Adjustment - Kenwood RXD-M32V Service Manual

RXD-M32V
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.
8

ADJUSTMENT

OUTPUT
SETTING
Set the senor section
of the optical power
–
meter on the pickup
lens.
Connect the DC
voltmeter to CN3 (3,
4) on X32.
Connect an
oscilloscope 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
display is "03".
Press the "PLAY" key
to check that the
display 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.
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)