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Old 18th June 2005, 04:10 PM   #1
Tomg is offline Tomg  United Kingdom
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Question CD80 service manual?

Does anybody actually have a copy of this I could have at all?

thanks,

Tom
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Old 18th June 2005, 11:51 PM   #2
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I do, but have never had luck trying to scan it.

Specific question?

Jocko
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Old 19th June 2005, 02:01 AM   #3
Tomg is offline Tomg  United Kingdom
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erk, no specific question I just have two of these machines to work on

One does have a problem with the switch on and off of the muting relays though...
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Old 19th June 2005, 03:38 PM   #4
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There is a DC protection scheme that mutes the relays. Or "relais" in their parlance. It also kills the "play" LED on the front panel when the protection is activated.

Jocko
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Old 20th June 2005, 09:26 AM   #5
renes3 is offline renes3  Zimbabwe
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Thanks Jocko,

I was wondering why my play led was only working for a short time, and after a while stops working
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Old 20th June 2005, 01:12 PM   #6
Tomg is offline Tomg  United Kingdom
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Well I have one machine which works perfectly, the muting relays function as they should, turn the player on, couple of seconds later and they click.

On the other machine the relays click as soon as you turn the machine on, you get pops on the output and then when you turn it off, you again get pops and half a second later the relays cut in. It almost seems to be working in the opposite way to how it should be.
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Old 20th June 2005, 02:48 PM   #7
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Quote:
Originally posted by Tomg
Well I have one machine which works perfectly, the muting relays function as they should, turn the player on, couple of seconds later and they click.

On the other machine the relays click as soon as you turn the machine on, you get pops on the output and then when you turn it off, you again get pops and half a second later the relays cut in. It almost seems to be working in the opposite way to how it should be.

DC on the output perhaps ? Duff IC, leaky cap? Check the usual suspects.
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Old 22nd June 2005, 10:55 PM   #8
Tomg is offline Tomg  United Kingdom
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I wish I knew how to or where to look

any pointers as to where I should be looking (part nos etc)?
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Old 23rd June 2005, 01:58 AM   #9
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It uses a servo, and not coupling caps.

Servo: LM308......#s 6390, 6391..........goes to buffer/LPF '5532............# 6393. (One buffer does both channels.)

Connects to I/V stage '5534...........#s 6384, 6385. Pin 2 on both.

Pin 6 of output '5534......... #s 6386, 6387.......should be 0 V DC.

Hope that helps some
Jocko
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