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TEAC 1/2" Open-Reel Schematic Needed

I have a Teac Model 80-8 1/2" open reel machine I have to repair for a customer. This is the first 1/2", 8-track machine I've worked on and it's clear I'm going to need a schematic. The main problem is that some channels are sounding through to others; for example, with a signal connected to channel 1 only, it sounds over to channel 2 and faintly to channel 3. This happens even when monitoring the input without a tape loaded, ruling out a head alignment issue. Any advice, or especially a schematic, would be appreciated.

Reply to
Chris F.
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"Chris F."

** Have you tried shorting the unused inputs while testing ??

This is how the recorder would be used in practice.

.... Phil

Reply to
Phil Allison

You should be able to get the service manual from:

TEAC America inc

7733 Telegraph Road Montebello, CA 90640

Parts Department: voice: (323) 727-4840 fax: (323) 727-7632 e-mail: snipped-for-privacy@teac.com

I do know that they had copies of the manuals for many of their old to ancient(early 70's) tape machines. I worked there for a year and a half and they were still repairing

1/4, 1/2, 1 , and larger machines at that time (3 1/2 years ago)
Reply to
forte agent

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Reply to
Pimpom

If that doesn't eliminate the crosstalk, I'd suspect a common power supply filter in the low-level stages. Perhaps a dried-up cap.

Reply to
Pimpom

There's a Teac-specific web site at

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Send them an email and see if they can help with your problem. They might even have a manual on the bottom shelf..

--
David
dgminala at mediacombb dot net
Reply to
Dave M

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