1.
Connect the signal cable from the signal generator to the monitor.
2.
Face the CRT screen to east so as not to be influenced by magnetic force.
3.
4.
Turn ON the Power Switch, and degauss the entire screen with degausser. è See "EXTERNAL DEGAUSS".
5.
Perform adjustment by setting the brightness to center and the contrast to maximum, except where
specifically indicated.
6.
Receive MODE 5 and turn ON the Power Switch. Perform adjustment after a warm-up of at least an
hour.
7.
Adjustment data is automatically saved in the memory when the on screen display disappears, when
another signal is received, or pressing the Menu and – Buttons at the same time.
Note: This monitor should be checked and adjusted by connecting it to a signal generator, then entering
and running the timing charts both below and of Chapter 2.
Comp
–
–
–
–
O
–
–
–
Sync
on
green
–
–
–
–
O
–
–
–
40.27
36.76
31.778
30.30
21.00
9.09
8.68
8.47
fH
(kHz)
24.8
27.3
31.5
33.0
47.6
110.0
115.0
118.0
The resolutions are only for your reference when using Leader 1604A.
*
Resolution*
640×400
608×420
640×400
712×419
1024×720
384×1152
400×666
400×1200
Sync polarity
H
V
N
N
N
N
N
P
N
N
N
N
P
P
P
P
P
P
Horizontal (µsec)
B
A
3.04
4.41
3.813
2.01
2.00
0.80
0.89
0.87
C
3.99
2.21
1.907
0.99
2.36
1.48
1.14
1.13
- 1 -
D
30.39
27.94
25.422
26.96
15.76
6.41
6.38
6.22
E
2.85
2.20
0.636
0.34
0.88
0.40
0.27
0.25
O
17.719
16.652
14.268
16.665
16.695
11.108
6.249
10.660
Vertical (msec)
P
0.322
0.074
0.064
0.061
0.084
0.027
0.026
0.025
Q
1.007
0.771
1.112
3.636
0.420
0.582
0.416
0.455
R
16.108
15.439
12.711
12.696
15.115
10.472
5.781
10.171
S
0.282
0.368
0.381
0.272
1.076
0.027
0.026
0.009
ADJUSTMENT MODE
ADJ.MODE
E2PROM
S1
PWB-RS
Short-connector
There are two different modes available to adjust the monitor as described below. The adjustment with ‘o’ in front
of the title are only available under User Mode. The adjustments with ‘n’ in front of the title are only available under
Factory Mode. You can perform the other adjustments by either User or Factory Mode. Please change the mode
as required.
USER MODE:
Turn ON the Power Switch and you are in the User Mode.
FACTORY MODE: There are two ways to enter the Factory Mode.
1. Turn OFF the Power Switch. Connect the Iiyama short-connector to the RS connector on the PWBMAIN and set S1 switch on the PWB-RS of the short-connector to ADJ.MODE side. Turn ON the Power
Switch and you are in the Factory Mode. The following menu appears on the screen when you press the
MENU Button. Turn OFF the Power Switch and remove the short-connector from the RS connector to exit.
RS connector
PWB-MAIN
CRT
CRT face
2. Turn ON and OFF the Power Switch while pressing the MENU Button. Turn ON the Power Switch again while
pressing the – Button and you are in the Factory Mode. The following menu appears on the screen when you
press the MENU Button. Turn OFF the Power Switch to exit.
DF DP
The menu items in the Factory Mode are as follows:
Contrast
Brightness
V-size
V-position
H-size
H-position
Pin-cushion
Trapezoid
Parallelogram
Side-pin-balance
Side-pin-corner
Cushion-side
DEGAUSS
Uniform-VCENT
Uniform-V-TB
Uniform-HCENT
Uniform-H-RL
Landing-TL
Landing-TR
Landing-BL
Landing-BR
N-S RRC
DBF-Para
DBF-Phase
H-moire
H-convergence
V-convergence
Tilt-dy
V-linear-S
V-linear-C
Auto-da-test1
Auto-da-test2
Auto-da-test3 *
CRT Check
* Auto-da-test3 helps you to perform H/V-BLANKING and H/V-CONVERGENCE confirmations in this
SET-UP ADJUSTMENTS. The following items are displayed automatically in turn.
1. H/V-convergence è 2. Tilt-dy è 3. N-S RRC è 4. Landing-TL/TR/BL/BR è 5. H/V-blanking
- 2 -
EXTERNAL DEGAUSS
Make sure you disable the Landing-TL/TR/BL/BR and N-S RRC settings before performing the external degauss.
Follow the procedure below depending on the adjustment mode you are in.
PROCEDURE
USER MODE
o
1) Select Degauss and press the MENU Button so that the Landing-TL/TR/BL/BR and N-S RRC will be
disabled.
2) Degauss the entire screen with degausser while the Degauss is activated (approx. 6 seconds).
FACTORY MODE
n
1) Select CRT Check and press the MENU Button so that the Landing-TL/TR/BL/BR and N-S RRC will
be disabled.
2) Confirm that the OSD stays displayed on the screen.
Note: If the OSD disappears, restart from 1).
3) Degauss the entire screen with degausser.
4) Press the MENU Button twice to turn off the OSD.
LOCK OUT FACILITY
User adjustable items can be restricted to the following three lock out types by setting the lock out facility as
described below.
Lock out type
A
B
C
PROCEDURE
1.To make the lock out facility available
1) Minimize the contrast with the front buttons.
2) Turn OFF and ON the Power Switch.
3) When degaussing starts, press the MENU, – and + Buttons in turn so that the lock out facility is activated.
Lock out type is switched in alphabetical order when you repeat the button operation.
2. To cancel the lock out facility
1) Minimize the contrast with the front buttons.
2) Turn OFF and ON the Power Switch.
3) When degaussing starts, press the MENU, + and – Buttons at the same time. Then, press the MENU, –
and + Buttons in turn so that the lock out facility is canceled.
Note: This button operation should be performed while degaussing.
Menu * / Adjustment item available
Menu 1
Menu 1, 3, 5
Contrast, Brightness
* It shows the number of the standard menu page.
- 3 -
1-1. 80V-ADJ adjustment [PWB-MAIN]
Receive a cross-hatch inverted signal of MODE 5 when applying the AC
1)
voltage of 110±10V.
