Amstrad PC2386: Difference between revisions
New page from Amstrad's PC2386-65 service manual and owners' repair reports |
Cite the separately hosted pages 47-48 (supply schematic); add IC601 pin voltages |
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The '''Amstrad PC2386''' is the 80386 model of Amstrad's PC2000 series, alongside the [[Amstrad PC2086]] and [[Amstrad PC2286]]. It has a 20 MHz 80386 with a 64 KB cache, 4 MB of 32-bit parity memory, five 16-bit expansion slots, a Paradise VGA adaptor on the main board and, as the PC2386-65, a 65 MB hard disc. Amstrad's specification lists built-in LIM 4.0 expanded memory and MS-DOS 4.0 with Windows/386.<ref name="sm">Amstrad plc, ''PC2386-65 Personal Computer Service Manual''. Hosted as [[:File:Amstrad PC 2386 Service Manual.pdf]], described at [[Amstrad PC 2386 Service Manual]]. Technical specification, notes to engineers and safety tests p. 2; alignment instructions p. 3; main PCB views pp. 4–5; electrical parts list pp. 44–45. Pages 47 (cabinet parts) and 48 (power supply schematic) | The '''Amstrad PC2386''' is the 80386 model of Amstrad's PC2000 series, alongside the [[Amstrad PC2086]] and [[Amstrad PC2286]]. It has a 20 MHz 80386 with a 64 KB cache, 4 MB of 32-bit parity memory, five 16-bit expansion slots, a Paradise VGA adaptor on the main board and, as the PC2386-65, a 65 MB hard disc. Amstrad's specification lists built-in LIM 4.0 expanded memory and MS-DOS 4.0 with Windows/386.<ref name="sm">Amstrad plc, ''PC2386-65 Personal Computer Service Manual''. Hosted as [[:File:Amstrad PC 2386 Service Manual.pdf]], described at [[Amstrad PC 2386 Service Manual]]. Technical specification, notes to engineers and safety tests p. 2; alignment instructions p. 3; main PCB views pp. 4–5; electrical parts list pp. 44–45. Pages 47 (cabinet parts) and 48 (power supply schematic), missing from that scan, are hosted as [[:File:Amstrad PC 2386 Service Manual pages 47-48.pdf]].</ref> The system unit is larger than the PC2086's, at 415 × 160 × 485 mm.<ref name="sm" /><ref name="sm2086">Amstrad plc, ''PC2086 S/D/30 Personal Computer Service Manual''. Hosted as [[:File:Amstrad PC 2086 Service Manual.pdf]], described at [[Amstrad PC 2086 Service Manual]]. Technical specification p. 2.</ref> | ||
== History == | == History == | ||
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=== Power === | === Power === | ||
The supply has its own fan (M601), a 330 µF 400 V reservoir capacitor (C601), an STK7458 hybrid regulator and two optocouplers, a TLP732 (Q602) and a TLP741G (Q603).<ref name="sm" /> It is adjusted with VR604 for +5 V and VR603 for +12 V, and VR601 sets the primary protection.<ref name="sm" /> Amstrad allowed component-level repair of the supply and monitors, but not of the main CPU board or the drives.<ref name="sm" /> The schematic | The supply has its own fan (M601), a 330 µF 400 V reservoir capacitor (C601), an STK7458 hybrid regulator and two optocouplers, a TLP732 (Q602) and a TLP741G (Q603).<ref name="sm" /> It is adjusted with VR604 for +5 V and VR603 for +12 V, and VR601 sets the primary protection.<ref name="sm" /> Amstrad allowed component-level repair of the supply and monitors, but not of the main CPU board or the drives.<ref name="sm" /> The supply schematic is page 48, hosted separately; it prints the DC voltages at the pins of the STK7458 and marks the +5 V and +12 V overload protection and the over-voltage protection circuits.<ref name="sm" /> | ||
== Repair guides == | == Repair guides == | ||
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== Documentation == | == Documentation == | ||
* [[Amstrad PC 2386 Service Manual]] – Amstrad's PC2386-65 service manual | * [[Amstrad PC 2386 Service Manual]] – Amstrad's PC2386-65 service manual, with pages 47–48 in a separate file | ||
== Gallery == | == Gallery == | ||