(Topic ID: 241658)

Controlled Lamps not Working after Replacing Rectifier Board

By Pinslot

4 years ago


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  • 24 posts
  • 6 Pinsiders participating
  • Latest reply 4 years ago by Pinslot
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#5 4 years ago

Did you change the wiring at the transformer when changing the board? Are you set up for 115 volts instead of 230 volts? Your voltages sound low.

#7 4 years ago

I’m not sure about compatibility, but it looks like the few solder connections I see are not good solder joints.

#14 4 years ago

I don't think so. You need to read between lug 13 and lug 14 on the transformer. You should read around 7.8 Volts AC. Reading between points E9 & E10 would measure the same thing.

It sounds like you are taking improper readings. Reading E9 to ground, or E10 to ground will not give a good reading. They do not have a connection to ground.

For your 5.4 volt DC reading, you should have only J2 plugged in, then power up, then read TP1 to ground - you should see the 5 volts.

#16 4 years ago

Measure the voltage at the bridge rectifier ac inputs. It should be the 8 VAC. Next, measure the DC volts across the bridge. Should be the five volts.

Is the transformer assembly screwed back in place in the head?

Just a question: is the ground braid from the cabinet connected to the ground braid in the head?

#18 4 years ago

I can’t see the schematic for your replacement board, but since you know the rectifier is good, you will have to physically trace from the rectifier positive output to TP1. You may have a break or TP1 on the new board is not the 5 volt test point.

#20 4 years ago

Did you verify TP1 on your board is the 5 volt test point? Do you have a copy of the schematic?

#23 4 years ago

Glad to see you got it going. I would let the manufacturer or the seller know about the break in continuity on this board in case they are having issues with production/QA. There may be others with the same issue and not realize what the problem is.

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