Adjustment - Kenwood RXD-V525 Service Manual

RXD-V525/V626/V727/V828
CD player adjustment
NO. ITEM
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.
LASER
[1]
POWER
LASER CURRENT
[1]
CHECK
(Caution) Connect and remove to the tester for the laser current check at POWER OFF condition.
FOCUS ERROR
[2]
BIAS
(Note) Type 4 disc: SONY YEDS-18 test disc or equivalent. (KTD-02)
(a) Laser Power
Pickup
(d)
RF signal: AC coupled
•
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.
10

ADJUSTMENT

INPUT OUTPUT
SETTINGS SETTINGS
Set the sensor
section of the
-
optical power meter
on the pickup lens.
Set the tester
between both the
Test disc
check land of R8 (10
type4
‰) on the PCB(X32)
of the set upper.
Connect an
oscilloscope as
Test disc
follows.
type4
CH1:RF(CN1:1pin)
GND:VC(CN1:4pin)
0.05~0.15 mW
Optical power meter
CD PLAYER
ALIGNMENT
SETTINGS
Press the
PLAY/PAUSE key to
-
check that the display
is "03".
Press the
PLAY/PAUSE key to
-
check that the display
is "03" or "05".
Press the
PLAY/PAUSE key . FE BIAS
Confirm that the VR1
display is "05".
(b) Test point
Q1
CN2
R8
NC
TE1
TE2
VC CN1
FE2
FE1
RF
VR1
FRONT
ALIGN FOR FIG.
On the power from 0.05
to 0.15mW.When the
diffraction grating is
(a)
correctly aligned with
the RF level of 0.8Vp-p
or more.
500–200mV
Optimum eye pattern (b) (d)
X32
(Component side)