DAEWOO ELECTRONICS DTQ-29G1TS, Service Manual

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36
7-4. NO PICTURE (NO COLOR)
Step Check Point
C ondition
Rem ark
Yes N o
1
IF V cc= 7.6V dc ? N ext S tep G o to N O P O W E R 2
2 I501 V cc = 7.6V dc? N ext S tep G o to N O P O W E R 2
3 P LL Tuning is operate ? N ext S tep R eplace L502
4 F requency is 3.579545? N ext S tep R eplace X 501
5
R esonator is oscillate ? N ext S tep R eplace X 502
6 W aveform is fig.11 (2V p-p) ? N ext S tep R eplace Z 502
7 W aveform is fig.11(1V p-p) ? N ext S tep R eplace I501(W hen Q C 501 is O .K )
8 W aveform is fig.11(1V p-p) ? N ext S tep R eplace I502
9
W aveform is fig.13(1Vp-p) ? N ext S tep R eplace C O M B 1,or IP 01(check IP 01)
10 W aveform is fig.12(1Vp-p) ? N ext S tep G o to CO M B 1,or IP 01(check IP 01)
11 C heck A BL current of FB T
(25= 1100,29=1400) N ext S tep C heck/replace C C 517,C 545,R C 534
R C 535,R C 536,R C 537
12 C heck S D A ,S C L N ext S tep G o to N O P O W E R (LE D O .K)
13 C heck w aveform of each term inal(fig14,15,16) C R T B /D Check R eplace I501