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–U9 and U12–U20, 4164-12 DRAMs at U23–U31 and U33–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 kHz and 14.318 MHz on one board, 15 MHz and 10 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.

Download here: Amstrad PC 2640 Service Manual.pdf

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