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Calculator fault: certain segments aren't showing on LCD

seanspotatobusiness

Sep 11, 2012
193
Joined
Sep 11, 2012
Messages
193
I have a Sharp EL-506V calculator and certain segments of the LCD figures are not showing. Is there a likely cause for this kind of fault?
 

davenn

Moderator
Sep 5, 2009
14,254
Joined
Sep 5, 2009
Messages
14,254
hi

yup several possibilities

1) signals no longer coming from the microprocessor
2) signals are coming from the processor to the display driver but the driver is failing
3) signals are coming from the display driver to the display but there are faulty segments on the display
4) connection faults between any of the above sections

a high probability it wont be repairable
have you opened it up ?
if so show us a sharp and well lit pic of both sides of the circuit board

cheers
Dave
 

Colin Mitchell

Aug 31, 2014
1,416
Joined
Aug 31, 2014
Messages
1,416
The fault lies in the connector strip. You need to add extra pressure to get the connector to touch both the PC board and the strips on the LCD module.
 
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