523/please-test-your-zx128-2-grey-model/p1 Fixed HAL chip.]<br />
<br />
''Variants:''<br />
*UK (1986 Week 37): [[:http://www.tomdalby.com/retro/images/+2_inside_i3.jpg]] (Tom Dalby)<br />
*UK 8641A (1986 week 41): Amstrad 4056 instead of PCF1306P [http://www.nightfallcrew.com/wp-content/gallery/zx-spectrum-2/img_2278.jpg] (nightfall crew)<br />
*France (1986): The modulator and associated components are not fitted, French ROM (40068)[http://mo5.com/commun/images/ordinateurs/sinclair/F_cmspectrumplus2.jpg] (moo5)<br />
<br />
''Serial numbers:''<br />
A six digit number proceeded by a U<br />
*U-091998: 8639 [http://www.worldofspectrum.org/forums/discussion/comment/833728/#Comment_833728]<br />
*U205749: 8641A [http://www.nightfallcrew.com/22/08/2009/sinclair-amstrad-zx-spectrum-2-in-the-grey-case-issue-3sinclair-amstrad-zx-spectrum-2-grigio-issue-3/]<br />
<br />
<br />
''Photos''<br />
*[http://www.nightfallcrew.com/22/08/2009/sinclair-amstrad-zx-spectrum-2-in-the-grey-case-issue-3sinclair-amstrad-zx-spectrum-2-grigio-issue-3/ Nightfall crew]<br />
*[http://www.worldofspectrum.org/forums/discussion/comment/833728/#Comment_833728 MatGubbins]</div>Smogithttps://sinclair.wiki.zxnet.co.uk/w/index.php?title=ZX_Spectrum_%2B2&diff=1557ZX Spectrum +22015-09-17T07:09:09Z<p>Smogit: </p>
<hr />
<div>[[Category:Spectrum]]<br />
[[Category:Hardware]]<br />
{{Infobox computer<br />
| cpu = [[Z80|Z80A]] @ 3.5469MHz<br />
| rom = 64kB<br />
| ram = 128kB<br />
| rampage = 8×16kB<br />
| manu = Amstrad<br />
| volume = <br />
| resolution = 256×192<br />
| colours = 15 (2 per 8×8 cell)<br />
}}<br />
{{See Also|the early "Grey +2"|the later "Black +2" (+2A and +2B)|ZX Spectrum +3/2A/2B}}<br />
<br />
==Hardware Revisions==<br />
This is an attempt to pin down the various hardware revisions of the +2 Grey. There seem to be three main revisions of the PCB, within these there appear to be separate date coded batches<br />
<br />
===Z70500===<br />
*''Comments:'' Presumably the earliest versions of this board were created prior to the Sinclair takeover<br />
*''Place of manufacture: ''These boards appear to have been manufactured in Taiwan, this is embossed on the underside of the case.<br />
*''Date of manufacture (batch):'' The date code for the PCB batch is recorded on the top right corner on the rear of the PCB in the traces, in this case 32nd Week of 1986:<br />
[http://cl.ly/image/2R2Q2G1R1x0c/Screenshot%202015-09-03%2009.17.16.png]<br />
<br />
*''Distinguishing features: ''Fitted with radial capacitors, 2 bodge resistors and a capacitor on the rear of the PCB.<br />
<br />
*''Problems:''<br />
[http://www.benophetinternet.nl/hobby/vanmezelf/ZX%20Spectrum%20128K%20video%20fixes%20and%20video%20cables.pdfRequires TR4 mod for misplaced transistor.]<br />
<br />
*''Variants:''<br />
Standard 8632 (1986 Week 32)/ 8642 (1986 week 42): Schematic [http://forum.wda-fr.org/download/file.php?id=2442&mode=viewSchematic]<br />
Mid (1987? Week 21): ROM has text rotated on it, date code 8721 [http://rk.nvg.ntnu.no/sinclair/images/plus2_pcb.jpg](image nvg)<br />
<br />
''Serial numbers:''<br />
*A six digit number proceeded by a U<br />
*U-102726: 8632<br />
<br />
''Photos''<br />
*[http://cl.ly/293v1R2j370O/download/Z70500.zip8632]<br />
<br />
===Z70700===<br />
*''Comments:'' Manufactured in the UK once stocks of the toast rack PCB were used up? <br />
*''Place of manufacture: ''These boards appear to have been manufactured in UK, this is embossed on the underside of the case.<br />
