Test Mode - Sony ICF-CD523 Service Manual

4-1. LCD TEST MODE
Setting the Test Mode
Turn the power on while pressing u , > and [ALARM ON/
OFF] buttons simultaneously.
Operation of Test Mode
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
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]
Note: 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.
SECTION 4

TEST MODE

Segment (Display)
,
4-2. CD TEST-1 (AUTO) MODE
Setting the Test Mode
Short the solder bridge of BP404 on the MAIN board (connect
IC401tl pin and ground) and turn the power on. (See page 12)
Operation of Test Mode
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 Tracking gain
adjusted value adjusted value
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
[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.
ICF-CD523
Focus bias
adjusted value
Operation
11