General Guide; Turning On Or Off; Battery Replacement; Auto Power-Off Function - Citizen SR-270X College Instruction Manual

General Guide

Turning on or off

To turn the calculator on, press [ ON ]; To turn the calculator off,
press [ 2nd ] [ OFF ].

Battery replacement

The calculator is a dual power system which is powered by one
button-type battery (G13 or L1154) and a solar cell. If the display
becomes dim and difficult to read, the batteries should be replaced
as soon as possible.
To replace batteries:
1) Remove the screw and the battery compartment cover.
2) Remove the old battery and insert a new one with polarity in
correct directions, then replace the cover.
3) After changing battery, please use a pointed object to press the
reset hole at the rear of this unit.

Auto power-off function

This calculator automatically turns off when not operated for
approximately 3~9 minutes. It can be reactivated by pressing [ ON ]
key and the memory, settings are retained.

Reset operation

If the calculator is on but you get unexpected results, press [ 2nd ]
[ CLR ] in sequence. A message appears on the display to confirm
whether you want to reset the calculator and clear memory contents
after selecting [ 3 ].
C lear?
1: S etup 2:M em ory
3: A ll
To clear all variables, pending operations, statistical data, answers,
all previous entries, and memory, please press [ = ]; To cancel the
reset operation without clearing the calculator, please press [ AC ].
If the calculator is lock and further key operations becomes
impossible, please use a pointed object to press the reset hole at the
rear of this unit to release the condition. It will return all settings to
default settings.

Contrast adjustment

Pressing the [
( CONT ) keys in sequence can make the contrast of the screen
lighter or darker. Holding either key down will make the display
become respectively lighter or darker. After finishing your setting,
press [ AC ] to exit.
File name : SR100DCollege_English_text_0531_final.doc
version : 10/05/31
R eset All?
[ = ]
[ 3 ]
[A C ]
] or [ ] following [ 2nd ] [ SET UP ] [
E – 3
: Y es
: C ancel
] [ 5 ]