JVC AV-28-BD-5-Bl 28" TV "vcc circuit" Questions

...your vertical output ic, maybe bad vertical output ic.  If it is shorted, may draw down your vcc for your audio circuit.  Check vertical circuit for open resistors or bad vertical output

...out need to find convergence circuit and look on the plugs for your vcc voltages going to the convergence circuit.  If missing, trace back to power supply and look for an open low value

VCC supply If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electro-medical.blogspot.com/ http://electronicshelponline.blogspot.com

...circuit. If it is not means LA 7840 ic getting imbalanced supply voltage i.e.,negative and positive voltage are not equal. Suppose only one vcc means supply resister getting high ohms and change the ...

VCC 9v is measured on the 56 pin IC TB1253AN but not after a few seconds.On pin 32, the x-ray pin, about 8v appears after the power button is pressed then goes down after a few seconds. The voltage at

...Vcc 9V at TDA8659an ok.All Voltage at the secondary chopper seems working very well,except the output of hor out at pin#39 of TDA8659AN is not oscillating at all.But sometimes the TV will work fine, ...

...circuit. Usually Sony sets uses STR regulated power supply. You can see this STR, and Ic, screwed onto a heatsink. Replace it with a same type and number. Before replacing the STR, check the diodes ...

Vcc is on Pin 6 of the vert. output IC so you can trace that back to it's feed resistor (not sure the location number but you can find it easily by following the circuit trace). Depending on what your

Vcc pin of the vertical output IC. If it is higher than apropriate voltage, replace the filter capacitor in the DC supply line of the IC. This voltage comes from one of flyback transformer windings so

...circuit is not getting supply voltage. Dry solder, weak capacitor could lead to this problem. Check the audio IC no and search in Google. Check the Vcc, Vss, Vdd pins and check the voltages. Trouble ...