Editing Amstrad PC 2640 Service Manual

The document held under this title is a '''Schneider''' service manual, not an Amstrad-branded one: '''"Kundendienst-Handbuch / Service Manual, PERSONAL COMPUTER PC 2640, Ident-Nr.: 36523"'''. 42 pages, German with English column headings throughout, and a text layer. The last page is a '''Schneider Service-Information''' notice, number 884433.

Schneider distributed Amstrad's machines in German-speaking Europe and later built its own; the PC 2640 is documented here in Schneider's house style, with '''order numbers and price groups''' rather than component values.

== Contents ==

* Exploded view; '''spare parts list for the PC 2640''' (bilingual: Bezeichnung / Description, Zeichen-Pos. / Ref.-No., Best.-Nr. / Part-No., Preisgruppe)
* Exploded view — keyboard
* Wiring diagrams
* '''LED board''' schematic diagram and component location
* '''CPU board''': parts list, block diagram, component side, soldering side, and '''seven pages of schematic diagrams'''
* '''Multi I/O board''': parts list, component side, soldering side, block diagram, and '''thirteen pages of schematic diagrams'''
* '''Slot board''': parts list, component side and soldering side
* '''Jumper and DIP switch default settings''' for the Multi I/O and CPU boards
* Ordering note and the Schneider service bulletin

== What it settles ==

* '''The PC 2640 is an 80286 machine.''' The CPU board parts list gives '''U63 as an 80286-12''', with '''41256-12''' DRAMs at U1&ndash;U9 and U12&ndash;U20, '''4164-12''' DRAMs at U23&ndash;U31 and U33&ndash;U41, an '''80C42C''' keyboard controller at U32, '''27128-15''' EPROMs at U44 and U45, and a Chips and Technologies chipset — '''82C201''' (U56), '''82C202''' (U49), '''82A203.12''' (U51), '''82A204''' (U64), '''82A205.12''' (U53) and '''82C206''' (U50) — plus a PAL20R6 at U54.
* '''Crystals are listed with frequencies''': 32.768&nbsp;kHz and 14.318&nbsp;MHz on one board, 15&nbsp;MHz and 10&nbsp;MHz on the other.
* '''The jumper and DIP switch page''' gives Schneider's factory default settings for both boards — the fastest way to recover a machine somebody has reconfigured.
* Schneider's own service policy, printed on the last page: in the event of a fault, return '''the complete system unit or the complete board set (CPU, Multi I/O, SLOT)'''.

== What this manual does not contain ==

* '''No capacitors and no component values.''' This is the important limitation. The parts lists cover ICs, '''resistor networks''' (by designator, not by value), crystals, connectors, cables, mechanical parts and assemblies — and '''not one capacitor appears in any of them'''. Values for passives must be read off the schematics or the board.
* '''No power supply data.''' The supply is a single line item, "Netzteil / Power supply".
* '''No alignment, adjustment or fault-finding procedures''' and no diagnostic flowchart.
* '''No monitor coverage.'''
* '''Prices are given as price-group letters''', not figures, so the list carries no cost information.

<pdf> File:Amstrad PC 2640 Service Manual.pdf </pdf>

Download here: [[:File:Amstrad PC 2640 Service Manual.pdf|Amstrad PC 2640 Service Manual.pdf]]

== Related pages ==

* [[Amstrad PC 2086 Service Manual]] · [[Amstrad PC 2386 Service Manual]]

[[Category:Amstrad Service Manuals]]
[[Category:Service Manuals]]