Electronic apparatus

Details Electronic apparatus Electronic apparatus

1999-07-08

2000-11-07

Lefkowitz, Edward

Communications: electrical

Condition responsive indicating system

Specific condition

340653, 340687, 361 68, G08B 2100

Patent

active

061443050

ABSTRACT:
An electronic apparatus is provided that can eliminate unlawful cartridges while preventing a malfunction by checking whether there is a short-circuit of pin terminals at the time of turning on the power source and conducting further improved security checks. The electronic apparatus has an electronic apparatus body 2 and a cartridge 5 to be detachably mounted to the electronic apparatus body 2. The cartridge 5 is equipped with a connector having a plurality of terminals and is connected to the electronic apparatus body 2 via the connector. The electronic apparatus body 2 outputs a first and a second short-circuit detecting signal for conducting a short-circuit detection of a circuit portion connected via the plurality of terminals. The cartridge 5 receives the first short-circuit detecting signal and the second short-circuit detecting signal via the plurality of terminals and determines whether the circuit portion is short-circuited or not based on the received first and second short-circuit detecting signals.

REFERENCES:
patent: 5179343 (1993-01-01), Chishima et al.
patent: 5179494 (1993-01-01), Matsubara
patent: 5341282 (1994-08-01), Brambilla et al.
patent: 5406260 (1995-04-01), Cummings et al.
patent: 5600300 (1997-02-01), Povilaitis
patent: 5786769 (1998-07-01), Coteus et al.

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