Test Mode - Sony ICF-CD823L Service Manual

3-1 LCD Test Mode
• The LCD test mode is initiated by turning off the main power once then back on or by resetting the machine while TP415 (LCD TEST, pin-
60 terminal) is connected to GND.
• The LCD test mode operations are listed in the following table.
• When the machine enters the LCD test mode, all LCDs turn on.
• Pressing any key turns off the corresponding segment of the LCD.
Correspondence between the keys and segments of LCD are as follows.
KEY
1 1a, 1b, 1c, 1d, 1e, 1g
2 2a, 2b, 2c, 2d, 2e, 2f, 2g,
3 3a, 3b, 3c, 3d, 3e, 3f, 3g,
4 4a, 4b, 4c, 4d, 4e, 4f, 4g,
5 5a, 5b, 5c, 5d, 5e, 5f, 5g,
BAND FM, MW, LW
SNOOZE SLEEP
D.S.T s
CLOCK + 6a, 6b, 6c, 6d, 6e, 6f, 6g,
:, .
CLOCK
• Pressing the [ALARM TIME CHECK] button at end of the LCD test mode shows the version number of the software on the LCD.
• The alarm-dial position detection can be checked and displayed if the alarm-dial is operated while the version number is being displayed
on LCD.
• State of the [ALARM-B: RADIO/BUZZER] slide switch position can be detected and displayed on the alarm picture.
3-2 CD Test Mode
3-2-1 CD TEST-1 (AUTO)
• The CD TEST-1 (AUTO) mode is initiated by turning off the main power once then back on or by resetting the machine while TP414 (CD
TEST, pin-59 terminal) is connected to GND.
• When the machine enters CD TEST-1 (AUTO) mode, it repeats the focus search until the focus becomes OK.
• After the focus becomes OK and the focus is automatically adjusted, rough servo is locked in and the adjustment value is displayed.
AM
• The sled can be moved to the innermost track by pressing the minus (-) button. The sled can be moved to the outermost track by pressing
the plus (+) button.
• When the BAND button is pressed, the machine enters the CLVA (servo ON) and the mute is turned OFF if data is read successfully.
When the following button is pressed, the corresponding operations are performed.
a) 1 Setting the 1 track jump
b) 2 Setting the 10 track jump
c) 3 Setting the 100 track jump
Afterwards the desired track jump can be set by pressing the plus (+) or minus (-) button.
d) 4 TRACKING GAIN-UP
e) BAND's rough servo
• P5 Restarts CD TEST-1 (AUTO) mode from the focus automatic adjustment
• When the CD button is pressed then, the track jumps to the second session and the machine exits the CD TEST-1 (AUTO) mode.
• When the OFF button is pressed, the CD playback is stopped. If the CD button is pressed again, the machine repeats operations from the
focus search.
3-2-2 CD TEST-2 (MANUAL)
• The CD TEST-2 (MANUAL) mode is initiated by turning off the main power once then back on or by resetting the machine while TP413
(A MUT, pin-58 terminal) is connected to GND.
• When the machine enters CD TEST-2 (MANUAL) mode, it repeats the focus search until the focus becomes OK.
• After the focus becomes OK, the machine enters the rough servo.
• The sled can be moved to the innermost track by pressing the minus (-) button. The sled can be moved to the outermost track by pressing
the plus (+) button.
• When the BAND button is pressed, the machine enters the CLVA (servo ON) and the mute is turned OFF if data is read successfully. When
the BAND button is pressed again, the machine enters the rough servo.
• When the CD button is pressed then, the track jumps to the second session and the machine exits the CD TEST-2 (MANUAL) mode.
• When the OFF button is pressed, the CD playback is stopped. If the CD button is pressed again, the machine repeats operations from the
focus search.
SECTION 3

TEST MODE

SEGMENT
WAKE UP TRACK
CD PLAY MODE
CD
SRUFFLE
TRACK
— 8 —
(LCD segment)
KEY SEGMENT
CLOCK AM, PM,
OFF A CD
CD CD H
RADIO RADIO
TRACK
REP, 1, ALL, SHUFFLE, CD
TUEN + B RADIO
TUEN – B BUZZER
F-E BALANCE ADJUSTMENT
TRACKING GAIN ADJUSTMENT
FOCUS BIAS ADJUSTMENT