Re: 41CX: strange display problem Message #3 Posted by Vieira, Luiz C. (Brazil) on 18 Oct 2001, 7:13 a.m., in response to message #2 by db(martinez,california)
A hunch:
Is it possible that the COMMON connection for the other annunciators (PRGM, USER, G RAD, flags) is "lifted" (not connected) and, somehow, when ALPHA is lit, this connection is stablished by ALPHA potencial?
I have seen this kind of not-normal opperation in signaling panels using LEDīs and lamps switched by transistors, never in LCDīs. Sometimes, when both COMMON connectors are lifted AND stay connected each other, this may happen if switched voltage is not the same. 41īs LCD, as all others, operate with three voltage levels.
I would also guess bad internal display connections. Did any battery leak?
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