Sanyo PLC-SU20B Service Manual

Multimedia Projector

SERVICE MANUAL

PRODUCT CODE

(PA6A) PLC-SU20E: 1 122 068 00

(PA6C) PLC-SU20B: 1 122 068 02

Original Ver sion

REFERENCE NO.SM5110048

FILE NO.

Model No. PLC-SU20E

(Europe, Asia, Africa,

M.E.)

PLC-SU20B

(U.K.)

Give complete “Service Ref. No.” for parts

order or servicing, it is shown on the rating

sheet on the projector.

Service Ref. No.: PLC-SU20E-00

PLC-SU20B-00

■ Contents

■ Safety instructions ________________________________________________3

■ Specifications __________________________________________________ 4

■ Adjustments after parts replacement ________________________________ 5

■ Circuit protections ______________________________________________ 6-7

Fuse ______________________________________________________ 6

Thermal switch ______________________________________________ 7

Warning temperature and power failure protection____________________ 7

■ Mechanical disassemblies ______________________________________ 8-13

■ Optical parts disassemblies ____________________________________ 14-18

■ LCD panel replacement __________________________________________ 19

■ Lamp replacement____________________________________________ 20-22

■ Optical adjustments __________________________________________ 23-25

● Convergence adjustment ____________________________________ 23

● Contrast adjustment ________________________________________ 24

● Integrator lens adjustment __________________________________ 25

■ Electric adjustments __________________________________________ 26-35

● Service adjustment menu operation____________________________ 26

● Circuit adjustments ______________________________________ 27-32

● Service adjustment data table______________________________ 33-34

● Test points and locations ____________________________________ 35

■ Troubleshooting ______________________________________________ 36-40

● No power______________________________________________ 36-38

● No picture ________________________________________________ 39

● No sound ________________________________________________ 40

■ Control port functions ________________________________________ 41-42

■ Waveforms__________________________________________________ 43-45

■ Cleaning ______________________________________________________ 46

■ IC block diagrams ____________________________________________ 47-58

■ Pins description of ICs, transistors, diodes____________________________ 59

■ Parts description in schematic diagram ______________________________ 60

■ Service parts lists ____________________________________________ 61-87

● Electrical parts list ______________________________________ 61-81

● Mechanical parts list ____________________________________ 82-87

■ Circuit block diagram ____________________________________________ A1

■ Power supply lines ______________________________________________ A2

■ Schematic diagrams__________________________________________ A3-A9

■ Printed wiring board diagrams ________________________________ A10-A12

WARNING:

The chassis of this projector is isolated (COLD) from AC line by using the converter transformer.Primary side of

the converter and lamp power supply unit circuit is connected to the AC line and it is hot, which hot circuit is iden-

tified with the line ( ) in the schematic diagram. For continued product safety and protection of personnel

injury, servicing should be made with qualified personnel.

The following precautions must be observed.

■ Safety Instructions

SAFETY PRECAUTIONS

1: An isolation transformer should be connected in the

power line between the projector and the AC line

before any service is performed on the projector.

2: Comply with all caution and safety-related notes pro-

vided on the cabinet back, cabinet bottom, inside the

cabinet or on the chassis.

3: When replacing a chassis in the cabinet, always be

certain that all the protective devices are installed

properly, such as, control knobs, adjustment covers

or shields, barriers, etc.

DO NOT OPERATE THIS PROJECTOR WITHOUT

THE PROTECTIVE SHIELD IN POSITION AND

PROPERLY SECURED.

4: Before replacing the cabinet cover, thoroughly

inspect the inside of the cabinet to see that no stray

parts or tools have been left inside.

Before returning any projector to the customer, the

service personnel must be sure it is completely safe to

operate without danger of electric shock.

SERVICE PERSONNEL WARNING

Eye damage may result from directly viewing the light produced by the Lamp used in this equipment. Always turn

off Lamp before opening cover.The Ultraviolet radiation eye protection required during this servicing.

Never turn the power on without the lamp to avoid electric-shock or damage of the devices since the stabilizer

generates high voltages(15kV - 25kV) at its starts.

Since the lamp is very high temperature during units operation replacement of the lamp should be done at least

45 minutes after the power has been turned off, to allow the lamp cool-off.

PRODUCT SAFETY NOTICE

Product safety should be considered when a component replacement is made in any area of the projector.

Components indicated by mark in the parts list and the schematic diagram designate components in which

safety can be of special significance.It is, therefore, particularly recommended that the replacement of there parts

must be made by exactly the same parts.

DO NOT A TTEMPT T O SERVICING THE

REMOTE CONTROL UNIT.

Laser Beam may be leaked out when in disassemble

the Unit. As the Laser Beam used in this Remote con-

trol unit is harmful to the eyes.

