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

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.

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 -

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.

16.108

15.439

12.711

12.696

15.115

10.472

5.781

10.171

1.007

0.771

1.112

3.636

0.420

0.582

0.416

0.455

17.719

16.652

14.268

16.665

16.695

11.108

6.249

10.660

30.39

27.94

25.422

26.96

15.76

6.41

6.38

6.22

0.282

0.368

0.381

0.272

1.076

0.027

0.026

0.009

0.322

0.074

0.064

0.061

0.084

0.027

0.026

0.025

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

3.04

4.41

3.813

2.01

2.00

0.80

0.89

0.87

40.27

36.76

31.778

30.30

21.00

9.09

8.68

8.47

Sync polarity

Resolution*

640×400

608×420

640×400

712×419

1024×720

384×1152

400×666

400×1200

omp

–

Sync

green

–

(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

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

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

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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]

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]

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).

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

T501(FBT)

- 5 -

1-4. POWER FACTOR CIRCUIT confirmation [PWB-MAIN]

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

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

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

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.

1-5. TEMPERATURE SENSOR confirmation

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° .



|||||···· ····

30 ···········

CRT Check

Fan Monitor front

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1-11. V-LIN adjustm nt

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.

1-10. V-BLANKING confirmation

Picture Picture

Raster rolling Raster tearing

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]

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

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.

Picture

Bezel

Back-raster

Right Left

S501

1-9. H-BLANKING confirmation

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.

Picture

Raster rolling

- 7 -

1-14. PICTURE SIZE, POSITION AND DISTORTION adjustm nt (Crit ria)

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

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

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

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.

H-size: 360±10mm

V-size: 270±10mm

H-position: | A–B |<8mm

V-position: | –D |<8mm

| X | </= 1.0mm/30mm when selecting the most remarkable

distortion with the naked eye.

30mm

Picture

Pin-cushion

Trapezoid

Parallelogram

Cushion-side

Side-pin-balance

Side-pin-corner

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