Connect the DC voltmeter between CONNECTOR TP and GND (chassis).
2)
Adjust the voltage to DC 80±0.5V with VR930 (+B ADJ).
3)
1-2. ANODE VOLTAGE adjustment [PWB-MAIN]
WARNING !
VR501 (HV-ADJ) has been carefully factory-adjusted for each unit in order
to satisfy regulations regarding X-radiation.
Further adjustment on VR501 shall not be performed.
In case of adjustment, the adjusted position of VR501 must be fixed by a
soldering iron to prevent it from rotating.
1)
Receive a cross-hatch inverted signal of MODE 5.
2)
Turn OFF the Power Switch.
3)
Connect a high-voltage probe between CRT anode and GND (chassis).
4)
Turn ON the Power Switch.
5)
Adjust the high-voltage to 27.0±0.1kV with VR501 (HV-ADJ).
Voltage
VR930
Voltage
+B ADJ
6)
Confirm the variation of high-voltage is within ±0.2kV when receiving MODE
1 and MODE 6 respectively.
7)
Turn OFF the Power Switch and remove the high-voltage probe.
1-3. SCREEN VOLTAGE adjustment [PWB-MAIN]
1)
Receive a cross-hatch inverted signal of MODE 5.
2)
Turn ON the Power Switch.
3)
Connect a high-voltage probe between LEAD-CONNECTOR SC on the
PWB-MAIN / CONNECTOR SC on the PWB-VIDEO and GND (chassis).
4)
Adjust the screen voltage to 630±10V with SCREEN VR located lower of
T501 (FBT).
Note: SCREEN VR should not be turned after the adjustment above.
VR501
T501(FBT)
HV-ADJ
Voltage
E
R
E
C
S
N
- 4 -
1-4. POWER FACTOR CIRCUIT confirmation [PWB-MAIN]
1)
Receive a cross-hatch inverted signal of MODE 5.
2)
Turn OFF the Power Switch.
3)
Connect the DC voltmeter between TP4 and TP0.
4)
Turn ON the Power Switch.
5)
Confirm that the voltage is DC 400±10V.
6)
Remove the DC voltmeter.
1-5. TEMPERATURE SENSOR confirmation
n
1)
Receive a cross-hatch inverted signal of MODE 5.
2)
Select CRT Check and press the MENU Button.
3)
Confirm that respective temperature of fan and monitor front displayed
on the screen is as follows: actual temperature ±5°C.
1-6. FREE-RUNNING adjustment
n
1)2)Receive a cross-hatch inverted signals of fH 27.3kHz and 115.0kHz
respectively.
CRT Check
····
|||||
30
Fan
····
···········
30
Monitor front
Confirm that FREE-RUNNING adjustment is automatically performed.
1-7. FH-LIMITER confirmation
n
1)
Receive a cross-hatch inverted signal of fH 24.8kHz.
2)
Confirm that the picture disappears. Also, make sure the horizontal
oscillation frequency is within the specified range: 55-70kHz.
3)
Receive fH 27.3kHz and confirm that the picture is synchronized.
4)
Receive fH 118.0kHz and confirm that the picture disappears. Also, make
sure the horizontal oscillation frequency is within the specified range above.
5)
Receive fH 115.0kHz and confirm that the picture is synchronized.
6)
Turn OFF the power of signal generator and confirm that the picture
disappears. Also make sure the horizontal oscillation frequency is within
the specified range above.
7)
Remove the frequency counter.
1-8. H-SIZE LIMIT adjustment
n
1)2)Receive a cross-hatch inverted signals of fH 33.0kHz and 110.0kHz
respectively.
Adjust the horizontal size (H-size) to make it full-scan.
- 5 -
Picture
Picture
Raster rolling
Raster tearing
1-9. H-BLANKING confirmation
n
1)
Receive a cross-hatch inverted signal of MODE 5.
2)
Minimize the horizontal size (H-size) with the front buttons.
3)
Select Auto-da-test3 and press the MENU Button so that the automatic
confirmation program starts.
4)
Confirm that X of the right hand side figure is as follows: X </= 3.0mm.
5)
Adjust the horizontal size roughly with the front buttons.
1-10. V-BLANKING confirmation
n
1)
Receive a cross-hatch inverted signal of MODE 5.
2)
Adjust the vertical size and position (V-size and V-position) of the picture
roughly with the front buttons.
3)
Select Auto-da-test3 and press the MENU Button so that the automatic
confirmation program starts.
4)
Confirm that the back-raster is not rolling or tearing at the top.
5)
Confirm that no retrace line is over the picture.
Raster rolling
x
Picture
1-11. V-LIN adjustment
n
1)
Receive a cross-hatch inverted signal of MODE 5.
2)
Adjust the vertical size so that the size is 270±4mm.
3)
Adjust the vertical linear corner (V-linear-C), so that difference between A
and B of the right hand side figure is as follows: | A–B | </= 0.5mm
4)
Adjust the vertical linear side (V-linear-S), so that A, B and C are almost
equal.
1-12. H-CENT adjustment [PWB-MAIN]
n
1)
Receive a cross-hatch inverted signal of MODE 5.
2)
Adjust the horizontal size and position of the picture roughly with the front
buttons.
3)
Maximize the brightness so that the back-raster appears on the screen.
4)
Set S501 to the right, center or left so that A and B in the right hand side
figure are almost equal.
5)
Return the brightness to center indication.
S501
Right
Back-raster
A
Picture
Bezel
A
C
B
Left
B
n
1-13. TILT-DY adjustment
1)2)Receive a cross-hatch inverted signal of MODE 5.
Adjust the tilt deflection yoke (Tilt-dy) with the +/– Buttons so that X of the
right hand side figure is as follows: | X | </= 0.5mm.
X
- 6 -
1-14. PICTURE SIZE, POSITION AND DISTORTION adjustment (Criteria)
n
1)
Receive a cross-hatch inverted signal of MODE 4.
2)
Adjust the picture size and position to the specified setting below.
H-size: 360±4mm
V-size: 270±4mm
3)
Correct the side distortion with the front buttons so that X of the right hand
H-position: | A–B |<4mm
V-position: | C–D |<4mm
side figure is as follows: | X | </= 0.5mm/30mm when selecting the most
remarkable distortion with the naked eye.
