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:AFWER buttonADJ) on the MAIN
while pressing the P (pause) button.board to Ground, and turn on the power supply plug to the outlet.
All FL segments and grids light up together with the á (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 one.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
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 tabp(stop) ble, 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 turn on 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 check
Note: The same operations are also performed in the following when
the test point (TP301:ADJ) is connected to Ground after turn-2
ing on the power.
Y Direct search (movement of sledding motor) is not performed dur-
ing accessing1
Y Ignored even when GFS becomes L
Y Ignored even when the Q data cannot be read
Y Focus gain does not decreaseGrid check
Y Spindle gain does not decrease
Y Servo related settings can be set manually and checked (Refer to
ADJ Mode Special Functions Table)
PROGRAMREPEAT 1REMOTE
ADJ Mode Special Functions Table
Y When the jog dial is rotated to the right, the Block indicators of FL(The buttons shown with ( ) function by using the sup-
plied remote commander only)
light up in the order of 1n2..8n1.
ButtonFunctionY When the jog dial is rotated to the left, the Block indicators of FL
Servo average displaylight up in the order of 8n7..1n8.CONTINUE
Displays VC, FE, RF, TE and traverse in hexadecimal
numbersY The standby LED lights up when the door switch is shut.
SHUFFLEFocus bias display
Each time this is pressed, the focus bias is switchedY Abbreviation
between 1 and 2 FL: Fluorescent Indicator Tube
(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
numbersR337
BLOCK 1 (1)Increases the focus bias in 8 steps.IC307TP301R311
BLOCK 2 (2)Sets the focus bias in the middle of aliasing.ADJ
BLOCK 3 (3)Turns off the tracking and sledding servoR310TP302
BLOCK 4 (4)Returns the auto gain to the initial value (30)AFADJ
BLOCK 5 (5)Turns off the focus servo
BLOCK 6 (6)Decreases the focus bias in 8 steps.
BLOCK 7 (7)Re-adjusts the focus biasIC301
BLOCK 8 (8)Turns on the tracking and sledding servo
(9)Switches the focus servo gain between normal and down
08: normal, 0C: 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 directlyed in y.
N 12 N |
ACEC
SONY
