Iiyama Vision Master Pro 450 User manual

SERVICE MANUAL
September 22, 1998
A901HT
710-1 Kitaowaribe, Nagano-shi 381-0014 JAPAN
IIYAMA ELECTRIC CO., LTD.
opyright
NO. S1998E01

[ Revision Record ]
Rev. Section ontents
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2. TIMING HART..............................................................................................
3. I APPLI ATION...........................................................................................
1. SET-UP ADJUSTMENTS...............................................................................
SAFETY PRE AUTION.............................................................................
5. SERVI E PARTS LIST...................................................................................
6. EXPLODED VIEW.........................................................................................
4. IR UIT DES RIPTION.................................................................................
7. DIAGRAMS...................................................................................................
CONTENTS
Page
54-61
62-64
1-15
16
17-19
20-27
28-53
i-ii
NOTICE
The information in this document is subject to change without notice.

1. SET-UP ADJUSTMENTS
The following adjustments should be made when a complete realignment is required or a new picture tube is
installed.
<Required measuring equipment>
<Preparation>
Signal generator (Programmable video generator)........................ Leader 1604A
D voltmeter (300V D range)
Note: Digital multimeter can also be used.
High voltage probe (0-30kV D )
olor analyzer.......................................................................... Minolta A-100
Photometer............................................................................. Minolta LS-100
Electric field meter.................................................................... ombinova EFM 100
Scale (Two 50cm scales put together so that no visual aberration occurs.)
Frequency counter
Digital wattage meter
Landing meter........................................................................... LSS LND-070 or 072
Degausser
Interface adapter (Iiyama handmade)
Short-connector (Iiyama handmade)
Place the monitor without tilting.
onnect the signal cable from the signal generator to the monitor.
Face the RT screen to east so as not to be influenced by magnetic force.
1.
2.
3.
4.
5.
6.
7.
- 1 -
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 hapter 2.
R
16.108
15.439
12.711
12.696
15.115
10.472
5.781
10.171
Q
1.007
0.771
1.112
3.636
0.420
0.582
0.416
0.455
O
17.719
16.652
14.268
16.665
16.695
11.108
6.249
10.660
D
30.39
27.94
25.422
26.96
15.76
6.41
6.38
6.22
S
0.282
0.368
0.381
0.272
1.076
0.027
0.026
0.009
P
0.322
0.074
0.064
0.061
0.084
0.027
0.026
0.025
E
2.85
2.20
0.636
0.34
0.88
0.40
0.27
0.25
Vertical (msec)
Horizontal (µsec)
3.99
2.21
1.907
0.99
2.36
1.48
1.14
1.13
B
3.04
4.41
3.813
2.01
2.00
0.80
0.89
0.87
A
40.27
36.76
31.778
30.30
21.00
9.09
8.68
8.47
V
N
N
P
N
N
P
P
P
Sync polarity
H
N
N
N
N
N
P
P
P
Resolution*
640×400
608×420
640×400
712×419
1024×720
384×1152
400×666
400×1200
omp
–
–
–
–
O
–
–
–
Sync
on
green
–
–
–
–
O
–
–
–
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.
Turn ON the Power Switch, and degauss the entire screen with degausser. è See "EXTERNAL DEGAUSS".
Perform adjustment by setting the brightness to center and the contrast to maximum, except where
specifically indicated.
Receive MODE 5 and turn ON the Power Switch. Perform adjustment after a warm-up of at least an
hour.
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.
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ADJUSTMENT MODE
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. onnect the Iiyama short-connector to the RS connector on the PWB-
MAIN 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.
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.
