Sharp PC-E500 - Servicing Notes and Procedures; Main PWB Replacement

8.
Current
consumption
check
.
DC
+5.0V
is
supplied
to
11-pin
connector
No.2
pin
(VCC)
and
OV
to
No.3
pin
(GND).
ON
(BASIC
mode
">"
is
displayed);
3.24mA
or
less
OFF
(Power
off);
64:4
or
less
OS
Power source:
eo”, Current:
Actual use (Max.)
$C62015801
(CPU)
RUN
~
4=2304KHz
4.2mA
e
During
display
2202A
e
OFF
SpA
e
LH5320x1
(2Mb
ROM)
RUN
tac=120ns
7OmA
f*#306KHz
4.59mA:
:
HLT
1SpA
&
e
HM62256LFP—12SLT
RUN
tace120ns
7OmMA
fei
53kHz,
1.29MA
(82KB
RAM)
HLT
100pA
-
PC—ES00
9. Note for servicing
9-1.
Battery
holding
cushion
attachment
1~1.5
Battery holding
Reference
,
cushion
Battery lid
9-2.
Battery
holding
cushion
attachment
Reference
Reference
Bottom cabinet
Battery hoiding cushion
PC-E500
9-3. Battery replacement label attachment
Bottom cabinet
i}
Battery
replacement
caution
label
(A)
TLABH1266ECZZ |
* Must be free from tilt.
9-4. Shield tape attachment
Shieid tape A
ae
-Reference
Note:
When
attaching
to
the
boss
ss
section,
attach
neatly
along
the
boss.
ute
Shield
tape
vale
|
Bottom
cabinet
Attachment
procedure
boss
Shield
tape
A
1)
Remove
the
separation
paper
in
side
B,
and
bend
section
C
and
D
as
shown
below.
2) Fitthe A side with the reference, and paste the B side.
3) Remove the separation paper, and attach the tape.
Q)
«~ Fold.
Adhesive side
4)
Attach
the
three
boss
sections.
(Fit
the
boss
holes
with
the
shield
tape
holes.)
5) Attach the tape so that there is no slack.
Shield tape B
1) Bend E section. (Similar to C section.)
2) Fit with the reference and attach so that ai and a2 are even.
3)
Attach
the
boss
section.
(Fit
the
boss
hole
and
the
shield
tape
hole.)
:
4) Attach the tape so that there is no slack.
\
9-5. Main PWB replacement procedure
@ Press the OFF key. (If a RAM card is installed, remove it.)
@® Switch the select switch from A to B.
@ Replace all the four batteries with new ones.
@ Press the RESET switch.
® Switch the select switch from B to A. {Install the RAM card.)
—
Arm®
—