Adjustment - JVC UX-S77 Service Manual

4.1 DVD test mode setting method
(1) Unplug the power plug.
(2) Press and hold both "STOP" key and "DISC 5 EJECT/CLOSE" key of the main body.
(3) Insert power plug into outlet while holding the both keys.
(4) "Area code" is indicated on the display.
(5) To release test mode, press "STANDBY/ON" key of the main body.
NOTE:
Each pressing of "MENU" key of the remote controller in test mode changes the mode as follows.
T x x y
D K = x x x x
C H E C K
4.2 Method of displaying device key checksum
(1) Set the main body at test mode.
(2) Press "MENU" key of the remote controller. Then, checksum of device key are displayed in the FL display.
(3) To release test mode, press "STANDBY/ON" key of the main body.
4.3 Display of current value of laser
(1) Set the main body at test mode.
(2) Press "MENU" key of the remote controller twice. Then, FL display is displayed "CHECK".
(3) The laser current value can be switched between the value of CD and that of DVD by pressing the following key of the remote
controller.
(4) Press "4" key of the remote controller. Then, FL display is displayed "CDLD LSR", and laser current of CD is displayed.
(5) Press "5" key of the remote controller. Then, FL display is displayed "DVDLDLSR", and laser current of DVD is displayed.
(6) Press "6" key of the remote controller. Then, FL display is displayed "JITX1", and jitter measurement of DVD is displayed.
FL Display (Example)
To start PLAYING and obtain LASER CURRENT and JITTER value, press "PLAY" key of the remote controller.
To stop JITTER measurement, press "STOP" key of the main body.
4 key
(CD laser current)
5 key
(DVD laser current)

ADJUSTMENT

v w ---- Becomes test mode
---- Checksum of device key
---- Mechanism check mode
Remote controller "4" key --- Laser current of CD
Remote controller "5" key --- Laser current of DVD
c c c c j j j j
Remote controller "6" key --- Jitter measurement mode
STANDBY/ON key
(for test mode)
6 key
(jitter measurement)
MENU key
(switch of mode)
SECTION 4
xx: Area code
(JC/1U/D/E/2U/3U/UB/UT/4U/UY/EE/UF)
y: Region number
v: Study state information from MECHA-CON
w: Initialization state information from MECHA-CON
(Refer to "4.3 Display of current value of laser " and
"4.4 DVD check modes ".)
FL display
DISC 5 EJECT/CLOSE key
(for test mode)
STOP key
(for test mode)
(No.MB230)1-35