The menu items in the Factory Mode are as follows:
Trapezoid
Parallelogram
Side-pin-balance
Side-pin-corner
ushion-side
DEGAUSS
Uniform-V ENT
N-S RR
DBF-Para
DBF-Phase
H-moire
H-convergence
V-convergence
Tilt-dy
ontrast
Brightness
V-size
V-position
H-size
H-position
Pin-cushion
Uniform-V-TB
Uniform-H ENT
Uniform-H-RL
Landing-TL
Landing-TR
Landing-BL
Landing-BR
- 2 -
RS connector
CRT
CRT face
PWB-MAIN
ADJ.MODE E2PROM
S1
PWB-RS
Short-connector
V-linear-S
V-linear-
Auto-da-test1
Auto-da-test2
Auto-da-test3 *
RT heck
DF DP
*Auto-da-test3 helps you to perform H/V-BLANKING and H/V- ONVERGEN E 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 RR è 4. Landing-TL/TR/BL/BR è 5. H/V-blanking

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.
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
Menu * / Adjustment item available
Menu 1
Menu 1, 3, 5
ontrast, Brightness
PROCEDURE
* It shows the number of the standard menu page.
- 3 -
EXTERNAL DEGAUSS
Make sure you disable the Landing-TL/TR/BL/BR and N-S RR settings before performing the external degauss.
Follow the procedure below depending on the adjustment mode you are in.
USER MODE
1) Select Degauss and press the MENU Button so that the Landing-TL/TR/BL/BR and N-S RR will be
disabled.
2) Degauss the entire screen with degausser while the Degauss is activated (approx. 6 seconds).
FACTORY MODE
1) Select RT heck and press the MENU Button so that the Landing-TL/TR/BL/BR and N-S RR will
be disabled.
2) onfirm 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.
PROCEDURE
n
o
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- 4 -
Note: S REEN VR should not be turned after the adjustment above.
1-2. ANODE VOLTAGE adjustm nt [PWB-MAIN]
1-3. SCREEN VOLTAGE adjustm nt [PWB-MAIN]
1)
2)
3)
Receive a cross-hatch inverted signal of MODE 5 when applying the A
voltage of 110±10V.
onnect the D voltmeter between ONNE TOR TP and GND (chassis).
Adjust the voltage to D 80±0.5V with VR930 (+B ADJ).
1-1. 80V-ADJ adjustm nt [PWB-MAIN]
1)
2)
3)
4)
Receive a cross-hatch inverted signal of MODE 5.
Turn ON the Power Switch.
onnect a high-voltage probe between LEAD- ONNE TOR S on the
PWB-MAIN / ONNE TOR S on the PWB-VIDEO and GND (chassis).
Adjust the screen voltage to 630±10V with S REEN VR located lower of
T501 (FBT).
1)
2)
3)
4)
5)
6)
7)
Receive a cross-hatch inverted signal of MODE 5.
Turn OFF the Power Switch.
onnect a high-voltage probe between RT anode and GND (chassis).
Turn ON the Power Switch.
Adjust the high-voltage to 27.0±0.1kV with VR501 (HV-ADJ).
onfirm the variation of high-voltage is within ±0.2kV when receiving MODE
1 and MODE 6 respectively.
Turn OFF the Power Switch and remove the high-voltage probe.
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.
Voltage
VR930 +B ADJ
Voltage
VR501 HV-ADJ
Voltage
S
C
R
E
E
N
T501(FBT)

- 5 -
1-4. POWER FACTOR CIRCUIT confirmation [PWB-MAIN]
1)
2)
3)
4)
5)
6)
Receive a cross-hatch inverted signal of MODE 5.
Turn OFF the Power Switch.
onnect the D voltmeter between TP4 and TP0.
Turn ON the Power Switch.
onfirm that the voltage is D 400±10V.
Remove the D voltmeter.
1-6. FREE-RUNNING adjustm nt
1)
2)
Receive a cross-hatch inverted signals of fH 27.3kHz and 115.0kHz
respectively.
onfirm that FREE-RUNNING adjustment is automatically performed.
1-7. FH-LIMITER confirmation
1)
2)
3)
4)
5)
6)
7)
Receive a cross-hatch inverted signal of fH 24.8kHz.
onfirm that the picture disappears. Also, make sure the horizontal
oscillation frequency is within the specified range: 55-70kHz.
Receive fH 27.3kHz and confirm that the picture is synchronized.
Receive fH 118.0kHz and confirm that the picture disappears. Also, make
sure the horizontal oscillation frequency is within the specified range above.
