Schneider PC 2640 Service Manual
The Kundendienst-Handbuch / Service Manual, Personal Computer PC 2640 (Ident-Nr. 36523) is a Schneider service manual, not an Amstrad one. The PC 2640 was an IBM PC AT-compatible machine that the Schneider Computer Division showed at the Systems fair in Munich in October 1987; unlike the Amstrad-designed PC 1512 and PC 1640 that Schneider had sold, it was Schneider's own design.[1] The manual has 42 pages in German with English column headings, and a machine-read text layer.
Contents
[edit | edit source]The manual has no contents page. Its sections, by PDF page:
- Exploded view – 2; parts list for the system unit – 3
- Exploded view, keyboard – 4
- Wiring diagrams – 5, 6
- Parts list and LED board schematic – 7, 8
- CPU board: parts list 9, block diagram 10, component side 11, soldering side 12, schematic diagrams 13–19
- Multi I/O board: parts list 20, component side 21, soldering side 22, block diagram 23, schematic diagrams 24–36
- Parts list (slot board, power supply, drives) – 37; slot board component and soldering sides – 38
- Jumper and DIP switch default settings for the Multi I/O and CPU boards, and the external floppy connector pinout – 39, 40
- Ordering note – 41; Schneider Service-Information No. 884433 – 42
What it covers
[edit | edit source]The parts lists give Schneider order numbers, descriptions, circuit references and price groups, in German and English. The CPU board list (p. 9) names an 80286-12 at U63, a Chips and Technologies chipset (82C201, 82C202, 82A203, 82A204, 82A205 and 82C206), an 80C42C keyboard controller at U32, 41256 and 4164 DRAMs, two 27128 EPROMs at U44 and U45, 12, 20 and 25 MHz oscillators, 32.768 kHz and 14.318 MHz crystals, and a 3.6 V battery. The Multi I/O board list (p. 20) shows a Western Digital hard disc controller chip set (WD10C21, WD1015, WD5011, WD11C00) and a PEGA1A video chip. Pages 39 and 40 give the factory jumper and switch settings, and page 42 asks for the complete system unit or the complete board set (CPU, Multi I/O, slot) to be sent in for service.
What this manual does not contain
[edit | edit source]- Capacitors. The parts lists cover ICs, resistor networks, crystals, connectors and mechanical parts; capacitor values appear only on the schematics.
- Power supply detail. The supply is a single line item, "Netzteil / Power supply" (p. 37).
- Adjustment or fault-finding procedures.
- Prices: costs are given as price-group letters.
References
[edit | edit source]- ↑ Heinz Nixdorf MuseumsForum, "Das war der Schneider Euro PC", HNF Blog, 9 May 2023. Says the PC 2640 was shown at Systems in October 1987, was AT-compatible, and was "eine Eigenentwicklung" (Schneider's own development).
Download: Amstrad PC 2640 Service Manual.pdf