https://wiki.retrotechcollection.com/index.php?action=history&feed=atom&title=DECpc_LP_DocumentationDECpc LP Documentation - Revision history2026-10-03T08:02:28ZRevision history for this page on the wikiMediaWiki 1.46.0https://wiki.retrotechcollection.com/index.php?title=DECpc_LP_Documentation&diff=21352&oldid=prevJosh: New page from DEC K-MN-SD00000-21-JG00.A service manual, CPU booklets and David Hall's zx.net.nz notes2026-10-01T23:29:48Z<p>New page from DEC K-MN-SD00000-21-JG00.A service manual, CPU booklets and David Hall's zx.net.nz notes</p>
<p><b>New page</b></p><div>'''DECpc LP Documentation''' describes Digital Equipment Corporation's service manual and CPU module booklets for the [[DECpc LP]] range, with the PDF of each.<br />
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== DECpc LP PC Service Maintenance Manual (K-MN-SD00000-21-JG00.A) ==<br />
Written by DEC's MCS Logistics Engineering group in Nijmegen and dated March 1996, 54 pages, order number K-MN-SD00000-21-JG00.A. The file is DEC's electronic edition, made from a word-processor document, so the text is searchable. It covers the 333sxLP, 340dxLP, 425sxLP, 433dxLP, 450d2LP and 466d2LP.<ref name="smm" /><br />
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Contents: 1 product description and models (pp. 11–12); 2 system utilities and BIOS Setup options; 3 service procedures (safety and tools p. 23, cover p. 26, main logic board jumpers p. 28, 450D2LP/466D2LP CPU board jumpers p. 30, memory configurations p. 32, removal of diskette drives, disk tray, main logic board and power supply p. 38, bus expansion board, battery replacement p. 40, drive cabling p. 41); 4 troubleshooting (initial steps p. 43, beep codes p. 44, POST messages p. 45, computer, disk and monitor tables pp. 47–50, QAPlus/FE messages p. 51); 5 device mapping; 6 pass/fail criteria (p. 57); appendices for service notes (empty) and related documentation.<ref name="smm" /><br />
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The manual has line drawings of the components, jumper locations, SIMM sockets and board connections, but it gives no power supply ratings, no schematics and no parts list. Its 450D2LP/466D2LP CPU board jumper table has evident errors (J103 listed for two functions, identical clock settings for 25 MHz and 33 MHz); the CPU module booklets below are the better source. Its product introduction says 2 MB of standard memory, while its memory section says at least 4 MB.<ref name="smm" /><br />
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<pdf width="800" height="500">File:DECpc LP Service Maintenance Manual (K-MN-SD00000-21-JG00.A).pdf</pdf><br />
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Download: [[:File:DECpc LP Service Maintenance Manual (K-MN-SD00000-21-JG00.A).pdf|DECpc LP Service Maintenance Manual (K-MN-SD00000-21-JG00.A).pdf]]<br />
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== CPU module booklets ==<br />
DEC shipped a 16-page CPU specifications booklet with each upgradable model, printed in Taiwan in August 1992. Each covers the module's jumper settings, the vacancy socket for an upgrade processor and the secondary cache sockets.<ref name="cpu" /><br />
* ''DECpc 433dxLP CPU Specifications'', ER-PC743-CA.A02: [[:File:DECpc 433dxLP CPU Specifications (ER-PC743-CA.A02).pdf]]. Jumper table on p. 2.<br />
* ''DECpc 450D2LP CPU Specifications'', ER-PC744-CA.A01: [[:File:DECpc 450D2LP CPU Specifications (ER-PC744-CA.A01).pdf]]<br />
* ''DECpc 466D2LP CPU Specifications'', ER-PC746-CA.A01: [[:File:DECpc 466D2LP CPU Specifications (ER-PC746-CA.A01).pdf]]<br />
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<pdf width="800" height="500">File:DECpc 433dxLP CPU Specifications (ER-PC743-CA.A02).pdf</pdf><br />
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== Not online ==<br />
The service manual lists the ''DECpc 300/400 LP User's Guide'' (ER-PC740-UA), the ''Getting Started Handbook'' (ER-PC700-GA) and the ''DECpc LP Quick Reference Guide'' (EK-A0899-RG).<ref name="smm" /> No copy of these was found. David Hall holds the separate ''DECpc 325/333 sxLP User's Guide'' (ER-PC733-UA.A01).<ref name="zx325" /><br />
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== Pages that cite these documents ==<br />
* [[DECpc LP]] – models, features, memory<br />
* [[DECpc LP General Maintenance]] – cover, jumpers, memory, battery, drives, acceptance test<br />
* [[DECpc LP Troubleshooting Guide]] – beep codes, POST messages, fault tables<br />
* [[DECpc LP Power Supply Service]] – power supply removal, safety<br />
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== References ==<br />
<references><br />
<ref name="smm">Digital Equipment Corporation, ''DECpc LP PC Service Maintenance Manual'', K-MN-SD00000-21-JG00.A, March 1996, title page, contents and pp. 11, 28–32, 61. Source: [https://www.zx.net.nz/mirror/h18000.www1.hp.com/legacysupport/digital/pdf/sd_pclv.pdf zx.net.nz mirror of HP's legacy support file sd_pclv.pdf].</ref><br />
<ref name="cpu">Digital Equipment Corporation, CPU specifications booklets ER-PC743-CA.A02, ER-PC744-CA.A01 and ER-PC746-CA.A01, August 1992, title pages and contents. Sources: [https://vtda.org/docs/computing/DEC/Micros/ER-PC743-CA.A02_DECpc_433dxLP_CPU_Spec.pdf vtda.org] and [https://lastin.dti.supsi.ch/VET/sys/DEC/DECpc-4XXD2-LP/ lastin.dti.supsi.ch].</ref><br />
<ref name="zx325">David Hall, "Digital DECpc 320sxLP/325sxLP", ''zxnet'', last modified 31 May 2024, [https://www.zx.net.nz/computers/dec/decpc-32xsxlp/ zx.net.nz].</ref><br />
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[[Category:Digital Equipment Corporation]]<br />
[[Category:Service Manuals]]</div>Josh