Service manual

MD-R2

– 48 –

Yes

• Normal playback

Is initialization performed normally when high reflection disc is

played back?

Does disc rotate normally?

No No

Check IC1201

Is lead-in switch turned on in the TEST mode when the pickup is on

the innermost periphery (Is the pin 6 of OC1401 on L level?)

Check SW1953, mechanism switch PWB soldering joint, and

CNP1601 pin 1 periphery.

Is an attempt to read repeatedly the TOC section of low reflection

disc made?

Since the TOC section has not been recorded on the new disc,

replace it with recorded low reflection disc.

Yes

Check the position as stated in item "lead-in switch position

measurement mode" (high reflection disc adjustment).

Yes

When it has been confirmed that EEPROM value is normal in the TEST mode

Does the playback time display advance?

• Audio playback circuit

Yes

Is audio output waveform observed on the pins 22 and 24 of

CNS1901?

Check connection between IC1701 and CNS1901.

Check the main PWB.

Yes

When sound is not output although the playback time display advances during playback in the normal mode.

Is audio output waveform observed on the pins 24 to 26 of

IC1701?

Check the pins 70, 71, 72 and 74 of IC1201, and the pins

12, 16, 17, and 19 of IC1701.