Test Mode - Sony CDP-CX260 Service Manual

4-1. DISPLAY CHECK MODE
With the power turned off (standby state), press the 1/u button
while pressing the P (pause) button.
All FL segments and grids light up together with the · (play),
P (pause), and STANDBY LEDs.
At the same time, the GROUP LEDs are lights up simultaneously.
Note: To exit this mode, press the p (stop) button.
4-2. 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.
The power will turn on automatically, and the first track will be
played.
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
• Spindle gain does not decrease
• Servo related settings can be set manually and checked (Refer to
ADJ Mode Special Functions Table)
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
Focus bias display
SHUFFLE
Each time this is pressed, the focus bias is switched
between 1 and 2
(1)
Bias actually set
(2)
U:Upper aliasing bias
Auto gain display
PROGRAM
Displays focus, tracking, sledding in hexadecimal
numbers
GROUP 1 (1) Increases the focus bias in 8 steps.
GROUP 2 (2) Sets the focus bias in the middle of aliasing.
GROUP 3 (3) Turns off the tracking and sledding servo
Returns the auto gain to the initial value (30)
GROUP 4 (4)
Turns off the focus servo
GROUP 5 (5)
Decreases the focus bias in 8 steps.
GROUP 6 (6)
GROUP 7 (7) Re-adjusts the focus bias
GROUP 8 (8) Turns on the tracking and sledding servo
Switches the focus servo gain between normal and down
(9)
FG. norm: normal, FG. down: down
Sets the focus bias to 0 (no bias)
(10/0)
Next, displays the jitter measured at the focus bias set
CHECK S-curve observation mode.
(Exits this mode when the p button is pressed.)
CLEAR
Automatic eccentric measurement
The results of measurement is displayed in µm directly.
SECTION 4

TEST MODE

Function
Optimum bias Minimum jitter
L:Lower aliasing bias
4-3. 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.
• All FL segments and grids will light up. (All lit check)
When a button is pressed, the types of buttons pressed until then
will be displayed on the left side and the number of the buttons
will be displayed on the right side. 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.
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..8n1.
• When the jog dial is rotated to the left, the GROUP LEDs light up
in the order of 8n7..1n8.
• Abbreviation
FL: Fluorescent Indicator Tube
[ MAIN BOARD ] – Component Side –
– 12 –
(Refer to FL Tube Check Patterns)
(Refer to FL Tube Check Patterns)
The pause LED also lights up simultaneously.
The play LED also lights up simultaneously.
Magnified
C D
CN506
6
1
RV501
R540
DISC SENSOR
TP2
ADJUSTMENT
(AFADJ)
IC501
TP1
(ADJ)
E
R531