RXD-V525/V626/V727/V828
10
ADJUSTMENT
CD player adjustment
NO. ITEM
INPUT
SETTINGS
OUTPUT
SETTINGS
CD PLAYER
SETTINGS
ALIGNMENT ALIGN FOR FIG.
NO. [1] :Choose either LASER POWER or LASER CURRENT CHECK. ( Confirm to be satisfied either LASER POWER or LASER
CURRENT CHECK.)
TEST MODE : While pressing the PLAY/PAUSE key ,plug the power code into the AC power wall output.
Insert TEST DISC.
[1]
LASER
POWER
-
Set the sensor
section of the
optical power meter
on the pickup lens.
Press the
PLAY/PAUSE key to
check that the display
is "03".
-
On the power from 0.05
to 0.15mW.When the
diffraction grating is
correctly aligned with
the RF level of 0.8Vp-p
or more.
(a)
[1]
LASER CURRENT
CHECK
Test disc
type4
Set the tester
between both the
check land of R8 (10
‰) on the PCB(X32)
of the set upper.
Press the
PLAY/PAUSE key to
check that the display
is "03" or "05".
- 500–200mV
(Caution) Connect and remove to the tester for the laser current check at POWER OFF condition.
[2]
FOCUS ERROR
(Note) Type 4 disc: SONY YEDS-18 test disc or equivalent. (KTD-02)
BIAS
Test disc
type4
Connect an
oscilloscope as
follows.
CH1:RF(CN1:1pin)
GND:VC(CN1:4pin)
Press the
PLAY/PAUSE key .
Confirm that the
display is "05".
FE BIAS
VR1
Optimum eye pattern (b) (d)
(d)
(a) Laser Power (b) Test point
Pickup
0.05~0.15 mW
Optical power meter
•
RF signal in test mode (PLAY).
•
Perform the tangential and focusing offset are
focused into one point on the display. The crossing
points above and below the center shall also be
looked clearly.
RF signal: AC coupled
FE2
VC
TE2
TE1
NC
VR1
FE1
RF
CN1
CN2
X32
(Component side)
FRONT
Q1
R8
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