LASER RADIATION

DO NOT STARE INTO BEAM

MAX. OUTPUT: 1mW

WAVE LENGTH: 650±20nm

CLASS II LASER PRODUCT

This product is complied with 21 CFR

part 1040.10

CAUTION

LASER RADIATION

DO NOT STARE INTO BEAM

CLASS 2 LASER PRODUCT

LASER-STRAHLING

NICHT IN DEN STRAHL BLICKEN

LASER KLASSE 2

IEC60825-1, Am. 1 1997

MAX OUTPUT ( ) : 1 mW

WAVE LENGTH ( ) : 650±20nm

Projector Type Multi-media Projector

Dimensions (W x H x D) 239mm x 90mm x 323mm

Net Weight 3.9kg

LCD Panel System 0.9” TFT Active Matrix type, 3 panels

Panel Resolution 800 x 600 dots

Number of Pixels 1,440,000 (800 x 600 x 3 panels)

Color System 6 color system (PAL, SECAM, NTSC, NTSC4.43, PAL-M and PAL-N)

Scanning Frequency H-sync. 15 ~ 80kHz, V-sync. 50 ~ 100Hz

Projection Image Size (diagonal) Adjustable from 30” to 300”

Horizontal Resolution 750 TV lines

Projection Lens F1.7 ~ 2.0 lens with f33.2mm ~ 43.1mm Motor zoom and focus

Throw Distance 1.4m ~ 10.8m

Projection Lamp 150watt type

AV Input Jacks RCA Type x 1 (Video, Audio R and L) and DIN 4 pin (S-Video) x 1

Computer Input Jack (VGA) HDB15 Terminal x 1

Control Port Jack DIN 8 pin x 1

Monitor Output Jack (VGA) HDB15 Terminal x 1

Computer Audio Input Jack Mini Jack (stereo)

Audio Output Jack Mini Jack (stereo)

Internal Audio Amp. 1W RMS (monaural)

Built-in Speaker 1 speaker, 40mm x 30mm

Feet Adjustment 0˚ to 10˚

Voltage AC 200 ~ 240V, 50/60Hz

Power Consumption 1.4A (Max. Ampere)

Operating Temperature 5˚C ~ 35˚C

Storage Temperature -10˚C ~ 60˚C

Remote Control Transmitters Wireless Remote Control with Laser Beam (Class II Laser)

Max. Output 1mW/Wave length 650 ±20nm, batteries (2) AA type.

■ Specifications

● The specifications are subject to change without notice.

■ Adjustments after Par ts Replacement

Convergence Adjustment

R-Convergence adjustment ●●

B-Convergence adjustment ●●

Integrator Lens Adjustment ●

Contrast Adjustment

R-Contrast adjustment ●

G-Contrast adjustment ●

B-Contrast adjustment ●

Output voltage adjustment ●

Pedestal adjustment

R-pedestal adjustment ●

G-pedestal adjustment ●

B-pedestal adjustment ●

Offset adjustment

R-offset adjustment ●

G-offset adjustment ●

B-offset adjustment ●

Video gain adjustment-[CG/MCI]

CG-video gain adjustment ●

MCI-video gain adjustment ●

Video gain adjustment-[AV]

R-video gain adjustment ●

G-video gain adjustment ●

B-video gain adjustment ●

Video center adjustment

R-video center adjustment ●●

G-video center adjustment ●●

B-video center adjustment ●●

NRS Adjustment ●●

Gamma off video adjustment

CG-gamma off video adjustment ●●

AV-gamma off video adjustment ●●

CG/MCI/AV-video adjustment-1 ▲▲▲

CG-video adjustment ●●

R-video adjustment ●●

B-video adjustment ●●

CG/MCI/AV-video adjustment-2

CG-video adjustment ●●

MCI-video adjustment ●●

AV-video adjustment ●●

S/H clock adjustment ●●

Common center adjustment

R-common center adjustment ● ●●

G-common center adjustment ●●●

B-common center adjustment ●●●

White balance adjustment

CG-white balance adjustment ❍❍❍ ❍❍❍

MCI-white balance adjustment ❍❍❍ ❍ ❍❍

AV-white balance adjustment ❍❍❍ ❍ ❍❍

Black balance adjustment ❍❍❍ ❍❍❍

White Uniformity Adjustment ❍❍❍ ❍ ❍❍

Disassembly / Replaced Part

LCD Panel

RG B

Integrator

lens

Polarized glass

RGB

Main Comp.Board

ABCD

Optical AdjustmentsElectrical Adjustments

● : Adjustment necessary ❍ : Check necessary ▲ : Specified adjustment necessar y see LCD Panel Replacement

P.F. C

Board

-6-

■ Circuit Protections

This projector is equipped with the following circuit protections to operate in safety. If the abnormality occurs inside

the projector, it will automatically turn off by operating one of the following protection circuits.

Fuse

The fuse is located inside of the projector.When either the LAMP indicator or the READY indicator is not illuminat-

ed, fuse may be opened. Check the fuse as following steps.

It should be used the specified fuse as follows;

How to replace the fuse

1. Remove the cabinet top following to “Mechanical

Disassemblies”.

