Precautions For Repair: Module Qw-2634; Ac (All Clear) And Removing Of Module; Accuracy Checking - Casio STR-600 Service Manual & Parts List

6. PRECAUTIONS FOR REPAIR: MODULE QW-2634

6-1. AC (ALL CLEAR) AND REMOVING OF MODULE

1. Perform AC (ALL CLEAR) when inserting a new battery, or else the memories and/or counters may
give erratic displays.
Touch the AC contact and the positive (+) side of the battery or main plate with the metallic tweezers.
The contact should be made for about two seconds.
For 2 seconds after the AC operation, do not make any button operations on these modules.
2. On removing of the module from the case, please insert the precision screw driver between the module
and the case pointed by arrows.
Metallic tweezers

6-2. ACCURACY CHECKING

Check the accuracy of the module with the quartz timer after switching the module to "ACCURACY
CHECKING MODE".
The operations are shown below:
A) SWITCHING TO "ACCURACY CHECKING MODE"
While pressing B button, press E and D at the normal timekeeping mode.
Then all the segments are displayed and the LCD drive signals are changed to the static drive signal
of "32 kHz" so that you can check the accuracy with the quartz timer.
B) CANCELLATION OF THE "ACCURACY
CHECKING MODE"
Press any button except for E button.
Then the display is reurned to its original state.
NOTE: The "ACCURACY CHECKING MODE" will
automatically return to the regular mode
in 1 ~ 2 hour(s) without any operation.
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A
B C
D E
L
QW-2634