PC-UM10M
9-4. Current check and the low battery check.In this case, the power voltage waveform must not be broken as shown
in the figure (Fig-2).
[Caution]
? Before check of the current and low battery, be sure to savUnder thise t shteate, set the main battery voltage (+) from 6.0V to 0V, then
memory content to another unit.measure the backup current after 5 sec or more.
Current specifications
[Necessary tools]
SW1 holding jig (To operate the EL-9900, SW1 must be pressDied.splaying c)urrent350?A or less
OFF current40?A or less
B/U current3?A or above ~ 25?A or less
For example:
9-5. Clock Accuracy Check
5mm
With the set completely set (with the batteries installed), check that the
advancement is within the range below:
25mm
-3.0 ~ 0.0 sec/day
20mm
(conduction: Check environment temperature = 20 ~ 30°C)
Cut the battery cover9-6.Memory backup battery contact check
as shown
1 Install the operating battery and the memory backup battery.
2 Close the battery cover and perform the data initialize operation.
(At that time, connect the main battery of 6.0V and backup batt(Close the battery ery of3cover Sam.e as pressing the reset SW.)
3.0V to the set then attach the SW1 holding jig.)
3 Open the battery cover.
Press ?RESET? switch.
4 Use the check pad between BAT2 and GND to measure the backup
The display shows ?PRESS [CL] KEY TO CLEAR ALL DATAbattery voltage with a circuit tester.
PRESS [ON] KEY TO CANCEL?.
Specifications: BAT2 > 2.9V (at 20 ~ 30°C )
Press ?CL? key.
The display shows ?ALL DATA CLEARED
PRESS ANY KEY?. Press ?CL? key.GND
VCC
In this mode, measure the current during displaying.
Press ?2ndF? 3 ?OFF? keys to measure the current during OFF.
Hole for check pad
in the battery cover
Then press ?ON? key.RESET
Then set the main battery voltage from 6.0V to 5.0V, p3ress ?2ndF?
?OFF? 3 ?ON? key, and check that ?_? is displayed at the left upper cor-BAT2VBAT
ner.
Set the main battery voltage from 5.0V to 4.4V , 3 ?OprFFess ?2nd?F?
3 ?ON? key, and check that the display (Fig-1) is shown. Press ?CL?
key.
*When the memory backup battery is first installed, the system may
Set the main battery voltage from 4.4V to 3.6V, press ?ON? key andbe hung up. Never leave the unit only with the memory backup bat-
check that the set is not turned on.tery. (When the operating battery is installed and resetting is once
made, there is no problem.)
(Fig-1)
OKNGNG
6.0V
5.0V
4.4V
3.6V
(Fig-2)
EL-9900 NOTE FOR SERVICING
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ACEC
SHARP
