Sinclair ZX Spectrum Manuals

Manuals and User Guides for Sinclair ZX Spectrum. We have 2 Sinclair ZX Spectrum manuals available for free PDF download: Service Manual, Introduction Manual

Sinclair ZX Spectrum Service Manual (59 pages)

Brand: Sinclair | Category: Desktop | Size: 3.27 MB

Table of Contents
2
1 Introduction

7
- Architecture
  8
- Z80A Cpu
  8
  - Data Bus
    8
  - Address Bus
    8
  - Control Bus
    8
  - CPU Clock
    9
  - Dynamic Memory Refresh
    9
- Memory Organisation
  9
- Read/Write Operations
  10
- Input/Output
  13
- TV Picture Generation
  13
- Keyboard Scanning
  14
- Tape Interface
  15
- Loudspeaker (BEEP) Operation
  15
- Power Supplies
  15
2 Disassembly/Assembly

16
- Disassembly
  16
- Assembly
  16
3 Setting up and System Test

17
- General Alignment
  17
  - Introduction
    17
  - Voltage Check
    17
  - Colour Adjustment
    18
  - Sub-Carrier Oscillator
    18
  - 14 Mhz Oscillator
    18
- System Test
  19
4 Fault Diagnosis and Repair - Getting Started

20
- Introduction
  20
  - Test Equipment
    20
  - Modification History
    21
- Modifications - Issue 1 Board
  22
- Modifications - Issue 2 Board
  23
- Modifications - Issue 3B Board
  23
- Extension Memory - (16K to 48K)
  23
  - Board Issue 1
    23
  - Board Issue 2
    23
  - Board Issue 3
    24
- Hitachi Vs NEC ROM
  24
5 Fault Diagnosis and Repair - PSU and Memory

25
- Fault Diagnosis Techniques
  25
- Power Supply Unit
  25
- Initialization
  26
  - Basic Checks
    26
- Memory Check
  27
  - Example
    28
- Keyboard Structure
  29
6 Fault Diagnosis and Repair - Input/Output

30
- TV Screen Dead, Smoke Appears on Switch-On / Not Initialising
  30
  - TR4 Base-Collector Shorted
    30
  - Short Persists with TR4 Removed
    30
  - TR4 Blows Again
    30
- No Video
  31
  - No Video after ULA Changed
    31
  - No +5V Input
    31
  - No VIDEO INPUT at IC14 Pin 12
    31
- Corrupt Paper, after ULA Change
  32
  - Initial Check
    32
  - No 3Mhz at IC2 Pin 6
    32
  - Distorted Video
    33
  - Pin Screen
    34
- Speaker
  35
7 Fault Diagnosis and Repair - Colour, Repair and Upgrades

36
- IC14 (LM1889) Pin Signals
  36
- 16K to 48K Upgrade
  36
- Repair
  37
  - Integrated Circuits/Link Settings
    37
  - Issue 2 Board
    37
  - Issue 3 Board
    38
  - Issue 3 Links Vs IC Manufacturer and Type
    39
  - Expansion Memory IC Locations
    40
8 Parts List

41
- Introduction
  41
- Notes to Parts List
  41
- General Capacitor Change
  42
- Case Assembly
  42
- Capacitors - All Axial Types Unless Otherwise Stated
  43
- Coil
  44
- Connectors
  44
- Crystals
  44
- Diodes
  44
- Integrated Circuits
  44
- Resistors - All 1/4W, 5% Unless Otherwise Stated
  45
- Transistors
  46
- Miscellaneous
  46
9 Supplement No. 1

47
- Introduction
  48
- DC-DC Converter Modification
  48
  - Circuit Operation
    49
- Issue 3B Board - (Already Covered in Existing Manual)
  49
- Issue 4 Board - None Issued
  49
- Issue 4A Board
  49
- Issue 4B Board
  49
- Issue 5 Board
  49
- Issue 6 Board - None Issued
  50
- Issue 6A Board
  50
- Fault Finding - Servicing Addenda
  50
- Warranty Seal
  50
- Parts Lists
  50
  - Notes
    50
- Capacitors - Unless Otherwise Stated All Are Axial Types
  51
- Coil
  52
- Connectors
  52
- Crystals
  52
- Resistors - 0.25W, 5% Tolerance Unless Otherwise Stated
  53
- Diodes
  54
- Integrated Circuits
  54
- Transistors
  55
- Miscellaneous
  55
10 Supplement no 2

56

Sinclair ZX Spectrum Introduction Manual (36 pages)

Brand: Sinclair | Category: Computer Hardware | Size: 0.82 MB

Table of Contents
5
CHAPTER 1 The Computer and Setting It up

7
CHAPTER 2 The Keyboard

10
CHAPTER 3 Numbers, Letters and the Computer as a Calculator

13
CHAPTER 4 Some Simple Commands

16
CHAPTER 5 Simple Programming

19
CHAPTER 6 Using the Cassette Recorder

23
CHAPTER 7 Colours

27
CHAPTER 8 Sound

29
CHAPTER 9 Inside the Case

31

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Sinclair ZX Spectrum Manuals

Sinclair ZX Spectrum Service Manual (59 pages)

Table of Contents

1 Introduction

2 Disassembly/Assembly

3 Setting up and System Test

4 Fault Diagnosis and Repair - Getting Started

5 Fault Diagnosis and Repair - PSU and Memory

6 Fault Diagnosis and Repair - Input/Output

7 Fault Diagnosis and Repair - Colour, Repair and Upgrades

8 Parts List

9 Supplement No. 1

10 Supplement no 2

Sinclair ZX Spectrum Introduction Manual (36 pages)

Table of Contents

CHAPTER 1 The Computer and Setting It up

CHAPTER 2 The Keyboard

CHAPTER 3 Numbers, Letters and the Computer as a Calculator

CHAPTER 4 Some Simple Commands

CHAPTER 5 Simple Programming

CHAPTER 6 Using the Cassette Recorder

CHAPTER 7 Colours

CHAPTER 8 Sound

CHAPTER 9 Inside the Case

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