Kenwood RXD-251 Service Manual page 14

RXD-251/301/351/371S/A3
CD SECTION
No. ITEM
1 LASER POWER
FOCUS ERROR
2
BIAS
Note:
Type 4 disc : SONY YEDS-18 Test Disc or equivalent.(KTD-0 )
(a) Laser power
Pickup
14
ADJUSTMENT
INPUT OUTPUT
SETTINGS SETTINGS
Apply the sensor section
−
of optical power meter
on the pickup lens.
Connect an oscilloscope
Test disc as follows.
Type 4 CH1 : RF (R07A)
GND : VC (IC01, 48 pin)
0.08 0.15 mW
Optical power meter
PLAYER ALIGNMENT
SETTINGS POINTS
Press the
PLAY/PAUSE key.
Press the FE BIAS
PLAY/PAUSE key. VR01
ALIGNMENT POINT
VC
48pin
IC01
RF
ALIGN
FOR
On the power from
0.08 to 0.15 mW,
when the diffraction
−
grating is correctly
aligned with the RF
level of 0.6 Vp-p or
more.
Optimum eye pattern
CD MECHA.
UNIT
VR01
R07
R07A
R06
FIG.
(a)