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Marantz 1040

Oh and just one other question if I may. The power light i originally tried to revive now doesn't turn on on the dim bulb test. It that normal or has that power light bulb died during the power supply blowing up
 
Its the only one I could get. Eurolux. Everything else is LED. Is there a specific wattage I should try get
 
Is that an incandescent bulb? What watt? If it’s LED, it won’t give you the protection you need from a DBT. Must be incandescent, at least 60W.

Edit. Never mind. Somehow missed the conversation above with Pete.
 
JRM said:
No smoke or blown fuse at this point.
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DBT looks a little bright, what wattage is the bulb? The bulb should be bright for 1-2 seconds and then go dim if you have no shorts. If you have shorts and the bulb stays bright and the bulb is absorbing the extra current draw and saving your unit from smoking. I wouldn't hook it up to the main power just yet.
 
Hi Rich. Bulb does give a bright flash and goes dim immediately. Just like what you are describing above. The bulb filament is just a little red. Nowhere near what I would call light.
 
Ok Guys. Managed to get my hands on a 60w incandescent bulb after much searching (pic attached). Put into dim bulb tester and i get a bright flash on switch on and then goes off. Filament on bulb not even slightly red like the last bulb. Please see pics attached. Will wait on you guys for next step.
 

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Checked for a blown fuse and fuse is fine. It does that on switch on. Try again and not even a flash on bulb. Leave off for a short while and power on and bulb give bright flash and then off. Im assuming this is a good sign with regards to the amplifier but will wait on you guys.
 
:banana:

What about the amplifier power light. It doesn't come on. Is it coz of the dim bulb tester or the bulb burned out on the short out with the caps or is there something I need to look for.
 
JRM said:
Im assuming this is a good sign with regards to the amplifier
Click to expand...
It appears to be a good sign (the unit doesn't light the bulb if you turn it off and then on again because the large caps you installed are fully charged when you let it sit the caps discharge and this is why the bulb lights again after sitting idle for a time). You should be able to use a DVM and check the bias and dc offset and if they prove within limits, hook up a source and speakers. As always with the DBT connected (think of the DBT as your safety net until the unit is ready for line voltage). Once you are satisfied that the unit is within spec and plays with the DBT, you should recheck the measurements on line voltage.
 
Hi Rich. Thanks for the advice. Sorry for asking but how and where do I check the bias and DC offset on the unit. I've come this far and don't want to mess it all up.:dunno:
 
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