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Akai GX-255 - Reel To Reel Tape Deck - Repair And Restoration Akai GX-255 Repair And Restoration Almost every vintage unit needs to be disassembled for cleaning and to fix existing problems. This Akai GX-255 tape deck is no exception. The tape path of this Akai GX-255 reel to reel is a mess and will need to be cleaned before any testing is done. I had to manually turn the reels to get the tape off of the deck. The rewind torque of the motors could not overcome the sticky tape. With the pinch roller removed from this Akai GX-255 open reel tape deck I can get it cleaned up.
John Deere Gx 255 Service Manual
Almost all vintage reel to reel repairs or restorations involve a lot of cleaning. Using cleaners made for tape units is the best thing to use.
After using some tape unit rubber cleaner the pinch roller from this Akai GX-255 is looking much better. If you lay the Akai GX-255 on it's back it will be easier to clean the tape path. Look at that tape path! Has it ever been cleaned? T The entire tape path was a mess. When you have a mess like this you must clean it up before doing any testing.
This kind of mess will take awhile to clean up. Just keep cleaning until your Q-tips are perfectly clean. I used Lasermedia CL-100 to clean the tape path during this Akai GX-255 repair and restoration. It's not an inexpensive cleaner but it works well.
Lx255 Service Manual
As long as your Q-tip looks like the one shown in the picture below you keep cleaning. Once the Q-tip is clear then you are good to go.
Cleaning up the tape path when it's this dirty will take some time but this Akai GX-255 will never be able to perform well without it. I've made good progress with getting the tape path cleaned up. I'll go over the tape path one more time to make sure that I've gotten everything.
I've got the tape path all cleaned up and it's about to do some bench testing of this Akai GX-255 reel to reel tape deck. Once again always clean up the tape path of any tape unit before testing. Oil painting colour mixing guide. Many times problems can be solved by just cleaning. Another area that needs attention during any vintage stereo repair or restoration is the cleaning of the pots and switches. In some units the pots and the switches are in a difficult position to get the deoxit straw into. The pots in this Akai GX-255 is one of those units. You can bend the deoxit straw to help get the spray where you want it.
I have collected various straws that I have bent in different shapes. You want to get the deoxit into the pot and not all over the chassis. Deoxit is a great product but it can create a mess if you spray it everywhere.
I have removed the back cover of this Akai GX-255. This unit has a direct drive capstan assembly. No rubber capstan belt to worry about. I found that either selecting forward or reverse play would not engage the reel motors. A defective bridge rectifier was causing the problem. This defective bridge rectifier(D35) which is now removed supplies DC voltage to the reel motors and was causing fuse(F4) to blow.
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I did not have a direct replacement available but I did have a bridge rectifier that would get this Akai GX-255 playing music again. I had to do a little leg bending but the replacement bridge rectifier fit in nicely. Now this Akai GX-255 plays in both directions. During further testing I found that there was an issue with very low audio on the right channel during playback. This Akai GX-255 reel to reel tape deck has 2SC458 transistors.