(9) Problems detected at the touch panel test
Problem Cause Suspected unit
LCD shows an error
message.
Touch panel has low
detection accuracy.
Op-ports 1 and 2
(10)Problems detected at the LED/Conventional key test
Problem Cause Suspected unit
LCD shows an error
message.
Abnormal signal is detected
when a key is pressed.
Op-ports 1 and 2
Reverse display is not
obtained although a key is
pressed.
Signal line for key data is
broken, or the switch is
damaged.
Operation control unit
LED does not light. LED is damaged. Op-ports 1 and 2
Control signal line from the
LED controller to the LED is
broken.
Operation control unit
Buzzer does not sound. Piezoelectric buzzer is
damaged.
Op-ports 1 and 2
Control signal line is broken. Op-ports 1 and 2
Controller is abnormal. Operation control unit
(11) Problems detected at the CMOS RAM test
Problem Cause Suspected unit
Operation based on the date
and time settings is abnormal.
CMOS RAM is abnormal. Operation control unit
Time settings are cleared. R.T.C. backup is abnormal. Operation control unit
(12) End processing
Problem Cause Suspected unit
[System will be reset]
remains displayed.
The system cannot be reset. Operation control unit
A172/A199 6-54 SM
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