Cd Player Adjustment; How To Check The Laser Power - Kenwood RXD-M32 Service Manual

CD player adjustment

INPUT
No. ITEM
SETTING
TEST MODE: While pressing the CD PLAY key, turn the power on.
1 LASER –
POWER
Test disc
LASER
2
Type 4
CURRENT
FOCUS
Test disc
3 ERROR
Type 4
BIAS
Note:
Type 4disc :SONY YEDS-18 Test Disc or equivalent. (KTD-02)
LPF : Around 47kΩ + 390pF or so.
(a) Laser Power
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.
15
ADJUSTMENT
OUTPUT
SETTING
Set the senor section
of the optical power
meter on the pickup
lens.
Connect the DC volt-
meter to CN3 (3, 4)
on X32.
Connect an oscillo-
scope as follows.
CH1: RF(CN3, 1)
GND : VC(CN3, 2)
X32
0.05~0.15 mW
Optical power meter
PLAYER ALIGNMENT
SETTING POINT
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"
VR 1
key. Confirm that the
display is "05".
(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.
RXD-M32
ALIGN FOR
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
Optimum eye pattern
FIG.
(a)
(d)