Is is a Selectronic? Those I have found higher than nominal. Especially if having a slightly hot mains. Please measure the AC on the transformer connector on board. If its actually circa 18VAC then sink the Mosfets and it will be OK.
The CCS current has nothing to do with LEDS. Has only to do with the setting resistors in the 68//68 places. I would not run it below 40mA per rail.
Thanks Salas
Mosfets are a little bit hot, I think it's normal as they are not heatsinked.
What measures are required to verify that my DCB1 is Ok ?
Thanks Salas for your comments and tips 
I gave a try with my heatsinks, one shared for two Mosfets on the same side.
I've noticed that the 5 Leds where off while the heatsink is mounted.
Do I need to isolate the Mosfets with a pad ?
Mosfets, both 240/9240, near the 2x68R run hotter than the ones on LT7812 side.
I gave a try with my heatsinks, one shared for two Mosfets on the same side.
I've noticed that the 5 Leds where off while the heatsink is mounted.
Do I need to isolate the Mosfets with a pad ?
Mosfets, both 240/9240, near the 2x68R run hotter than the ones on LT7812 side.
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hi,
the thermal interface on the back of the mosFET is connected to the Drain of the mosFET.
If you connect a common plate/heatsink across two of them, you have effectively connected the two drains together.
At least on FET must be electrically insulated.
The one that needs to dissipate less heat can have a mica or insulating washer fitted. The higher dissipating FET can be bolted direct for better heat transfer.
the thermal interface on the back of the mosFET is connected to the Drain of the mosFET.
If you connect a common plate/heatsink across two of them, you have effectively connected the two drains together.
At least on FET must be electrically insulated.
The one that needs to dissipate less heat can have a mica or insulating washer fitted. The higher dissipating FET can be bolted direct for better heat transfer.
