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HP Forum Archive 13

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HP-97 Printer
Message #1 Posted by Howard on 10 Sept 2003, 1:15 p.m.

Hello All. I'm hoping somebody can help me with my HP-97 printer.

The problem is that the top row of pixels does not print. It appears to be an alignment problem but I cannot see any adjustment.

Can the problem be fixed?

Thank you in advance.

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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