Table Of Contents - Tandy WP-2 Service Manual

CONTENTS
Section
I
SYSTEM OVERVIEW
..
1-1
1-1
External
View
1-1
I-2
Internal
View..
1-4
I-3
Specifications
1-6
Section
II
DISASSEMBLY INSTRUCTIONS
2-1
11-1
Top Case
2-1
II-2
Keyboard
2-3
II-3
LCD
2-4
II-4
Main
PCB
2-4
II-5
Sub
PCB
2-6
Section
III
MAINTENANCE
3-1
lll-l
Clean the
Case and
LCD
Display 3-1
Section
IV
Theory
of
Operation
4-1
IV-1
Hardware
Specifications 4-1
IV-2
Description
of
Block
Diagram
4-4
IV-3
CPU
4-4
IV-4
Memory Map
4-5
IV-5
Main
RAM
Control
Circuit
4-5
IV-6
Expansion
RAM
Control
Circuit
4-6
IV-7
ROM
Control
Circuit
4-6
IV-8
I/O
Address
Map
4-7
IV-9
Interrupt
4-9
IV-10
Keyboard
4-9
IV-1
1
Cassette
Interface
Circuit
4-10
IV-1 2
Printer Interface Circuit 4-11
IV-1
3
Serial
Interface
Circuit
4-12
IV-1 4
Buzzer Control
Circuit
4-13
IV-1
5
LCD
Controller
4-13
IV-1 6
Power
Supply
4-14
IV-1 7
Software
Calls 4-1
IV-1
8
Software
and Hardware
Memory Map
4-17
IV-19
IC
Card
4-20