JVC XV-NA77SL Service Manual page 18

4.6 Display of current value of laser
(1) Set the main body at test mode.
(2) Press "CHOICE" key of the remote controller four times. 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.
The number shown in the FL display shows mA of current value of laser.
The first two numbers ("25" in "2530") shows current value of laser at the time of adjustment after the latest all-initialization, 25mA
in this example.
The last two numbers ("30" in "2530") shows the present current value of laser, 30mA in this example.
The first two numbers ("25" in "2530") usually shows current value of laser at the time of shipment, so you can see how the prod-
uct has been deteriorated by comparing the first two numbers ("25" in "2530") and the last two numbers ("30" in "2530").
CD:
The laser current value of 49 mA or less is normal.
The laser current value of over 50 mA is not normal. Laser diode of the pickup has been deteriorated.
DVD:
The laser current value of 64 mA or less is normal.
The laser current value of over 65 mA is not normal. Laser diode of the pickup has been deteriorated.
To return to test mode, press "STOP" key of the main body.
4.7 Flap adjustment of the pick-up guide shaft
Please perform flap adjustment of the pick-up guide shaft in the following case:
• Just after you exchange the pick-up.
• Just after you exchange the spindle motor.
• Just after you exchange the traverse mechanism base.
NOTE:
Please perform flap adjustment of the pick-up guide shaft when you exchange the parts above and also when you remove the
parts above.
• When the reading accuracy of the signal is bad (There is a block noise in the screen, Screen stops in the outer circumference of a
disc, etc.)
1 key (automatic adjustment)
5 key (laser of DVD)
TV DVD
STANDBY/ON
OPEN/
TV DVD
CLOSE
TV1 TV2 TV3
1 2 3
TV4 TV5 TV6 6 key
4 5 6
TV7 TV8 TV9
7 8 9
(display of jitter value)
TV-/-- TV0 MUTING
10 0 +10
TITLE/ TV/VIDEO
RETURN PAGE GROUP CANCEL
CH
+
VOL VOL+
4 key (laser of CD)
ENTER
CH
PREVIOUS NEXT
CLEAR SELECT
SLOW- SLOW+
CHOICE key
3D
PHONIC ZOOM VFP
PROGRESSIVE
SCAN
(switch of mode)
ANGLE SUB TITLE AUDIO
fs/Rate
AMP
REPEAT DIMMER VOL
1-18 (No.XA011)
FL Display (Example)
2530 0000
POWER key FL Display
Remote controller "4" key --- Laser of CD
Remote controller "5" key --- Laser of DVD
PLAY key
(for test mode)
STOP key
(for test mode)