Pin-cushion
Trapezoid
Side-pin-balance
1-15. PICTURE SIZE, POSITION AND DISTORTION adjustment
n
1)
Receive a cross-hatch inverted signal of fH 31.5kHz.
2)
Adjust the picture size, position and distortion roughly with the front buttons
Parallelogram
Side-pin-corner
Cushion-side
to the reference settings below.
H-size: 360±10mm
V-size: 270±10mm
H-position: | A–B |<8mm
V-position: | C–D |<8mm
| X | </= 1.0mm/30mm when selecting the most remarkable
distortion with the naked eye.
A
30mm
C
Picture
D
X
Pin-cushion
Trapezoid
B
Bezel
Picture
Note: The picture should be within the bezel.
3)
Receive a cross-hatch inverted signal of all preset modes respectively.
4)
Adjust the picture size and position to the specified setting below.
H-size: 360±4mm
V-size: 270±4mm
5)
Correct the Pin-cushion and Trapezoid distortion with the front buttons so
that X of the right hand side figure is as follows: | X | </= 0.5 mm/30mm
when selecting the most remarkable distortion with the naked eye.
Note: No other adjustment items for distortion than the above should be
adjusted.
1-16. RESET confirmation
o
1)
Receive a cross-hatch inverted signal of MODE 5.
2)
Change the horizontal position (H-Position) roughly with the front buttons.
3)
Perform Reset.
4)
Confirm that the adjustment data above is reset to the factory setting.
H-position: | A–B |<4mm
V-position: | C–D |<4mm
Side-pin-balance
Parallelogram
Side-pin-corner
Cushion-side
- 7 -
1-17. Automatic COLOR adjustments
n
WARNING:
Do not change the horizontal and vertical sync signal or the frequency
while the automatic COLOR adjustments are underway.
Color analyzer setting:
Luminance unit switch: cd/m
l
B.P.S. DIP switch: 9600 (1000)
l
Turn ON the color analyzer switch and press 0-CAL switch before use.
l
1)
Be sure to enter the Factory Mode by using the short-connector.
2)
Connect the interface adapter from RS-232C of the color analyzer to the
PWB-RS of the short-connector.
3)
Select BNC for the signal input and receive a white window signal of MODE 4.
4)
Turn OFF the R, G and B outputs on the signal generator.
5)
Apply a color analyzer probe to the center of the screen.
6)
Turn ON the Remote Switch of the color analyzer so that “G” will appear
on the screen to inform that automatic CUT-OFF adjustment starts.
7)
Turn ON the R, G and B outputs on the signal generator when “GBRIN”
appears on the screen so that the COLOR TEMPERATURE and
CONTRAST LIMIT adjustments start automatically.
cd/m²
2
Luminance unit switch
1
0
B. P. S. DIP switch
fL
<COLOR TEMPERATURE>
The X and Y specified readings of the color analyzer are as follows:
CT 1 (9300K)
X: 0.283±0.006
Y: 0.297±0.006
CT 2 (6500K)
X: 0.313±0.006
Y: 0.329±0.006
CT 3 (5000K)
X: 0.345±0.006
Y: 0.352±0.006
<CONTRAST>
The specified contrast range is 120±6cd/m2.
Note: “G” appears again on the screen to indicate the contrast is not
within the specified range above. In that case, repeat 4) to 7).
8)
“END” appears on the screen to inform that the adjustments are completed.
9)
Turn OFF the Remote Switch of the color analyzer.
Note: The adjustments above can be repeated by turning OFF and ON the
Power Switch.
1-18. GRAY SCALE confirmationn
1)2)Receive a 16-gradation gray scale signal of MODE 4.
Make sure the 15th gradation on the gray scale is barely visible when the
16th gradation (back raster) is not visible at all.
- 8 -
n
1-19. BRIGHTNESS adjustment [PWB-MAIN]
1)
Receive an entire white raster signal of MODE 4.
2)
Apply a photometer to the screen center.
3)
Adjust VR502 (ABL-ADJ) so that photometer reads 105±5cd/m2.
1-20. SYNC SIGNAL INPUT confirmation
n
1)
Receive a cross-hatch inverted signal of fH 47.6kHz.
2)
Select composite and sync on green signal inputs respectively by the
signal generator.
3)
Confirm that the picture is displayed normally.
1-21. SIGNAL SELECT confirmation
1)
Receive a cross-hatch inverted signal of MODE 5.
2)
Switch the signal input to BNC and D-SUB respectively.
3)
Confirm that the picture is displayed normally.
Brightness
VR502
ABL-ADJ
1-22. POWER MANAGEMENT confirmation
o
1)
Turn OFF the Power Switch and connect a digital wattage meter.
2)
Turn ON the Power Switch.
3)
Receive a cross-hatch inverted signal of MODE 5.
4)
Turn OFF the R, G and B outputs on the signal generator.
5)
Disconnect the H/HV and V cables.
6)
Confirm that the input wattage is 5W or less and the Power Indicator turns
to orange.
7)
Connect the H/HV and V cables and confirm that the picture appears.
8)
Turn OFF the Power Switch and remove the digital wattage meter.
9)
Turn ON the Power Switch.
1-23. H-CONVERGENCE confirmation
n
1)
Receive a cross-hatch inverted signal of MODE 5.
2)
Select Auto-da-test3 and press the MENU Button so that the automatic
confirmation program starts.
3)
Confirm that the horizontal line is diverged.
- 9 -
1-24. V-CONVERGENCE confirmation
n
1)
Receive a cross-hatch inverted signal of MODE 5.
2)
Select Auto-da-test3 and press the MENU Button so that the automatic
confirmation program starts.
3)
Confirm that the vertical line is diverged.
1-25. RASTER REGULATION (DYNAMIC) confirmation
n
1)
Receive an entire white signal of MODE 5.
2)
Set the input signal by the signal generator as follows:
V-DISP-TIME: 150 V-POSI-TIME: 450
3)
Maximize the brightness or set the signal level to 0.9Vp-p by the signal
generator.
4)
Confirm that <W of the right hand side figure is 1.0mm or less when
turning the luminance volume on the signal generator to the maximum
and “1” respectively.
5)
Return the brightness to center indication.
Back-raster
Picture
W
FOCUS-B
FOCUS-A
1-26. FOCUS [PWB-MAIN]
n
1)
Receive a green cross-hatch signal of MODE 5.
