Marklin White Transformer(6646 32VA)

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Marklin White Transformer(6646 32VA) - How to open the Transformer to repair.

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V200-DIESEL		#1 Posted : 16 June 2025 13:58:54(UTC) Retweet
Joined: 29/04/2011(UTC) Posts: 2 Location: MICHIGAN		I'm trying to find out how to open the Plastic housing of the Marklin 6646 Transformer. Some of the the past discussions are abut 20 years old and have no specific info or photos. It appears they have a release from the bottom, but not sure and don't want to needless destroy the plastic case by guessing. Greatly appreciate any sound advice on getting this back in working order.

2 users liked this useful post by V200-DIESEL		marklinist5999, Jimmy Thompson
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Bigdaddynz		#2 Posted : 16 June 2025 14:12:27(UTC) Retweet
Joined: 17/09/2006(UTC) Posts: 18,774 Location: New Zealand		You open it the same way you would a 6021 (look at the 6021 repair thread for pictures). There are four small white lugs that hold the case together, two on each side. You get a small drill bit and drill a small hole in each lug. Insert a small screw into each hole, tighten the screw up a bit but not all the way home. Use a pair of pliers to pull the screw with the attached lug out. The case should then come apart, but be careful of any attached wiring between pieces. Reinstallation is the reverse process. The usual warnings about being carefull when working on mains voltage devices applies as normal. Any work done on one of these transformers is at your own risk.
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4 users liked this useful post by Bigdaddynz		marklinist5999, dickinsonj, H0, Jimmy Thompson
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marklinist5999		#3 Posted : 16 June 2025 14:30:44(UTC) Retweet
Joined: 10/02/2021(UTC) Posts: 3,947 Location: Michigan, Troy		Yes, like Bigdaddy nz says. Mine had a solder joint come loose for the power feed cord. Easy resolder fix. I used white car model kit or ho scale structure kits from Faller, etc. for the new hole plugs. Just cut off the excess from the exterior.

2 users liked this useful post by marklinist5999		V200-DIESEL, Jimmy Thompson
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V200-DIESEL		#4 Posted : 16 June 2025 15:12:36(UTC) Retweet
Joined: 29/04/2011(UTC) Posts: 2 Location: MICHIGAN		Originally Posted by: Bigdaddynz You open it the same way you would a 6021 (look at the 6021 repair thread for pictures). There are four small white lugs that hold the case together, two on each side. You get a small drill bit and drill a small hole in each lug. Insert a small screw into each hole, tighten the screw up a bit but not all the way home. Use a pair of pliers to pull the screw with the attached lug out. The case should then come apart, but be careful of any attached wiring between pieces. Reinstallation is the reverse process. The usual warnings about being carefull when working on mains voltage devices applies as normal. Any work done on one of these transformers is at your own risk. Thank you so much. For some reason I never noticed the plugs on the side and was focused only on the bottom (like the older metal blue ones).

4 users liked this useful post by V200-DIESEL		H0, marklinist5999, Jimmy Thompson, Bigdaddynz
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