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Zener diode No I looked at the zener under magnifiying glass no marking at all. Yes please give me the places to get the schmatics. And I still cant find the chassis number. I do appreciate your help

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Check HERE.
This is the only site that seems to have the service manual.

Posted on Feb 24, 2008

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Zener diodes are sold by wattage and reference voltage by numerous component suppliers and constructor stores and in theory the voltage is marked on them, though difficult to see and easily defaced.

Finding an equivalent for what appears to be a manufacturer's part number presents a rather difficult challenge. The official service sheet will probably provide the required voltage. Without that information you will either have to purchase the component from the manufacturer under the part number or experiment until the required value is discovered.

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