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Post by corgiluver on Jul 14, 2016 11:38:09 GMT -7
This is actually a mother goose question, but since Teddy works similarly I figured I'd ask anyway. I have mother goose with zero servo function (neck, beak, or eyes). All three feel loose (turn smoothly by hand), but the traditional twisting them loose by hand has gotten me nowhere. What I have been able to do is use an ohmmeter to create a closed circuit directly on the motor contact points causing the motor to spin. I also plugged one servo into a teddy ruxpin and the motor moved perfectly in sync with Teddy's cassette animation. I can guarantee my MG cassette isn't the problem because it animates my other working goose. So my question is, if the servos work in every way but in this goose, is there something wrong with her circuit board?
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Post by BeachBear on Jul 14, 2016 19:58:44 GMT -7
I would check the head connectors for the three animations, and check for loose wires, or any other anomaly that may be present. How did you come to own this goose, does she look any different from other models? Quite an odd fault, I hope you're able to get her working again... Also, from my experience, Mother Goose's eyes should not be able to be moved by hand without considerable resistance/force, and then there's quite a large risk of her eyelids breaking off, how smoothly can you rotate her eyes? Pictures would be appreciated  |
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Post by corgiluver on Jul 15, 2016 10:15:32 GMT -7
Well, I was thinking since the servos work plugged into teddy's circuit board it probably isn't a loose wire, right?
Nothing looks abnormal about her to me. I got her off eBay just for fun.
I should have specified, I have her completely disassembled and the eye servo moves like a working one should. I'd never move her actual eyes cause like you said, too big a risk in breaking them.
I'll post a picture when I get home. Any part in particular you want to see?
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Post by late2theparty on Jul 15, 2016 11:55:59 GMT -7
Have you checked the animation wires from the tape head into the board?
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Post by corgiluver on Jul 15, 2016 18:43:09 GMT -7
I hadn't! I think this might be the problem though, because wiggling them a little at a certain spot got me some servo movement! Thanks for the advice!
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Post by BeachBear on Jul 16, 2016 6:07:52 GMT -7
I hope that's it, it sounds promising...
If you would mind taking photos of her mech when it's disassembled, that would be great, I would like to see how the head turner model differs from the later model.
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Post by late2theparty on Jul 16, 2016 15:42:18 GMT -7
Since you are getting servo movement by jiggling that Molex plug, the first option would seem to be to remove the clips and wires from the plug to check that the wires have good connection into the clips, and that the clips themselves are open enough to get a good connection to the rods that connect into the board. That plug has two double wires going in. Each set consists of one that is insulated and one that is bare. Best to remove them as two separate sets, but be sure to photo or mark where they go back into the plug. If that does not work, I suspect that one or more of the 4 rods that go into the board is not getting good contact. This can happen if the Molex plugs have not been carefully pulled, pulled too quickly or with too much pressure. If the solder joint was not too firm to begin with, its almost inevitable. Fixing that problem will require you to resolder the points where the rods and printed circuits in the board come together. I've done this more than once...usually with success. But on occasion it has caused some weird result. If you don't think you are steady of hand to do this job, better to find someone who is.
You might be able to find out if the is a problem by a little light downward pressure on the rods into the board. If one or two slide downward, then you know that there is a problem with the contact of into the circuit board.
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Post by late2theparty on Jul 16, 2016 15:57:23 GMT -7
P.S. I recently picked up a Mother Goose myself. Although it is the later type where the neck does not swivel, came with Hector, the cord, 3 Mother Goose and 2 Hector books and tapes, and all in excellent shape. These guys were well cared for and the the price was remarkable. Mother Goose cracks me up, though. She tells the stories in that sort of grandmotherly Mother Goose voice that you'd expect...punctuated by an occasional "HONK HONK!"
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Post by corgiluver on Jul 16, 2016 18:38:32 GMT -7
Thanks, I'll be working more on her when I have the time. Sounds like you found quite a score! I have another mother goose besides this one, my own I've already restored. I recently showed her to my 96 yr old grandmother, and I so regret not getting her reaction on video. I guess she wasn't expecting the animation, because when I lifted the wing to reveal the cassette deck she nearly fell out of her chair. She couldn't believe a tape player was hiding in this toy. Then she just sat in awe listening to her and watching her blink and sing. I almost teared up watching her, she was so enthralled by this mother goose I worked so hard on.
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Post by corgiluver on Jul 30, 2016 15:40:56 GMT -7
I hope that's it, it sounds promising... If you would mind taking photos of her mech when it's disassembled, that would be great, I would like to see how the head turner model differs from the later model. My apologies for not posting any pics yet. She's still just as empty shell at this point and I figured you'd want pics with the motors in her. I haven't forgotten! |
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