DHC-MD313, HCD-MD313 (serv.man2) - Sony Audio Service Manual (repair manual). Page 4

– 4 –

1. Insert the tweezers to a hole on bottom of the chassis as shown

a figure, then tern fully it toward direction 2.

2. Pull out the disc table.

disc table

cam

1

 tweezers

2

3

1. Press two buttons PLAY MODE and

p (MD) simultaneously

for standby status.

2. Fluorescent indicator tube and LEDs are all turned on.

Press FUNCTION button, the fluorescent indicator tube dis-
plays pattern change to cycle.
Turning the VOLUME knob, and the each LED turned on to
order.

3. Press

p (CD) button, and the Key check mode.

4. The fluorescent indicator tube displays “KEY=0  JOG=0”.

Each time a button is pressed, “KEY”=value increases.
Howerer, once a button is pressed, it is no longer taken into
account.
“JOG=” value increases like 1, 2, 3... if rotating VOLUME
knob in clock width, or it decreases like 0, 9, 8... if rotating in
cunter clock width.

5. To exit from this mode, press order all buttons (15 buttons), the

displays “KEY=OK”, and press any button, or disconnect the
power cord.

1. Connect an oscilloscope to IC601 pin (¡ and ground of the

MAIN board.

2. Press two buttons PLAY MODE and

§ (MD)

Simultaneously, and the fluorescent indicator tube displays
“32.768 kHz (91)”.

3. To check the signal on oscilloscope becomes 32 kHz square

wave.

4. Press POWER button to exit.

1. Press POWER button and system power on.
2. Press two buttons PLAY MODE and

p (CD)

simultaneously, the fluorescent indicator tube displays “TA
Test”.

3. Rotation VOLUME knob in clock width a little, the fluores-

cent indicator tube displays “Volume MAX”.
Rotation VOLUME knob in cunter clock widh a little, the fluo-
rescent indicator tube displays “Volume MIN”.

4. Press CD-MD SYNC button, the fluorescent indicator tube

displays “BASS/TRE MAX”. Press REPEAT button, the fluo-
rescent indicator tube displays “BASS/TRE MIN”. Press

p (MD) button, the fluorescent indicator tube displays “ALL

FLAT”. Press

p (CD) button, the fluorescent indicator tube

displays “SURROUND = ON”.

5. Press POWER button to exit, and system power off.