Service manual

FileStore Service Manual v
3. E20 Disassembly and assembly 37
3.1 Disassembly procedure 37
3.2 Serviceable parts 37
3.3 Assembly procedure 37
4. E20 Circuit description 39
4.1 The disc controller board 39
4.2 SCSI control and data lines 39
4.2.1 Other pins 40
4.2.2 SCSI connector pinout (PL2 and J4) 40
4.3 Bus phases 40
4.3.1 Bus free phase 41
4.3.2 Selection phase 41
4.3.3 Information transfer phases 41
4.4 The reset condition 42
4.5 The 2MHz bus 42
4.6 Winchester Disc Host Adaptor 43
4.6.1 Address decoding and handshaking 43
4.6.2 Buffering 44
4.6.3 Termination 45
5. E20 Fault finding 47
5.1 Power supply 47
5.2 Address decoding 48
5.3 Hand shaking 48
5.4 Bus lines 48
5.5 Final checks 48
PART III : FILESTORE E01S 49
1. Introduction to the E01S unit 51
1.1 Equipment description 51
1.2 Function 51
1.3 Prerequisites for use 51
1.4 Enhancements 51
2. E01S Specification 53
2.1 General specification 53
2.2 Physical 54
2.2.1 E01S unit 54
2.2.2 E01S packaging 54
2.3 Operation 54
2.3.1 Indicators 54
2.3.2 Controls 54
2.4 Signal connectors 55
2.4.1 FileStore E01S expansion bus pinouts 55
2.4.2 Econet port 55
2.4.3 Printer port 56
2.5 Power input 56
2.5.1 Power input requirements 56
2.5.2 Mains interruptions (‗Brown out‘) 56
2.5.3 Power input plug and cable description 57
2.6 Power supply 57
2.6.1 Power required 57
2.6.2 Specification 57
2.7 Safety Standards 57
2.8 Electromagnetic interference 57
2.8.1 Standards 57
2.8.2 Mains transients 58