Re: Impossible to fry 67 without battery inserted? Message #4 Posted by Victor Koechli on 23 Jan 2004, 6:13 p.m., in response to message #3 by David Smith
I second that. I have seen many classics, including 67s and 97s, being run off the charger alone for years, or even decades, with a dead battery in place or with no battery at all. It seems, although the 67 is electrically a Woodstock, that it behaves like a Classic here. I have also not seen the ACT chip problems in the 67 like in other Woodstocks.
Check for the obvious causes first, like contacts between the three boards, the power switch, and the bridge contact that connects the battery if the charger plug is not in place. Unplug the boards, clean the contacts, and reassemble.
Try to find out if power gets to the main PCB at all - the traces carrying the power are easy to locate. If you have power on the board, but not at the chips, the power supply is dead. There are other people in this forum who can help with circuit diagrams of the power supply.
Most likely, if you have come this far, your HP-67 will be alive. Keep us informed!
Cheers, Victor
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