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EJohnson EJohnson is offline
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Posts: 7
Default Troubleshoot SMPS in Zenith TV...again!!!

Hello Everyone;

Once again I am still having trouble with a Zenith Model: A32B41W (9-2003) TV set...a wire-wound sand block? power resistor (5W, 0.68ohm RX3401) keeps burning up immediatly when the unit is plugged in. I got the schematic and looked over the power supply section and the resistor that connects to the bridge rectifier (DX3401) and supplies the ground (-) is the trouble maker. This is the set that was killed by too much input voltage (240 not 120). I replaced some components including the 470uF (CX3405) main filter cap and couple other resistors. I don't understand what keeps burning this resistor...any ideas???

Would the HOT (1167-01) be responsible for shorting the power resistor?

Also, If you want to have the full (1MB) .PDF schematic for Zenith GB series, contact me through email and i'll send it to you.
Ejohnson1486(at)yahoo(dot)com
Thank You for any help