Mitsubishi TV CS-3506 What is proper B+ voltage ? alt. ref: CS-3506R CS3506 CS 3506 CS3506R CS 3506R

Hello, I just fixed this Mitsu CS-3506 in a trade deal with a friend of mine. Crikey after replacing every Nichicon black cap with a " + " stamped into the top of the can and also hours of reworking electrolyte damaged traces I think I'm about ready to make the drive and put the chassi back into the set.

Before I pulled the chassi out, I measured B+ to the HV section to be 149 V None of the Mitsu schematics I have for other sets indicate any B+ this high. Could this be normal for this model, or should I take a closer look at the SMPS regulation before I reinstall the chassi and fire this puppy up?

Thanks, Dave Moore

Sorry for the double post. My news server wasn't posting so I made a Google account for the screen name "DSP" and posted only to find to my extreme dismay that now ( special thanks to Google Groups), my email address has been posted.

Arrrrgh!!!! let the damn spam begin again

Dave Moore

Should be 130VDC. Check C916.

Leonard

Thanks Leonard, I don't have the chassi handy but I'll lay odds that C916 was probably one of the some 20 or more caps I replaced so maybe that problem has already been fixed. I guess I'll try to power up at least the SMPS on the bench and verify this.

"Leonard Caillouet" wrote

: Should be 130VDC. Check C916. : : Leonard :

: "Dave Moore" wrote : : > Hello, : > I just fixed this Mitsu CS-3506 in a trade deal with : > a friend of mine. Crikey after replacing every : > Nichicon black cap with a " + " stamped into the : > top of the can and also hours of reworking electrolyte : > damaged traces I think I'm about ready to make the : > drive and put the chassi back into the set. : >

: > Before I pulled the chassi out, I measured B+ : > to the HV section to be 149 V : > None of the Mitsu schematics I have for other sets : > indicate any B+ this high. : > Could this be normal for this model, : > or should I take a closer look at the SMPS : > regulation before I reinstall the chassi : > and fire this puppy up? : >

: > Thanks, : > Dave : >

: >

: :

You will likely need to replace the regulator if the B+ is too high and the caps are good. There is also a green ceramic in that PS that changes value, IIRC. You might want to check.

Leonard

Thanks for the heads up I'll keep that in mind when I get back to it next week as my plans for this week have been reordered so that I might finish a new guitar amp design in time for another friend before he starts recording his new CD this Saturday

: >

: > "Leonard Caillouet" wrote : >

: > : Should be 130VDC. Check C916. : > : : > : Leonard : > : : >

: > : "Dave Moore" wrote : > : : > : > Hello, : > : > I just fixed this Mitsu CS-3506 in a trade deal with : > : > a friend of mine. Crikey after replacing every : > : > Nichicon black cap with a " + " stamped into the : > : > top of the can and also hours of reworking electrolyte : > : > damaged traces I think I'm about ready to make the : > : > drive and put the chassi back into the set. : > : >

: > : > Before I pulled the chassi out, I measured B+ : > : > to the HV section to be 149 V : > : > None of the Mitsu schematics I have for other sets : > : > indicate any B+ this high. : > : > Could this be normal for this model, : > : > or should I take a closer look at the SMPS : > : > regulation before I reinstall the chassi : > : > and fire this puppy up? : > : >

: > : > Thanks, : > : > Dave : > : >

: > : >

: > : : > : : >

: >

: :