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ZX Spectrum +2: Difference between revisions
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{{See Also|the early "Grey +2"|the later "Black +2" (+2A and +2B)|ZX Spectrum +3/2A/2B}} | {{See Also|the early "Grey +2"|the later "Black +2" (+2A and +2B)|ZX Spectrum +3/2A/2B}} | ||
==Hardware Revisions== | |||
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 | |||
===Z70500=== | |||
*''Comments:'' Presumably the earliest versions of this board were created prior to the Sinclair takeover | |||
*''Place of manufacture: ''These boards appear to have been manufactured in Taiwan, this is embossed on the underside of the case. | |||
*''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]] | |||
*''Distinguishing features: ''Fitted with radial capacitors, 2 bodge resistors and a capacitor on the rear of the PCB. | |||
*''Problems:'' | |||
[http://www.benophetinternet.nl/hobby/vanmezelf/ZX%20Spectrum%20128K%20video%20fixes%20and%20video%20cables.pdfRequires TR4 mod for misplaced transistor.] | |||
*''Variants:'' | |||
Standard 8632 (1986 Week 32)/ 8642 (1986 week 42): Schematic [http://forum.wda-fr.org/download/file.php?id=2442&mode=viewSchematic] | |||
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) | |||
''Serial numbers:'' | |||
*A six digit number proceeded by a U | |||
*U-102726: 8632 | |||
''Photos'' | |||
*[http://cl.ly/293v1R2j370O/download/Z70500.zip8632] | |||
===Z70700=== | |||
*''Comments:'' Manufactured in the UK once stocks of the toast rack PCB were used up? | |||
*''Place of manufacture: ''These boards appear to have been manufactured in UK, this is embossed on the underside of the case. | |||
*''Date of manufacture (batch):'' The date code for the PCB batch is recorded on the bottom left corner on the PCB in the silkscreen | |||
*''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. | |||
''Variants:'' | |||
*3886 (1986 Week 38): Bodge resistor on bottom left hand corner of the board (R86?) | |||
*8640 (1986 Week 40): Colour of capacitors change [[:http://benophetinternet.nl/hobby/vanmezelf/20130605_153957.jpg]] (Ben Verstee) | |||
*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) | |||
''Serial numbers:'' | |||
*A six digit number followed by a T, e.g.: | |||
[http://www.worldofspectrum.org/forums/discussion/comment/707209/#Comment_707209003290]: | |||
*005711T: (3886) | |||
[http://forum.wda-fr.org/viewtopic.php?t=2279012703T]: (8645?) | |||
[http://www.worldofspectrum.org/forums/discussion/comment/707209/#Comment_707209081526]: | |||
''Photos'' | |||
*[http://cl.ly/2o3b2A1l2326/download/Z70700.zip8686] | |||
*[http://www.worldofspectrum.org/forums/discussion/comment/707209/#Comment_7072098640] | |||
===0500 (Z70500 is on the rear side)=== | |||
*''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. | |||
*''Place of manufacture: '' Taiwan (embossed on bottom of case and PSU sticker). | |||
*''Date of manufacture (batch):'' ? 8641A listed on the front bottom silkscreen of later revisions | |||
*''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.] | |||
''Variants:'' | |||
*UK (1986 Week 37): [[:http://www.tomdalby.com/retro/images/+2_inside_i3.jpg]] (Tom Dalby) | |||
*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) | |||
*France (1986): The modulator and associated components are not fitted, French ROM (40068)[[http://mo5.com/commun/images/ordinateurs/sinclair/F_cmspectrumplus2.jpg]] (moo5) | |||
''Serial numbers:'' | |||
A six digit number proceeded by a U | |||
*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/] | |||
''Photos'' | |||
*[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] | |||