PC BOARD (Component side view)

RXD-V525/V626/V727/V828
10
CD player adjustment
NO. ITEM
INPUT
SETTINGS
ADJUSTMENT
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]
[1]
[2]
LASER
POWER
LASER CURRENT
CHECK
-
Test disc
type4
Set the sensor
section of the
optical power meter
on the pickup lens.
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".
Press the
PLAY/PAUSE key to
check that the display
is "03" or "05".
(Caution) Connect and remove to the tester for the laser current check at POWER OFF condition.
FOCUS ERROR
BIAS
Test disc
type4
Connect an
oscilloscope as
follows.
CH1:RF(CN1:1pin)
GND:VC(CN1:4pin)
(Note) Type 4 disc: SONY YEDS-18 test disc or equivalent. (KTD-02)
Press the
PLAY/PAUSE key .
Confirm that the
display is "05".
(a) Laser Power (b) Test point
(d)
Pickup
RF signal: AC coupled
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.
CN2
NC
TE1
TE2
VC CN1
FE2
FE1
RF
VR1
Q1
R8
-
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.
- 500–200mV
FE BIAS
VR1
FRONT
(a)
Optimum eye pattern (b) (d)
X32
(Component side)