Test Mode - Sony CDP-CX200 Service Manual

4-1. Display Check Mode
With the power turned off (standby state), press the POWER 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 scanned one by one.
Note: To exit this mode, press the POWER button.
4-2. ADJ Mode
1. Turn ON the power of the unit, set disc to disc table, and perform
chucking.
2. Disconnect the power supply plug from the outlet.
3. To set ADJ mode, connect the test point (TP301:ADJ) of the MAIN
board to Ground, and turn on 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 (TP301:ADJ) is connected to Ground after turn-
ing 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
Servo average display
CONTINUE
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
Auto gain display
PROGRAM
Displays focus, tracking, sledding in hexadecimal
numbers
Increases the focus bias in 8 steps.
BLOCK 1 (1)
Sets the focus bias in the middle of aliasing.
BLOCK 2 (2)
Turns off the tracking and sledding servo
BLOCK 3 (3)
Returns the auto gain to the initial value (30)
BLOCK 4 (4)
Turns off the focus servo
BLOCK 5 (5)
Decreases the focus bias in 8 steps.
BLOCK 6 (6)
Re-adjusts the focus bias
BLOCK 7 (7)
Turns on the tracking and sledding servo
BLOCK 8 (8)
Switches the focus servo gain between normal and down
(9)
08: normal, 0C: down
Sets the focus bias to 0 (no bias)
(10/0)
Next, displays the jitter measured at the focus bias set
S-curve observation mode
CHECK
Automatic eccentric measurement
CLEAR
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 (TP302:AFADJ) on the MAIN
board to Ground, and turn on 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
(Refer to FL Tube Check Patterns)
P(pause) button: FL grid check (Refer to FL Tube Check Patterns)
The pause LED also lights up simultaneously.
·(play) button: All FL segment and grid will light up
The play LED also lights up simultaneously.
FL Tube Check Patterns
Segment check
Grid check
PROGRAM
• When the jog dial is rotated to the right, the Block indicators of FL
light up in the order of 1n2..8n1.
• When the jog dial is rotated to the left, the Block indicators of FL
light up in the order of 8n7..1n8.
• The standby LED lights up when the door switch is shut.
• Abbreviation
FL: Fluorescent Indicator Tube
[ MAIN BOARD ] — Component Side —
IC307
— 12 —
2
1
REPEAT 1
IC303
R337
TP301
R311
ADJ
R310
TP302
AFADJ
IC301
REMOTE