Adjustment - Kenwood CD-425M Service Manual

CD-425M/4260M/4700M/DPF-J6030
No. ITEM
1. With pressing the REPEAT KEY, turn the power on to enter the test mode.
2. Set the Test disc to Disc NO. 1.
3. Close the door.
FOCUS ERROR
1
BIAS
LASER CURRENT
2
CHECK
Note:
Type 4 disc :SONY YEDS-18 Test Disc or equivalent.
LPF : Around 47kΩ + 390 pF or so.
FIG. (d)
8

ADJUSTMENT

INPUT OUTPUT
SETTING SETTING
Test disc Connect an oscillo-
Type4 scope as follows.
/KTD-02 CH1:RF (CN2-1)
Connect the DC volt-
Test disc meter to LASER
Type4 CURRENT CHECK
LAND on X32.
RF signal
PLAYER ALIGNMENT
SETTING POINT
Press the PLAY
/PAUSE key . FE BIAS
Confirm that the VR1
display is "05".
Press the PLAY
/PAUSE key to
-
check that the dis-
play is 03 or 05.
¶ 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. (FE BIAS)
ALIGN FOR FIG.
Optimum eye
(d)
pattern
0.5±0.2V