|
Untitled Page
ARCHIVED FORUM -- April 2007 to March 2012 READ ONLY FORUM
This is the first Archived Forum which was active between 17th April 2007 and
1st March February 2012
Search
-
You will always get the most precise reading at the lowest possible setting of the meter. Obviously a serious short somewhere and we will have to isolate some circuits to diagnose further. On the large blue capacitor, there's usually a bunch of leads going to one of its tags and only one or two going to the other. Try desoldering the large bunch
-
Are you sure you got all three belts on correctly ? The square belt next to the flat belt can often cause confusion. Martin
-
Yes, that's the one. Does it read a steady zero ohm across the cap when mounted ? Also check the output stage transistors, all four across collector/emitter and across the two output caps (800uf) at the rear panel. Martin
-
OK, you can solder back the capacitor 514 now. It seems to be OK. The output stage transistors could be worth checking too but I doubt the fault to be here because the resistance is so close to zero ohms. I would expect to see the emitter resistors reflected as the minimum ohmic value if an output stage is shorted. You can desolder one side of the large
-
Does the cassettedeck motor run ? The capstan ? Martin
-
Det er hverken dioder elelr lysdioder men derimod glødelamper. Og det er en vanvittig spænding, de kører på så de er ikke nemme at finde. Desuden er de loddet i, så du skal have lidt elektronik værktøj og lidt kendskab til at bruge det, for at skifte dem (eller bring apparatet til mig). Jeg har et par
-
OK, now desolder one pin of capacitor 514, lift it out of the board and measure again, this time we need two readings; On the board tracks and directly across the capacitor. Martin
-
Most likely a short somewhere. Let's have an ohm reading (unpowered of course) across capacitor 514. It's a 64uF electrolytic capacitor sitting at the rear center of the amplifier board, providing a good and easy place to check amplifier voltage, easy to measure across from the solder side. Martin
-
Welcome to Beoworld ! What a nice radio ! The first thing would be to check if there is any voltage anywhere. I suggest measuring AC voltage on the rectifier primary first. Then DC on the secondary side. Let us know the results. The dial lamps are good indicators for voltage and transformer function so I suggest you make sure two good ones of correct
-
|
|
|