2. Remove the fuse from fuse holder.

To install the fuse, take reversed step in the above.

Fuse Part No.: 423 022 2102

TYPE T4.0AH 250V FUSE

LITTLE FUSE INC.TYPE 215004

Fuse

Line Filter Board

Thermal switch

There is the thermal switch (SW902) inside of the projector to prevent the internal temperature from rising abnor-

mally. When the inter nal temperature reaches near 100˚C, turn off the AC main power supply automatically.

The thermal switch is not reset to normal automatically even if the internal temperature becomes normal. Reset the

thermal switch following procedure.

Check the resistance between terminals of thermal switch by using the tester. If it has high impedance, thermal

switch may be in operative.

How to reset the thermal switch

1. Remove the cabinet top following to “Mechanical

Disassemblies”.

2. Press the reset button on the thermal switch.

CAUTION:

Before press the reset button, disconnect the AC cord from

the projector.

Thermal switch (SW902)

Reset Button

-7-

Circuit Protections

Warning temperature and power failure protection

The TEMP WARNING indicator flashes red and the projector will automatically turn off when the internal tempera-

ture of the projector exceeds the normal temperature or when stopping cooling fans or when the internal power sup-

ply lines are failed.

Check the following possible causes and wait until stopping the TEMP WARNING indicator flashing.

Possible causes

- Air filter is clogged with dust particles. Remove dust from the air filter by following instructions in the “Air filter care

and cleaning” below.

- Ventilation slots of the projector are blocked. In such an event, reposition the projector so that ventilation slots are

not obstructed.

- Check if projector is used at higher temperature place (Normal operating temperature is 5 to 35 ˚C)

If the TEMP WARNING indicator still continues to flash, there may be defects on cooling fans or power supply cir-

cuits. Please check fan operation and power supply lines referring to the “Power Supply Lines Chart”.

Air filter care and cleaning

The removable air filters prevents dust from accumulation on the surface of the projection lens and projection mirror.

Should be the air filter become clogged with dust particles, it will reduce the cooling fan’s effectiveness and may

result in internal heat build up and reduce the life of the projector.

To clean up the air filters, follow the cleaning procedure

below:

1.Turn the power off, and disconnect the AC po w er cord

from the AC outlet.

2. Tur n the projector up side down and remove 2 air fil-

ters by pulling the latches of them upward.

3. Clean the air filters with brush or wash out the dust

and particles.

4. Replace the air filter.Make sure that the air filters are

fully inserted.

CAUTION:

Do not operate the projector with the air filter removed.

The dust is stuck on the LCD panel and the mirror, and

it may spoil the fine picture image.

Do not put the small parts into the air filter intake vents.

It result in the malfunction of the projector.The air filter

is small parts. Take care that children don’t eat or swal-

low it.

RECOMMENDATION

We recommend to avoid dusty, smoky place for operating the projector. Using in dusty place may cause the picture

of poor quality.

When using under the dusty or smoky conditions, dust may accumulate on the LCD panel and lens inside it, and

may resultantly be projected on the screen together with the picture.

When the above symptoms are noticed, please clean up the LCD panel and lens f ollowing to the “Cleaning Method”.

Air filters

-8-

Remove 4 screws and pull cabinet top upward.

1. CABINET TOP REMOVAL

■ Mechanical Disassemblies

Mechanical disassemble should be made following procedures in numerical order.

Following steps show the basic procedures, therefore unnecessary step may be ignored.

Caution:

The parts and screws should be placed exactly the same position as the original otherwise it may cause loss of

performance and product safety.

Fig.1

1) Remove 3 screws (A) and take the AV SUB Board off upward.

2) Remove a screw (B) and a fixer, then disconnect the FPC cables.

3) Remove 4 screws (C) and pull the Main-B/C Boards off upward.

2. AV SUB, MAIN-B/C BOARD REMOVAL

Fig.2

Fixer

AV SUB Board

Main-B/C Board

1) Remove 4 screws (A) and pull the Viewer and Main-A/D Board Ass’y

upward.

2) Remove 2 screws (B) and disconnect connector K1A, then take the

Viewer Board Ass’y off from the Main-A/D Board Ass’y.

3) Remove 4 screws (C) and take the Viewer Unit off from the Viewer

Mounting Holder.

4) Remove 2 screws (D) and remove the Main-D Board.

5) Remove 4 screws (E) and take the Main-A Board off from the Main-A

Board Holder.

4.VIEWER*, MAIN-A/D BOARD REMOVAL

-9-

Mechanical Disassemblies

1) Remove 4 screws (A) and remove the front cabinet forward.

2) Remove a screw (B) and remove the Viewer LED Board.

* Model without the PC Card slot does not provide the Vierwer Board.

3. FRONT CABINET, VIEWER LED BOARD* REMOVAL

Fig.3

Fig.4

Fig.5

Viewer Board *

Main-D Board

K1A

Main-A Board

Viewer, Main-

A/D Ass’y

Main-A Board

Holder

Viewer Board Holder

Viewer LED

Board *

* Model without the PC Card slot does not

provide the Vierwer Board.

