Casio TK-6500 Series Manuale di risoluzione dei problemi - Pagina 8

Sfoglia online o scarica il pdf Manuale di risoluzione dei problemi per Registratore di cassa Casio TK-6500 Series. Casio TK-6500 Series 19.

Trouble shooting ECR V1.01

3) Check the poor connection between CPU and RAM or Flash ROM1.

Specially, check the Flash ROM1 connection to re-solder the all lines.

4) Check the RAM1 or Flash ROM1 chip enable signal.

5) If the signals of the address bus and the data bus are not stable (Ex: After some time,

the all signal becomes GND level or so on.), replace "IC10" of the CPU to new one.

[ Flash ROM1 chip enable signal ]

Flash RST

Flash ROM1 chip enable

Flash1 CE

Flash ROM1 chip enable signal

Flash ROM1 IC6

Flash ROM1 pin No.9

Address bus

Flash ROM1 chip enable

Pin No.3 of IC25 (74LV00)

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