Display Not Working - Samsung RCD-1230 Service Manual

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4) NO AUDIO
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Xx
Check waveform at ae Check DSP power supply Replace DSP (IC 5990)
pin76 ~ 80 of iC 5990 and pin short
pin 1,20 of IC 0316
IC pin short
Check signal at pin2,19 X Check voltage at pin 4
of IC 9270 of IC 9270
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Replace IC 9270
5) DISPLAY NOT WORKING
Check door leaf switch
Check soldering on pin 26
of !C 7530
Check XF 1702 (4MHz) Check power supply of IC 7530
Replace IC
Check voltage at pin 7
(LCD bias) IC 7530
_ (VY)
Check soldering of Q2000, R3334, C2221, C2230
Check voltage at Q 2000
(reset transistor)
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