Onida power supply ic hd321 circrt - Samsung DVD-V3500 DVD Player/VCR

Where the diodeRH3G located please tell.is it for vertical IC supply? Plese reply

Have you checked the supply voltage and other pin voltages to this IC? Check it. If all are found OK, and still you do not get sound, main IC is likely to be faulty. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Type in this key phrase " my service table today " in the search box at the top right of the display window, to get gathered some pages which has the details of practical experiences to the author of that site.

There is a power ON signal failure from the main system control IC. Check the standby supply voltage for any short or absence. [5VDC]

Horizontal line on screen denotes the absensce of vertical sweep itself. Check the vertical output section circuit to LA7840. Check for any loose solder terminals. It will be best to measure the input voltage to that IC from the LOT secondary supply. Try by replace the IC. If these do not help you, measure the frequency from the main IC. It should be at 50Hz. If this frequency is not present, the main IC is faulty. If you wish to get some more details about the circuit, check this link. http://electronicshelponline.blogspot.com/ Pull up older posts there, either by its left side bar, or see it in Timslide option. Schematic diagrams, that show vertical IC LA7840 is given. You can compare it.

I want onida model co29slp400b power supply diagrom

red color not display in onida 21 black tv

the speakers or audio ic may be gone.....in rare cases the memory ic must be changed.. or supply to a audio
ic ,it will be 15 v from the power supply of tv may be missing....

onida ultra slim display is not working but audio is working good. solve this problem, how can i repair it.

my onida ky thunder giving fault led blinking after plugin and after 5 second goes to stopped mode