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Old 02-17-2021, 07:16 PM
joe111671 joe111671 is offline
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Join Date: Nov 2007
Posts: 108
Replaced power supply caps

So I replaced the caps in the power supply. C1A, C2A, C2B, and C2C, as shown in the attached shot of the schematic. That didn't change anything.

What I found is that the 375V on C1A is 389V, 365V source on C2A is 381V, the 235V source on C2B is 256V, and the 95V source on C2C is 178V. That's telling me something on the 95V source is not right. I don't know what to look at next. According to the SAMS, there are two arrow connections from the 95V source. I will post those sections of the schematic if someone thinks that is where I need to look.

Zeno mentioned this when I brought it up on a thread regarding a different set:

Quote:
Originally Posted by zeno View Post
On that set look at the main choke in the power supply. See if it has a
non polarized electrolytic in series with a resistor. This is in parallel
with the choke. Per Zenith factory its not needed & you can just
snip the cap out.
Is that main choke L53?
Attached Images
File Type: jpg Power supply.JPG (33.1 KB, 41 views)
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