Re: back light too bright sanyo dp46848

The area under the barcode sticker is a white field. No info or test points.

Re: back light too bright sanyo dp46848

Here is a pix of the board.


The gamma correction IC is a pt. # RM5101....

Re: back light too bright sanyo dp46848

I'm curious about this process of reading the Gama voltages. I have a similar set (Sanyo DP42849) that uses a 55.42T06-C03 T-Con. The VG testpoints are not listed 1 - 22, but only about a third of them are listed. VG1, 2, 4, 10, 15, 17, 19, 20, 21, & VG22 are shown. Along with VGHC, VGL, & VGMA_REF. What's the process here? Anybody know?

I've swapped out the T-Con, with no change. The ribbon cables look clean and undamaged. Cleaned connectors w/ DeoxIT D5. I'm coming up short here.

I have this Sherwood R-300 on the bench, with 2 blown fuses near the Line Transformer. Fuses are both 750ma @ 125v, so they are not for the outputs. Does anyone have a schematic for this unit? Or is anyone familiar with it enough to say what source these fuses feed? The output transistors are not shorted.

Re: New Members - please post your introductions here

Howdy all
My story is that I've been a working tech, virtually all my life. Got started in the early 70's while in the U.S.Navy working on communication and navigation equipment for aircraft. Mostly land based, but I did complete one cruise aboard the USS Hancock (CVA19) in 1975.
Since then it's been medical instruments and consumer electronics, mostly TV. I've owned and operated a retail/service store since 1984. I prefer to do component level repairs whenever I can.

DanR

so what's...