Teac P-700 transport need help

Wilmore · 27th July 2005, 08:33 PM

My P-700 transport put aside for a while,
now it doesn't work I open the top cover and found it's clamper didn't
come up but the tray kept open after I close it.

Anybody knows the transport well please give me a hand.

What is this chip "uPD75208W"? I can't find any detail information about it.

Thanks for your attention!

Wilmore

Netlist · 27th July 2005, 08:48 PM

It could be the belt is worm out.
Here is the datasheet for the 75208.

/Hugo

Wilmore · 28th July 2005, 06:23 AM

Hi Hugo,

Thanks for your help, but I check the belt it's still in good condition.

Do you know how the clamper work? There is a leaf switch behind,

when the tray closed, the clamper should go up to the turn table,

clamp the disk and turn the disk(that's the VRDS way).

The leaf switch now always been pushed to the left side and the

clamper didn't go up to clamp the disk,this is what happened in

my P-700.

I don't know how it works when the transport in working condition,

( the switch leads are connected to uPD75208 pin 26 and 27) ,

I mean what triggers the clamper motor to turn the clamper

go up or go down?

Please help!

Wilmore

Netlist · 28th July 2005, 06:32 AM

Wilmore,
It sounded like a belt to me. Other than that I don't know the transport but from experience I usually suspect mechanics rather than electronics in the first place.
Let’s just wait for Teac specialists to jump in.

/Hugo

27th July 2005, 08:33 PM	#1
Wilmore diyAudio Member Join Date: Feb 2004 Location: Taiwan	Teac P-700 transport need help My P-700 transport put aside for a while, now it doesn't work I open the top cover and found it's clamper didn't come up but the tray kept open after I close it. Anybody knows the transport well please give me a hand. What is this chip "uPD75208W"? I can't find any detail information about it. Thanks for your attention! Wilmore

28th July 2005, 06:23 AM	#3
Wilmore diyAudio Member Join Date: Feb 2004 Location: Taiwan	Re:Teac P-700 transport need help Hi Hugo, Thanks for your help, but I check the belt it's still in good condition. Do you know how the clamper work? There is a leaf switch behind, when the tray closed, the clamper should go up to the turn table, clamp the disk and turn the disk(that's the VRDS way). The leaf switch now always been pushed to the left side and the clamper didn't go up to clamp the disk,this is what happened in my P-700. I don't know how it works when the transport in working condition, ( the switch leads are connected to uPD75208 pin 26 and 27) , I mean what triggers the clamper motor to turn the clamper go up or go down? Please help! Wilmore

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27th July 2005, 08:48 PM	#2
Netlist diyAudio Moderator Join Date: Jan 2003	It could be the belt is worm out. Here is the datasheet for the 75208. /Hugo

28th July 2005, 06:32 AM	#4
Netlist diyAudio Moderator Join Date: Jan 2003	Wilmore, It sounded like a belt to me. Other than that I don't know the transport but from experience I usually suspect mechanics rather than electronics in the first place. Let’s just wait for Teac specialists to jump in. /Hugo

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