2)
Adjust FOCUS-A VR of T501 (FBT) to make the vertical lines sharpest at
points L, M and R as shown in Fig 1.
3)
Adjust FOCUS-B VR of the T501 to make the horizontal center line
sharpest at points L, M and R as shown in Fig. 1.
4)
If the focus at points T and M is as shown in Fig. 2, adjust VR503 (V-DBF)
to make the horizontal lines have the same thickness at points T, M and
B. And adjust the FOCUS-B VR again to make the horizontal lines sharpest
at points T, M and B. (VR503 should not be adjusted when focus at points
T and M is optimum.)
5)
If the focus at points L and M is as shown in Fig. 3 or vice versa, adjust
DBF-Para to make the horizontal center line have the same thickness at
points L, M and R. And adjust the FOCUS-B VR again to make the
horizontal center line sharpest at points L, M and R. (DBF-Para should
not be adjusted when focus at points L and M is optimum.)
6)
Repeat 2) to 5) until the focus is optimum.
7)
Confirm no focus variation on the entire screen.
8)
Check the focus with red and blue respectively.
9)
Receive a H-character signal and repeat 7).
10)
Repeat the FOCUS adjustments until the focus with red, green and blue
is optimum.
SCREEN
Focus
VR503
L
Fig.1
Fig.2
L
Thin
Thick
T501(FBT)
V-DBF
M
T Thin
M Thick
B Thin
M
Thick
R
R
- 10 -
Fig.3
1-27. LUMINANCE DIFFERENCE adjustment
n
1)
Receive an entire white signal of MODE 5.
2)
Apply a photometer to C (center), T (top), B (bottom), L (left) and R (right)
in the right hand side figure.
3)
Confirm that the luminance difference between C and T, C and B, C and L,
C and R is within ±10cd/m2 respectively.
4)
If the luminance difference is not within the specified range above, perform
the following adjustments:
<Point T or B>
1. Adjust Uniform-VCENT first to increase the brightness of T and B.
T
L
C
B
R
2. Adjust Uniform-V-TB so that the luminance difference between C and
2
T or C and B is within ±10cd/m
.
<Point R or L>
1. Adjust Uniform-HCENT first to increase the brightness of point L and R.
2. Adjust Uniform-H-RL so that the luminance difference between C and
L or C and R is within ±10cd/m
2
.
1-28. LUMINANCE DIFFERENCE confirmation
1)
Receive an entire white signal of MODE 5.
2)
Apply a photometer to the two points where the luminance difference is
remarkable with the naked eye.
3)
Confirm that the luminance difference is 22.5cd/m2 or less.
TL
T
L
C
B
TR
R
BRBL
- 11 -
1-29. TCO requirement
1-29-1. VLF adjustment [PWB-MAIN]
Note: The VLF adjustment requires the precise measuring conditions. Make
sure the adjustment is carried out in the following environment.
1.
All metal parts should be attached to the monitor.
2.
All the electrical equipment used for the adjustment including the
monitor should be grounded to the same outlet.
Set the monitor and the electric field meter with tilt of zero degree at
3.
a distance of 29.5±0.5cm so that the CRT face will be parallel to the
electric field meter.
No other monitors should be placed in the area with a radius of 1.5m
4.
behind the center of monitor, between the monitor and the electric
field meter and 1.0m behind the electric field meter.
Keep at least 20cm between the monitors.
5.
The VLF level of background should be 0.3V/m or less when the
6.
monitor power cable is disconnected.
Receive a H-character inverted signal of MODE 6.
1)
Adjust the contrast so that the brightness at screen center is 60±5cd/m2.
2)
Set the brightness to center indication.
3)
Turn VR5T2 (VLF-2) fully counterclockwise.
4)
Adjust VR5T1 (VLF-1) so that the electric field meter reads the VLF level
5)
0.95V/m or less.
Monitor
Electric field meter
Monitor
20cm
VLF level
VR5T1 VLF-1
VR5T2 VLF-2
1.5m
29.5+0.5cm
1.0m
In case that the VLF level is not within the specified range above, adjust
6)
VR5T2.
In case that the VLF level is still not within the specified range above, turn
7)
VR5T2 fully clockwise and adjust VR5T1.
In case that the VLF level is still not within the specified range above,
8)
adjust VR5T2.
- 12 -
1-30. ITC (Integrated Tube Component) adjustments
n
The following ITC adjustments should be made only when a new picture tube is installed, or convergence is poor.
All set-up adjustments above-mentioned must be completed before any further ITC adjustment is attempted.
Receive an entire white raster signal and turn ON the Power Switch. Perform adjustment after a warm-up of at least
an hour.
Perform the following adjustments by setting H-convergence and V-convergence to center indication.
Notes: See Chapter 5 concerning parts list for the ITC adjustments.
* PURITY MAGNET should not be turned during the ITC adjustments.
< Top view >< Side view >
PURITY MAGNET*
4-POLE MAGNET
6-POLE MAGNET
LOCKING RING
BOW MAGNET
Y
Y
V
X
CRT face
HC
Y
H
Y
VS
V
DIFFERENTIAL
COIL
X
V
DEFLECTION
YOKE
SEPARATOR
1-30-1. LANDING correction
Landing meter setting:
Mode Select Switch: Monitor Normal
l
Note: Mode Select Switch should be set before turning on the power switch of the landing meter.
Volt:2V
l
Time:50ms
l
Gain:7
l
Unit:% for LND-070, 0.8µm (1%=0.8µm) for LND-072
l
1)
Face the CRT screen to east and set it vertically.
Degauss the entire screen with degausser. è See "EXTERNAL DEGAUSS".
2)
3)
Select DEGAUSS and press the MENU Button.
Receive an entire green signal.
4)
Adjust the horizontal size to make it full-scan.
5)
Apply the landing meter to TL (top-left), TR (top-right), BL (bottom-left) and
6)
BR (bottom-right) in the right hand side figure.
Confirm that "H" reading of the landing meter is within ±20% at each point.
7)
Adjust N-S RRC with the front buttons so that the "H" reading difference
8)
between T (top) and B (bottom) in the right hand side figure is as follows:
| T-B | = ±3%.