*''Date of manufacture (batch):'' The date code for the PCB batch is recorded on the bottom left corner on the PCB in the silkscreen<br />
<br />
*''Distinguishing features: ''Fitted with axial capacitors (excess stock left over from the toast rack?). Lots of small coloured stickers on the modulator and elsewhere in the case.<br />
<br />
''Variants:''<br />
*3886 (1986 Week 38): Bodge resistor on bottom left hand corner of the board (R86?)<br />
*8640 (1986 Week 40): Colour of capacitors change [http://benophetinternet.nl/hobby/vanmezelf/20130605_153957.jpg] (Ben Verstee)<br />
*8645 (1986 Week 45): Colour of capacitors change, different diodes, changes to resistors in bottom left corner of the board. [http://www.tomdalby.com/retro/images/+2_inside.jpg] (Tom Dalby)<br />
<br />
''Serial numbers:''<br />
*A six digit number followed by a T, e.g.: <br />
[http://www.worldofspectrum.org/forums/discussion/comment/707209/#Comment_707209003290]: <br />
*005711T: (3886)<br />
*[http://forum.wda-fr.org/viewtopic.php?t=2279012703T]: (8645?) <br />
*[http://www.worldofspectrum.org/forums/discussion/comment/707209/#Comment_707209081526]: <br />
<br />
''Photos''<br />
*[http://cl.ly/2o3b2A1l2326/download/Z70700.zip8686]<br />
*[http://www.worldofspectrum.org/forums/discussion/comment/707209/#Comment_7072098640]<br />
<br />
===0500 (Z70500 is on the rear side)===<br />
*''Comments:'' A later varient of the Z70500 ([http://www.worldofspectrum.org/forums/discussion/comment/823302/#Comment_823302 see also]) possibly originally for the French market, but UK versions also exist. <br />
*''Place of manufacture: '' Taiwan (embossed on bottom of case and PSU sticker).<br />
*''Date of manufacture (batch):'' ? 8641A listed on the front bottom silkscreen of later revisions<br />
<br />
*''Distinguishing features: '' Encased inductor, capacitor colour change, rear-side bodges of Z70500 corrected and paced on the front. [http://www.worldofspectrum.org/forums/discussion/35523/please-test-your-zx128-2-grey-model/p1 Fixed HAL chip.]<br />
<br />
''Variants:''<br />
*UK (1986 Week 37): [[:http://www.tomdalby.com/retro/images/+2_inside_i3.jpg]] (Tom Dalby)<br />
*UK 8641A (1986 week 41): Amstrad 4056 instead of PCF1306P [http://www.nightfallcrew.com/wp-content/gallery/zx-spectrum-2/img_2278.jpg] (nightfall crew)<br />
*France (1986): The modulator and associated components are not fitted, French ROM (40068)[http://mo5.com/commun/images/ordinateurs/sinclair/F_cmspectrumplus2.jpg] (moo5)<br />
<br />
''Serial numbers:''<br />
A six digit number proceeded by a U<br />
*U-091998: 8639 [http://www.worldofspectrum.org/forums/discussion/comment/833728/#Comment_833728]<br />
*U205749: 8641A [http://www.nightfallcrew.com/22/08/2009/sinclair-amstrad-zx-spectrum-2-in-the-grey-case-issue-3sinclair-amstrad-zx-spectrum-2-grigio-issue-3/]<br />
<br />
<br />
''Photos''<br />
*[http://www.nightfallcrew.com/22/08/2009/sinclair-amstrad-zx-spectrum-2-in-the-grey-case-issue-3sinclair-amstrad-zx-spectrum-2-grigio-issue-3/ Nightfall crew]<br />
*[http://www.worldofspectrum.org/forums/discussion/comment/833728/#Comment_833728 MatGubbins]</div>Smogithttps://sinclair.wiki.zxnet.co.uk/w/index.php?title=ZX_Spectrum_%2B2&diff=1556ZX Spectrum +22015-09-17T07:08:24Z<p>Smogit: </p>
<hr />
<div>[[Category:Spectrum]]<br />
[[Category:Hardware]]<br />
{{Infobox computer<br />
| cpu = [[Z80|Z80A]] @ 3.5469MHz<br />
| rom = 64kB<br />
| ram = 128kB<br />
| rampage = 8×16kB<br />
