Table Of Contents - Radio Shack TRS-80 Service Manual

Color Computer 2
TRS-BO ®
Service Manual
TABLE OF CONTENTS
1/ General
1.1
1. 2
1. 3
Introduction •......
System Description ...... .
Memory Map . . . . . . . . . . . . . . .
2/ Specifications
2.1
2.2
2.3
Physical..
Power .....
Technical.
3/ Disassembly/Assembly
3.1
3.2
3.3
Disassembly ......... .
Assembly . . . . . • . . . . . . . . . . .
64K Upgrade Instructions.
4/ Theory Of Operation
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
4.9
4.10
4.11
4.12
4.13
4.14
4.15
MC6809E CPU ...
Reset Circuit ..
Memory ....... .
Video Generation Circuitry.
Artifacting ............ .
PIAs ....•
ROM • •••••
Keyboard Interface ..
DAC Circuitry ..... .
SALT Circuitry .•........•.••.
Cassette Tape Format Information ..
RS232 Connector (J3)
Cartridge Connector (J6).
Power Transformer ......... .
Joysticks ...... .
4.16 TV Switch Box .•.
Schematic 8000191, Color Computer.
Component Layout 1700235, Main Logic Board 8857636.
Circuit Trace, PCB 8857636, Component Side ....... .
Circuit Trace, PCB 8857636, Solder Side ..
Parts List, PCB 8857636 ................ .
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1
1
6
13
13
13
15
16
18
19
26
27
31
34
36
39
39
41
44
48
49
51
55
55
56
57
61
63
65
67
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