Daewoo DWP-28W2ZZF Service Manual download pdf (Page 65)

Appendix Service manual WP-795

- 38 -

If the TV set was on stand-by mode before switching off, the microcontroller switches TV set to

stand-by mode, decreasing power pin voltage (pin 63). this matter will be explained on

paragraph 5-9-2-b.

2-9-1-3 Reset pulse circuit:

2-9-1-4 Reset pulse circuit operations description

- When DC supply voltage from I823 regulator starts rising (from 0V to 1.2V), no current flows through

D591 zener diode. So, Q510 is in off mode.

Also V

be Q511

=Vcc/2 -Vcc = -Vcc/2 > -0.6V. So, Q511 is in off mode.

Then, no voltage reaches I501 pin 60.

- When this voltage reaches 1.2 V, Q510 stays in off mode

but V

be Q511

= -0.6V. So, Q511 is switched on and starts driving DC supply voltage to I501 pin 60.

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Daewoo DWP-28W2ZZF Service Manual Page 65