Receive fH 115.0kHz and confirm that the picture is synchronized.
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.
Remove the frequency counter.
1-8. H-SIZE LIMIT adjustm nt
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.
n
n
n
1-5. TEMPERATURE SENSOR confirmation
1)
2)
3)
Receive a cross-hatch inverted signal of MODE 5.
Select RT heck and press the MENU Button.
onfirm that respective temperature of fan and monitor front displayed
on the screen is as follows: actual temperature ±5° .
n

|||||···· ····
30 ···········
30
CRT Check
Fan Monitor front
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1-11. V-LIN adjustm nt
1)
2)
3)
4)
Receive a cross-hatch inverted signal of MODE 5.
Adjust the vertical size so that the size is 270±4mm.
Adjust the vertical linear corner (V-linear- ), so that difference between A
and B of the right hand side figure is as follows: | A–B | </= 0.5mm
Adjust the vertical linear side (V-linear-S), so that A, B and are almost
equal.
A
C
B
1-10. V-BLANKING confirmation
Picture Picture
Raster rolling Raster tearing
1)
2)
3)
4)
5)
Receive a cross-hatch inverted signal of MODE 5.
Adjust the vertical size and position (V-size and V-position) of the picture
roughly with the front buttons.
Select Auto-da-test3 and press the MENU Button so that the automatic
confirmation program starts.
onfirm that the back-raster is not rolling or tearing at the top.
onfirm that no retrace line is over the picture.
1-12. H-CENT adjustm nt [PWB-MAIN]
1)
2)
3)
4)
5)
Receive a cross-hatch inverted signal of MODE 5.
Adjust the horizontal size and position of the picture roughly with the front
buttons.
Maximize the brightness so that the back-raster appears on the screen.
Set S501 to the right, center or left so that A and B in the right hand side
figure are almost equal.
Return the brightness to center indication.
- 6 -
1-13. TILT-DY adjustm nt
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
n
n
n
n
Picture
Bezel
AB
Back-raster
Right Left
S501
1-9. H-BLANKING confirmation
1)
2)
3)
4)
5)
Receive a cross-hatch inverted signal of MODE 5.
Minimize the horizontal size (H-size) with the front buttons.
Select Auto-da-test3 and press the MENU Button so that the automatic
confirmation program starts.
onfirm that X of the right hand side figure is as follows: X </= 3.0mm.
Adjust the horizontal size roughly with the front buttons.
n
Picture
Raster rolling
x

- 7 -
1-14. PICTURE SIZE, POSITION AND DISTORTION adjustm nt (Crit ria)
1)
2)
3)
Receive a cross-hatch inverted signal of MODE 4.
Adjust the picture size and position to the specified setting below.
orrect the side distortion with the front buttons so that X of the right hand
side figure is as follows: | X | </= 0.5mm/30mm when selecting the most
remarkable distortion with the naked eye.
H-size: 360±4mm
V-size: 270±4mm
H-position: | A–B |<4mm
V-position: | –D |<4mm
1-15. PICTURE SIZE, POSITION AND DISTORTION adjustm nt
1)
2)
3)
4)
5)
Receive a cross-hatch inverted signal of fH 31.5kHz.
Adjust the picture size, position and distortion roughly with the front buttons
to the reference settings below.
Note: The picture should be within the bezel.
Receive a cross-hatch inverted signal of all preset modes respectively.
Adjust the picture size and position to the specified setting below.
orrect 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.
H-size: 360±4mm
V-size: 270±4mm
H-position: | A–B |<4mm
V-position: | –D |<4mm
Bezel
AB
C
D
Picture
Pin-cushion
Trapezoid
Side-pin-balance
Parallelogram
Side-pin-corner
ushion-side
Note: No other adjustment items for distortion than the above should be
adjusted.
1-16. RESET confirmation
1)
2)
3)
4)
Receive a cross-hatch inverted signal of MODE 5.
hange the horizontal position (H-Position) roughly with the front buttons.