| manu = Amstrad<br />
| volume = <br />
| resolution = 256×192<br />
| colours = 15 (2 per 8×8 cell)<br />
}}<br />
{{See Also|the early "Grey +2"|the later "Black +2" (+2A and +2B)|ZX Spectrum +3/2A/2B}}<br />
<br />
==Hardware Revisions==<br />
This is an attempt to pin down the various hardware revisions of the +2 Grey. There seem to be three main revisions of the PCB, within these there appear to be separate date coded batches<br />
<br />
===Z70500===<br />
*''Comments:'' Presumably the earliest versions of this board were created prior to the Sinclair takeover<br />
*''Place of manufacture: ''These boards appear to have been manufactured in Taiwan, this is embossed on the underside of the case.<br />
*''Date of manufacture (batch):'' The date code for the PCB batch is recorded on the top right corner on the rear of the PCB in the traces, in this case 32nd Week of 1986:<br />
[http://cl.ly/image/2R2Q2G1R1x0c/Screenshot%202015-09-03%2009.17.16.png]<br />
<br />
*''Distinguishing features: ''Fitted with radial capacitors, 2 bodge resistors and a capacitor on the rear of the PCB.<br />
<br />
*''Problems:''<br />
[http://www.benophetinternet.nl/hobby/vanmezelf/ZX%20Spectrum%20128K%20video%20fixes%20and%20video%20cables.pdfRequires TR4 mod for misplaced transistor.]<br />
<br />
*''Variants:''<br />
Standard 8632 (1986 Week 32)/ 8642 (1986 week 42): Schematic [http://forum.wda-fr.org/download/file.php?id=2442&mode=viewSchematic]<br />
Mid (1987? Week 21): ROM has text rotated on it, date code 8721 [http://rk.nvg.ntnu.no/sinclair/images/plus2_pcb.jpg](image nvg)<br />
<br />
''Serial numbers:''<br />
*A six digit number proceeded by a U<br />
*U-102726: 8632<br />
<br />
''Photos''<br />
*[http://cl.ly/293v1R2j370O/download/Z70500.zip8632]<br />
<br />
===Z70700===<br />
*''Comments:'' Manufactured in the UK once stocks of the toast rack PCB were used up? <br />
*''Place of manufacture: ''These boards appear to have been manufactured in UK, this is embossed on the underside of the case.<br />
*''Date of manufacture (batch):'' The date code for the PCB batch is recorded on the bottom left corner on the PCB in the silkscreen<br />
<br />
*''Distinguishing features: ''Fitted with axial capacitors (excess stock left over from the toast rack?). Lots of small coloured stickers on the modulator and elsewhere in the case.<br />
<br />
''Variants:''<br />
*3886 (1986 Week 38): Bodge resistor on bottom left hand corner of the board (R86?)<br />
*8640 (1986 Week 40): Colour of capacitors change [http://benophetinternet.nl/hobby/vanmezelf/20130605_153957.jpg] (Ben Verstee)<br />
*8645 (1986 Week 45): Colour of capacitors change, different diodes, changes to resistors in bottom left corner of the board. [http://www.tomdalby.com/retro/images/+2_inside.jpg] (Tom Dalby)<br />
<br />
''Serial numbers:''<br />
*A six digit number followed by a T, e.g.: <br />
[http://www.worldofspectrum.org/forums/discussion/comment/707209/#Comment_707209003290]: <br />
*005711T: (3886)<br />
[http://forum.wda-fr.org/viewtopic.php?t=2279012703T]: (8645?) <br />
[http://www.worldofspectrum.org/forums/discussion/comment/707209/#Comment_707209081526]: <br />
<br />
''Photos''<br />
*[http://cl.ly/2o3b2A1l2326/download/Z70700.zip8686]<br />
*[http://www.worldofspectrum.org/forums/discussion/comment/707209/#Comment_7072098640]<br />
<br />
===0500 (Z70500 is on the rear side)===<br />
