Radio Shack TRS-8O Manuals

Manuals and User Guides for Radio Shack TRS-8O. We have 2 Radio Shack TRS-8O manuals available for free PDF download: Service Manual, Operator's Manual

Radio Shack TRS-8O Service Manual

Radio Shack TRS-8O Service Manual (126 pages)

DISK/VIDEO INTERFACE

Brand: Radio Shack | Category: Floppy Disk Drive | Size: 2.68 MB

Table of Contents

Table of Contents
2
1 Iintroduction

7
- General
  7
- System Overview
  8
- Specifications
  10
2 /Disassembly Instructions

11
- Top Case
  11
- Main P.C. Board
  11
- Power Supply P.C. Board
  11
- Disk Drive Unit
  12
- Front Panel Assembly
  12
3 /Preventive Maintenance

13
- Adjustment
  13
- System Clock
  13
- System Clock Adjustment
  13
4 /Theory of Operation

15
- Cpu
  16
- Address Decoding and Bank Selection Circuit
  17
- Memory Map
  17
- I/O Map
  18
- Memory Map
  18
- Clock Generator Circuit
  19
- System Bus Interface Circuit
  20
- Crt Interface and Control Circuit
  22
- Display Timing Chart (40 Characters Mode)
  23
- Display Timing Chart (80 Characters Mode)
  24
- Waveform of Video Signal
  24
- Flicker Suppressing Circuit
  25
- Flicker Suppression Circuit
  25
- FDD Interface Block Diagram
  26
- Fdd Control Circuit
  27
- Data Separator
  28
- Pre-Compensation Circuit
  29
- Wait Control Circuit
  29
- Power Supply and Reset Circuit
  30
5 /Troubleshooting

31
- Troubleshooting Flowchart
  31
- Checking Procedure
  32
6 /Exploded View and Parts List

41
- RF Modulator
  49
- Mechanical/Assembly Parts
  54
7 /P.C. Board Views and Schematic Diagram

56
- Power Supply P.C. Board
  64
Appendix Ai Installation of Additional Disk Drive Unit

68
- Installation of FDD
  68
Appendix B/Connector Pin Assignments

70
- System BUS Connector
  70
- Rf Modulator
  71
- Clamp Base BK and Clamp Arm K Removals
  73
- Carrier BK Removal
  74
- Spindle Motor K Removal
  76
- 2-2 Block Diagram
  87
- Exploded View
  116

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Radio Shack TRS-8O Operator's Manual

Radio Shack TRS-8O Operator's Manual (58 pages)

Model 16

Brand: Radio Shack | Category: Desktop | Size: 2.29 MB

Table of Contents

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