TL
BL
T
B
20mm
TR
BR
20mm
Adjust Landing-TL, TR, BL and BR respectively with the front buttons so
9)
that "H" reading of the landing meter at each point is as follows:
TL: –8 to –2%TR/BL: 0 to +6% BR: –6 to 0%
- 13 -
1-30-2. Yvs adjustment
Notes: 1. This adjustment should be performed only when the picture
distortion in the right hand side figure is permitted.
2. Be sure to perform the 1-30-6. YV adjustment after this
adjustment because the convergence adjusted by YV volume
is changed at the same time during this adjustment.
1)
Receive a cross-hatch inverted signal.
2)
Adjust the specified Yvs volume so that the picture distortion is corrected.
1-30-3. STATIC CONVERGENCE adjustment
Receive a red and blue cross-hatch signal.
1)
Adjust the 4-POLE MAGNET so that red and blue beams converge on the
2)
center cross lines.
Add green to the red and blue cross-hatch signal.
3)
Adjust the 6-POLE MAGNET so that red and blue beams converge with
4)
green beam on the center cross lines.
Repeat the adjustment until red, blue and green beams converge each
5)
other.
Fix the 4-POLE MAGNET and the 6-POLE MAGNET by turning the
6)
LOCKING RING.
Bezel
Picture
R
B
G
R,B
R,G,B
Picture
B
R,B
Picture
R
G
R,G,B
Mark the 4-POLE MAGNET and the 6-POLE MAGNET with paint marker
7)
(090Z029A01) so that adjusted position is understandable.
1-30-4. BOW MAGNET adjustment
1)
Receive a red and blue cross-hatch signal.
2)
Adjust the BOW MAGNET so as to straighten an arched horizontal line.
Note: Must be careful not to misconverge vertical lines by this adjustment.
3)
Perform the 1-30-3. STATIC CONVERGENCE adjustment so as to converge
the red and blue lines.
Adjust the DIFFERENTIAL COIL so that the horizontal cross line converge
each other.
R
B
B
R
R
B
R,B
- 14 -
R
B
R,B
B
R
1-30-6. YV adjustment
1)
Receive a red and blue cross-hatch signal.
2)
Adjust the specified YV volume so that red and blue beams converge
each other at the upper and lower edges of the horizontal line.
B
R
R
B
R,B
R,B
1-30-7. YH adjustment
1)
Receive a red and blue cross-hatch signal.
2)
Adjust the specified YH volumes so that vertical cross lines converge
each.
1-30-8. SCREEN-CORNER MISCONVERGENCE correction
Receive a red and blue cross-hatch signal.
1)
Affix a *ferrite sheet (890Z003A02/890Z003A03) between SEPARATOR
2)
and CRT corresponding to the partially misconverged areas.
Note: Must be careful not to affect distortion by this correction.
Fix the ferrite sheet with ACETATE-TAPE (890P306A10).
3)
10
Y HYHC
R
B
B
R
B
R
R
B
10
Ferrite
100
70
(890Z003A02)
(890Z003A03)
(in mm)
*Ferrite sheet
- 15 -
P
Q
R
S
O
V-parameters
O: Total period
P: Sync.width
Q: Back porch
R: Active video
S: Front porch
Video
Sync
2. TIMING CHART
- 16 -
Mode
VESA Timing Name
640×480
1
640×480
2
800×600
3
1024×768
4
B
@ 60Hz
@ 85Hz
@ 85Hz
@ 85Hz
C
fH
(kHz)
31.469
43.269
53.674
68.677
D
A
fV
(Hz)
59.940
85.008
85.061
84.997
E
Sync polarity
H
V
Comp
N
N
N
N
P
P
P
P
H-parameters
A: Total period
B: Sync.width
C: Back porch
D: Active video
E: Front porch
Sync
on
green
–
–
–
–
31.778
–
23.111
–
18.631
–
14.561
–
Horizontal (µsec)
A
B
3.813
1.556
1.138
1.016
C
1.907
2.222
2.702
2.201
D
25.422
17.778
14.222
10.836
E
0.636
1.556
0.569
0.508
O
16.683
11.764
11.756
11.765
Vertical (msec)
P
0.064
0.069
0.056
0.044
1.048
0.578
0.503
0.524
Q
R
15.253
11.093
11.179
11.183
S
0.318
0.023
0.019
0.015
1280×1024
5
6
1600×1200
@ 85Hz
@ 85Hz
91.146
106.250
85.024
85.000
P
P
–
P
P
–
10.971
–
9.412
–
1.016
0.837
1.422
1.325
8.127
6.972
0.406
0.279
11.761
11.765
0.033
0.028
0.483
0.433
11.235
11.294
0.011
0.009
3. IC APPLICATION
Ref No. Description
Deflection circuit
IC350 UPC1884CT
IC401 LA7840LVertical output
IC502 SLA5041FET array
IC503 324
IC205 78055V regulator
IC206 PQ6RD083
IC304 78055V regulator
IC351 781212V regulator
IC702 7812
IC709 78055V regulator
IC930 3842Main power control
IC931 MIP0223SYSub power control
IC932 MC34262/
MC33262
IC960
IC961
IC962
IC211M62393PD/A converter
IC301 741Z610-10Main microprocessor
IC302 M51951BSL Power voltage watcher
IC303 24C08E2PROM
781212V regulator
3842Variable B control
UPC1093J/
KIA431
H&V synchronous signal processor
with geometrical compensation, H&V
oscillator
Amplifier (H-size, Distortion
control)
Power circuit
6.3V regulator (to CRT heater voltage)
12V regulator
Power factor control
Over voltage, Arc and X-ray protect
control
Microprocessor circuit
Application
Ref No. Description
Sub microprocessor circuit
IC701
IC703
IC501
IC101 M52755SP
IC102
IC201
IC202
IC203
IC207
IC210
IC704
IC705
IC706 LA6510/
IC707
IC708
741Z611-10
M62393PD/A converter
High voltage circuit
MSPAD104
24LC21
M52742ASP Video amplifier
LM2403TVideo output
M35045On screen display control
M52759SPUniformity control
324Amplifier (Cut-off control)
LA6510/
TA8410AK
LA6510/
TA8410AK
TA8410AK
LA6510/
TA8410AK
TMC3000NF
Application
Sub microprocessor
High voltage control
Video circuit
Signal switch
DDC
CRT circuit
Power amplifier
(TILT+/–, NS+/–)
Power amplifier
(H-CONV+/–, V-CONV+/–)
Power amplifier
(TL+/–, BL+/–)
Power amplifier
(TR+/–, BR+/–)
Terrestrial magnetic sensor
Note: Specifications of Main microprocessor and Sub microprocessor are on next page.
- 17 -
Main microprocessor specifications
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
Name
H-LIN2
H-LIN1
DRIVE
SW
S.O.G.
GND
N.C.
N.C.
N.C.
500KHz
84-SDA
84-SCL
GND
GND
GND
GND
Vss
+ KEY
GND
GND
GND
GND
GND
– KEY
MENU
GND
CLAMP
DEG
PS1
LED-O
LED-G
Vss
H-LIN2 switching signal output
H-LIN1 switching signal output
DRIVE switching signal output
BNC/D-SUB switching signal
S.O.G.
GND
N.C.
N.C.
N.C.
CLOCK signal output for 1884 counter
1884 DATA input/output terminal
1884 CLOCK terminal
GND
GND
GND
GND
GND
Front-key signal input terminal
GND
GND
GND
GND
GND
Front-key signal input terminal
Front-key signal input terminal
GND
CLAMP
Degauss control signal output
POWER-SAVE control signal output 1
LED control signal output (Orange)
LED control signal output (Green)
GND
Function
Pin
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
Name
Avref.
AVDD
EP-SDA
EP-SCL
CS6
CS5
CS4
CS3
CS2
CS1
GND
GND
GND
GND
X1
X2
VDD
RxD
TxD
DIAG
V-SYNC
RESET
GND
S.O.G.
D/A-SCL
OSD-CS
OSD-SCL
SUB-SCL
SUB-SDA
SUB-SDA
Pre-SCL
Pre-SDA
Function
5V Vcc
5V Vcc
E2PROM DATA terminal
2
E
PROM CLOCK terminal
Cushion-S switching signal 6
Cushion-S switching signal 5
Cushion-S switching signal 4
Cushion-S switching signal 3
Cushion-S switching signal 2
Cushion-S switching signal 1
GND
GND
GND
GND
X'TAL 8MHz
X'TAL 8MHz
5V Vcc
Automatic adjustment DATA output terminal
Automatic adjustment CLOCK terminal
Automatic adjustment DATA input terminal
IIC-BUS reference signal input terminal
Main microprocessor RESET signal input terminal
GND
S.O.G.
D/A CLOCK output terminal
OSD SELECT signal output terminal
OSD CLOCK input/output terminal
Sub E2PROM CLOCK terminal
Sub E2PROM DATA input terminal
Sub E2PROM DATA output terminal
Pre-Amp CLOCK output terminal
Pre/OSD/DA-DATA output terminal
- 18 -
Sub microprocessor specifications
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Name
DA-SDA
DA-SCL
N.C.
N.C.
GND
RESET
X0
X1
GND
N.C.
M-SDA
M-SDA
M-SCL
N.C.
Function
D/A DATA input/output terminal
D/A CLOCK output terminal
N.C.
N.C.
GND
Sub microprocessor RESET signal input
terminal
X'TAL 4MHz
X'TAL 4MHz
GND
N.C.
2
Main E
Main E2PROM DATA input terminal
Main E2PROM CLOCK terminal
N.C.
PROM DATA output terminal
Pin
28
27
26
25
24
23
22
21
20
19
18
17
16
15
Name
ON-TIME
Temp.
AD-Vref
5V
N.C.
N.C.
GND
GND
GND
X
Y
N.C.
N.C.
N.C.
Function
5V Vcc
N.C.
POWER-ON time detection
Temperature detection
N.C.
A/D reference voltage 5V
GND
GND
GND
Magnetism sensor detection
Magnetism sensor detection
N.C.
N.C.
N.C.
- 19 -
4. CIRCUIT DESCRIPTION
4-1. POWER FACTOR circuit
Q The full-wave rectified voltage waveform from D942 and smoothed voltage waveform from C926 are multiplied and
compared to R the voltage waveform from current detect resistor R925 of Q934. Q934 is turned off when R
exceeds Q, and is turned on when R is 0V. The above repetition is to change input current to substantially
sinusoidal waveform and it corrects harmonic distortion. The switching frequency is not constant as Q934 is turned
on or off by monitoring input voltage and load current. Therefore, this circuit is not synchronized with the MAIN
POWER circuit.
Switching frequency is minimum when input voltage is low and load current is maximum, in other words, the
switching frequency is maximum when input voltage is high and load current is minimum. (Switching frequency is
approx. 20-250kHz)
This circuit is operated by the voltage supplied to IC932 from the SUB POWER circuit so that it is not activated at
power management state.
0V
AC
90-132/
198-264V
D942
T932
IC932
5
D943
7
Q934
To pin 1
of IC932
R925
POWER FACTOR circuit
C926
0V
R926
R927
R928
+400V
DC
0V
- 20 -
4-2. MAIN POWER circuit
400V is supplied to this circuit from the POWER FACTOR circuit. This circuit is fly-back type circuit which includes
IC930 controls PWM (Pulse Width Modulation) CONTROL circuit. The T930 secondary provides the following DC
voltages:
Q 80V line:Supplied to the DBF (Dynamic Beam Focus), HIGH VOLTAGE OUTPUT CONTROL,
and the CUT-OFF CONTROL circuits and the VIDEO OUTPUT IC as power source.
R 28.5V line: Supplied to the HORIZONTAL DEFLECTION OUTPUT (Variable B voltage control) and the
HORIZONTAL DRIVE circuits as power source.
S 16V line:Supplied to the VERTICAL DEFLECTION OUTPUT circuit as power source.
Divided 16V line is regulated to 12V by IC960 and supplied to the HORIZONTAL DEFLECTION
OUTPUT and HIGH VOLTAGE OUTPUT CONTROL and VIDEO SIGNAL PROCESSING circuits,
regulated to 12V by IC351 and supplied to the CONTROL SYSTEM circuit, regulated to
12V by IC702 and supplied to the CRT CORRECTION circuit and TERRESTRIAL MAGNETIC
SENSOR (IC708), regulated to 5V by IC709 and supplied to SUB MICROPROCESSOR
(IC701), D/A CONVERTER (IC703) and TEMPERATURE SENSOR as power source.
T –12V line: Supplied to the VERTICAL DEFLECTION OUTPUT and the CRT CORRECTION circuits as
power source.
U B9 voltage: The 28.5V line is pressured up to B9 voltage by the PWM CONTROL circuit which includes
(35-155V) IC961 and Q962. The voltage from the D973 cathode is supplied to the HORIZONTAL
DEFLECTION OUTPUT and the HIGH VOLTAGE OUTPUT circuits as power source.
This circuit is controlled by the voltage supplied from the SUB POWER circuit and it is not activated at power
management state. Therefore, no secondary provides the DC voltages.
AC
90-132/
198-264V
D942
IC930
POWER FACTOR
circuit
6
Q930
R932
T930
2
3
1
28.5V
16V
80V
IC961
4
–12V
L961
6
D973
Q962
R966
5
IC702
IC709
IC960
IC351
B9 (35-155V)
12V
5V
12V
12V
16V
- 21 -
4-3. SUB POWER circuit
IC931 included in this circuit consists of the POWER MOS-FET and the CONTROL circuits and modulates the
pulse width. The current fed back from pin 9 of T931 is input to the control terminal of IC931. The T931 primary
provides the DC voltage (approx. 20V) to the POWER FACTOR and the MAIN POWER circuits as power source.
The T931 secondary provides the DC voltage (approx. 8.5V). Divided 8.5V line is regulated to 5V by IC304 and
supplied to the MAIN MICROPROCESSOR (IC301), IC350, VIDEO SIGNAL SWITCHING (IC101), DDC (IC102)
and TEMPERATURE SENSOR, regulated to 6.3V by IC206 and supplied to the CRT heater voltage, also regulated
to 5V by IC205 and supplied to the VIDEO AMPLIFIER (IC201), OSD CONTROL (IC203) and D/A CONVERTER
(IC211) as power source. The voltage at pin 1 of IC931 is 5.7V generally. This circuit is not synchronized with MAIN
POWER circuit as the oscillation frequency is fixed to approx. 100kHz.
400V
5.7V
1
POWER FACTOR and
MAIN POWER circuits
To
IC931
20V
T931
3
D964
8.5V
IC304
IC206
IC205
5V
CRT heater
5V
4-4. PROTECTION circuit
To prevent damage to the monitor, X-ray radiation etc., the POWER FACTOR and the MAIN POWER circuits stop
in the following cases:
+16V line: The voltage exceeds 23V.
+8.5V line: The voltage exceeds 15V.
+400V line: The voltage exceeds 460V.
Variable B voltage line: The voltage exceeds 200V.
X-ray protection circuit: The voltage exceeds 30kV.
Arc limit circuit: The beam current exceeds 2.9mA.
4-5. DISPLAY POWER MANAGEMENT circuits
(1) Stand-by / Suspend state:
When receiving no video signal and no horizontal or vertical sync signal for 6 seconds, pin 29 of IC301 turns to
5V from 0V. PC930 is turned on to stop power supply to the POWER FACTOR and the MAIN POWER circuits.
The power consumption is 10W or less.
(2) Active-off state:
When receiving no video signal and no horizontal and vertical sync signals for 6 seconds, pin 29 of IC301 turns
to 5V from 0V. Also, pin 16 of IC301 turns to 5V from 0V so that IC204 is turned on. The output from IC206 stops
and the heater voltage is turned off. The power consumption is 6W or less.
4-6. DEGAUSS circuit
As K930 is turned on when the power on, the degauss current flows through degauss coil and PR930 to degauss
the CRT. After approx. 6 seconds from power on, K930 is turned off automatically. As for manual degauss by the
adjustment item of Degauss, the degauss is performed in the same way.
- 22 -
4-7. SIGNAL PROCESSING circuit
500kHz
Pin 29 of IC350
Input signal from D-SUB or BNC connector is converted to the waveform by IC101. The input signal is applied to pin
17 of IC101 from the MAIN MICROPROCESSOR (IC301) and then switched to D-SUB when pin 17 of IC101 is
“HIGH” level (5V), or to BNC when pin 17 of IC101 is “LOW” level (0V). When only one of the two signal inputs is
connected to the signal source, the one connected is automatically selected. When both of the signal inputs are
connected to the signal source, the latest one connected just before power off is selected. The adjustment item of
Signal Select also selects D-SUB or BNC. The selected input signal is converted to the waveform by IC101. The
sync signal is input to IC350 and the video signal is input to IC201.
4-8. SYNC SIGNAL PROCESSING circuit
The input sync signal to IC350 is processed inside IC350
as follows:
Q Detect the input sync signal presence
R Discriminate the input sync signal type: Separate /
Composite / Sync On Green
S Discriminate the sync polarity: Positive / Negative
T Count the frequency
500kHz clock signal supplied to pin 29 of IC350
counts the frequency. The frequency is sent to the
MAIN MICROPROCESSOR (IC301) to store Q-T in the E2PROM as a read data.
H/V
INPUT
MAIN MICROPROCESSOR
SWITCHING
IC301
4-9. CONTROL SYSTEM circuits
4-9-1. H-SIZE and DISTORTION CORRECTION CONTROL
VIDEO
SIGNAL
IC101
IIC-BUS
H/V
H&V SYNCHRONOUS
SIGNAL PROCESSOR
H&V OSCILLATOR
IC350
The parabolic wave output from pin 9 of IC350 is adjusted and converted to the waveform by IC503 and then input to
pin 2 of IC961.
a (Approx. 8V): DC bias....H-size control
b (Approx. 1Vp-p): AC amplitude....Distortion control
b
a
0V
Pin 9 of IC350
The parabolic wave input to pin 2 of IC961 is added to the PWM waveform from pin 6 of IC961. The V-parabolic wave
modulates the variable B voltage to perform distortion correction.
c
c: H-size adjustment level
0V
Variable B voltage waveform
(D973 cathode)
- 23 -
4-9-2. HORIZONTAL OSCILLATION
A drive pulse output from pin 17 of IC350 is amplified by Q350 and then applied to Q504 gate of the DRIVE circuit.
0.7V
0.2V
0V
Pin 17 of IC350Inversion-amplified
waveform by Q350
12Vp-p
4-9-3. VERTICAL OSCILLATION
The sawtooth-wave is output from pin 8 of IC350 and applied to the VERTICAL DEFLECTION OUTPUT circuit.
a (Approx. 6.5V): AC amplitude....V-size control
b (Approx. 3.5V): DC bias....V-position control
a
Pin 8 of IC350
Reference voltage 5V
(Pin 23 of IC350)
b
4-10. HIGH VOLTAGE OUTPUT CONTROL circuit
The AFC waveform is output from pin 6 of L501 and applied to IC501. The duty-controlled voltage waveform is output
from pin 1 of IC501 and amplified by Q521 and then applied to T501. The applied voltage is amplified by T501 and
supplied to the CRT as anode voltage.
4-11. HORIZONTAL DEFLECTION OUTPUT circuit
The drive pulse is output from pin 17 of IC350 and amplified by Q350. The drive pulse is supplied to Q503 base via
HORIZONTAL DEFLECTION circuit and current-amplified.
4-12. VERTICAL DEFLECTION OUTPUT circuit
The sawtooth wave from pin 8 of IC350 is supplied to pin 5 of IC401 and amplified, and then supplied to the vertical
DY as sawtooth wave current. Vertical deflection is performed by the magnetic field generated when supplying the
current to the vertical DY.
+15V
Reference voltage 1.7V
Pin 2 of IC401
–10V
- 24 -
4-13. DYNAMIC BEAM FOCUS circuit
The H-parabolic wave from pin 13 of IC350 is amplified by 18 times by Q518 and Q519 respectively. The amplified
parabolic wave is pressured up to 500vp-p by T503 and combined with V-parabolic wave and then added to pin 13
of T501.
5V
2V
0V
Pin 13 of IC350
V-parabolic wave from pin 12 of IC350 is amplified by Q520 and combined with H-parabolic wave.
5V
3V
0V
Pin 12 of IC350
4-14. SWITCHING SIGNAL circuit (CS SWITCHING POINTS)
Each switching point performs horizontal linear and distortion correction as follows:
IC301 output pin
CS6
DRIVE
H-LIN1
fH (kHz)
23.5 - 28.0
28.1 - 34.0
34.1 - 41.0
41.1 - 45.0
45.1 - 49.0
49.1 - 59.0
59.1 - 66.0
66.1 - 73.0
73.1 - 84.0
84.1 - 88.5
88.6 - 97.0
97.1 - 115.0
CS1
(Pin 55)
LOW
LOW
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
CS2
(Pin 56)
LOW
HIGH
LOW
LOW
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
CS3
(Pin 57)
LOW
LOW
LOW
HIGH
LOW
LOW
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
CS4
(Pin 58)
LOW
LOW
LOW
LOW
LOW
HIGH
LOW
LOW
HIGH
HIGH
HIGH
HIGH
CS5
(Pin 59)
LOW
LOW
LOW
HIGH
LOW
LOW
LOW
HIGH
LOW
HIGH
HIGH
HIGH
(Pin 60)
HIGH
HIGH
HIGH
HIGH
HIGH
LOW
LOW
LOW
HIGH
LOW
LOW
HIGH
(Pin 3)
LOW
LOW
LOW
LOW
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
(Pin 2)
LOW
LOW
LOW
LOW
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
H-LIN2
(Pin 1)
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
LOW
LOW
LOW
- 25 -
4-15. VIDEO and ON SCREEN DISPLAY CONTROL circuits
The video signal from CN101 or CN102 is terminated to 75Ω. The video signal is switched to D-SUB or BNC by the
VIDEO SIGNAL SWITCHING circuit that is controlled by the MAIN MICROPROCESSOR (IC301). The adjustment
item of Signal Select selects D-SUB or BNC. The selected video signal is amplified by IC201. The OSD signal from
IC203 is combined with the video signal by IC201. The OSD signal is controlled by the MAIN MICROPROCESSOR.
The V-sawtooth wave from pin 8 of IC350 and V-bias voltage from pin 4 of IC211 are combined by IC207. The AFC
pulse wave and H-bias voltage from pin 7 of IC211 are also combined by IC207. The H and V-parabolic waves are
combined and input to IC201 to correct UNIFORMITY. The combined signal adds H/V blanking signal and is applied
to IC202. Then the video signal is amplified to approx. 50Vp-p by IC202, and then fed to the respective CRT
cathodes, KR, KG, and KB.
CN101
CN102
FRONT KEY
R
G
B
R
G
B
VIDEO
SIGNAL
SWITCHING
IC101
IIC-BUS
OSD CONTROL
OSD-CS
OSD-SCL
OSD-SDA
MAIN MICROPROCESSOR
IC301
V
Pin 19 of IC201
OSDR/G/B/BLK
IC203
DA-LD
DA-SCL
DA-SDA
R
G
B
CONVERTER
VIDEO
AMPLIFIER
IC201
BLK
CLAMP
D/A
IC211
5V
2V
0V
R
G
B
R/G/B/BRIGHTNESS
V-bias/V-gain/V
PH/
Pin 27 of IC201
VIDEO
OUTPUT
IC202
CUT-OFF
CONTROL
IC210
H-bias/H-gain
5Vp-p
R
G
B
CRT CATHODE
UNIFORMITY
IC207
IC350
V-SAW
AFC
4-16. RED, GREEN, BLUE CUT-OFF and BRIGHTNESS CONTROL circuits
The DC voltages (0-5V) from pins 12, 13, 14 and 15 of IC211 are amplified by IC210, Q2R2, Q2G2 and Q2B2
respectively. The respective amplified voltages control the DC voltage level of CRT cathode by automatic adjustments
of RED, GREEN, BLUE CUT-OFF and BRIGHTNESS.
- 26 -
4-17. LANDING CORRECTION circuit
This circuit detects the followings to correct LANDING discoloration.
•Magnetic field.....TERRESTRIAL MAGNETIC SENSOR (IC708) detects the magnetic field.
•SWITCH ON DRIFT.....TH801 detects surrounding temperature. Thermistor attached to the funnel detects the
When the above condition is changed, the SUB MICROPROCESSOR (IC701) informs the change to the D/A
CONVERTER (IC703). The output signal from IC703 is amplified by IC704, IC706 and IC707 to correct LANDING
discoloration automatically by the coils N-S RRC, TL, TR, BL and BR.
The LANDING correction also can be performed with the front buttons.