Service manual

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MD-MT180

Yes

Check whether there is defective solder joint of audio signal line

between IC703 and J703A

Yes

Is audio waveform output from J703A pins 2 and 3.

Check the pins 4 and 21 of IC703.

Yes

Is audio waveform output from IC703 pins 8 and 17.

• Audio playback circuit

Is audio waveform output from IC501 pins 15 and 16?

Check headphones jack, and periphery of headphone.

Although the playback time display is acting., no sound is given during playback in the normal mode.

• The spindle motor fails to run. Does the head move

Does the waveform appear on the IC201 pins 24 and 25 after

TEST mode AUTO2 completion and in this state?

Check the IC201 periphery.

Yes

Does waveform appear on the IC601 pin 36?

Does waveform appear on IC601 pins 56, 57 and 58?

Replace the spindle motor.

Yes

L605, IC201, IC601, CN601 and flex, etc. soldering check

Replace. IC601

Yes

Check IC201 pins 70 to 72, pin 74 and IC501 pins 9, 10, 11, 12.