Adjustment - Kenwood MDX-F1 Service Manual

MDX-F1
CD player adjustment
No. ITEM
SETTING
Step 1~3 are in TEST MODE
TEST MODE : While pressing the [CD] key, plug the AC power cord into the AC power wall outlet.
LASER
1
POWER
Test disc
LASER
2
CURRENT
FOCUS
Test disc
3 ERROR
BIAS
Note:
Type 4disc :SONY YEDS-18 Test Disc or equivalent. (KTD-02)
LPF : Around 47kΩ + 390pF or so.
(a) Laser Power
Pickup
16

ADJUSTMENT

INPUT OUTPUT
SETTING
Set the senor section
of the optical power
–
meter on the pickup
lens.
Connect the DC
voltmeter
Type 4
to CN7(#1 and #2)
Connect an
oscilloscope as
follows.
Type 4
CH1: RF(CN7, #4)
GND : VC(CN7, #3)
0.05~0.15 mW
Optical power meter
PLAYER ALIGNMENT
SETTING POINT
Short circuit S601
and S602 (X09).
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"
key. Confirm that the VR201
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)