Re: HP-97 Printer Message #2 Posted by David Smith on 10 Sept 2003, 5:39 p.m., in response to message #1 by Howard
There are three likely causes (in order of probability):
1) A burned out dot in the printhead. Bad news. Only replacement is from another HP91/92/97. If you check the resistance of the print head signals, you should see around 10 ohms to ground for each one. An open circuit is not good.
2) A bad driver transistor. Good news is the transistor array chip is a standard off-the-shelf part.
3) A bad cable trace or connector connection. Cable trace may or may not be fixable depending upon where it is bad.
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