SECTION 4
TEST MODE
4-1. Display Check Mode4-3. Key and Display Check Mode
With the power turned off (standby state), press the POTo set this mode, connect the test point (TP302:WER button AFADJ) on the MAIN
while pressing the P (pause) button.board to Ground, and connect the power supply plug to the outlet.
All FL segments and grids light up toágether with the (play),
P (pause), and standby LEDs.Y All FL segments and grids will light up. (All lit check)
At the same time, the GROUP LEDs are scanned one by oneWhen a b.utton is pressed, the types of buttons pressed until then
will be displayed on the left side and the number of the buttons will
Note: To exit this mode, press the POWER button.be displayed on the right side. However, these will not be displayed
for the following special buttons.
4-2. ADJ Mode
1. Turn ON the power of the unit, set disc to disc tap(stop) bble, and perforutton: mFL segment check
chucking.(Refer to FL Tube Check Patterns)
2. Disconnect the power supply plug from the outlet.P(pause) button: FL grid check (Refer to FL Tube Check Patterns)
3. To set ADJ mode, connect the test point (TP301: ADJ) of the MAINThe pause LED also lights up simultaneously.
board to Ground, and connect the power supply plug to the outlet.á(play) button: All FL segment and grid will light up.
The play LED also lights up simultaneously.
The power will turn on automatically, and the first track will be played.
In this mode, table rotation and loading operations are not performedFL Tube Check Patterns
because it is taken that the disc has already been chucked.
Segment checkMagnified
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.
Y Direct search (movement of sledding motor) is not performed dur-
ing accessing
Y Ignored even when GFS becomes L
Grid check
Y Ignored even when the Q data cannot be read
Y Focus gain does not decrease
Y Spindle gain does not decrease
Y Servo related settings can be set manually and checked (Refer to
ABCDE
ADJ Mode Special Functions Table)
ADJ Mode Special Functions Table
Y When the jog dial is rotated to the right, the GROUP LEDs light up
(The buttons shown with ( ) function by using the sup-
in the order of 1n2..8n1.
plied remote commander only)
Y When the jog dial is rotated to the left, the GROUP LEDs light up
ButtonFunction
in the order of 8n7..1n8.
Servo average display
CONTINUE
Displays VC, FE, RF, TE and traverse in hexadecimal
Y The standby LED lights up when the door switch is shut.
numbers
SHUFFLEFocus bias displayY Abbreviation
Each time this is pressed, the focus bias is switched
FL: Fluorescent Indicator Tube
between 1 and 2
(1)
Bias actually set Optimum bias Minimum jitter[ MAIN BOARD ] N Component Side N
(2)
U:Upper aliasing bias L:Lower aliasing bias
PROGRAMAuto gain display
Displays focus, tracking, sledding in hexadecimalIC303
R337
numbers
TP301
IC307R311
GROUP 1 (1)Increases the focus bias in 8 steps.ADJ
GROUP 2 (2)Sets the focus bias in the middle of aliasing.
R310TP302
GROUP 3 (3)Turns off the tracking and sledding servoAFADJ
GROUP 4 (4)Returns the auto gain to the initial value (30)
GROUP 5 (5)Turns off the focus servo
GROUP 6 (6)Decreases the focus bias in 8 steps.IC301
GROUP 7 (7)Re-adjusts the focus bias
GROUP 8 (8)Turns on the tracking and sledding servo
(9)Switches the focus servo gain between normal and down
FG. norm: normal, FG. down: down
(10/0)Sets the focus bias to 0 (no bias)
Next, displays the jitter measured at the focus bias set
CHECKS-curve observation mode
CLEARAutomatic eccentric measurement
The results of measurement is displamm directlyyed in .
N 15 N |
ACEC
SONY
