Tandy 1400LT - Page 4

Vl.2 . Parts List ................................................................................................................. 6-9
MAIN PCB Assembly
............................................................................................. 6-9
POWER PCB Assembly
........................................................................................ 6-16
SUB PCB Assembly
............................................................................................... 6-19
MEMORY PCB Assembly
..................................................................................... 6-20
LED PCB Assembly
............................................................................................... 6-21
LCD Unit Assembly
............................................................................................... 6-22
Mechanical and Assembly Parts
........................................................................ 6-28
Keyboard Unit Assembly
..................................................................................... 6-30
FDD
........................................................................................................................... 6-23
PART VI1 . CIRCUIT DIAGRAMS ................................................................................. 7-1
VII-1 Main PCB Circuit Diagram
................................................................................... 7-1
Vll-2 RAM PCB Circuit Diagram -RAM
........................................................................ 7-18
Vll-3 LED (Upper) PCB Circuit Diagram-LED
............................................................ 7-19
Vll-4 Power (SUB) PCB Circuit Diagram
.................................................................... 7-20
PART Vlll PCB VIEWS .................................................................................................... 8-1
VIII-1 MAIN PCB Views .................................................................................................... 8-1
Vlll-2 POWER PCB Views
............................................................................................... 8-3
Vlll-3
UPPER PCB (LED) Views ..................................................................................... 8-4
Vlll-4 SUB PCB Vliews
.................................................................................................... 8-4
Vlll-5 MEMORY PCB Views
............................................................................................ 8-5
APPENDICES
Appendix A . LCD SPECIFICATIONS ............................................................................ A-1
1 .
2 .
3 .
4 .
5 .
6 .
7 .
8 .
Application ........................................................................................................
Composition ......................................................................................................
Mechanical Specifications .............................................................................
Electrical Specifications ................................................................................
Interface Specifications .................................................................................
Optical Characteristics ...................................................................................
Option .................................................................................................................
Precautions in use ..........................................................................................
A- 1
A- 1
A-2
A-3
A-5
A-9
A-11
A-12
Appendix B
. REPLACEMENT OF EL BACK LIGHT ................................................... B-1
Appendix C . 3.5 inch FDD SPECIFICATIONS ............................................................. C-1
1 . Introductions .................................................................................................... C-1
2 . Electrical Interface .......................................................................................... C-6
4 . Installation ......................................................................................................... C-18
5 . Operation Procedure ...................................................................................... C-20
6
. Recording Format ........................................................................................... C-21
3
. Physical Interface .............................................................................................. C-16
...
111