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MD-MT866H/MD-MT866W
• Recording/playback operation
Insert a low reflection disc, and ascertain audio output by normal playback, and then set TEST REC mode.
Change MSL from 00H to 80H by the control setting of EEPROM. After completing the operation, return in to 00H.
Does the head move down, failing to start record even
when the continuous record mode is set after address?
Does the RF waveform appear at TP201 when recording/
Playback is performed.
Does level of pins 86 of IC401 and pin 86 of change
depending on record and playback?
Is RF pattern output from IC201 pin 50?
Check whether there is any damage in IC101, periphery of
laser diode.
Check for defects of IC351 in head drive flexible PWB,
head, flexible PWB.
Check whether input waveform is observed on the pins 5
and 6 of IC701.
Is audio waveform observed on the pins 10 and 12 of
IC703?
Is the output wavefrom output to the pin 8 of IC501?
Check the periphery of IC501 and the waveform of the pins
70-73 of IC201.
No
No
Yes
Yes
Yes
Yes
Yes
Check voltage of pins 57 and 58 of IC201, pins 2, 3, 6, and 7 of
Yes
IC651, pins 4 and 5 of CN601. Check whether disc is record-
inhibited.
Yes
Check periphery of IC401 and IC101.
No
Check for soldering failure of IC201 .
No
Check whether the audio signal line between IC701 and J701 is
No
defective.
Check whether the voltage of pins 13-15 of IC701 varies with the
recording VOLUME UP/DOWN key operation. Check whether
No
the soldering of IC701 is poor.
Check whether the pin 7 of IC501 and the pin 81 of IC201 are in
No
H state.
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