Acorn BBC Master 128, Service Manual

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Master Series Service Manual
BBC Master Series Microcomputer Service Manual
Contents
1 - Introduction
2 - Packaging and installation
3 - Disassembly and assembly
4 - Selection links
5 - Hardware description
5.1 Introduction
5.2 Core machine
5.3 Internal I/O
5.4 External I/O
6 - Test equipment
7 - Fault finding
7.1 Switch on
7.2 Sideways RAM
7.3 Video
7.4 Real time clock
7.5 Analogue port
7.6 RS423 port
7.7 Cassette interface
7.8 Disc drive interface
7.9 Parallel printer port
7.10 User port
7.11 1MHz bus
7.12 The Tube
7.13 Internal co-processor
7.14 Sound output
7.15 Modem connector
7.16 Cartridge port
7.17 Econet
Appendix
Connector pinouts
Parts list
Component locations
PCB circuit diagram
Final assembly
EPROM cartridge circuit diagram
Econet module circuit diagram
Keyboard circuit diagram
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