*''Comments:'' A later varient of the Z70500 ([http://www.worldofspectrum.org/forums/discussion/comment/823302/#Comment_823302 see also]) possibly originally for the French market, but UK versions also exist. <br />
*''Place of manufacture: '' Taiwan (embossed on bottom of case and PSU sticker).<br />
*''Date of manufacture (batch):'' ? 8641A listed on the front bottom silkscreen of later revisions<br />
<br />
*''Distinguishing features: '' Encased inductor, capacitor colour change, rear-side bodges of Z70500 corrected and paced on the front. [http://www.worldofspectrum.org/forums/discussion/35523/please-test-your-zx128-2-grey-model/p1 Fixed HAL chip.]<br />
<br />
''Variants:''<br />
*UK (1986 Week 37): [[:http://www.tomdalby.com/retro/images/+2_inside_i3.jpg]] (Tom Dalby)<br />
*UK 8641A (1986 week 41): Amstrad 4056 instead of PCF1306P [http://www.nightfallcrew.com/wp-content/gallery/zx-spectrum-2/img_2278.jpg] (nightfall crew)<br />
*France (1986): The modulator and associated components are not fitted, French ROM (40068)[http://mo5.com/commun/images/ordinateurs/sinclair/F_cmspectrumplus2.jpg] (moo5)<br />
<br />
''Serial numbers:''<br />
A six digit number proceeded by a U<br />
*U-091998: 8639 [http://www.worldofspectrum.org/forums/discussion/comment/833728/#Comment_833728]<br />
*U205749: 8641A [http://www.nightfallcrew.com/22/08/2009/sinclair-amstrad-zx-spectrum-2-in-the-grey-case-issue-3sinclair-amstrad-zx-spectrum-2-grigio-issue-3/]<br />
<br />
<br />
''Photos''<br />
*[http://www.nightfallcrew.com/22/08/2009/sinclair-amstrad-zx-spectrum-2-in-the-grey-case-issue-3sinclair-amstrad-zx-spectrum-2-grigio-issue-3/ Nightfall crew]<br />
*[http://www.worldofspectrum.org/forums/discussion/comment/833728/#Comment_833728 MatGubbins]</div>Smogithttps://sinclair.wiki.zxnet.co.uk/w/index.php?title=ZX_Spectrum_%2B2&diff=1555ZX Spectrum +22015-09-17T07:00:32Z<p>Smogit: </p>
<hr />
<div>[[Category:Spectrum]]<br />
[[Category:Hardware]]<br />
{{Infobox computer<br />
| cpu = [[Z80|Z80A]] @ 3.5469MHz<br />
| rom = 64kB<br />
| ram = 128kB<br />
| rampage = 8×16kB<br />
| manu = Amstrad<br />
| volume = <br />
| resolution = 256×192<br />
| colours = 15 (2 per 8×8 cell)<br />
}}<br />
{{See Also|the early "Grey +2"|the later "Black +2" (+2A and +2B)|ZX Spectrum +3/2A/2B}}<br />
<br />
==Hardware Revisions==<br />
This is an attempt to pin down the various hardware revisions of the +2 Grey. There seem to be three main revisions of the PCB, within these there appear to be separate date coded batches<br />
<br />
===Z70500===<br />
*''Comments:'' Presumably the earliest versions of this board were created prior to the Sinclair takeover<br />
*''Place of manufacture: ''These boards appear to have been manufactured in Taiwan, this is embossed on the underside of the case.<br />
*''Date of manufacture (batch):'' The date code for the PCB batch is recorded on the top right corner on the rear of the PCB in the traces, in this case 32nd Week of 1986:<br />
[[:http://cl.ly/image/2R2Q2G1R1x0c/Screenshot%202015-09-03%2009.17.16.png]]<br />
<br />
*''Distinguishing features: ''Fitted with radial capacitors, 2 bodge resistors and a capacitor on the rear of the PCB.<br />
<br />
*''Problems:''<br />
[http://www.benophetinternet.nl/hobby/vanmezelf/ZX%20Spectrum%20128K%20video%20fixes%20and%20video%20cables.pdfRequires TR4 mod for misplaced transistor.]<br />
<br />
*''Variants:''<br />
Standard 8632 (1986 Week 32)/ 8642 (1986 week 42): Schematic [http://forum.wda-fr.org/download/file.php?id=2442&mode=viewSchematic]<br />
