Tandy 6000 Service Manual page 11

Service Manual
A simplified exploded view of the TANDY 6000/6000-HD (Figure
1-1) helps locate major sub-assemblies as they are described
in the following paragraphs.
in Section 3 must be followed in the order presented due to
the mounting locations of the individual components.
The major subassemblies that comprise the TANDY 6000/6000-HD
include (1) the Base Assembly,
(3) the RESET Switch/Power-On Indicator Module with cable
assembly, (4) the Disk Drive/Drive Support structure,
Cover Assembly,
Assembly, and (8) the Keyboard Assembly.
each of these assemblies is discussed in Section 3.
should be exercised in handling plastic components to
prevent scratching or marring of the surface finish.
1.1 Base Assembly
The Base Assembly consists of the molded plastic base, power
and signal I/O component mounting brackets, power ON/OFF
switch, and Sound PCB that is responsible for generating an
audible tone when key closure is achieved.
assemblies of the TANDY 6000/6000-HD are mounted to the Base
Assembly. The Base Assembly has rubber feet to protect the
surface on which the TANDY 6000/6000-HD is placed for
operation.
1.2 Electronics Module
The Electronics Module consists of a formed metal chassis,
three component mounting brackets, two printed circuit
boards, and a card cage assembly with three additional
boards. It is mounted to the instrument Base Assembly with
four screws that are accessible when the Top Cover Assembly
is removed from the computer.
electrical connections to the assembly are removed, the
Electronics Module may be removed from the Base Assembly as
a unit. The module mounts the I/O Processor PCB, the
Video/Keyboard Interface PCB, 16-bit CPU/Memory PCBs, the
Power Supply PCB, and the power supply cooling fan.
ribbon cables connected to the I/O Processor Board exit the
module through a slot in the right side of the chassis and
connect to the rear terminal input connectors or the disk
drive(s). The Power Supply Assembly covers the front half
of the assembly.
edge card connector in the middle of the I/O Processor
Board. It is rigidly supported by the card cage sheet metal
at the rear of the module.
TANDY COMPUTER PRODUCTS
Disassembly procedures noted
(2) the Electronics Module,
(6) the Bezel/CRT Assembly,
When these screws and the
The Mother Board mounts vertically in the
- 3 -
TANDY 6000/6000-HD
----------------------------------------------------------------------
(5)Top
(7) Card Cage
The disassembly of
Care
The other
Three