Hi people
I've bought an AIWA TRP-990.
The boombox itself looks like new. It's mint, but, guess ..... the deck isn't working and so is he FM
Ok, let start whit the MOST important, the cassette deck.
And when I opened this beauty .... I felt both surprised and frightened.
Surprised by it complexity. Really the most complex boombox I've opened.
Solid, well made and definitely service-unfriendly.
No conectors, all the wires are soldered. I managed to take the main board out (without unsoldering wires). Then I saw the mecha. WHAT A PAIN !!!!!!!!!!!!! The mecha is a soft-touch built around a common mechnical one (very similar to my 955) but it has a black -box in it's botton, that pushes the mecha buttons. This black-box is a servo mechanism, very complex, with one shaft per key (never seen that) driven by one motor.
All the servo system was jamed. Many buttons was pressed at the same time (I noticed that when I purchased it) , mising springs ... The systems itself is quite complex to guess what is going on.
I spent all the afternoon figuring out how this servosystem works. Eventually, I managed to get it working (some functions) powering the motor with a supply and seeing how the servosystem moves to press the buttons of the mechanical deck used in the 990.
I need a little help. Only if you have the photos from a previous work of the exploded diagram of the mecha.
Here the photo of the servosystem ....
The question is about the function button marked with the red arrow ... It supposed to has and spring, because, If I press it, it doesn't return itsefl, like the others ... But I can't see where the supposed spring goes.
Don't get confused, I added two springs to the mecha no get the other functions working properly.
Here is a photo of the mecha (the cassette drive itsefl), which is mechanical !!!!
Pretty box, good sound, superb design .. but I HATE ITS DECK !!!!!!!!!
I've bought an AIWA TRP-990.
The boombox itself looks like new. It's mint, but, guess ..... the deck isn't working and so is he FM
Ok, let start whit the MOST important, the cassette deck.
And when I opened this beauty .... I felt both surprised and frightened.
Surprised by it complexity. Really the most complex boombox I've opened.
Solid, well made and definitely service-unfriendly.
No conectors, all the wires are soldered. I managed to take the main board out (without unsoldering wires). Then I saw the mecha. WHAT A PAIN !!!!!!!!!!!!! The mecha is a soft-touch built around a common mechnical one (very similar to my 955) but it has a black -box in it's botton, that pushes the mecha buttons. This black-box is a servo mechanism, very complex, with one shaft per key (never seen that) driven by one motor.
All the servo system was jamed. Many buttons was pressed at the same time (I noticed that when I purchased it) , mising springs ... The systems itself is quite complex to guess what is going on.
I spent all the afternoon figuring out how this servosystem works. Eventually, I managed to get it working (some functions) powering the motor with a supply and seeing how the servosystem moves to press the buttons of the mechanical deck used in the 990.
I need a little help. Only if you have the photos from a previous work of the exploded diagram of the mecha.
Here the photo of the servosystem ....
The question is about the function button marked with the red arrow ... It supposed to has and spring, because, If I press it, it doesn't return itsefl, like the others ... But I can't see where the supposed spring goes.
Don't get confused, I added two springs to the mecha no get the other functions working properly.
Here is a photo of the mecha (the cassette drive itsefl), which is mechanical !!!!
Pretty box, good sound, superb design .. but I HATE ITS DECK !!!!!!!!!