Test Mode; Adj Mode; Key And Display Check Mode - Sony CDP-CX300 Service Manual

5-1. ADJ MODE

1. Turn ON the power of the unit, set disc to disc table, and per-
form chucking.
2. Disconnect the power supply plug from the outlet.
3. To set ADJ mode, connect the test point (ADJ) of the MAIN
board to Ground, and connect the power supply plug to the outlet.
In this mode, table rotation and loading operations are not performed
because it is taken that the disc has already been chucked.
Note: The same operations are also performed in the following when
the test point (ADJ) is connected to Ground after turning on
the power.
• Direct search (movement of sledding motor) is not performed dur-
ing accessing
• Ignored even when GFS becomes L
• Ignored even when the Q data cannot be read
• Focus gain does not decrease
ADJ Mode Special Functions Table
(The buttons shown with ( ) function by using the sup-
plied remote commander only)
Button
CONTINUE Servo average display
Displays VC, FE, RF, TE and traverse in hexadecimal
numbers
SHUFFLE Focus bias display
Each time this is pressed, the focus bias is switched
between 1 and 2
(1)
Bias actually set
(2)
U:Upper aliasing bias
PROGRAM Auto gain display
Displays focus, tracking, sledding in hexadecimal
numbers
GROUP 3 (3) Turns off the tracking and sledding servo
GROUP 8 (8) Turns on the tracking and sledding servo
CHECK S-curve observation mode.
(Exits this mode when the 1/u button is pressed.)
SECTION 5

TEST MODE

Function
Optimum bias Minimum jitter
L:Lower aliasing bias

5-2. KEY AND DISPLAY CHECK MODE

To set this mode, connect the test point (AFADJ) on the MAIN
board to Ground, and connect the power supply plug to the outlet.
Note: When this mode is executed, all title memos recorded will be
erased.
• When this button is pressed, "line # No. #" will be displayed.
However, these will not be displayed for the following special
buttons. However, these will not be displayed for the following
special buttons.
p (stop) button: FL segment check
P (pause) button: FL grid check
· (play) button: All FL segment and grid will light up.
TIMER switch:
Each time this button is pressed, the value of the "Go+ ## keys"
increases. Buttons pressed once will not be counted when pressed
again.
FL Tube Check Patterns
Segment check
Grid check
A B
• When the jog dial is rotated to the right, the GROUP LEDs light
up in the order of 1n2..8nHIT LISTnEASY PLAYnMEGA
CONTROLn1.
• When the jog dial is rotated to the left, the GROUP LEDs light up
in the order of 8n 7..1n MEGA CONTROLn EASY
PLAYnHIT LISTn8.
• Abbreviation
FL: Fluorescent Indicator Tube
[ MAIN BOARD ] – Component Side –
– 14 –
(Refer to FL Tube Check Patterns)
(Refer to FL Tube Check Patterns)
The P LED also lights up simultaneously.
· LED also lights up simultaneously.
When the switch position is PLAY , the
STANDBY LED lights up. It goes OFF
when set to OFF .
Magnified
C D E F
CN506
3
1
RV501
DISC SENSOR
IC502
ADJUSTMENT
33
34
23
22
12 11
TP2 (AFADJ) R516
TP1 (ADJ)
R517
G
44
1