-10-

Mechanical Disassemblies

1) Pull the Rear Cabinet Ass’y upward.

2) Remove a screw (A) and take the

spacer off.

3) Remove 2 screws (B) and remove the

Thermal Switch (SW902).

4) Remove a screw (C) and remove the

grounding lead.

5) Remove 4 screws (D) and remove the

AV Board.

6) Remove 4 screws (E) and remove the

fans (FN904, FN905).

5. AV BOARD, REAR CABINET, FAN (FN904, FN905) REMOVAL

Fig.6

Rear Cabinet

Fan

(FN904, FN905)

Thermal Switch

(SW902)

Spacer

AV Board

1) Remove 4 screws (A) and remove the Power Cover.

2) Remove 2 screws (B) and remove the Fan (FN901).

3) Remove 4 screws (C) and remove the Speaker.

4) Remove a screw (D) and remove R/C Board.

5) Remove 2 screws (E) and remove the grounding

leads.

6) Remove 2 screws (F) and pull the Filter & Interlock

Switch Ass’y.

7) Remove 2 screws (G) and then remove the Filter

Board and the Interlock Switch Ass’y.

Note:

* When fixing the grounding lead of the Filter Board,

disconnect the lamp socket (refer to Fig.8) first, and

fix the grounding lead then connect the lamp socket.

* Dress the grounding lead (e), (f) as show in Fig.7-2.

* Make sure of wires color as shown in Fig.7-2 when

connecting the sockets.

6. POWER COVER, FAN (FN901), FILTER

BOARD REMOVAL

R/C Board

Speaker

(SP901)

Power Cover

Fan(FN901)

Interlock Switch

(SW904)

Filter Board

Blue

Brown

Fig.7-1Fig.7-2

e, f

1) Remove 2 screws (A) and disconnect the lamp socket.

2) Remove 2 screws (B) and pull the Lamp Ballast Ass’y upward.

3) Remove 2 screws (C) and remove the Lamp Ballast Unit from

the Lamp Ballast Holder.

7. LAMP BALLAST UNIT REMOVAL

-11-

Mechanical Disassemblies

Fig.8

Lamp Socket

Lamp Ballast Holder

Lamp Ballast Unit

1) Remove 5 screws and pull the Optical Unit upward.

8. LENS, OPTICAL UNIT REMOVAL

Fig.9

Lens

Optical Unit

-12-

Mechanical Disassemblies

1) Remove screws (A) and pull the Power Board Ass’y upward.

2) Remove 3 screws (B) and take the Power Board off from the Power Board

Holder.

3) Remove the P.F.Board from the Power Board.

9. POWER, P.F. BOARD REMOVAL

Fig.10

Power Board

P.F. Board

1) Remove each 2 screws and take the Fans (FN902, FN903) off.

10. FAN (FN902, FN903) REMOVAL

Fig.11

Fan (FN902)

Fan (FN903)

P.F. Board Holder

-13-

Mechanical Disassemblies

For servicing the A V, A V Sub, Main-A and Main-D Board, it is advisable to set

up the service position for the checking and testing easily following to below

steps

1) Remove the AV, AV Sub and Main-A/D Board following to steps 1~5 of

“Mechanical Disassemblies”.

* Should be remove the Main-A Board Holder and Viewer Holder.

2) Mount the AV, AV Sub, and Main-A/D Board to the Main-B Board.

* Not necessary to connect the Viewer Board.

Note:

In the mounting, make sure of the mounting direction of connectors.

11. SERVICE POSITION

Fig.12

Main-D Board

Main-B Board

AV Board

Main-A Board

AV Sub Board

Make sure to dress the lead wires as follows when assembling the chassis

and cabinets

12. LEAD WIRE DRESSING

Fig.13

AV Sub Board

Do not loosen

these wires

Use a fixer for dress-

ing these wires.

Fix wires firmly after

dressing.

Make sure that the

wires around here

are dressed not to

touch to the fans.

-14-

1) Remove the Optical Unit/Projection Lens following to the step 8 of

“Mechanical Disassemblies”.

2) Remove 4 screws and remove the Projection Lens.

1. PROJECTION LENS REMOVAL

Remove 2 screws (A) and pull the Integrator Lens-IN Ass’y upward.

2. INTEGRATOR LENS-IN ASS’Y REMOVAL

Fig.2

Fig.1

■ Optical Par ts Disassemblies

Remove the Cabinet Top , AV Sub, Main-B/C Board following to the “Mechanical Disassemblies”, before proceed-

ing these disassemblies.

Integrator Lens-IN

Ass’y

Fig.3

-15-

Remove 2 screws (A) and take the Integrator Lens-IN off from the lens

holder.

3. INTEGRATOR LENS-IN ASS’Y DISASSEMBLY

1) Remove each screw (A) and remove the Polarized Glass Holders.

