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Old 01-10-2019, 07:17 PM   #4
R_J
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Join Date: Jun 2012
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Default Re: Bush idlcd26tv22hd 17PW15-8 issue

Check the voltage across C819 (220f/450v) It should be about 400v If its only about 340v, The pfc circuit is not working.
Check Q803 and R829/830.
If you have 400 volts, check the resistance of Q813, Q814 & R971.

Using hot ground as ground (- of C819), check for VF_MAIN voltage on ic828 pin 3, then when power is pressed check for voltage on ic828 pin2. This is the VCC voltage for IC807, pin 15

Last edited by R_J; 01-10-2019 at 07:35 PM..
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