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Admiral 14UY3C Sams 351-1
Attempting to restore this two tone green 14" set. Have a blank raster with very faint audio. Picture and sound seem to jump in and out when tweaking volume control. Contrast control seems to do nothing.
130 VDC supply is low (40 VDC) 255 supply OK When 130 removed from tuner, brightness control, and IF board, Pin 1 12CU5 (130 volt source) with C4, & C3B connected is normal. All filters have been replaced , tubes tested and a few caps on IF board. Common chassis with some variations used in the 10" thru 17" sets. If someone could provide a tube layout for this chassis and or the schematic from the sams or admiral service literature it would be appreciated. I have 350-1 but some of my tubes seem to be different on the tuner and IF board. This set also has the UHF tuner. Maybe a quick where to check tip from you experts could lead me to the culprit. Thanks |
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