Service manual
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pc-um
I Reference I
LS
I block
SPEC
Actual
UII
N
ote
SC7852 IDLE 3.3
mA
/4MHz 3.3rnA/3.58MHz
D&plnd
e
nt
on
\fIOS
1,
.
JMHzl
Operat
i
ng
3OmA/
4MHz
26
.
BmA
/3.
58MHz
LH5803
HALT
SmAl3
.8MHz
S.
5mA/2.6MHz
Not
applied
8t
this
t im
•.
Operating l
SmA
/3.
BM
Hz
10
.lmA/2.6MHz
LU57813P
Standby
so,.A
-
FOI"
timer
only
Operating
5.OmA/500KHz
3.1mA/307KHz
lR38041
Standby
IOIiA
-
Operating
10
mA
/
4MHz
3.25mA/l .3MHz
HD61 1
02
Su ndby
lS"A
-
Displaying
l00~A
-
AcC8l$ing
5OO.A
-
HD61203 1.
0mAI600KHz
O.
36mA/2
1
7K
Hz
TC8576F
lOmA/10MHz
1.2lmA/l
.229MHz
SC6976T0220
Su
mdbv
3.A
-
Accessing
,5mA{,MHz
6mA/4OOK
Hz
P'ROM
Standby
,OJ.lA
-
Aceessing
8mA/1MHz
3.
2mA
/400KHz
RAM
Standby
1.
0"A
-
Accessing
10m
A/1M
Hz
4.OmA/400KHz
Po
wer l
upplv
OFF 100,uA
-
lie
regulator
ICl)
ON 2.
OmA
-
Po
we
r
supply
Display
4.OmA
-
(
convener
le I )
SID operation
20mA
-
LCD bleeder O.
52mA
-
Major component
conwmption
power
8·5. Meas
ur
e
ment
check
The
quartz meter must be used in this measurement test.
Tolerance:
t
1.5
second/day under ambi
ent
tempera·
ture
of
25°±5°
C.
NOT
E:
Do
not perform
the
measurement test in the earlv
morning
as
the internal temperature may differ
even
if
the room ttlmperature
is
within
the
re-
quired l
im
its. The same
is
applicable
to
the
quartz
meter.
8-6.
Pow
er-off test
Press
the RESET switch
on
the back of the
unit
while
pressing
th
e
ON
/BRK key and check for
the
following:
Power does
not
turn
off
within ni
ne
minutes (typical is
ten minutes).
But, the power
tu
r
ns
off
within eleven minutes.
8-7.
Sho
ck
test
With
the display digits activated, lift up
the
display side
45
degrees, then
drop
it
on
a desk top.
Then, check
to
see
that
there any changes
in
the display.
-
19
-
8·8. Weak
banery
detection circuit test
(1) Make sure
that
the
machine operates normally with a
supply voltage
of
7 .OVDCtO.l v.
(2) Make sure
that
the alarm symbol lights up with a
supply
vo
ltage
of
6.0VDCt O.l
V.
(~)
Make sure
that
auto-power-off takes place when the
supply voltage
Is
5.4VOC
t O.l v .
(This
test
must be conducted under
th
e temperature
of
25°±5°C
or
79.2°±
10
°F
.I