Sharp EL-8130 User manual

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1. FOREWORD
In
addition
to
the
ultra-thin
7
mm
calculators
which
are
already
having
high
reputations
in
the
market,
the
model
EL-8130
now
made
public
by
Sharp
is
also
a
full-fledged
8-digit
calculator
that
is
only 5
mm
thin.
This
super-slim
calculator
is
still provided
with
various
functions
such
audio
input
verifier
and
automatic
power
off
circuit,
etc.
TABLE OF CONTENTS
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2. SPE CUICAMONS: : fede. 6 ast can aS ]
Bc DOI ViCI Oi etn eo ee Ee A ee Re 2
4. Circuit Diagram ............. 5
5. Parts & Signal Position......... 6
6. Signal Wave Form............ 6
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Tone emitting keys
2. SPECIFICATIONS
+ tat Excess
EI GI Ey
aiteitalia
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Display: FEM type liquid crystal display
(8 digits for the numeral part, 1 digit for the symbol)
@ Operation capacity: 8 digits
@ Memory: 1
@ Power source: Silver oxide battery (G-10 x 2 or (SR-1130) x 2 usable time 600H.
(Please note that only Union Carbide model 389, and Ray-O-Vac
model RW49 or equivalent should be used.)
@ Dimensions: 68(W) x 4.9(H) x 124(D) mm

3. SERVICING
3-1.
Disassembly
and
reassembly
of
the
set
Being
only
5
mm
thin,
this
calculator
requires
great
cares
when
disassembled
and
reassembled
at
the
servicing.
In particular,
pay
attention
not
to
give
the
liquid
crystal
and
the
buzzer
a
strong
force.
@ Disassembly
l.
ny wh
Remove the screw located at the center of the bottom cabinet to take out the bottom
cabinet. The chassis will then be removed together with the top cabinet.
. Pull out the two batteries.
. Carefully peel off the black masking sheet which is applied to the chassis.
. Carefully peel off the tape (silver color) which is applied to the chassis.
. The chassis is being fixed by 13 pawls which are located on the top cabinet. By using a
pincettes, straighten each of these pawls, then the chassis, top cabinet, liquid crystal and
anisotropic tape will all be independent from each other.
. Remove the display spacer from the top cabinet, then the filter will also be removed.
Note: Different from the above, as for the sets up to 250,000th unit, the display spacer
cannot be removed since it is directly fixed to the top cabinet. Refer to ““Reasembly
4” described later.
_
The
chassis
and
PWB
are
being
attached
to
each
other
by
means
of
both-side
tape
which
is
applied
around
the
keys
OFF
and
ON/C.
Holding
the
chassis
by
one
hand,
carefully
remove
the
PWB
by
another
hand.
.
Remove
soldered
leads
of
the
PWB
(at
three
portions).
. Remove battery terminai.

@® Reassembly
For the reassembly, it is so each to take the procedures reverse to those for the disassembly.
However, it will reguire the following to be taken in consideration.
1. Leads between the battery terminal and the PWB should be settled as peered ¢ in the
sroove of the chassis.
2. The PWB and liquid crystal should be aligned exactly by means of an anisotropic tape.
Take care not to touch their joint by finger nor to soil it with impurities.
Key rubber (ON/C)
Key rubber (OFF)
Red
“SN
: Pay $4
t
q ..
r spacer
cr
onl
3. As shown in the (Fig. 3), the key rubber and switch spacer should be set exactly matching
the respective bosses of the chassis.
4. Change in the method to attach the display spacer and filter.
(1) Up to the 250,000th unit
Caulking
Display
spacer
Aluminium frame
Display mask Filter _
* Since the display spacer is directly caulked to the chassis, it isnot possible to replace
the filter with a new one.
(2)
After
the
250,001st
unit
Display
spacer
Caulking
a F Aluminium frame
FI Display mask ey &
= es aes ey 2 ee
CMLL | aaa ME TID 6
Fig. 4 Filter Display angle
* With this change, it becomes possible to remove the display spacer.
As for the sets up to 250,000th unit, it can been seen from the above that the display spacer
and filter are fixed to the top cabinet and so if you find some trouble in them at the servicing,
it is recommended to replace such parts with new ones which are applicable to the sets after
250,001 st unit. The Parts List and Guide carry only the new parts. (There is not interchangeability
at all among the filter, display mask and display spacer in (1) and those in (2).)

3-2. Cautions on servicing
2-1.
Soldering
on
the
piezo-electric
buzzer
In
this
work,
be
sure
to
use
a
low-fusing
point
solder.
Iron
tip
temperature:
190°
+
10°X
Soldering time: Less than
e
Soldering
position
3
seconds
CF
gp
Piezo-electric buzzer
2-2 Control adjustment
Leving the key ON/C be depressed, keep Vin to 3.15 V to make surethat the signal A> is
within the range of 2.9 ms < T <3.1 ms. If the above value is not satisfied, adjust it by using
the control RVR-M5513QCZZ. Yet, if this adjustment is not statisfactory, change the position
of jumper wire to the opposite side of the resistor 330KQ as shown in the figure herof and
again proceed with the adjustment.
More simplanize adjustment |
of
above,
we
may
ask
you
VE
.
to
adjust
the
Volume
to
be
a
“
:
most nice buzzer sound.
330Ka+ 10%
YW

4. CIRCUIT DIAGRAM
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1000
100 PF SR1130x2

PARTS & SIGNAL POSITION
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™]
. PARTS LIST |
DCABBO337CSzz N J AV
PFiLW1!154CCZZ J
PGUMM | O86CCZZ
PGUMM 1081CCZZ
PGUMM | 079CCZZ
DUNTKO338CSZZ_ | PWB unit _
PTUBX 1002CCZZ
13.) QTANZ1159CCZZ
19 Buzzer angle
0 DCABAO340CSZZ_ | Bottom cabinet (with mylar sheet)
PPAPMIOO3CCZZ _ | Memo paper
UBAGZ 1083CCZZ | Book type case (Export)
SPAKC2365CCZZ
|
Packing
case
(Japan)
|
SPAKC2366CCZZ | Packing case (U.S. A)
SPAKC2434CCZZ | Packing case (Other countries)
TiINSJ1980CCZZ | Instruction book (Japanese)
TiNSE!I981CCZZ | Instruction book (English) |
TiNSMI982CCZZ | Instruction book (E, F, G, S)
GANJ1O25CCZZ | Guarantee card (Japan)
LSTS!IOO5CCZZ | Service list (Japan)
HiLi3O028F/—| iS: (Li-3028)
RC—SZIOO6CCZZ | Capacitor 0.1 uF
RC—SZ1IO0O07CCZZ | Capacitor 1uF
RC—KZ!1O07CCZZ | Capacitor 100PF
VRC—MT2BGIOIK Resistor 1/8W 1000hm
VRC=MT2BG334K | Resistor 1/8W 330Kohm
RVR—M5513QCZZ_ | Volume resistor 500Kohm
VHD!ISI588LI—|! Diode 151588L1
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8. PARTS GUIDE