DM-3090(K) COVER 97.11.29 0:19 AM y[W 30
DM-3090
TR OUBLE SHOO TING
Y Norm al playback
W hen it has been confirm ed that EEPRO M value is norm al in the TEST m ode
Is initialization perform ed norm ally when high reflection disc isDoes the playback tim e display advance?
Yesplayed back?
NoNo
Check IC1201
Does disc rotate norm ally?Is lead-in switch turned on in the TEST m ode when the pickup is on
the innerm ost periphery (Is the pin 6 of OC1401 on L level?)No
No
Check SW 1953, m echanism switch PW B soldering joint, andYes
CNP1601 pin 1 periphery.
Is an attem pt to read repeatedly the TOC section of low reflection
Since the TOC section has not been recorded on the new disc,
disc m ade?No
replace it with recorded low reflection disc.
Yes
Check the assem bly position of"lead-in switch (sw1953)
Y Audio playback circuit(Except DM -3090)
W hen sound is not output although the playback tim e display advances during playback in the norm al m ode.
Is audio output waveform observed on the pins 24 to 26 ofCheck the pins 70, 71, 72 and 74 of IC1201, and the pins
NoIC1701?12, 16, 17, and 19 of IC1701.
Yes
Is audio output waveform observed on the pins 22 and 24 ofCheck connection between IC1701 and CNS1902.
CNS1902?No
Yes
Check the m ain PW B.
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