Mid (1987? Week 21): ROM has text rotated on it, date code 8721 [[:http://rk.nvg.ntnu.no/sinclair/images/plus2_pcb.jpg]](image nvg)<br />
<br />
''Serial numbers:''<br />
*A six digit number proceeded by a U<br />
*U-102726: 8632<br />
<br />
''Photos''<br />
*[http://cl.ly/293v1R2j370O/download/Z70500.zip8632]<br />
<br />
===Z70700===<br />
*''Comments:'' Manufactured in the UK once stocks of the toast rack PCB were used up? <br />
*''Place of manufacture: ''These boards appear to have been manufactured in UK, this is embossed on the underside of the case.<br />
*''Date of manufacture (batch):'' The date code for the PCB batch is recorded on the bottom left corner on the PCB in the silkscreen<br />
<br />
*''Distinguishing features: ''Fitted with axial capacitors (excess stock left over from the toast rack?). Lots of small coloured stickers on the modulator and elsewhere in the case.<br />
<br />
''Variants:''<br />
*3886 (1986 Week 38): Bodge resistor on bottom left hand corner of the board (R86?)<br />
*8640 (1986 Week 40): Colour of capacitors change [[:http://benophetinternet.nl/hobby/vanmezelf/20130605_153957.jpg]] (Ben Verstee)<br />
*8645 (1986 Week 45): Colour of capacitors change, different diodes, changes to resistors in bottom left corner of the board. [[:http://www.tomdalby.com/retro/images/+2_inside.jpg]] (Tom Dalby)<br />
<br />
''Serial numbers:''<br />
*A six digit number followed by a T, e.g.: <br />
[http://www.worldofspectrum.org/forums/discussion/comment/707209/#Comment_707209003290]: <br />
*005711T: (3886)<br />
[http://forum.wda-fr.org/viewtopic.php?t=2279012703T]: (8645?) <br />
[http://www.worldofspectrum.org/forums/discussion/comment/707209/#Comment_707209081526]: <br />
<br />
''Photos''<br />
*[http://cl.ly/2o3b2A1l2326/download/Z70700.zip8686]<br />
*[http://www.worldofspectrum.org/forums/discussion/comment/707209/#Comment_7072098640]<br />
<br />
===0500 (Z70500 is on the rear side)===<br />
*''Comments:'' A later varient of the Z70500 ([http://www.worldofspectrum.org/forums/discussion/comment/823302/#Comment_823302see also]) possibly originally for the French market, but UK versions also exist. <br />
*''Place of manufacture: '' Taiwan (embossed on bottom of case and PSU sticker).<br />
*''Date of manufacture (batch):'' ? 8641A listed on the front bottom silkscreen of later revisions<br />
<br />
*''Distinguishing features: '' Encased inductor, capacitor colour change, rear-side bodges of Z70500 corrected and paced on the front. [http://www.worldofspectrum.org/forums/discussion/35523/please-test-your-zx128-2-grey-model/p1 Fixed HAL chip.]<br />
<br />
''Variants:''<br />
*UK (1986 Week 37): [[:http://www.tomdalby.com/retro/images/+2_inside_i3.jpg]] (Tom Dalby)<br />
*UK 8641A (1986 week 41): Amstrad 4056 instead of PCF1306P [[:http://www.nightfallcrew.com/wp-content/gallery/zx-spectrum-2/img_2278.jpg]] (nightfall crew)<br />
*France (1986): The modulator and associated components are not fitted, French ROM (40068)[[http://mo5.com/commun/images/ordinateurs/sinclair/F_cmspectrumplus2.jpg]] (moo5)<br />
<br />
''Serial numbers:''<br />
A six digit number proceeded by a U<br />
*U205749: 8641A [http://www.nightfallcrew.com/22/08/2009/sinclair-amstrad-zx-spectrum-2-in-the-grey-case-issue-3sinclair-amstrad-zx-spectrum-2-grigio-issue-3/]<br />
<br />
''Photos''<br />
*[http://www.nightfallcrew.com/22/08/2009/sinclair-amstrad-zx-spectrum-2-in-the-grey-case-issue-3sinclair-amstrad-zx-spectrum-2-grigio-issue-3/ Nightfall crew]</div>Smogit