Hi,
I didn't locate the source of the problem (see below) after testing many parts, but I used a "patch", after the owner gave permission, to restore the proper B+, which I assume is +130V (HV now around 25KV). Note: I do not have SM.
"Patch" to Restore Reg B+ to 130V:
880K (resistors combo) across R14115, 143K.Thanks to Franc Zabkar for the training manual source (see below). It has partial schematics.
I found a few others on the web that had the same problem, one had exactly the same "+154" volts, however no one posted a solution. One person said he had that problem and he said the problem lies on the secondary side of the transformer in the feedback circuit, but he didn't say what part(s) he replaced (if he fixed it?). Of course, this is what I suspected in the beginning, and I checked many parts in the feedback for the regulator, also the regulator reference circuit, and many parts around the regulator on the primary side. I checked +13V and +16V sources, which were about a volt+ high until I installed the "patch".
Next, I would have to replace semi-conductors, although I tested them in circuit, to see if one of them is the problem, but there is a limit to how much time, and the customer is willing to pay me to fix this 20" TV. I already spent too much time on this repair project.
Brad
Response from Franc regarding the source for the training manual: