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_ CLD-2710K
(7) MAIN BOARD ASSEMBLY ADJUSTMENT SUMMARY
|| `
ADJUSTMENT
`
Adjusting Point
Player Condition
Adjusting Specification
:
í
d
3
* Stop
mode
* Adjust VR610 so that the
DC
volta
H
Tilt Offset Adjustment
VR610
. | C902 — (minus) lead wire
товч оп)
be Smas о + дэээ
е
voltage
* Making of Tilt gain VR position
VR608
* Power OFF
Red: Тит to right
Clear: Center
* Test mode
#6,500 still
Grating / VR602
CN401-
9 (TRKG ERR)
TRKG servo open
* Tilt servo NEUTRAL
Blue ; Turn to left
* Null point
^ ТАК error МАХ
e Test mode 99,800 ,
422,000
- 25,000
still
* Adjust VR602 so that the ТАК error
waveform amplitude's positive and
negative level become equal.
TRKG servo open
* TILT servo OFF
* Test mode , 42,701 still
* Adjust the SKIP key so that the FOCS
RTN voltage between #9,800 and
422,000
- 425,000 becomes equal.
TRKG servo loop close
* TILT servo OFF
* Test mode
VR605 (TE MAX)
CN401- 9 (ТАКС ERR)
815,000 / 8115 still
VR606 (RF МАХ)
СМ401-3 (RF)
TRKG servo close /open
* TILT servo OFF
Tilt Servo Gain
Adjustment
Coarse Grating and
Tracking
Balance
Adjustment
Slider Shaft Horizontal
Adjustment
SKIP key
CN401-4 (FOCS RTN)
Pickup assembly
TAN/ ТАК inclination} CN401-3 (RF)
adjustment screw
* RF waveform's amplitude MAX (Pickup
ТАМ / ТАК adjustment screw)
* Minimized crosstalk.
Pickup Inclination
Adjustment
ТАКА Error МАХ /
RF LEVEL MAX
Adjustment
* ТВК error MAX (VR605)
RF MAX (VR606)
* Check crosstalk
* Set VR607 to the center.
* Adjust the adjustment screw so that the
tilt error display code is 6, 7, or 8.
* Adjust VR607so that the tilt error display
becomes 7.
o
BE
қ
Н
* Test mode
Tilt senser inclination|
Video output terminal
416,200
/ #115 still
adjustment screw
TV monitor
VR607 (TILT BAL.)
(Т mode screen
s TRKG Sarvo өр closa
Tilt Sensor Inclination/
Tilt Balance Adjustment
* Test mode
CH1:CN401 - $(TRKG ERR)
й22,000- 25,000 and
* Check that the amplitude of the lissajous
CH2:CN401- 1, 2(TRKG А-С))
#100
figure of the frame #100 is the same as
(X- Y mode)
TRKG servo open
that of the frame #22,000- 25,000.
* TILT servo ON
* Test mode
Я22,000- 25,000 and
#100
TRKG servo open / close
* ТИТ servo ОМ
* Test mode
#6,500 still
TRKG servo open
* TILT servo ON
* Test mode
#15,000 still
Spindle Motor Centering
Check
Spindle motor
CH1:CN401-9(TRKG ERR)
centering adjustment|
CH2:CN40O1 - 1, 2(TRKG A+C)
Screw.
(X- Y mode)
VR609
TRKG servo close
* Tilt servo NEUTRAL
CH1:CN401-6 (FOCS ERR)
|? Test mode
#15,000 still | е Adjust VR604 so that the lissajous figure
VR604
CH2:CN401-7 (FOCS IN)
TRKG servo close
is symmetrical with respect to the X and
(Х-Ү mode)
* TILT servo NEUTRAL
Y axes.
TRKG servo close
is symmetrical with respect to the X and
.
CH1:CN401-9 (TRKG ERR)
ee
Loop Gain
|
СН2:С№ 401-10 (ТАКО IN)
Jus
(X- Y mode)
* TILT servo NEUTRAL
Y axes.
BE ask Ausiment:
| VIT
CH1:CN401-3 (RF)
* Test mode 415,000 stil | « Adjust VR801 so that the RF level
1
* ТИТ servo NEUTRAL
becomes 300mV + 50mV.
Coarse Centering
Centerin
"
СН1:СМ401-9 (TRKG ERR)
|* Test mode #100 still
`
Е
?
|
:
ig adjustment
:
Ж
* Adjust that the X- axis amplitude of the
Ee
for Side B
plate for side B.
SZ mode) 1, 2(TRKG А+С) 5 A
МЕ сийн | close
lissajous figure becomes maximum.
Pickup Tangential Direc- | Pickup tangential
* Test mode
#115 still
tion Angle Adjustment for | direction angle
TRKG servo close
Side B Play
adjustment screw.
* TILT servo ON
* Adjust the centering adjustment screw so
that the lissajous figures of #100 and
#22,000
- 25,000 are the same.
Spindle Motor Centering
Adjustment
CH1:CN401-9(TRKG ERR)
CH2:CN401 - 1, 2(TRK A+C)
(X- Y mode)
* Minimize the Y direction of the lissajous
Fine
Grating
Adjustment
figure.
* Check TRKG balance.
FOCS SUM Level
Adjustment
* Adjust VR609 so that the voltage
CN401- 11 (FOCS SUM)
becomes 1.8V DC.
FOCS Servo Loop Gain
Adjustment
* Test mode
£15,000 still
* Adjust VR603 so that the lissajous figure
Video output terminal
(TV monotor)
* Adjust that the crosstalk is minimized.
* Test mode
#100 still
ТАКА servo open
* TILT servo ON
Fine Centering
Adjustment for Side B
Play
СН1:СМ401-9 (TRKG ERR)
CH2:CN401 - 1, 2(TRKG А+С)
(X- Y mode)
Centering adjustment
plate for side B
* Adjust that the X- axis amplitude of the
lissajous figure becomes maximum.
73
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