Cd Player Adjustment; Laser Power; Rf Signal F Ac Coupled - Kenwood RXD-402 Service Manual

RXD-402/452/502/552/572S/A41/A51
QQ
3 7 63 1515 0

CD player adjustment

No. ITEM
SETTING
Step 1,2 are in TEST MODE
TEST MODE : While pressing the [CD PALY] key, plug the AC power cord into the AC power wall outlet.
LASER
1
POWER
FOCUS
Test disc
2 ERROR
BIAS
Note:
Type 4disc :SONY YEDS-18 Test Disc or equivalent. (KTD-02)
LPF : Around 47k½ + 390pF or so.
(a) Laser Power
TE
L 13942296513
Pickup
(d)

RF signal F AC coupled

RF signal in test mode (PLAY).
www
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.
.
12
ADJUSTMENT
INPUT OUTPUT
SETTING
Set the senor section
of the optical power
–
meter on the pickup
lens.
Connect an oscillo-
scope as follows.
CH1 : RF
Type 4
CH2 : FE1
GND : VC
0.05~0.15 mW
Optical power meter
x ao
y
i
8
PLAYER ALIGNMENT
SETTING
Press the"PLAY"key
to check that the dis-
play is "03".
Press the "PLAY"
key. Confirm that the
BIAS VR1
display is"05"
(b) Test point
Q Q
3 6 7 1 3
RF FE1 FE2 TE2 TE1 VC
VR1
FE. B
u163
.
2 9 9 4 2 8
ALIGN FOR
POINT
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
FE Optimum eye pattern
(DC=±330mV)
X13 FOIL SIDE VIEW
1 5 0 5 8 2 9 9 4
m
co
9 9
FIG.
(a)
(b)
(d)
2 8 9 9