Yamaha MDX-E100 Service Manual page 24

MDX-E100
Recording/reproduction function
Load a low reflection disc and after confirming the audio output in the normal reproduction mode, execute recording/reproduction.
Does the recording function fail from the starting address?
YES
Is an RF waveform available at No.1 pin of PT1201 or IC1201
during reproduction after recording?
NO
Does the level of No.3, 26 and 39 pins of IC1401 and No.9 and 19 pins of
CN1101 change between during recording and during reproduction?
YES
Is an RF pattern provided at No.50 pin of IC1201?
YES
Check IC1300, Q1300 - 1303 and CN1300.
Is an output waveform available at No. 1 and 7 pins of IC102 and No. 1
and 7 pins of IC103 while recording the LINE input in the normal mode?
YES
Is an input waveform applied to No.3 and 5 pins of IC1701?
YES
Check between CN1701 and No.70 - 73 pins of IC1201.
Focus servo function does not work.
Is a correct waveform provided at No.27 and 28 pins of IC1101
during the focus gain rough adjustment step in the test mode?
YES
Has No.81 pin of IC1201 fall from "H" to "L"? Is a pulse
waveform provided at No.82 pin of IC1201?
YES
Does the pulse waveform duty of No.18 and 19 pins of IC1201 change?
YES
Does the waveform change at No.15, 16, 26, 27 pins of IC1601?
YES
Does the waveform change at No.2 and 4 pins of CN1101?
YES
OK
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NO
Check that the disc is not in the recording inhibited status.
YES
NO
Check around IC1401 and CN1101.
NO
Check IC1201 for proper soldering.
NO
Check around IC102 and IC103 and also check the
REC LEVEL volume.
NO
Check around IC1701 and CN1501.
NO
Check the waveform and soldering of No.9 and 10 pins of
IC1101.
NO
Check the waveform and soldering of No.8 and 9 pins of
IC1201.
NO
Check soldering and parts of IC1201
NO
Check soldering and parts of IC1601.
NO
Check CN1101 and the pickup.