Meestal niet de moeite waard maar als een nieuwe as niet te vinden is (geen standaard asje) dan maak ik er gewoon eentje zelf. Stukje messing in de draaibank en daarna een sleufje frezen. Kost minder tijd dan het internet afstruinen voor een nieuwe as. The plastic shaft was broken so I made a new … Lees meer
Wat zal ik zeggen, geen goede combinatie. Ik heb ook een behoorlijk aantal Bose 100V audiosysteem panelen voor deze klant gerepareerd. Een eenvoudig ding maar het gaf een flink probleem. Niet zo vreemd nadat ik het relais en de connector verwijderde. Gelukkig niet zo lastig om te repareren. What shall I say, not a good … Lees meer
This is the connector from a 1700 euro cable (Merlin Gerlin / Schneider) Just plastic and cat5 cable, a fine example of very bad engineering. The 3 “hooks” broke because the construction is very weak. After some fun time with my lath:
This scope is a bit confused. Is it a Fluke or a Philips, or both. Philips on the front, Fluke on the top of the cabinet. Not much wrong with it. It had starting problems, the PSU wined and there was a broken knob- shaft-potmeter. I made a new shaft for the potmeter, serviced the … Lees meer
Because I get more and more secutest for repair, I experimented with several fixtures. Secutests are a pain to work on because there is no room and there are dangerous voltages inside. There is a PCB with big relais: This is one of the many versions. The PCB hangs upside down in the cabinet. The … Lees meer
These burned things began their lives as resistors. The problem is the pcb is fried too. First step, make pictures and a sketch and then I mill away the burned section. Then I make an insert and glue that in. I connect the new pads to the rest and cover it with pcb coating And … Lees meer
Tĥis is the pcb from a G&M Secutest. It was not working like it should. The problem turned out to be some vaporized traces inside the 4 layer pcb, a LM358 with ventholes, a dead 555 from the boost converter, a dead TL082, a burned inductor, a blown fuse and 4 bad relais. The … Lees meer
A peltier powered dryblock from Isotech that stopped working. There was no current flowing to the TECs (peltier elements). That can be caused by a dead controller, dead PSU or dead TECs. They should have a very low resistance so that is easy to test first. I measured a few megohm. The once used here should … Lees meer
This one had a few fried resistors due to a short caused by damaged isolation from a wire. I first removed the resistors. The picture above is after cleaning with IPA. The pads are loose but not damaged. The black stuff is burned epoxy. You can see the structure from the, now epoxy-less, FR4 glasfiber. … Lees meer
Fluke uses a resistor divider to tell the processor in what position the switch is. It is made from a sort of carbon film. At the picture above you can see it. This meter has also a problem with a partial dead IC so a nice victim to practice my PCB transplanting skills. … Lees meer