From: Camiel Vanderhoeven <iamcamiel at
gmail.com>
Date: Sun, 29 Jul 2012 17:25:15 +0200
Subject: Re: H7202KA power supply
Replacing the output caps on the 7213 power supply fixed the VBB
output. However, the + and - 15 V outputs are now completely dead. I'm
fairly certain those voltages were ok when I started. These are from
the 7211 module.
Not having any schematics, I traced a few wires. Looks like there's
circa +160V and -160V and +14V and -14V coming from the main regulator
(H7200). The 7211, like the 7213, uses a 3527A, which is driven by a
32.5 KHz clock signal from the main regulator. No picofuses anywhere
as far as I can tell.
Camiel.
The VAX 730 uses almost the same power supply.
Docs for all of the power supplies that you have are here:
http://bitsavers.org/pdf/dec/vax/730/MP01270_11730_Engineering_Drawings_Apr…
--
Michael Thompson