Daewoo DSC-30W60N, Руководство по обслуживанию

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18
8. Troubleshooting charts.
No Picture
(NTSC Signal)
To DTV Decoder Module
CVBS is to pin 13 of PW01M
Check Tuner (U101).
CVBS is to pin 34 of IC210. Check IC210.
Check if CVBS is 1Vp-p to pin 88 of ICA1. Check QCA9 , FA3, andQCA11
Check if Y output is 0.9Vp-p to Yout of PV1.
Check if the color burst of C signal is 170~180mV to Cout of PV1.
Check QCA4, FA1, and QCA1
Check QCA8, FA2, and QCA5
OSD is on the screen.
Check video signal of IC210.
Video 1 : CVBS to pins 43 ,Y to pin 45,
and C to pin 47
Video 2 : CVBS to pin 7
Video 3 : CVBS to pin 27
Video 4 : CVBS to pin 1 ,Y to pin 3, and
C to pin 5
NO
AV Signal RF Signal
NO
Check each
input signal.
NO
YES
YES
NO
NO
NO
NO
YES
V1
YES
YES