Tandy PC-6 User Manual

CONTENTS
PAGE
SPECIFICATIONS
•....••..•..•...........•.........•...•....•..•.•........•.•.. 3
How To Open Upper Case ....................................•............••.. 3
THEORY OF OPERATION
...........•......................•.......••.......... 4
Block Diagram
...•..•••..••••...•.•..........•..•.........•.•.....•.....•••. 4
LSI
•............................. · ......................•.......•......... 5
Ram Map ...••.....•••..........•...........•........•.......•............. 5
Buzzer Control Circu
it •..........................................•........... 6
Interrupt Circuit 6
Keyboard
.•.................................................•.........•... 6
Power Supply
........•..................................................... 7
LSI (Pin Functions)
.....•.....•...•............................................. 8
DISPLAY
•..............•..........................................••......... 9
TROUBLESHOOTING GUIDE
.......•........................................... 10
Test Programs
11
Operation Check ........................................•...•.•.•.....•.... 14
PCB ASSEMBLY VIEWS .......••..........•..•.......•........................ 19
PARTS LIST
...........•..•...........................•...................... 20
Electrical
Parts .........•.................•.........•...................... , 20
Mechanical Parts
..................•........................................ 21
EXPLODED VIEW/DISASSEMBLY INSTRUCTIONS 23
SCHEMATIC
DIAGRAM ...•...•...........•.................................... 24
Main Block
..............••........•..•.....•............................. 24
Keyboard
.•....•.••.............••........••..•.......................... 25
Display
.........•.•..••..••.....•.•.......•..••.......................... 26

Tandy PC-6 Specifications

General

Brand	Tandy
Model	PC-6
Category	Calculator
Language	English