Question about Dell P1130 21" CRT Monitor

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Too Bright P1130

If the screen voltage (G2) is higher than 400V, which resistor on the CRT board should I change? Also, since I don't have a schematic, where would I measure the screen voltage? There are three 470 Ohm resistors in the same approximate location as the ones on the P1110 board, although the boards are quite different. I could experiment by cutting the ohms of one of these in half. (On the P1110 the value of one of the 10M resistors was cut to 5.6).

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Dell P1130 Service Manual r + g + b resistors measure on them and chassis -ground by have a black picture for getting the highest voltages if its looks like out of range look the manual and the resistors on there values that the ones and values you write about can be made of the only few carbon composite resistors witch can have get some drift over time over the tolerance. this kind of dark brown resistors are very sensitive for moisture and more, best is to soldering one leg of the resistor out and measure for compare on every resistor its resist or disconnect the crt print from the tube and if the resistors are good then reduce on the potential meter on the line transformer some reduce brightness below if its so bright that its against the backlashes. control focusing also after that . i have only suggest by this chassis its a 25 years ago i was very busy with c r t t v and video and more a little study on the manual can give you other results for some deformed capacitors also why its come out of range begin with the power supply and don,t forget to disconnect before measuring the power supply the horizontal line load to the line transistor (fly back because of your multi meter and have a 100 w lamp in serial in mains to control for your power supply on .

Posted on Jul 02, 2017


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SOURCE: Too Bright

It could.Check the screen voltage G2,If its high more then 400v this fix could work.

Posted on Mar 10, 2008

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SOURCE: I am replacing the 10M resistor with a lower value

If you cannot find a 10M ohm resistor you can connect lower value resistors in series so it totals to 10M (ie two 5M resistor in series equals 10M). The only thing you need to be careful is to make sure the wattage is the same or higher than the original resistor.

Posted on Jan 06, 2010

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