2) Remove 4 screws (B) and take the Optical Unit Top off.

4. OPTICAL UNIT TOP REMOVAL

Lens Holder

Lens Surface

Integrator Lens-IN

Fig.4

Fig.5

Optical Pats Disassemblies

Polarized Glass Holder

-16-

Optical Parts Disassemblies

Remove 2 screws (A) and pull the Integrator Lens-OUT Ass’y downward.

5. INTEGRATOR LENS-OUT ASS’Y REMOVAL

Integrator Lens-OUT

Ass’y

Lens Surface

Fig.7

Fig.6

Remove the Lens Holder and disassembly the Integrator Lens-OUT Ass’y.

6. INTEGRATOR LENS-OUT ASS’Y DISASSEMBLY

Lens Holder

Prism Assy

(Beam Splitter)

Fig.8

Lens Surface

Integrator Lens-OUT

Surface attached the

phase sheet comes to

the lens holder.

-17-

Optical Parts Disassemblies

When the optical parts mounting or assembling, the parts must be mounted

in the specified location and direction. Please refer to the figure below and

“Mounting direction of optical parts” on next page.

1 Prism ass’y

2 Relay lens (IN)

3 Relay lens (OUT)

4 Condenser lens (IN)

5 Condenser lens (OUT)

6 Condenser lens

7 Condenser lens (B)

8 Mirror (W)

9 Mirror (R)

10 Mirror (B)

11 Optical Filter (UV cut)

12 Polarized glass (R-filter)

13 Polarized glass (IN/G)

14 Polarized glass (IN/B)

15 Dichroic mirror (R)

16 Dichroic mirror (G)

No. Part name No. Part name

Parts Name and Locations

Fig.9

Printed marker

comes this side

Printed marker

comes this side

Mount lens to be the same direc-

tion of the arrow marker on both of

the lens and optical base bottom.

-18-

Optical Parts Disassemblies

The optical parts must be mounted in specified direction otherwise the picture image will not reproduce correctly.

● Mounting direction of Lens (Key No. 2, 3, 4, 5, 6, 7)

Lens (Key No. 2) is mounted as shown in Fig.9.

Lens (Key No. 3, 7) have no specified mounting direction.

Lens (Key No. 4, 5, 6,) are mounted as shown in Fig.9.

● Mounting direction of Mirrors (Key No. 8, 9, 10)

Mount the mirrors as the coating surface comes inside.

● Mounting direction of optical filter (Key No. 11)

The optical filter has no specified mounting direction.

● Mounting direction of polarized glasses (Key No. 2, 13, 14)

Mount each polarized glass as the face that the polarized film is attached comes the prism ass’y.

● Mounting direction of dichroic mirror (Key No. 15,16)

dichroic mirrors are mounted as shown in Fig.9.

Mounting direction of optical parts

-19-

■ LCD Panel Replacement

● LCD PANEL REMOVAL

1. Remove the cabinet top following to “Mechanical Disassemblies”.

2. Remove 3 screws (A) by using 2.0mm hex driver, and then pull the prism/panel ass’y out from the optical base.

3. Remove 4 screws (B) to take off the LCD panel from the prism/panel ass’y.

Caution: Do not remove 3 panels (R,G,B) at the same time as it is necessary the standard panel for adjustment.

Do not fasten the screws with excessive force when mounting the LCD panel, otherwise focus adjust-

ment may be shifted.

Prism Ass’y

B-LCD Panel

G-LCD

Panel

R-LCD

Panel

SEAL

PART NO.

LOT NO.

Prism Ass’y

P09SG210

1-A-1234A9

IMPORTANT NOTICE on LCD Panel Replacement

There are 2 types (Type A, Type B listed on next page) of LCD panels which they have a different character istics

used for this model. As the only Type B LCD panels are supplied for the service spare parts, take care the follow-

ing notice when the LCD panel replacement.

1.When replacing the LCD panel, confirm the indication of the LCD panel, then replace the correct LCD panel.

Select either combination (1) or (2) listed on next page when in combine the R, G and B LCD panel, please

see the explanation “COMBINATION OF LCD PANELS”.

2. After replacing LCD panel, the specified adjustment [Video Adjustment] should be performed for obtaining bet-

ter performance, please see the explanation “REPLACED LCD PANEL ADJUSTMENT”. And also required to

adjustment the convergence and common center adjustments, and white uniformity adjustment if required.

(Refer to the Optical and Electrical adjustments.)

-20-

COMBINATION-(1)

COMBINATION-(2)

Type A * Type B

SEAL PART NO. PART NO. SERVICE PART NO.

R-LCD PANEL RED SEAL P09SG210 P09SG210B 645 041 3964

G-LCD PANEL NO SEAL P09SG220 P09SG220B 645 041 3957

B-LCD PANEL BLUE SEAL P09SG210 P09SG210B 645 041 3971

● COMBINATION OF LCD PANELS

When replacing the LCD panel, confirm the indication of the LCD panel, then replace the correct LCD panel.

