Editing Amstrad DMP3000

{{Infobox computer peripheral
| name         = Amstrad DMP3000
| image        = [[File:Amstrad DMP3000.jpg|260px|frameless]]
| caption      = DMP3000 in its cream case
| manufacturer = Amstrad plc
| type         = 9-pin impact dot-matrix printer
| release_date = 1986
| interface    = Centronics-compatible parallel
| compatible   = Amstrad PC and CPC computers and other computers with a Centronics port
| power        = 220–240&nbsp;V AC 50&nbsp;Hz
| dimensions   = 400 × 250 × 100&nbsp;mm
| weight       = 4.2&nbsp;kg
| model        = DMP3000; DMP3160 (160&nbsp;cps version)
}}
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The '''Amstrad DMP3000''' is a 9-pin impact dot-matrix printer from Amstrad, a later model than the [[Amstrad DMP2000]]. It prints at 105 characters per second in draft and 26 in near letter quality, adds italics, and was sold as "PC compatible", with IBM character sets selectable alongside the Epson FX sets. Amstrad's user manual is dated 1986, with a second edition in 1987, and also covers the faster DMP3160.<ref name="uidmp3000">Amstrad plc, ''DMP3000 / DMP3160 / DMP3250DI PC Compatible Dot Matrix Printer'' user manual, © 1986, second edition 1987. Hosted as [[:File:Amstrad DMP3000 DMP3160 DMP3250di User Manual.pdf]], described at [[Amstrad DMP3000 User Manual]]. Introduction (safety notes, publication details); chapter 1 (mains plug, print head stabilisers, ribbon, self test); chapter 2 (DIP switches DS1-7 and DS1-8); chapter 7 (technical specification, interface, DIP switch functions).</ref> Amstrad's combined service manual gives one electrical parts list and one mechanism parts list for the DMP2000 and DMP3000, with separate cabinet parts.<ref name="smdmp">Amstrad plc, ''DMP2000 / DMP3000 / DMP4000 Printer Service Manual''. Hosted as [[:File:Amstrad DMP2000 DMP3000 DMP4000 Service Manual.pdf]], described at [[Amstrad DMP2000 / DMP3000 / DMP4000 Service Manual]]. Technical specifications p. 2; DIP switches p. 3; cabinet parts list p. 4; ROM/RAM jumper table p. 10; electrical parts list p. 12.</ref>

== Specifications ==

{| class="wikitable styled-table" style="width:70%; text-align:left;"
|+'''DMP3000 specification (user manual chapter 7 and service manual p. 2)'''
! Item !! DMP3000 !! DMP3160
|-
| Speed || 105 cps standard, 26 cps NLQ || 160 cps standard, 40 cps NLQ
|-
| Line feed || 200&nbsp;ms per 1/6 inch || 160&nbsp;ms per 1/6 inch
|-
| Character matrix || colspan="2" | 9 × 9 normal, 9 × 10 double width; 8- and 9-pin bit image; ASCII, italics and international sets
|-
| Pitches || colspan="2" | 10, 12 and 17 cpi; double width 5, 6 and 8.5 cpi
|-
| Paper || colspan="2" | Fan-fold 4.5 to 10 inches; cut sheet or roll 4 to 9.5 inches; original plus one copy
|-
| Mains || colspan="2" | 220–240&nbsp;V AC 50&nbsp;Hz
|-
| Size and weight || colspan="2" | 400 × 250 × 100&nbsp;mm; 4.2&nbsp;kg
|}

Amstrad's service manual gives the DMP3000's double-width speed as 52 cps.<ref name="smdmp" />

== Differences from the DMP2000 ==

The DMP3000 uses a 27256 EPROM at IC8 and a 6264 static RAM at IC10, where the DMP2000 uses a 27128 and a 6116 or 8128; jumpers on the board select the arrangement.<ref name="smdmp" /> Schneider's DMP3000 parts list gives IC8 as a 250&nbsp;ns 27256 and IC10 as a 150&nbsp;ns 6264.<ref name="smschn">Schneider, ''Kundendienst-Handbuch / Service Manual DMP 3000'', Ident-Nr. 33 624. Described at [[Schneider DMP3000 Service Manual]]. Electrical parts list p. 10; fuses p. 11; technical data and DIP switches p. 12.</ref> The top and bottom cabinets, dust cover and rotary knob have their own DMP3000 part numbers; the shield plate is shared.<ref name="smdmp" />

In the DMP3000 user manual, DIP switches DS1-7 and DS1-8 select the default character set: Epson FX standard, Epson FX NLQ, IBM set 1 or IBM set 2. The combined service manual's table, written for both models, gives DS1-7 as 7- or 8-bit code and DS1-8 as standard or NLQ.<ref name="uidmp3000" /><ref name="smdmp" /> Use the table that matches the printer's own firmware. The DMP3000 manual also lists pin 14 of the interface as AFD (auto line feed when taken low) and pin 36 as SLCTIN, where the service manual's pin table shows pin 14 as not connected.<ref name="uidmp3000" /><ref name="smdmp" />

== Repair ==

The [[Amstrad DMP3000 Maintenance Guide]] covers the DMP3000's own parts list, capacitors and fuses; the shared mechanism, ribbon and self-test procedures are on the [[Amstrad DMP2000 Maintenance Guide]].

== Documentation ==

* [[Amstrad DMP3000 User Manual]] – the DMP3000, DMP3160 and DMP3250di user manual
* [[Amstrad DMP2000 / DMP3000 / DMP4000 Service Manual]] – Amstrad's combined service manual
* [[Schneider DMP3000 Service Manual]] – Schneider's edition, with a full electrical parts list

== Related pages ==

* [[Amstrad DMP3000 Maintenance Guide]]
* [[Amstrad DMP2000]] · [[Amstrad DMP2000 Maintenance Guide]]

== References ==
<references />

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[[Category:Amstrad]]