ZX Spectrum +2: Difference between revisions
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*''Comments:'' Presumably the earliest versions of this board were created prior to the Sinclair takeover | *''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. | *''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: [ | *''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: [https://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. | *''Distinguishing features: ''Fitted with radial capacitors, 2 bodge resistors and a capacitor on the rear of the PCB. | ||
*''Problems:'' | *''Problems:'' | ||
**[ | **[https://www.benophetinternet.nl/hobby/vanmezelf/ZX%20Spectrum%20128K%20video%20fixes%20and%20video%20cables.pdf Requires TR4 mod for misplaced transistor.] | ||
** 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. ([ | ** 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. ([https://www.worldofspectrum.org/forums/discussion/comment/834739/#Comment_834739 Ingo]) | ||
*''Variants:'' | *''Variants:'' | ||
Standard 8632 (1986 Week 32)/ 8642 (1986 week 42): Schematic [ | Standard 8632 (1986 Week 32)/ 8642 (1986 week 42): Schematic [https://forum.wda-fr.org/download/file.php?id=2442&mode=viewSchematic] | ||
Mid (1987? Week 21): ROM has text rotated on it, date code 8721 [ | Mid (1987? Week 21): ROM has text rotated on it, date code 8721 [https://rk.nvg.ntnu.no/sinclair/images/plus2_pcb.jpg](image nvg) | ||
''Serial numbers:'' | ''Serial numbers:'' | ||
| Line 36: | Line 36: | ||
''Photos'' | ''Photos'' | ||
*[ | *[https://cl.ly/293v1R2j370O/download/Z70500.zip8632] | ||
===Z70700=== | ===Z70700=== | ||
| Line 47: | Line 47: | ||
''Variants:'' | ''Variants:'' | ||
*3886 (1986 Week 38): Bodge resistor on bottom left hand corner of the board (R86?) | *3886 (1986 Week 38): Bodge resistor on bottom left hand corner of the board (R86?) | ||
*8640 (1986 Week 40): Colour of capacitors change [ | *8640 (1986 Week 40): Colour of capacitors change [https://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 [ | *8645 (1986 Week 45): Colour of capacitors change, different diodes, changes to resistors in bottom left corner of the board [https://www.tomdalby.com/retro/images/+2_inside.jpg] (Tom Dalby) | ||
''Serial numbers:'' | ''Serial numbers:'' | ||
*A six digit number followed by a T, e.g.: | *A six digit number followed by a T, e.g.: | ||
[ | [https://www.worldofspectrum.org/forums/discussion/comment/707209/#Comment_707209003290]: | ||
*005711T: (3886) | *005711T: (3886) | ||
*[http://forum.wda-fr.org/viewtopic.php?t=2279012703T]: (8645?) | *[http://forum.wda-fr.org/viewtopic.php?t=2279012703T]: (8645?) | ||
*[ | *[https://www.worldofspectrum.org/forums/discussion/comment/707209/#Comment_707209081526]: | ||
''Photos'' | ''Photos'' | ||
*[ | *[https://cl.ly/2o3b2A1l2326/download/Z70700.zip8686] | ||
*[ | *[https://www.worldofspectrum.org/forums/discussion/comment/707209/#Comment_7072098640] | ||
===0500 (Z70500 is on the rear side)=== | ===0500 (Z70500 is on the rear side)=== | ||
*''Comments:'' A later varient of the Z70500 ([ | *''Comments:'' A later varient of the Z70500 ([https://www.worldofspectrum.org/forums/discussion/comment/823302/#Comment_823302 see also]) possibly originally for the French market, but UK versions also exist. | ||
*''Place of manufacture: '' Taiwan (embossed on bottom of case and PSU sticker). | *''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 | *''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. [ | *''Distinguishing features: '' Encased inductor, capacitor colour change, rear-side bodges of Z70500 corrected and paced on the front. [https://www.worldofspectrum.org/forums/discussion/35523/please-test-your-zx128-2-grey-model/p1 Fixed HAL chip.] | ||
''Variants:'' | ''Variants:'' | ||
*UK (1986 Week 37): [ | *UK (1986 Week 37): [https://www.tomdalby.com/retro/images/+2_inside_i3.jpg] (Tom Dalby) | ||
*UK 8641A (1986 week 41): Amstrad 4056 instead of PCF1306P [ | *UK 8641A (1986 week 41): Amstrad 4056 instead of PCF1306P [https://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)[ | *France (1986): The modulator and associated components are not fitted, French ROM (40068)[https://mo5.com/commun/images/ordinateurs/sinclair/F_cmspectrumplus2.jpg] (moo5) | ||
''Serial numbers:'' | ''Serial numbers:'' | ||
A six digit number proceeded by a U | A six digit number proceeded by a U | ||
*U-091998: 8639 [ | *U-091998: 8639 [https://www.worldofspectrum.org/forums/discussion/comment/833728/#Comment_833728] | ||
*U205749: 8641A [ | *U205749: 8641A [https://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'' | ''Photos'' | ||
*[ | *[https://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] | ||
*[ | *[https://www.worldofspectrum.org/forums/discussion/comment/833728/#Comment_833728 MatGubbins] | ||