Select either combination (1) or (2) when in combine the R, G and B LCD panel.

There is no combination to be used except them.

As the only Type B LCD panels are supplied for the service spare parts, the service par ts for the Type A LCD pan-

els are not available. Please order the Type B LCD panels for replacement.

For example, if you intend to replace the R-LCD panel which is indicated part no.“P09SG220” with red seal, the

combination of LCD panels for this projector is employed COMBINATION-(1). So the service parts for R-LCD panel

should be PART NO.“P09SG220B” / SERVICE PART NO. “645 041 3995”.

Type A * Type B

SEAL PART NO. PART NO. SERVICE PART NO.

R-LCD PANEL RED SEAL P09SG220 P09SG220B 645 041 3995

G-LCD PANEL NO SEAL P09SG210 P09SG210B 645 041 3988

B-LCD PANEL BLUE SEAL P09SG220 P09SG220B 645 041 4008

SEAL

PART NO.

LOT NO.

P09SG210

1-A-1234A9

TYPE NO.

A :Type A

B :Type B

* These are not supplied as a service parts.

-21-

● REPLACED LCD PANEL ADJUSTMENTS

After replacing LCD panels, [Video Adjustment] should be carried out for obtaining better performance.This only

required when replacing the LCD panel from “Type A” to “Type B”.

● In case of Green LCD panel replaced

1. Enter to the ser vice mode and select COMPUTER

mode.

2. Select item no. “13” and decrease the data value 6

steps from the current value.

3. Select item no. “14” and decrease the data value 6

steps from the current value.

4. Select VIDEO mode and perform the above same

adjustment.

● In case of Red LCD panel replaced

1. Enter to the ser vice mode and select COMPUTER

mode.

2. Select item no. “13” and increase the data value 6

steps from the current value.

3. Select VIDEO mode and perform the above same

adjustment.

● In case of Blue LCD panel replaced

1. Enter to the ser vice mode and select COMPUTER

mode.

2. Select item no. “14” and increase the data value 6

steps from the current value.

3. Select VIDEO mode and perform the above same

adjustment.

● In case of Red and Blue LCD panels replaced

1. Enter to the ser vice mode and select COMPUTER

mode.

2. Select item no. “13” and increase the data value 6

steps from the current value.

3. Select item no. “14” and increase the data value 6

steps from the current value.

4. Select VIDEO mode and perform the above same

adjustment.

● In case of Red and Green LCD panels replaced

1. Enter to the ser vice mode and select COMPUTER

mode.

2. Select item no. “14” and decrease the data value 6

steps from the current value.

3. Select VIDEO mode and perform the above same

adjustment.

After performing the adjustment, please confirm the

white balance in COMPUTER, VIDEO and MCI mode.

If required the readjustment, please follow the [WHITE

BALANCE ADJUSTMENT] on page 31.

● In case of Blue and Green LCD panels replaced

1. Enter to the ser vice mode and select COMPUTER

mode.

2. Select item no. “13” and decrease the data value 6

steps from the current value.

3. Select VIDEO mode and perform the above same

adjustment.

Please change the data value of service data for referring to the following adjustment.This should be performed

when replacing the LCD panel.

(To enter the ser vice mode, refer to “Service Adjustment Menu Operation” on page 26.)

VIDEO ADJUSTMENT

-22-

■ Lamp Replacement

WARNING:

- For continued safety, replace with a lamp assembly of the same type.

- Allow the projector to cool for at least 45 minutes before you open the lamp cover. The inside of the projector can

become very hot.

- Do not drop the lamp module or touch the glass bulb! The glass can shat-

ter and cause injury.

Procedure

1.Turn off the projector and disconnect the AC cord,.Allow the projector to

cool for at lease 45 minutes.

2. Remove a screw with a screwdriver and remove the lamp cover.

3. Remove 2 screws and pull out the lamp assembly by grasping the han-

dle.

4. Replace the lamp assembly securely and tighten 2 screws.

5. Place the lamp cover and tighten a screw.

6. Connect the AC cord to the projector and turn on.

Note:

- Do not reset the LAMP REPLACEMENT MONITOR TIMER, except after

the lamp is replaced.

- The projector can not be turned-on with the lamp cover removed,

because when the lamp cover is removed, the interlock switch is also

released to switch off the mains power for safety.

7. Reset the lamp replacement monitor timer,see below explanation.

Service Parts No.: 610 280 6939

Description: Lamp Assy (POA-LMP21J)

How to reset the lamp replacement moni-

tor timer

1.Turn the projector on. Press the MENU button on the

projector and the On-Screen menu will appear.Select

setting menu and select “Lamp age” on the setting

menu of menu bar.

2.“Lamp replace monitor Reset?” is displa y ed for confir-

mation.Select “Yes” to reset the lamp replace timer.

Please refer to the owners manual for further informa-

tion.

