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iWantit ISBT 10013 is in very good condition, but won't turn on - have checked fuse in plug (13amp) and it works - it just won’t power on. These are no longer available so want to tinker with it to get it working. Once opened, what should I look out for?
I’m a complete novice, so would appreciate the techy experts advice.
Thank you
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Hi @sparky936
Does the standby power light turn on when power is connected to the speaker and it is switched on at the back and the Standby/Source button is pressed? Not sure from your question whether it did but then the speaker didn’t turn on after the button was operated again or the light wasn’t on at all.
Either way you will have to get “techy” with it.
Do you have a DMM (digital multimeter) and know how to use it?
If so:
Then disconnect the power from the speaker and then open the speaker to gain access to the internal circuit boards.
Locate the power board or maybe there is only one board (usually where the On/Off switch connects to and also the power cord) and check if there is a fuse on it near the power cord terminations. If so test that the fuse is OK by using the DMM’s Ohmmeter function and test for continuity i.e. a short circuit through the fuse. After that, again using the Ohmmeter, check that the wires in the power cord are also OK from the pins of the plug to where they are terminated in the speaker i.e. test each wire from end to end. Then prove that the On/Off switch is OK and has continuity when operated i.e. test the switch contacts are short circuit when operated
If all those tests are OK check the power board for any obvious signs of component damage i.e. heat stressed or burnt out components or leaking and bulging capacitors.
If you spot any or even not and are not quite sure, post some close up images back here. Here’s how to do this. Adding images to an existing question
If it all seems OK then you will have to begin live testing.
Be safety aware, live testing involves testing where exposed lethal AC voltage is present so if you don’t know how to do this safely then don’t do it! You can severely injure yourself and create more problems in the speaker than what was there at first.
Testing will also be difficult without the schematics (I can’t find any online anyway, you may be luckier) so it will take a fair amount of time unless the problem is obvious.
If not:
Contact a reputable, professional electronics repair service and ask for a quote to repair the speaker.
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