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26-3334
Service manual
Tandy 26-3334 Service Manual
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Service manual
(122 pages)
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Contents
Table of Contents
Bookmarks
Table of Contents
Table of Contents
Main PCB ]
Section I
Introduction
Section General
System Description
Memory Map
Color Computer
I/O Control Registers
Chip Control Registers
Color Computer
Color Computer
68B09E Vector Registers
Section Specifications
Technical
Physical
Disassembly/Assembly
Assembly
Removal of Top Cover
Removal of Main PCB
Disassembly
RAM Upgrade Instructions
RAM Card
Block Diagram
NTSC Version
PAL Version
Mc68B09E/Mbl68B09E/Hd68B09E (Ic1)
MC68B09E Programming Model
MC68B09E Pin Assignments
MC68B09E Read/Write Timing at 0.89 Mhz
Section Theory of Operation
Memory (RAM)
DRAM Block Diagram
DRAM Timing
Tcc1014 (Vc2645Qc)
Address Decoding
MMU Block Diagram
PAL Encoder (PAL Version Only)
Pias <IC4 and IC5)
PIA Block Diagram
Keyboard Interface (IC5)
Color Computer 3 Keyboard Array
Rom (Ic2)
DAC Circuitry (IC7)
DAC Block Diagram (IC7)
SALT Circuitry
SALT Block Diagram (IC8)
Power Supply
I/O Circuitry
5.10 Cassette Tape Format Information
RS-232C Connector (JK3)
RS-232C Connector Pinout
Cartridge Connector
Line Printer Variables
Alternate Line Printer Variable Values
Cartridge Connector Signals
Joysticks
Joystick Schematic
Power Transformer
TV Switch Box (NTSC Version Only)
Antenna Switch Box Schematic
Introduction
Color Computer
Video Problems
Wrong Color
RGB Problem
Table of Contents
Pcb Views
Electrical Parts List
Exploded View Parts List
Exploded View
Semiconductor Information
Table of Contents
Pcb Views
Exploded View Parts List
Exploded View
Semiconductor Information
Schematic Diagram
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TANDY'
Service
/~\
Ul
COLOR COMPUTER
3
IMTSC/PAL
VERSION
with
512K
Expansion
RAM
Card
Catalog
Number:
26-3334
CUSTOM MANUFACTURED
FOR RADIO SHACK,
A
DIVISION
OF
TANDY CORPORATION
Table of
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