Recommendation

Should the air filter become clogged with dust particles,

it will reduce the cooling fan’s effectiveness and may

result in internal heat build up and short lamp life. We

recommend cleaning the air filter after the projection

lamp is replaced.

Refer to “Air Filter Cleaning”.

How to check the lamp replace monitor

time

The LAMP REPLACEMENT indicator will illuminate

when the accumulated illumination time of the lamp

reaches 1000 hours.This is to indicate that lamp

replacement is necessary.

You can check the accumulated illumination time of

the lamp by following procedure.

1. Press and hold the pointer ▲ on the projector for

more than 20 seconds.

2.The projector enters to the service mode and the

accumulated time is displayed in the Data column

with hours unit. For example, when “123” is dis-

played, the accumulated illumination time of the

lamp is 123 hours.This will disappear in 5 seconds.

Lamp cover

Lamp Assembly

Handle

Video

Item Data

Service Mode

123

Accumulated illumi-

nation time of lamp

-23-

[Before adjustment]

- Make sure each Red, Green and Blue LCD panel unit has been correctly installed.

- Input a grid pattern signal.

- Adjustment requires a 2.0mm hex wrench. Remove cabinet top following to the “Mechanical Disassemblies”.

1.Insert paper etc. in Red or Blue panel to block the red

or blue light so that either green and red or green and

blue lights are projected. (For example, when adjust

Red panel convergence, project green and red lights,

and when adjust Blue panel, project green and blue

lights.)

2. Loosen 2 screws “D” (Fig.1) using the 2.0mm hex

wrench.

3.Turning the screw “A”, align so that the Red (or Blue)

horizontal lines are parallel to the Green horizontal

lines (Fig.1-a).

4. Turning screw “B”, align the Red (or Blue) vertical

lines onto the Green vertical lines (Fig.1-b).

5. Turning screw “C”, align the Red (or Blue) horizontal

lines onto the Green horizontal lines (Fig.1-b).

6. By repeating steps 3 to 5, align the Red (or Blue) grid

lines onto the green lines.

7.Tighten the 2 screws “D”to fix the Red (or Blue) panel

unit.

RED/BLUE PANEL CONVERGENCE

1. Adjustment screw “A” tur ns the image (Fig.1-a).

2. Adjustment screw “B” moves the image right and left

(Fig.1-b).

3. Adjustment screw ”C” moves the image up and down

(Fig.1-b).

[Image Movement and Screw Turning]

C: up/down

B: right/left

A: angle

D: Fixing

Fig.1-a

Red or Blue

Green

Fig.1-b

Red or Blue

Green

Red LCD panel

Blue LCD panel

For convergence adjustment, use Green as the reference standard. Align Red and Blue with Green by adjusting

the position and angle of the Red and Blue LCD panels. Screws “A”, “B”, “C” (Fig.1) are for convergence adjust-

ment.

CONVERGENCE ADJUSTMENT

Fig.1

Fig.2

■ Optical Adjustments

-24-

Optical Adjustments

[Before Adjustment]

- Adjustment requires a 2.0mm hex wrench and a slot screwdriver.

- Remove cabinet cover following to step1 of “Mechanical Disassemblies”.

- Input a 100% of black raster signal.

[R/G/B-CONTRAST ADJUSTMENT]

1. Insert paper etc. in front of the LCD panels to block unnecessary

lights.

When adjusting the R-Contrast, project red light only.

When adjusting the G-Contrast, project green light only.

When adjusting the B-Contrast, project blue light only.

2. Loosen a screw “A” (Fig.3/4) on the polarized glass mounting base

which you intend to adjust.

3. Turn the polarized glass mounting base by using a slot driver as

shown in Fig.3 to obtain the darkest brightness on the screen.

4.Tighten the screw “A”to fix the polarized glass mounting base.

Repeat steps 1 to 4 for remaining polarized glasses.

B-Polarized

glass

R-Polarized

glass

G-Polarized

glass

Fig.4

Fig.3

Polarized

glass

CONTRAST ADJUSTMENT

-25-

Optical Adjustments

[Adjustment]

1.Turn on lamp by a state of without FPC cable of LCD

panels.

2. Inser t a light block sheet in front of the Blue panel to

block the blue light so that red and g reen light are pro-

jected.

3. Adjust the adjustment base of integrator lens-IN and

integrator lens-OUT to make color uniformity in yel-

low.

1) If the un-uniform color appears on the top or bot-

tom of the screen as shown in Fig.5-a, loosen 2

screws “A” (Fig.5-b) with hex driver and insert a

slot screwdriver into slot “B” and turn it to make

color uniformity in yellow.

2) If the un-uniform color appears on the left or right

of the screen as shown in Fig.5-c, loosen 2 screws

“C” (Fig.5-d) with the hex driver and insert a slot

screwdriver into slot “D” and tur n it to make color

uniformity in yellow.

6. Tighten the 2 screws “A” or “C” to fix the integrator

lens-IN and OUT unit.

