Kit, Logic - Radio Shack TRS-80 Service Manual

1.
Disconnect
all
connectors from
the
components
in
the
electronic
module
assembly.
2.
Remove
the four
screws and
internal lockwashers
(total of eight)
from
right
and
left
sides
mounting
the
electronic
module
to printer
frame.
C.
ADJUSTMENTS
1.
No
adjustments
are required on the electronic module
assembly.
D.
PREVENTIVE
MAINTENANCE
1.
No
maintenance
is
required on the
electronic
module
assembly.
3.17
LOGIC
BOARD
ASSEMBLY
(Figure 3-8 1)
REFERENCE
ASSEMBLY
26
1
2
3
4
5
6
7
PART
NUMBER
63779119-6001
63779104-4001
63701250-6005
34000351-2017
34000455-2004
34000452-2004
34000352-2062
34000455-2006
34000019-2001
DESCRIPTION
Kit,
Logic
Board
Assembly
Note:
This
kit
includes items
1
through
7.
P.C.
Board
Assy., Logic Pwr. Supply
Bd.
Kit,
Logic Board
Mtg.
Hardware
Note:
This
kit
includes items 2 through
7.
Screw,
M3
x 6
mm
Lg.,
Pan
Hd. Phillips
Washer,
Split Lock,
M3
Washer,
Flat,
M3
Screw,
M4
x 14
mm
Lg.,
Pan
Hd. Slotted
Washer,
Split Lock,
M4
Washer,
Flat,
#6, Fibre
QTY.
1
1
1
2
2
2
2
2
4
A.
FUNCTION
For a detailed functional description
of
the
logic
board assembly,
refer to
Section
2,
THEORY
OF OPERATION.
B.
REMOVAL/REPLACEMENT PROCEDURE
TOOLS
REQUIRED:
Phillips
Head and
Slotted
Head
Screwdrivers.
REF.
ELECTRONIC
MODULE
Figure 3-8
1.
KIT,
LOGIC
BOARD
ASSEMBLY
3-26