Perform Reset.
onfirm that the adjustment data above is reset to the factory setting.
n
n
H-size: 360±10mm
V-size: 270±10mm
H-position: | A–B |<8mm
V-position: | –D |<8mm
o
| X | </= 1.0mm/30mm when selecting the most remarkable
distortion with the naked eye.
30mm
X
Picture
Pin-cushion
Trapezoid
Parallelogram
Cushion-side
Side-pin-balance
Side-pin-corner
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1
0
B. P. S. DIP switch
1-17. Automatic COLOR adjustm nts
WARNING:
- 8 -
Do not change the horizontal and vertical sync signal or the frequency
while the automatic OLOR adjustments are underway.
Color analyzer setting:
Luminance unit switch: cd/m2
B.P.S. DIP switch: 9600 (1000)
Turn ON the color analyzer switch and press 0- AL switch before use.
1)
2)
3)
4)
5)
6)
7)
Be sure to enter the Factory Mode by using the short-connector.
onnect the interface adapter from RS-232 of the color analyzer to the
PWB-RS of the short-connector.
Select BN for the signal input and receive a white window signal of MODE 4.
Turn OFF the R, G and B outputs on the signal generator.
Apply a color analyzer probe to the center of the screen.
Turn ON the Remote Switch of the color analyzer so that “G” will appear
on the screen to inform that automatic UT-OFF adjustment starts.
Turn ON the R, G and B outputs on the signal generator when “GBRIN”
appears on the screen so that the OLOR TEMPERATURE and
ONTRAST LIMIT adjustments start automatically.
< OLOR TEMPERATURE>
The X and Y specified readings of the color analyzer are as follows:
< ONTRAST>
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).
“END” appears on the screen to inform that the adjustments are completed.
Turn OFF the Remote Switch of the color analyzer.
T 1 (9300K)
X: 0.283±0.006
Y: 0.297±0.006
T 2 (6500K)
X: 0.313±0.006
Y: 0.329±0.006
l
l
l
cd/m²fL
Luminance unit switch
Note: The adjustments above can be repeated by turning OFF and ON the
Power Switch.
n
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.
1-18. GRAY SCALE confirmationn
T 3 (5000K)
X: 0.345±0.006
Y: 0.352±0.006
8)
9)
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1-23. H-CONVERGENCE confirmation
1)
2)
3)
Receive a cross-hatch inverted signal of MODE 5.
Select Auto-da-test3 and press the MENU Button so that the automatic
confirmation program starts.
onfirm that the horizontal line is diverged.
n
- 9 -
1-19. BRIGHTNESS adjustm nt [PWB-MAIN]
1)
2)
3)
Receive an entire white raster signal of MODE 4.
Apply a photometer to the screen center.
Adjust VR502 (ABL-ADJ) so that photometer reads 105±5cd/m2.
1-20. SYNC SIGNAL INPUT confirmation
1)
2)
3)
Receive a cross-hatch inverted signal of fH 47.6kHz.
Select composite and sync on green signal inputs respectively by the
signal generator.
onfirm that the picture is displayed normally.
1-21. SIGNAL SELECT confirmation
1)
2)
3)
Receive a cross-hatch inverted signal of MODE 5.
Switch the signal input to BN and D-SUB respectively.
onfirm that the picture is displayed normally.
n
n
Brightness
VR502 ABL-ADJ
1-22. POWER MANAGEMENT confirmation
1)
2)
3)
4)
5)
6)
7)
8)
9)
Turn OFF the Power Switch and connect a digital wattage meter.
Turn ON the Power Switch.
Receive a cross-hatch inverted signal of MODE 5.
Turn OFF the R, G and B outputs on the signal generator.
Disconnect the H/HV and V cables.
onfirm that the input wattage is 5W or less and the Power Indicator turns
to orange.
onnect the H/HV and V cables and confirm that the picture appears.
Turn OFF the Power Switch and remove the digital wattage meter.
Turn ON the Power Switch.
o
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- 10 -
LMR
Fig.1
T Thin
M Thick
B Thin
Fig.2
Thin
Thick
Fig.3
Thick
LMR
1-26. FOCUS [PWB-MAIN]
1)
2)
3)
4)
5)
6)
7)
8)
9)
10)
Receive a green cross-hatch signal of MODE 5.
