1-30 (No.MA250)
4.6.4 DVD unit check mode
Note :
• In the case of the jitter measurement: Begin a service mode after insert a disc.
• Press key [1] of No.1 before an item in which the No.2 or 3 key is pressed.
• Press key [1] of No.1 or key [12] of No.12 before an item in which the No.10 key is pressed and confirm the indication of jitter
value on the LCD.
• No.6 starts only a DVD1 layer disc. Even other discs start DVD1 layer.
• When No.1 and No.12 are pushed after jitter indication, a focus jump is executed. (only DVD2 layer)
• Stop a disc before OPEN, CLOSE by all means.(OPEN and CLOSE are not executed in a disc turn.)
• The check mode can be exited either by pressing the [POWER] key or by resetting the unit.
Change LCD indication with a [FF ] button and a [REW ] button.
Check item list
Example of
LCD indication
1
[1]
Start at normal speed
NORMPLAY
(After start, it is measured JITTER on the
CUR
Laser current value
internal position)
JIT
Jitter value
2
[2]
Tracking off on the outermost position of CD
EF-BAL
OUTTROFF
For EF phase error
3
[3]
Tracking off on the innermost position of CD
EF-BAL
INNTROFF
For EF phase error
4
[4]
CD_LD lights and laser current is displayed
CDLD ON
CUR
Laser current value
JIT Jitter
value
5
[5]
DVD_LD lights and laser current is displayed
DVDLD ON
CUR
Laser current value
JIT Jitter
value
6
[6]
DVD x1 jitter measuring mode
DVDx1JIT
(for use in mechanism measurement)
CUR
Laser current value
JIT Jitter
value
7
[DISP]
Indication of EEPROM contents
ROM DATA
ADDR
EEPROM address
DATA
EEPROM contents
8
[SOURCE]
Initialization of EEPROM contents
ROMCLEAR
9
[SEL]
Indication of temperature
TEMP
TEMP
Temperature
10
[MODE]
Search & jitter measurement to an appointed
DVD JIT
position of DVD
PLC
(Position measured with
JIT
VT-501 jitter value)
11
[BAND]
Setting of MONITOR terminal
MONITOR
M1
M2
12
[DISC UP
] DVDx1 double speed start
PLAY
(After start, it is measured JITTER on the
CUR
Laser current value
internal position)
JIT
Jitter value
13 [DISC DW
] Disc stopped & LD-OFF
STOP
No.
A/D key
DVD unit operation
Indication contents
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