JVC R-X500 receiver tip and question alt. ref: R-X500B RX500 RX500B R 500 R 500B

Tip;

Look for damage wherever glue was used. This set had the wires in a couple of ribbon cables eaten away where they were glued to the PCB's

Question;

Also the glue damaged a zener diode and ate away the identification markings on it. To make matters worse, the bugger was shorted so I couldn't measure the zener voltage. From what I could see, there was a "1" and also the bottom part of either a 6. 8, 3 or 0, so it was probably a 10, 13, 16, or 18V zener

The set is working with a 16V zener in there now, but I'd like to stick to the original value if anyone knows or can look it up for me.

Any help will be truly appreciated. Thanks

--Dave--