Daewoo DPP-42A1LASB Service Manual

Also see for DPP-42A1LASB: User manual

Daewoo DPP-42A1LASB Service Manual Manual pdf 85 page image

English- 17 -3-5. TCP Damage(1) In case of shorting or opening the IC output of TCP, it mayshow one or several vertical lines.O Test Point: Enlarge the after measuring output TP ofGND~TCPO Wave format: As shown output below figure.In case of normal wave output, when STB signal isgenerated, maintain High output. And when STB signalis generated again must be fall Low.But when IC of TCP is poor, STB signal is not generatedOutput falls with Low.(2) In case of being damage IC of TCP or power resistance, thescreen doesn’t be shown or happens discharge partially.O Test Point: Enlarge the after measuring output TP ofGND~TCPO Wave format: Output wave doesn’t come outO Measurance position: Enlarge the after measuring outputTP of TCP (Full White Pattern)3-6. Crystal(CTRL B/D: X1) Damage(1) When Crystal is damage, the screen doesn’t be shown.O Test Point: Measuring 3pin of GND~Crystal(CTRL B/D:X1)O Wave format: Output wave doesn’t come out(2) In case of unusual launch of the Crystal, it may blink thescreen.O Wave format: As shown below figureO Measurance position: Measuring output 3pin ofCrystal(X1: 100MHz) on CTRL B/D (Full White Pattern)