Adjust FO US-A VR of T501 (FBT) to make the vertical lines sharpest at
points L, M and R as shown in Fig 1.
Adjust FO US-B VR of the T501 to make the horizontal center line
sharpest at points L, M and R as shown in Fig. 1.
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 FO US-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.)
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 FO US-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.)
Repeat 2) to 5) until the focus is optimum.
onfirm no focus variation on the entire screen.
heck the focus with red and blue respectively.
Receive a H-character signal and repeat 7).
Repeat the FO US adjustments until the focus with red, green and blue
is optimum.
1-25. RASTER REGULATION (DYNAMIC) confirmation
1)
2)
3)
4)
5)
Receive an entire white signal of MODE 5.
Set the input signal by the signal generator as follows:
V-DISP-TIME: 150 V-POSI-TIME: 450
Maximize the brightness or set the signal level to 0.9Vp-p by the signal
generator.
onfirm 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.
Return the brightness to center indication.
n
n
FOCUS-A
FOCUS-B
SCREEN
T501(FBT)
Back-raster
Picture
W
Focus
VR503 V-DBF
1-24. V-CONVERGENCE confirmation
1)
2)
3)
Receive a cross-hatch inverted signal of MODE 5.
Select Auto-da-test3 and press the MENU Button so that the automatic
confirmation program starts.
onfirm that the vertical line is diverged.
n

1-27. LUMINANCE DIFFERENCE adjustm nt
1)
2)
3)
4)
Receive an entire white signal of MODE 5.
Apply a photometer to (center), T (top), B (bottom), L (left) and R (right)
in the right hand side figure.
onfirm that the luminance difference between and T, and B, and L,
and R is within ±10cd/m2 respectively.
If the luminance difference is not within the specified range above, perform
the following adjustments:
<Point T or B>
1. Adjust Uniform-V ENT first to increase the brightness of T and B.
2. Adjust Uniform-V-TB so that the luminance difference between and
T or and B is within ±10cd/m2.
<Point R or L>
1. Adjust Uniform-H ENT first to increase the brightness of point L and R.
2. Adjust Uniform-H-RL so that the luminance difference between and
L or and R is within ±10cd/m2.
1-28. LUMINANCE DIFFERENCE confirmation
1)
2)
3)
Receive an entire white signal of MODE 5.
Apply a photometer to the two points where the luminance difference is
remarkable with the naked eye.
onfirm that the luminance difference is 22.5cd/m2 or less.
C
TL TR
BRBL B
T
R
L
- 11 -
C
B
T
R
L
n
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1-29-1. VLF adjustm nt [PWB-MAIN]
Note: The VLF adjustment requires the precise measuring conditions. Make
sure the adjustment is carried out in the following environment.
2.
1.
3.
4.
All metal parts should be attached to the monitor.
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
a distance of 29.5±0.5cm so that the RT face will be parallel to the
electric field meter.
No other monitors should be placed in the area with a radius of 1.5m
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.
The VLF level of background should be 0.3V/m or less when the
monitor power cable is disconnected.
Monitor
1.5m
29.5+0.5cm
Electric field meter
20cm
1.0m
Monitor
1-29. TCO r quir m nt
- 12 -
5.
Receive a H-character inverted signal of MODE 6.
Adjust the contrast so that the brightness at screen center is 60±5cd/m2.
Set the brightness to center indication.
Turn VR5T2 (VLF-2) fully counterclockwise.
Adjust VR5T1 (VLF-1) so that the electric field meter reads the VLF level
0.95V/m or less.
In case that the VLF level is not within the specified range above, adjust
VR5T2.
In case that the VLF level is still not within the specified range above, turn
VR5T2 fully clockwise and adjust VR5T1.
In case that the VLF level is still not within the specified range above,
adjust VR5T2.
1)
2)
3)
4)
5)
6)
7)
8)
VLF level
VR5T1 VLF-1
VR5T2 VLF-2
6.

1-30. ITC (Int grat d Tub Compon nt) adjustm nts
The following IT 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 IT 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 hapter 5 concerning parts list for the IT adjustments.
* PURITY MAGNET should not be turned during the IT adjustments.
- 13 -
n
1-30-1. LANDING corr ction
1)
Degauss the entire screen with degausser. è See "EXTERNAL DEGAUSS".
Select DEGAUSS and press the MENU Button.
Receive an entire green signal.
Adjust the horizontal size to make it full-scan.
Apply the landing meter to TL (top-left), TR (top-right), BL (bottom-left) and
BR (bottom-right) in the right hand side figure.
onfirm that "H" reading of the landing meter is within ±20% at each point.
Adjust N-S RR with the front buttons so that the "H" reading difference
between T (top) and B (bottom) in the right hand side figure is as follows:
| T-B | = ±3%.
Adjust Landing-TL, TR, BL and BR respectively with the front buttons so
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%
Landing meter setting:
Mode Select Switch: Monitor Normal
Note: Mode Select Switch should be set before turning on the power switch of the landing meter.
Volt: 2V
Time: 50ms
Gain: 7
Unit: % for LND-070, 0.8µm (1%=0.8µm) for LND-072
l
l
l
l
l
TL TR
BR
BL B
T
20mm
20mm
Y HC
Y V
CRT face
Y H
Y VS
X V
PURITY MAGNET*
4-POLE MAGNET
6-POLE MAGNET
BOW MAGNET
DEFLECTION
YOKE
SEPARATOR
DIFFERENTIAL
COIL
XV
LOCKING RING
< Top view > < Side view >
2)
3)
4)
5)
6)
7)
8)
9)
Face the RT screen to east and set it vertically.
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- 14 -
Receive a red and blue cross-hatch signal.
Adjust the 4-POLE MAGNET so that red and blue beams converge on the
center cross lines.
Add green to the red and blue cross-hatch signal.
Adjust the 6-POLE MAGNET so that red and blue beams converge with
green beam on the center cross lines.
Repeat the adjustment until red, blue and green beams converge each
other.
Fix the 4-POLE MAGNET and the 6-POLE MAGNET by turning the
LO KING RING.
Mark the 4-POLE MAGNET and the 6-POLE MAGNET with paint marker
(090Z029A01) so that adjusted position is understandable.
1-30-3. STATIC CONVERGENCE adjustm nt
1)
2)
3)
4)
5)
6)
7)
R
B
R
B
G
R,B
G
R,B
R,G,B
R,G,B
1-30-4. BOW MAGNET adjustm nt
1)
2)
3)
4)
Receive a red and blue cross-hatch signal.
Adjust the BOW MAGNET so as to straighten an arched horizontal line.
Note: Must be careful not to misconverge vertical lines by this adjustment.
Perform the 1-30-3. STATI ONVERGEN E adjustment so as to converge
the red and blue lines.
Fix the BOW MAGNET with paint (090Z020A01).
R
B
R
B
1-30-5. DIFFERENTIAL COIL adjustm nt (XV adjustm nt)
1)
2)
Receive a red and blue cross-hatch signal.
Adjust the DIFFERENTIAL OIL so that the horizontal cross line converge
each other.
R
B
R,B
1)
2)
Receive a cross-hatch inverted signal.
Adjust the specified Yvs volume so that the picture distortion is corrected.
1-30-2. Yvs adjustm nt
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.
Picture
Bezel
Picture
Picture

R
B
R,B
BR
1-30-8. SCREEN-CORNER MISCONVERGENCE corr ction R
B
R
B
R
B
RB
Receive a red and blue cross-hatch signal.
Affix a *ferrite sheet (890Z003A02/890Z003A03) between SEPARATOR
and RT corresponding to the partially misconverged areas.
Note: Must be careful not to affect distortion by this correction.
Fix the ferrite sheet with A ETATE-TAPE (890P306A10).
1)
2)
3)
(890Z003A02)
70
10
10
100
Ferrite
(890Z003A03)
*Ferrite sheet
(in mm)
- 15 -
1)
2)
Receive a red and blue cross-hatch signal.
Adjust the specified YV volume so that red and blue beams converge
each other at the upper and lower edges of the horizontal line.
1-30-6. YV adjustm nt
R
B
R
B
R,B
R,B
1-30-7. YH adjustm nt
1)
2)
Receive a red and blue cross-hatch signal.
Adjust the specified YH volumes so that vertical cross lines converge
each.
YHYHC
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PQRS
OV-parameters
O: Total period
P: Sync.width
Q: Back porch
R: Active video
S: Front porch
Video
Sync
BCDE
AH-parameters
A: Total period
B: Sync.width
C: Back porch
D: Active video
E: Front porch
2. TIMING CHART
- 16 -
Mode
1
2
3
4
5
6
R
15.253
11.093
11.179
11.183
11.235
11.294
S
0.318
0.023
0.019
0.015
0.011
0.009
Vertical (msec)
@ 60 z
@ 85 z
@ 85 z
@ 85 z
@ 85 z
@ 85 z
640×480
640×480
800×600
1024×768
1280×1024
1600×1200
f
(k z)
31.469
43.269
53.674
68.677
91.146
106.250
fV
( z)
59.940
85.008
85.061
84.997
85.024
85.000
Sync polarity
N
N
P
P
P
P
V
N
N
P
P
P
P
Q
1.048
0.578
0.503
0.524
0.483
0.433
P
0.064
0.069
0.056
0.044
0.033
0.028
O
16.683
11.764
11.756
11.765
11.761
11.765
E
0.636
1.556
0.569
0.508
0.406
0.279
D
25.422
17.778
14.222
10.836
8.127
6.972
C
1.907
2.222
2.702
2.201
1.422
1.325
orizontal (µsec)
B
3.813
1.556
1.138
1.016
1.016
0.837
A
31.778
23.111
18.631
14.561
10.971
9.412
Comp
–
–
–
–
–
–
Sync
on
green
–
–
–
–
–
–
VESA Timing Name

3. IC APPLICATION
Sub microprocessor circuit
Deflection circuit
Ref No. Description Application
IC350 UPC1884CT
&V synchronous signal processor
with geometrical compensation, &V
oscillator
IC401 LA7840L Vertical output
IC502 SLA5041 FET array
IC503 324
Amplifier ( -size, Distortion
control)
Ref No. Description Application
IC701 741Z611-10 Sub microprocessor
IC703 M62393P D/A converter
igh voltage control
IC501
IC102
MSPAD104
Video circuit
IC101 M52755SP
24LC21
igh voltage circuit
DDC
Signal switch
Power circuit
IC205 7805 5V regulator
IC304 7805 5V regulator
IC206 PQ6RD083 6.3V regulator (to CRT heater voltage)
IC351 7812 12V regulator
IC702 7812
IC709 7805 5V regulator
IC930 3842 Main power control
IC931 MIP0223SY Sub power control
IC932 MC34262/
MC33262
Power factor control
Note: Specifications of Main microprocessor and Sub microprocessor are on next page.
IC707
IC705
LA6510/
TA8410AK
LA6510/
TA8410AK
IC706 LA6510/
TA8410AK
IC704 LA6510/
TA8410AK
Power amplifier
(TR+/–, BR+/–)
Power amplifier
( -CONV+/–, V-CONV+/–)
Power amplifier
(TL+/–, BL+/–)
Power amplifier
(TILT+/–, NS+/–)
CRT circuit
LM2403T Video output
M52742ASP Video amplifier
IC201
IC202
12V regulator
IC960 7812 12V regulator
IC961 3842 Variable B control
IC962 UPC1093J/
KIA431
Over voltage, Arc and X-ray pro-
tect
control
Microprocessor circuit
IC211 M62393P D/A converter
IC301 741Z610-10 Main microprocessor
IC302 M51951BSL Power voltage watcher
IC303 24C08 E2PROM
M35045 On screen display control
IC203
M52759SP Uniformity control
IC207
324 Amplifier (Cut-off control)
IC210
IC708 TMC3000NF Terrestrial magnetic sensor
- 17 -
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