Sharp PC-4741 Service Manual page 3

-
P C=lfT4F
s .. Operate th·" tCD. r"leas~'leite" 'unfix;tns
;upper
cabinet and the
LCD section, and separate,
the
upp-et:cafjinef:from';the LCD
section.
-~'.)
,,--
.'J
In this case, be careful naHa damage
tw~
LCD cables.
Installation
1 .. ,
Inst~1I
the upper,cabhlet
9n:d-1h~-lCD-,$e6ti,on
by reversing the
.
,di5ass~mbly proceq.LJre~:
' _ , _ :
_._~_
_ "
'When installi~g the)l~.mechanisrill· ~!3itl:1e_ -Shi~,tt
horizontally in
. parallel
t?-
th~ ang~e bott~m
and insert into the, LCD section.
2. Attach,
t~7'
l:Ipper and
lower
cabinets to the set.
3) LCD section
Disasse'mbly
<Caution>
For disassembly of the LCD u,nit
j
1;18
su're- to .follow the procedure
below. If not, the cabinli:!lmay be damaged.
1. Remove the' keyboajd.
2. Separate the
upper-cabinet
!rom the lower cabinet.
3. Remove the upper cabinet.
4. Remove the four rubber cushions fixed with duplex tape on the
LCD. seqtion, and remove the four screws which were covered
by the four rubbe(cushions.
-2-
5. Remove the fronfanci"r'ear-c.abihets
6f.the~LCD€fedti911.
-, ._
6. Remove the fixture which fixes the LCD section and the body.
7.
Remove the reflection plate of the backlight.
S.
Remove the fixing screws and the connectors otthe,
'.ilh)mil}~­
tion control PWB and the backlight convertor PWB, and
. remoV" the PWB·s .
Assembly
1.
Assemble the'
Lbb urilt-
by reversing
.the:
disa5's~mbly'
proce-
dure': ' . . . ,
1 __ . __ .",
Carefully check that there is no fingerprint on the LCD'secllon.
If there is, clean with a cloth and a1cohQI. :111e cloth must,be
fine and smooth, such as glass wiper
dOt·~.
.. . ' - , ...
2. Attach the upper cabinet to the set.
3. Attach the lower cabinet to the set.
4. Attach the keyboard to the set.
s. HD INTERFACE AND HD DRIVE
The HD drive unit can be replaced only in whole unit, but not in
part. When they are diagnosed to
be~A~fe9ijve
bytfrediagi1qs-
tic program, replace the whole unit of them.
4) Cautions
1. Although the CE-471A CRT adaptor board is an aption!ar the
PC-4700, it pomes standard for the. US version pC4ipo. For
more information about the Wiring" schematics and parts layout.
",ferto th,,·CE471A Service ManUal. '
2. Cosmetic sheet
Do not use the cosmetic sheet once removed. Be sure to use
the new one.
3. Deposit of- a paint dust on the back of, the
cabine~
may fallon
the
P;WB
when the machine is disassembled' and re-as-
sembled for servicing and it may then cause a machine mal-
function. To·avoidthis,the machine internal must be cleaned
whenever
the
machine is disassembled~