Sharp PC-1600

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PC-1600
I Reference I
LSI block
SPEC Actual use
Note
SC7852 IDLE
3.3mA/4MHz
3.3mA/3.58MHz Dependent on q,OS(1.3MHz)
Operating
3OmA/4MHz 26.8mA/3.58MHz
LH5803 HALT 8mA/3.8MHz 5.5mA/2.6MHz
Not applied at this time.
Operating
l5mA/3.8MHz 10.3mA/2.6MHz
LU578l3P Standby 50µA
+-
For tim er only
Operating 5.0mA/500KHz 3.lmA/307KHz
LR38041
Standby 10µA
+-
Operating
10mA/4MHz 3.25mA/l.3MHz
HD6l102 Standby
15µA
+-
Displaying
100µA
+-
Accessing 500µA
....
HD6l203
1.0mA/600KHz O.36mA/217KHz
TC8576F
10mA/l0MHz
1.23mA/l.229MHz
SC6976T0220 Standby 3µA
....
Accessing
15mA/1MHz 6mA/400KHz
P'ROM
Standby
10µA
+-
Accessing 8mA/1MHz
3.2mA/400KHz
RAM Standby
1.0µA
+-
Accessing
10mA/1MHz 4.0mA/400KHz
Power supply OFF
100µA
<-
(IC regulator IC3)
ON
2.0mA
....
Power supply
Display
4.0mA
+-
(converter ICl )
SIO operation
28mA
....
LCD bleeder
O.52mA
+-
Major component consumption power
8-5. Measurement check
8-8. Weak battery detection circuit test
The quartz meter must be used in this measurement test.
Tolerance: ±1.5 second/day under ambient tempera-
ture of 25°±5°C.
NOTE: 00 not perform the measurement test in the early
morning as the internal temperature may differ
even if the room temperature is within the re-
quired limits. The same is applicable to the quartz
meter.
8-6. Power-off test
(1) Make sure that the machine operates normally with a
supplv voltage of 7.0VDC±0.1 V.
(2) Make sure that the alarm symbol lights up with a
supply voltage of 6.0VDC±0.1 V.
(3) Make sure that auto-power-off takes place when the
supply voltage is 5.4 VDC±O.l V.
(This test must be conducted under the temperature of
25°±5°C or 79.2°±10°F.)
Press the RESET switch on the back of the unit while
pressing the ON/B RK key and check for the following:
Power does not turn off within nine minutes (typical is
ten minutes).
But. the power turns off within eleven minutes.
8-7. Shock 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 displav,
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