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11. ADJUSTMENTS
The Compact Disc Player adjustment are to be
executed in the following order.
e@ Adjustment Items
1. Tracking offset and focus offset adjustments
2. LD (laser diode) power check
3. Focus lock and spindle lock checks
4, Grating adjustment
5. Tracking balance adjustment
6. Tangential adjustment
7. Focus gain adjustment
8. Tracking gain adjustment
9. VCO free-run frequency adjustment
Measuring Equipment
. Dual trace oscilloscope
. Optical power meter
. Test disc (YEDS7)
. Focus and tracking adjustment filters
. Loop gain adjustment bandpass filter
. Signal generator
. Grating driver
. Other regular measuring equipment
BIND
ONEH
@
$401
(POWER)
PD-6010
@ Test Mode
Disc
player
adjustments
are
executed
in test
mode.
Test mode setting and cancellation procedures
(1) Switch POWER
(S401)
on while depressing
the TEST MODE switch (S1).
(2) Then switch the MANUAL
SEARCH
FWD
( b>
) or REV (<kK) switch on to activate
test mode.
(3) Test mode is cancelled by switching POWER
off.
A
The various key functions during test mode are
listed in Table 11-1.
@ Adjustment Controls
VR2:
Tracking offset (TR.OF)
VR8:
Focus gain (FO.GA)
VR4:
Tracking gain (TR.GA)
VR5:
Tracking balance (TR.BL)
VR6:
Focus offset (FO.OF)
VL1:
VCO free run (VCO coil)
TP2
VR6(FO.OF)
g
by
TP4
VR5 (TR.BL)
VR2 (TR.OF)
VR3 (FO.GA)
P —
VR4 (TR.GA)
VL1 (VCO coil)
Fig. 11-1
Adjustment Points
53
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