Samsung RCD-2600 Service Manual page 53

4. NO AUDIO
Check signal of
pin 1, 20 of IC3403
ie)
Check signal at pint, 14
of IC 3403
5. DISPLAY NOT WORKING
Check door leaf switch
ie)
Check soldering of pin26
of IC 7530
Check XF 1702 (4MHz)
°
Check voltage at pin7
(LCD bias) of IC 7530
(6V)
Check voltage of Q 2000
(reset trasistor)
° |
x
Check waveform of Check DSP power supply Replace DSP (IC 5990)
pin76 ~ 80 of IC 5990 and pin short
fe}
Check power supply of IC 0316
and IC pin short
Replace IC
Check collector voltage
of Q 1909 (4.6V)
Replace trasistor
Replace 1C3403
Check power supply of IC 7530
Replace IC
Check soldering of Q 2000, R 3335, C 2221, C 2230
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