Tandy 26-3334 Vintage Computer Manuals

Tandy 26-3334 Vintage Computer Manuals

Manuals and User Guides for Tandy 26-3334 Vintage Computer. We have 2 Tandy 26-3334 Vintage Computer manuals available for free PDF download: Service Manual

Tandy 26-3334 Service Manual

Tandy 26-3334 Service Manual (129 pages)

Brand: Tandy | Category: Desktop | Size: 4 MB

Table of Contents

Table of Contents

2
- Main PCB ]
  2
  - Section I
    5
- Introduction
  5
- Section General
  5
- System Description
  5
  - Memory Map
    8
  - Color Computer
    8
- I/O Control Registers
  9
- Chip Control Registers
  11
  - Color Computer
    11
    
    Color Computer
    15
- 68B09E Vector Registers
  22
- Section Specifications
  23
- Technical
  23
- Physical
  25
  - Disassembly/Assembly
    26
- Assembly
  26
  - Removal of Top Cover
    26
  - Removal of Main PCB
    26
- Disassembly
  26
- RAM Upgrade Instructions
  27
  - RAM Card
    27
- Block Diagram
  28
- NTSC Version
  28
- PAL Version
  29
- Mc68B09E/Mbl68B09E/Hd68B09E (Ic1)
  30
- Section Theory of Operation
  30
- Memory (RAM)
  34
  - DRAM Block Diagram
    34
    
    DRAM Timing
    35
- Tcc1014 (Vc2645Qc)
  36
  - Address Decoding
    36
  - MMU Block Diagram
    37
- PAL Encoder (PAL Version Only)
  38
- Pias <IC4 and IC5)
  39
  - PIA Block Diagram
    39
- Keyboard Interface (IC5)
  40
  - Color Computer 3 Keyboard Array
    40
- Rom (Ic2)
  41
- DAC Circuitry (IC7)
  42
  - DAC Block Diagram (IC7)
    42
- SALT Circuitry
  44
  - SALT Block Diagram (IC8)
    44
  - Power Supply
    45
    
    I/O Circuitry
    45
- 5.10 Cassette Tape Format Information
  47
- RS-232C Connector (JK3)
  47
  - RS-232C Connector Pinout
    48
- Cartridge Connector
  49
- Joysticks
  52
  - Joystick Schematic
    52
- Power Transformer
  52
- TV Switch Box (NTSC Version Only)
  53
  - Antenna Switch Box Schematic
    53
- Introduction
  54
  - Color Computer
    54
- Video Problems
  55
  - Wrong Color
    55
  - RGB Problem
    55
Table of Contents

81
- Pcb Views
  82
- Electrical Parts List
  84
- Exploded View Parts List
  90
- Exploded View
  92
- Semiconductor Information
  93
Table of Contents

107
- Pcb Views
  108
- Exploded View Parts List
  119
- Exploded View
  121
- Semiconductor Information
  123
- Schematic Diagram
  126

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Tandy 26-3334 Service Manual

Tandy 26-3334 Service Manual (122 pages)

COLOR COMPUTER 3 NTSC/PAL VERSION WITH 512K EXPANSION RAM CARD

Brand: Tandy | Category: Desktop | Size: 4 MB

Table of Contents

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