Sharp GF 3700 Front Top Input side Back with label Tuning with AC/DC input And already took five screws out the back To get that view See if you can tell me what I'm going to try and do next. Other than making the cassette deck work, I need to transfer what part and looks like it will fit because these are nearly identical. I just realized I need two parts. I hope I can transfer both of these. Last picture of this grouping I have to pull off these two wires for the speaker. Here's a picture I put magic marker on the positive wire but both are marked on the circuit board positive and negative speaker This going to be interesting repairing this I hope.
The bottom one the stereo. What I need is four gears off of the bottom one to replace into the mono one which came with the radio and in there I think some springs are missing as well from the mono one which I can possibly take off of the stereo one and then after all is said and done if I can get it repaired. It's not going to be worth very much because who wants this? I saw somebody asking one for sale for 50 bucks but I didn't delve into it. This just got one speaker. It's just a overbuilt cassette player. Whole lot of parts to make it play and have music search.
Yea the mono's don't get the same respect as stereo but I love them especially the GF Series. You already know that those mid to late 70's models are elbow stretchers and packed full of electronics.
Okay, I've now installed a 130 mm flat belt approximately 3 mm wide and I've installed the capstan rubber tire for the take-up reel You only need to remove the three screws on the left. Do not remove the two screws on the right cuz that holds the solenoid and you don't need to remove that. You should be able to see in the center of this picture, the rubber tire in the housing That will drive The idler tire which I have yet to transfer from the other donor stereo mechanism. Let me show you a picture of that. And the upper part of this above picture you can see the standalone donor deck and on the right hand side there's two white Wheels along with the smaller white wheel. I need to remove the c-clips from those three wheels along with the c-clip from the rewind spindle and hopefully not lose those and I will try to do that inside of a plastic bag and then transfer those four parts over to this mono deck and hopefully it all works This is my project for right now. As later I will be figuring shipping for something else as it's too hot right now outside it's 100° in the shade LOL Okay I just got all those off and now I've got to change the tire cuz I have a new tire to put on the idler and then transfer these parts over. Here's a picture I'm going to clean these parts with denatured alcohol and then reinstall and we'll see or hear. I finally got the old tire off of the wheel. I'll show you a picture of that with the new tire. Not much of a difference but hopefully you can see on the right is a new tire The old tire is hard. The new tire is pliable
Well that took a long time and a lot of patience and I had to use three of my c-clips that I got from Grainger. Now I just got to go find belts for the the auto stop and the tape counter can you feel the excitement? It has been resurrected? The only question now does it work and can I play a cassette?
90 mm for the auto stop belt Wonder what the counterbelt will be The counter belt is 10 mm or 4 in Yes it mounts on the take-up reel This way. it doesn't mount on the rewind as there is a plastic pole in the way.
Well here I am thinking I have it all ready to plug in and play so I went and put deoxit all through it on all the switches and potentiometers and everything like that and plugged it in and hit hit rewind and it wouldn't spin so that I looked at it again from underneath and noticed that the main rubber drive wheel is underneath where the flywheel is underneath. The plate that you don't notice or think about wasn't in that one. Luckily I have a donor so now I'm in the process of changing out That idler tire that drives off of the flywheel that in turn drives two gears that drive either the fast forward or rewind and so now that I'm about to get the tire off I'm going to go see if I have a replacement tire to fit it because I don't think I've ever changed this tire before on any of the other sharp machines that I have. And I do know I have a fair selection of tires so here's a picture of my in progress taking the other old tire off of the donor and about to go well anyway I am pointing to where the new tire should go or the old tire and in the center of the picture you should be able to see the old tire. I'm about to get off of the geared jackshaft and all that little collection of gears. Is it underneath the flywheel?. I finally got to my tires and I found two different ones in brand new packages that fit, I think I haven't tried either one yet and this is a it-42 according to the sheet here. Inter sheet there is no measurements and the red EVG package which is prb has it listed with decimal places and then the other packages listed in millimeters so it's a three-way guess as to what really fits which boggles the mind here means you got to get them all and try them all. Okay so the OD on this one is just a fraction bigger and the ID is just a fraction smaller? I really can't measure it cuz I don't have a micrometer And now the other one. The OD is definitely a fraction bigger and the ID is also a fraction larger. Again, I wish I had a micrometer So between the two of these I'm going to go with the one that has just a slightly larger OD, which is the one I'm pointing to versus the other one that's quite a bit larger in a fraction. I mean there's not a you could use either one, but I'm going to use the one that's closer to the original size so here Next I have to carefully take apart the back side of this. I hope I don't have remove the flywheel although I think I do. Geez that's going to be fun. Hopefully I can get that thing out without having to take the flywheel out and then be aware of all the springs and then put this tire on and then we'll try it again Well I had to remove the flywheel to get the plastic thing out and when I got the plastic thing out I found out that the idler wheel sits on a spindle which has a cracked shaft. I'm sorry not the shaft but the receptacle that the shaft goes into is cracked and it won't hold it in place. So that means now I have to change out the entire mechanism that holds the little gears and all that because the little shaft thingy broke off and it won't stay in place. This is turning into a minor nightmare. As you can see I had to remove the flywheel again and all its related bits and pieces. So now I have to change this oblong white plastic piece with all these rotating parts and springs and yada over to the mono unit from the stereo unit. This is terrific because I do have a donor.
For those of you that have never repaired a sharp GF cassette deck, you got to remember to have all these fancy little parts in them so I have it all together and I can make it. I don't even know I can make it. Rewind but notch fast forward and everything works almost that I discovered. Why it wasn't allowing it fast forward because this little plastic piece was missing which goes right here But it goes underneath the white gear holder thing like this Luckily again I had a donor and I got it off of the other one. Then I plugged it in. Tried to play it and it wouldn't play. Turns out that the Play spindle was frozen with grease so I had to break off the old old clip. Remove it. And run a pipe cleaner through it a few times So now it spins freely. So now once again I have to put it all back together again and try to get it to play. But first I have to find another c-clip and that's going to be fun to put that on. So that's going to take some time. Thank goodness I had a donor.
And then I get it all back to working and then there's no sound. What could it be. Why it is the little red wire that goes to the Head that is not connected to where it's supposed to be connected to. So I got in there as my wire strippers and stripped back a little bit and now I'm waiting for my soldering iron to warm up When will I be finished with this? Well I went and got my helping hands and got it soldered yay. Let's try it again
Okay, I just had to see what the speaker looked like. It's clean. I don't even need to clean it It's a 6-in diameter speaker 16 cm, 4 ohms and 4 watts Max
Another interesting big Mono box. Such a radio would be good to have just murmuring away in the background all day on a decent AM or FM station. In the garage or in a funky old store somewhere. Someone needs to buy this! So much dang work went into this restoration!
