Daewoo DWP-28W2ZZF Service Manual download pdf (Page 67)

Appendix Service manual WP-795

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On normal run mode, I501 microcontroller pin 63 (power) is set to high

•

So, I810 controlled rectifier is not conducting

- Q809 is conducting. So, Q808 is not conducting and Q807 is conducting

- So, Q807 collector is connected to the ground and I810 controlled rectifier gate pin is set

to low (no conducting)

•

So, current from 11V DC voltage (from T801 SMPS transformer pin 13) does not flow through Q811

and Q810 transistors but flows through I806 IC error amplifier

- Q809 is conducting. So, Q810 is not conducting and no current flows from Q810 collector

to the ground

Therefore, the power circuit diagram is the following one:

2-9-2-1-2 power supply circuit diagram during TV set normal run

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Daewoo DWP-28W2ZZF Service Manual Page 67