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FCS Servo loop gain
adjustment
(Perform with either method
TRK Servo loop gain
adjustment
(Perform with either method
FF level adjustment
Coarse centering
Centering adjustment screw
adjustment for B—side play | for B—side play
Tangential direction
:
TAN adjustment screw for
angle adjustment for
,
,
B-side play
B-side play
Fine centering adjustment
Centering adjustment screw
for
B—side play
for
B—side play
+ Oscilloscope
* GGV1003
- AF Oscillator
+ Resistor (47kQ)
* Oscilloscope
* GGV1003
* Clip ete.
(Short GND—@® pin)
* Oscilloscope
* GGV1003
+ AF Oscillator
* Resistor (47kQ)
* Oscilloscope
+ GGV1003
* Oscilloscope
* GGV1003
* Oscilloscope
* GGV1003
+ MIX resistor
10K
10K
+ © Screwdriver (Large) «
+ Oscilloscope
+ GGV1003
» ® Screwdriver (Medium)
+ Oscilloscope
* GGV1003
* MIX resistor
10K
10K
- © Screwdriver (Large)
CN106
X: @Mpin FCSIN
Y:®pin FCSERR
CN106
Xi-
Y:®@pin FCSERR
@pinGND
(®, ®pin Short)
CN106
X : @pin TRK IN
Y : @pin TRK ERR
CN106
Y : @pin TRK ERR
CN106
@pin (RF)
CHi : CN106—-9
(TRKG ERR)
CH2: CN106—1and 2
(TRKG SUM)
(X-Y¥ mode)
Video output terminal
(TV monitor)
CH1: CN106—9
(TRKG ERR)
CH2: CN106—1 and 2
(TRKG SUM)
(X-¥ mode)
- Test mode
TRK servo ON
Tilt servo ON
- GGV1003
#15,000still
* Test mode
» Stop mode
*F-1
+ Test mode
TRK servo ON
Tilt servo ON
+ GGV1003
#15,000still
Test mode
TRK servo ON
Tilt servo ON
F-1
GGV1003
#15,000still
+ Test mode
TRK servo ON
Tilt servo ON
+ GGV1003
#15,000still
* Test mode
#100still
TRK servo ON/OFF
Tilt servo ON
+ Test mode
#115still
TRK servo ON
Tilt servo ON
+ Test mode
#100still
TRK servo ON/OFF
Tilt servo ON
1, Xch: Connect to @ pin with 47kQ
Ych: Connect to @ pin
2. Search #15,000 of GGV1003 and still the address.
3. Connect AF oscillator between Xch and 47kQ and adjust VR604 until
Lissajous' figure is a circle.
1. ¥ch: connect to®pin. Drop ®pin to GND.
2. Putin GGV1003, press reverse side of skip key and bring F—0 to F—1.
3. Press brake and adjust VR604 until the waveform level is 2.6 Vp—p-£0.1 V.
4. Xch: Connect to. pin with 47kQ
Ych : Connect to @ pin
2. Search #15,000 of GGV1003 and still the address.
3. Connect AF oscillator between Xch and 47kQ and adjust VR603 until
Lissajous' figure is a circle.
'
'
1. Ych: connect to © pin.
2. Search #15,000 of GGV1003 and still the address.
3. Adjust VR603 until the waveform level is 1.6 Vp—pt0.1 V.
1. Search for address #15,000 of GGV1003, still the address, and observe RF
at CH1.
2. Adjust VR601 until RF amplitude is 300mVp—p=50 mV.
Note : Be careful not to turn the centering adjustment screw past its limit.
1. Move carriage Ass'y toward B—side and still with test disc #100. (TRKG ON)
2. Observe TRK ERR (Xch) and TRK SUM (Ych) at the X—Y mode during
TRK Servo OFF.
3. Turn -centering adjustment screw
for B—side play until the Lissajous' figure is
* horizontal.
Note: Be careful not to turn the TAN adjustment screw past its limit.
1. Move carriage Ass'y toward B—side and still with test disc #115. (TRKG ON)
2. Turn TAN adjustment screw for B—side play until RF waveform amplitude
is at its maximum.
3. Check to see that crosstalk on monitor screen is at its minimum.
CLD-D503, CLD-D570
i
Waveform and connection diagram
X: A 0omVidiv
Y: SmVidiv
DC mode
| CN106
rae
X:100mVidiv
Y: SmVidiv
OC mode
CN106
aa
(10)
Y: SomVidiv
Vv: 10mV/div
H: 2msec/div
*
AC mode
CN106
RF
X: 200mV/div
Y:_ 50mV/div
AC mode
Te
Q
a
Adjust untit the Lissajous' figure is horizontal.
If the crosstalk is pronounced, adjust until the crosstalk is not noticeable.
}
Perform fine adjustment again following same steps as in procedure (11)
"Course centering adjustment."
x: 200mv/aiv
¥: SomV/div
AC mode
LK Shion
Q
u
Ls
Adjust until the Lissajous' figure is horizontal.
1-30
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