JVC KD-DV6105 Service Manual page 28

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4.5.4 DVD unit check mode 3 7 63 1515 0
Change LCD indication with a [FF
Check item list
No. A/D key
1 [1] Start at normal speed
(After start, it is measured JITTER on the
internal position)
2 [2]
Tracking off on the outermost position of CD
3 [3] Tracking off on the innermost position of CD
4 [4] CD_LD lights and laser current is displayed
5 [5] DVD_LD lights and laser current is displayed
6 [6] DVD x1 jitter measuring mode
(for use in mechanism measurement)
7 [DISP] Indication of EEPROM contents
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L 13942296513
8 [SOURCE]
Initialization of EEPROM contents
9 [SEL]
Indication of temperature
10 [MODE] Search & jitter measurement to an appointed
position of DVD
11 [BAND]
Setting of MONITOR terminal
12 [DISC UP ] DVDx1 double speed start
(After start, it is measured JITTER on the
internal position)
13 [DISC DW ]
Disc stopped & LD-OFF
14 [EJECT] OPEN
Note 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 disk. Even other disks start DVD1 layer.
When No.1 and No.12 are pushed after jitter indication, a focus jump is executed. (only DVD2 layer)
Stop a disk before OPEN, CLOSE by all means. (OPEN and CLOSE are not executed in a disk turn.)
The check mode can be exited either by pressing the [POWER] key or by resetting the unit.
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DVD unit operation
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Example of
LCD indication
NORMPLAY
CUR Laser current value
JIT Jitter value
EF-BAL
OUTRKOFF For EF phase error
EF-BAL
INTRKOFF For EF phase error
CDLD ON
CUR Laser current value
JIT Jitter value
DVDLD ON
CUR Laser current value
JIT Jitter value
DVD JITR
CUR Laser current value
JIT Jitter value
ROM DATA
ADDR EEPROM address
Q Q
DATA EEPROM contents
3 6 7 1 3 1 5
ROMCLEAR
JD4-TEMP
TEM Temperature
DVD-DL
PLC (Position measured with VT-501)
JIT Jitter value
MONITOR
M1
M2
PLAY
CUR Laser current value
JIT
Jitter value
STOP
DSC OPEN
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9 4 2 8
Indication contents
0 5 8 2 9 9 4 2 8
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9 9
9 9