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Welcome Licorice Pizza (LP) lovers! Setup guides and Vinyl FAQ.

RE: Linn LP 12 problem

Linn Valhalla boards are on 24/7 as long as the table is plugged in. Switch merely cuts the power to the motor, but board remains live.

The Valhalla is a sort of Ac regenerator. Without the motor on the board merely builds up a lot of heat since it is generating AC with nowhere to go.

1. There is a fuse on the Valhalla board. If no light goes on posiby the fuse is blown ( rare but it can happen)

2. Usual failure mode is the three 47 uF 250 volt axial electrolytic caps. You will see obvious signs of leakage from the led nds where it enters the cap body. They will need to be changed. At the same time you should also change the remaining 6 or 7 electrolytic caps on the board as they are also on the verge of going bad.

3. There are two 15K 5 watt dropping resisters. Usually you will see "burn" marks under them as they run very hot. Turning the board over sometime you will see discolored and corroded solder joints. I would change them and be sure to place them well above the board to allow for more heat dissipation. Be sure to examine the tracs carefully for signs of corrosion, make repairs as needed by soldering over a wire after scraping some of the conformal coating off.

4. If TT still doesn't work, the issue is the driver transistors. There are three of them mounted on heat sinks. The numbers are clearly visible and Linn used several different types over the years.

5 I have come across Valhallas where the normally green boards are almost totally black. On several the chip sets were damaged, and the work to replace them and other semiconductors was rather prohibitive. Install a Linn Basik power supply ( Vinylengine has schematics), and use a Phoenix engineering Falcon PSU, which is just as good as the Linn Lingo, IMHO, and far cheaper. The falcon can not be used with a Valhalla, however.


good luck


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