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Micor HVPS Part #
Posted: Mon Apr 17, 2006 1:26 pm
by tkiuntke
On the TPN1131A Hi voltage Power Supply, what part # is the power control board? Is it TLN5701A or TRN8578A? If it's the TLN5701A then what is the TRN8578A for? Thanks in advance.
Toby Kiuntke
KC0FRU
Posted: Mon Apr 17, 2006 2:40 pm
by k2hz
The Power Control Board for TPN1131A is TLN5701A.
I can't find any reference to a module TRN8578A. What is it supposed to be?
Posted: Tue Apr 18, 2006 5:20 am
by tkiuntke
It looks like the TLN5701A without the SCR.
Posted: Tue Apr 18, 2006 7:54 am
by k2hz
tkiuntke wrote:It looks like the TLN5701A without the SCR.
Maybe it is for a later version of the TPN1131. My manual is 68P81022E11-D (part of 68P81022E90-E) with SMR revisions up through 1982 and I don't see any alternative to the TLN5701A. The only revision on that board was a part # change for C1 and C2.
The SCR controlls the 300VDC PA Screen circuit. If that is omitted, I would suspect it is for another version of the power supply to work with a different PA.
Posted: Mon May 22, 2006 1:43 pm
by AEC
The TPN1131A is the 120 volt, 60 Hz. model, and the TPN1135A is the dual voltage(120/240) volt, 50 Hz.
Different line frequencies to deal with.
And from the manual, the diodes are not part of the power control module (TLN5701A), but that module does contain the SCR (Q51)(M9349).
CR1-CR4 feed the H.V metering PA current (Wht-Red) and (Wht-Grn).