ICF-CD523 - Sony Audio Service Manual (repair manual). Page 11

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5. The optical pick-up will move inward if the  . button is

pressed, or outward if the  > button is pressed.

6. Press the [BAND] button, and the spindle/tracking servo will

turn on, and if the data are read in, the mute turns off.

7. With the spindle/tracking servo turned on, pressing respective

buttons causes the operation to be performed as follows.

Name of Buttons

Operation

[1]

1 track jump setting

[2]

10 track jump setting

[3]

100 track jump setting

[4]

Tracking gain up

[5]

Returns to auto adjustment mode

[BAND]

Rough servo function turns on

8. After setting, press the  . or  > button to start the track

jump.

9. When the CD test-1 mode becomes active, press the Z button

and the disc table will open.

10. With the rough servo or spindle/tracking servo turned on, press

the x button and the CD will stop, and then press the u
button and the operation will repeat, starting from focus search.

11. With the rough servo or spindle/tracking servo turned on, press

the u button and the optical pick-up will jump to the second
music and the set will release from the CD test-1 mode.

Turn  the power on while pressing u , > and  [ALARM ON/
OFF] buttons simultaneously.

1. When LCD test mode becomes active, the microcomputer

version number is displayed on the LCD.

2. Press the Z button, and all segments of LCD will turn on.

LCD display

3. Press each button, and the corresponding segment will turn

off. Relation between buttons and corresponding segments is
as follows.

Name of Buttons

Segment (Display)

Z

TRACK

u

CD N

[BAND]

RADIO, FM1, FM2,.(POINT)

x

.

>

[CD PLAY MODE]

REP 1, ALL, SHUFFLE

[CLOCK]

AM, PM, :(COLON)

[D.S.T.]

[1]

[2]

[3]

[4]

[5]

[ALARM]

                   ,

[ALARM ON/OFF]

The buttons may be pressed in random order.

4. Finally, press the [ALARM ON/OFF] button to release from the

LCD test mode. However, the LCD test mode does not release
if even one button has not been pressed yet whatever you
pressed the [ALARM ON/OFF] button.

Short the solder bridge of BP404 on the MAIN board (connect
IC401tl pin and ground) and turn the power on. (See page 12)

1. When the CD test-1 mode becomes active, the disc table opens.
2. Insert the CD test disc PATD-012. (Parts No. 4-225-203-01)
3. Press the u button, and the focus search will repeat until

the focus is OK.

4. When the focus is OK, auto adjustment is executed and at the

completion, the rough servo function turns on and the adjusted
value is displayed on the LCD.

LCD display

F-E balance

adjusted value

Tracking gain

adjusted value

Focus bias

adjusted value