Casio PX-780 Service Manual page 19

4-11. Speaker NG
Check the connection
of CN11.
NG
Connector is loosely
connected.
4-12. PCMCIA Card NG
Replace the MAIN PCB and check again.
4-13. SD Card NG
Replace the MAIN PCB and check again.
4-14. Charge LED NG
Check the connection
of CN11.
NG
Connector is loosely
connected.
OK
FFC
damaged?
No
OK
FFC
damaged?
No
Yes
After replacing the
Speaker, check again.
NG
Yes
Replace the PW PCB
and check again.
NG
– 17 –
FFC is defective.
OK
Speaker is defective.
MAIN PCB is defective.
FFC is defective.
OK
PW PCB is defective.
MAIN PCB is defective.