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 |
Should be 130VDC. Check C916.
Leonard "Dave Moore" wrote in message .. . 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 |
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 "Dave Moore" wrote in message .. . 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 : : : : |
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 in message news:LDOAe.35717$up5.3516@lakeread02... : 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 : : "Dave Moore" wrote in message : .. . : 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 : : : : : : : : : : : : |
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