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General
System
Problems
Diskette Drive Problems
If there is a problem with the diskette drive, see the suggestions below:
Figure 24
Diskette Drive Problems
Operating System Error Messages
If the system boots, but the operating system displays a diskette access error message, follow
these suggestions:
1
Run the SETUP program and make sure the diskette drive type is set correctly and the
diskette drive controller is enabled.
2
Remove the computer cover and make sure the diskette drive interface and power
connectors are completely inserted. Replace the cover.
3
Test the drive by running the diskette drive diagnostics test. If the test indicates an
error, replace the diskette drive.
4 Replace the system board. The FDD controller in the 82C711 gate array may be
faulty. Authorized service centers outside the U.S. can replace the gate array chip.
Diskette Drive Noise
lf the diskette drive is making loud or unusual noises, check for any loose parts and replace
the diskette drive if necessary.
2-12
Epson
NX
Service
Manual
- Service Manual 1
- Copyright Information 2
- Trademark Information 2
- Epson NX Service Manual iii 3
- Canadiennes 4
- Other Agency Approvals 4
- About this Manual 5
- System Overview 8
- General Features 9
- Front Panel 10
- Rear Panel 11
- Upgrades 12
- Document Sources 13
- Environmental Specifications 14
- Subassembly Descriptions 15
- System Board 16
- Connectors and Jumpers 18
- Power Supply 20
- Table 1-12 21
- Power Supply Specifications 21
- Epson NX Service 21
- System Description 22
- CMOS RAM 23
- Memory Expansion 24
- Mass Storage 25
- Table 1-16 26
- Table 1-18 26
- Table 1-19 28
- Keyboard 29
- 2 Troubleshooting 30
- General Information 32
- Table 2-2 33
- Power-On Diagnostics and 35
- Error Beep Codes 37
- General System Problems 38
- Computer Doesn’t Start 39
- Blank Screen 39
- Power Supply Shut Down 39
- Keyboard Problems 40
- Video Problems 41
- Incorrect Images 42
- Diskette Drive Problems 43
- Hard Disk Problems 44
- System Software Problems 45
- Parallel Printer Problems 46
- Serial Port Problems 47
- Option Card Problems 48
- Memory Module Problems 49
- Mouse Problems 50
- Removing and Replacing 52
- Subassemblies 52
- General Service Information 54
- System Unit 55
- Replacing the Cover 57
- Removing an Option Card 58
- Installing an Option Card 60
- Removing SlMMs 62
- Installing SlMMs 63
- Installing Another Processor 64
- Removing 66
- Replacing Subassemblies 66
- 3-14 Epson NX Service Manual 67
- 3-16 Epson 69
- NXService Manual 69
- Removing the Power Supply 70
- Reinstalling the Power Supply 71
- Removing the Speaker 72
- Replacing the Speaker 72
- Removing the LEDs 73
- Replacing the LEDs 73
- Removing the BIOS EPROMs 74
- Replacing the BIOS EPROMs 74
- Removing the System Board 75
- Replacing the System Board 76
- Removing the Front Bezel 76
- Replacing the Front Bezel 77
- Reference Materials 78
- System l/O Address Map 82
- DMA Assignments 84
- Hardware Interrupts 85
- Connector Pin Assignments 86
- Speaker Connector 87
- Serial Port Connectors 87
- Parallel Port Connector 88
- Diskette Drive Data Connector 90
- Keyboard and Mouse Connectors 91
- Battery Connector 92
- Reset Connector 92
- Power Supply Connectors 93
- Table A-12 94
- HDD Access LED Connector 95
- Power (SPEED) LED Connector 95
- VGA Feature Connector 96
- Option Slot Connectors 97
- Drive Power Connectors 98
- Intel Ether Express 16C 98
- AHA-1504B 100
- Table A-21 101
- Adaptec Jumper Settings 101
- List of Abbreviations 103
- Reference Materials 104
- NX Service 104
- Manual A-25 104
- System Utilities 105
- Epson NX Service Manual 106
- Running the SETUP Program 107
- The SETUP Screens 108
- Selecting Options 109
- Setting the Date and Time 110
- Setting the Fast Boot Option 113
- Setting the Keyboard Options 114
- Installed Equipment 114
- Setting the Parallel Port 115
- Setting the Serial Port 115
- Setting the Speaker 115
- Setting the Password security 116
- Installed Diskette Drive(s) 117
- Installed Hard Disk Drive(s) 117
- Hard Disk Drive Types 117
- Defining Your Own Drive Type 118
- Setting the Non-cache Areas 119
- Saving Your Settings 120
- Performing System Diagnostics 121
- A: prompt 122
- Deleting Tests 123
- Adding Tests 124
- Running Tests 125
- Resuming From an Error 126
- System Diagnostics Tests 127
- Error Messages 128
- HDFMTALL and press Enter 130
- Option 1, Format 132
- Fotmatting the Disk 134
- Exiting the Program 136
- Additional Utilities 137
- Schematics 138
- Circuitry 139
- Manual C-3 139
- Video Circuitry ( Part 1 ) 140
- Epson NX Sevice Manual 140
- Circuitry 142
- NX Service Manual 146
- Connector 147
- Processor 153
- Connector (CN12) 153
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