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[1] General
The PA-W1400/PA-W1410 is a portable personal word processor that
has the ordinary electronic typewriter (ET) functions and the text
editing functions of a common word processor (WD) that can be
switch selected. It has the following features:
What the PA-W1400 differs from the PA-W1410 is in the liquid crystal
display panel and backlight circuit. The PA-W1410 has the backlight
feature. There is a different method for the liquid crystal display unit
depending on the availability of the backlight feature.
@ An 80 characters x 16 lines large size screen liquid crystal display
with a tilt mechanism. The backlight is adopted for the PA-W1410,
while it is not used by the PA-W1400.
(1) Electrical circuit
The main control PWB consists of a power supply, mechanical drive,
keyboard
control, beeper drive, liquid display, and data storage
(memory, floppy disk).
(2) Block diagram
The figure below shows the block diagram for the printer block, key-
board block, floppy disk block, power supply block, and main control
PWB.
PA-W1400
@ Internal single floppy disk drive
@ Use of a 96-character replaceable printwheel (non-cassette type)
Block diagram
AC(V)
50/60H2
+
Power
supply unit
Printer mechanical unit
Lop unit
Switch
Head cable
>|
T
CITT
a
al]
Carriage motor
Carriage
G
home position
sensor
Main control PWB unit
(EI Paper
teed motor
i]
l
FDD unit
Keyboard unit
NOTE: The LCD unit service parts is available with it assembled in
the LCD cabinet.
Since it would be probable that an open line or a contact
failure may occurs at the junction between the PWB and the
LCD because
of corrosion, if the LCD PWB was left stored by
itself for a long period of more than three month,
it needs to
be stored with the LCD assembled to the LCD cabinet with
'screws, Although the assembly is made available for the ser-
vice parts, it has to be returned to its original state if the LCD
PWéB was removed for parts replacement. Refer
to a later
Paragraph discussing "LCD unit disassembly
and re-assemb-
ly" for details of assembly.
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