To Declan Moriarty. INET: [EMAIL PROTECTED] --
Technique one: Pulse your unit on and off at 1000 Hz. Probe every node with a high gain FET input audio amplifier digital probe and listen for anomalies. Technique two: If the nodes are lined up like an IC, then swipe the digital probe so it hits each node in rapid succession. This will cause the digital probe to make a chirping sound. If any node is drawing more current than the other nodes, it will color the chirp sound at that node. I learned that this is called voodoo electronics. Technique three: Make a shielded test probe with two tiny points less than 0.1 inches apart. Connect the test probe to a high gain FET input AC and DC amplifier. The test probe shield should be grounded at the end connected to the amplifier ground input only. The test probe shield should not be grounded to the circuit under test. A separate ground lead should connect the amplifier ground input to common bus of the circuit under test. Connect the output from the amplifier into a scope or meter. Poke the circuit board traces until you find a voltage anomaly. The higher the current passing through a circuit trace the higher the meter or scope reading will be. -----Original Message----- Here's one to tease yourselves over. I have a board to fix and for once, I do not know how to go about it. Good luck' Jeffrey Meade [EMAIL PROTECTED] -- Author: Jeffrey Meade INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB CHIPDIR-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
