JVC XV-N30BK(MK3) Service Manual page 21

4.7.3 Adjustment
(1) Set the main body at test mode.
(2) Press the "CHOICE" key of the remote controller three times, and the FL display is displayed "CK".
(3) Insert a test disc (VT-501), and press the "PLAY" key of the main body.
(4) After a few seconds, press the numeric key "6" of the remote controller. Then, the FL display is displays a jitter value.
(5) Turn the adjustment screws on the underside of the traverse mechanism with phillips screw driver until the maximum jitter value
is displayed on the FL display. (In this model, a bigger jitter value means a better result.)
NOTE:
• Reference values to judge whether the jitter is allowable or not are displayed, instead of actual jitter values.
• Please be sure to perform "all-initialization" and "optimization adjustment of front end parameter" after adjusting.
Traverse mechanism assembly
Loading mechanism assembly
Screw a
4.8 Upgrading of firmware
The latest firmware for upgrading is updated in "Optical disc CSG" page in JS-net.At the time of service, compare the version of the
product and the latest version, and upgrade the old version into the latest version.
(1) Press "POWER" key of the main body to turn the main body on
(2) Insert the upgrade disc.
(3) When FL display of the main body changes from "READ" to "UP", press "cursor UP" key ( ) of the remote controller.
(4) The entire screen becomes blue, and upgrading starts.
(5) The tray opens automatically. Remove the upgrade disc.
(6) The screen returns to the normal screen. Then, press "POWER" key of the main body. When the stand-by indicator is lighted,
upgrading is completed.
(7) Set the main body at test mode, and perform initialization. Then, confirm the version of the firmware.
Firmware upgrade Disc ... press UP
After inserting the up-grade disc
STANDBY/ON
DISPLAY
TITLE/
3D PHONIC GROUP RETURN CANCEL
UP key
1 2 3
(for firmware upgrade)
5 6
4
8
7 9
10 0 +10
ANGLE SUB TITLE AUDIO ZOOM
TOP MENU MENU
CHOICE key
CHOICE ENTER
(switch of mode)
SLOW VFP ON SCREEN
PREVIOUS SELECT NEXT
CLEAR
Screw c
POINT:
Turn the adjustment screws a, b, and c in
the right direction. And turn the adjustment
screws a, b, and c in the left direction.
Then, turn the screws a, b, and c
respectively in either the right or the left
direction to increase the number of jitter.
(The turning direction may depend on
each of a, b, and c.)
Screw b
Upgrade application initializing...
While upgrading (blue screen)
POWER key FL Display
When up-grade is completed
(for test mode)
STOP key
(for test mode)
PAUSE key
OPEN/CLOSE key
(for initialize)
NO DISC
PLAY key
(No.XA014)1-21