Broken JPN. Type-B PSU: Specs of Zener-Diode

[tmppro]

I'm trying to repair a japanese Model 1 Saturn which has a non-working Type-B power supply (Yamaha 35M07).

It makes a clicking noise in approx 1 second intervals, which most likely means it's shut down by the protection circuit.

The 9V rail has a short to ground and I've tracked it down to the Zener-Diode ZD3. Desoldered it and it's shorted in both directions.

Can somebody point me to a suitable replacement? The marking on the diode is 'A' or two lines followed by A (if they are part of the marking), like 'IIA' or '11A.

[tmppro]

Solved:
The diode is a BZX55A11. It's not manufactured anymore, a currently available replacement is: BZX79C11
After replacing it the power supply is working fine again

[bring]

Well Done and Congratulations!