Cd Player Adjustment; How To Check The Laser Power - Kenwood RXD-M32MD Service Manual

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CD player adjustment

No. ITEM
SETTING
TEST MODE: While pressing the CD PLAY key, turn the power on.
1 LASER
POWER
LASER
2
CURRENT
FOCUS
3 ERROR
BIAS
Note:
Type 4disc :SONY YEDS-18 Test Disc or equivalent. (KTD-02)
LPF : Around 47kΩ + 390pF or so.
(a) Laser Power
TE
L 13942296513
Pickup

How To Check the Laser Power

1. Set the test mode.
(The CD tray is opened automatically.)
2. To close the CD tray, press the OPEN/CLOSE key.
3. Move the pickup to outward by pressing the TAPE REC key.
www
.
INPUT OUTPUT
SETTING
Set the senor section
of the optical power
–
meter on the pickup
lens.
Connect the DC volt-
Test disc
meter to CN3 (3, 4)
Type 4
on X32.
Connect an oscillo-
scope as follows.
Test disc
CH1: RF(CN3, 1)
Type 4
GND : VC(CN3, 2)
X32
0.05~0.15 mW
Optical power meter
x ao
y
i
ADJUSTMENT
8
PLAYER
SETTING
Press the "PLAY" key
to check that the dis-
play is "03".
Press the "PLAY" key
to check that the dis-
play is "03" or "05"
Press the "PLAY"
key. Confirm that the
display is "05".
Q Q
(d)
3 6 7 RF signal: AC coupled 1 3
¶
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.
u163
.
RXD-M32MD
2 9 9 4 2 8
ALIGNMENT
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
–
220mV to 550mV
VR 1 Optimum eye pattern
1 5 0 5 8 2 9 9 4
m
co
9 9
FIG.
(a)
(d)
2 8 9 9
15