Slot B

Fig.5-b

Fig.5-a

Fig.5-c

INTEGRATOR LENS ADJUSTMENT

Yellow

Slot D

Fig.5-d

[Before Adjustment]

- Adjustment requires a 2.0mm hex driver and a slot screwdriver.

- Remove the cabinet top following to “Cabinet Disassemblies”.

- Disconnect AV sub board and connectors FPC cable of LCD panels on the main unit.

Yellow

Fig.5

Integrator Lens-IN

Integrator Lens-OUT

-26-

■ Electrical Adjustments

To enter the ser vice mode

To enter the “Service Mode”, press and hold the MENU and NORMAL button on the projector for more than 3 sec-

onds.The ser vice mode display appears on the screen as follows.

To adjust ser vice data

Select the adjustment item no.by pressing the pointer ▲ or ▼ button, and change the data value by pressing the

VOLUME + or VOLUME - button. Refer to the “Ser vice Adjustment Data Table” for further descroption of adjust-

ment item no.and data value.

To exit the service mode

To exit the service mode, press any of the POWER ON-OFF, MENU, MODE, FOCUS or ZOOM buttons on the pro-

jector or remote control unit.

● Service Adjustment Menu Operation

Service Mode

Video

Version : 1.0

Item Data

10 15

Normal mode Service mode

Adjustment

Item No.

Adjustment

Data Value

Item

Data

IC302 on the main board-A stores the data for the ser-

vice adjustments, and should not be replaced except

for the case of defective device.

If replaced, it should be performed the re-adjustments

following to the “Electrical Adjustments”.

The lamp replacement monitor timer is stored in the

IC302, and it can be confirmed at the item no. 36 of

service mode.

Please note that the lamp replacement monitor timer is

reset when the memory IC (IC302) is replaced.

(Lamp replacement monitor time can not be set to the

previous value.)

● Caution to memory IC replacement

When IC302 is replaced with new one, the CPU writes

down the default data of the service adjustments to the

replaced IC, refer to the service adjustment table. As

these data are not the same data as factory shipped

data, it should be required to perform the re-adjust-

ments following to the “Electrical Adjustments”.

Please note that the lamp replacement monitor timer is

reset.

● Caution of Main Board replacement (in the case

IC302 is not defective)

When the main board-A is replaced, IC302 should be

replaced with the one on previous main board. After

replacement, it should be required to perform the re-

adjustments following to the “Electrical Adjustments”.

In this case, the lamp replacement monitor timer and

the white uniformity compensation data can be kept the

value as before.

● Memory IC Replacement

-27-

After replacing the Power Board, PF.C. Board, readjust

the Output voltage adjustment as follows.

1. Connect a digital voltmeter to pins 1 (+) and 3 (-) of

K6C.

2. Adjust the voltage by using VR01 as following.

AC Input Reading

230V 370V ±2V

120V 320V ±2V

Caution:

Be sure to connect the lamp when taking this adjust-

ment.

OUTPUT VOLTAGE ADJUSTMENT

● Circuit Adjustments

CAUTION:The each circuit has been made by the fine adjustment at factory. Do not attempt to adjust the follow-

ing adjustments except requiring the readjustments in servicing otherwise it may cause loss of perfor-

mance and product safety.

[Adjustment Condition]

● Input signal

Video signal ..................1.0Vp-p/75Ω terminated, 16 steps gray scale or color bar pattern

Computer signal............0.7Vp-p/75Ω terminated, 16 steps gray scale pattern

MCI signal * ..................16 steps gray scale pattern from PC Card

● Picture control mode ---------- “NORMAL” mode unless otherwise noted.

Note:

* Please refer to “Service Adjustment Menu Operation” for entering to the service mode and adjusting the service

data.

* It is not available the MCI mode for model which does not provide the PC Card slot.

Electrical Adjustments

Presetting

1. Receive the 16-step grey scale video signal.

2. Set to VIDEO mode.

[R-PEDESTAL ADJUSTMENT]

3. Connect an oscilloscope to test point “TP221R” (+)

and chassis ground (-).

4. Enter to the service mode, select item no. “27” and

change data value to adjust the pedestal level and

black level to be same level.

[G-PEDESTAL ADJUSTMENT]

5. Connect an oscilloscope to test point “TP221G” (+)

and chassis ground (-).

6. Select item no.“28” and change data value to adjust

the pedestal level and black level to be same level.

[B-PEDESTAL ADJUSTMENT]

7. Connect an oscilloscope to test point “TP221B” (+)

and chassis ground (-).

8. Select item no.“29” and change data value to adjust

the pedestal level and black level to be same level.

Pedestal level = Black level

PEDESTAL ADJUSTMENT

-28-

Electrical Adjustments

[CG-VIDEO GAIN ADJUSTMENT]

1. Receive the 16-step grey scale computer signal.

2. Set to COMPUTER mode.

3. Connect an oscilloscope to test point “TP2221G” (+)

and chassis ground (-).

4. Enter to the service mode, select item no. “48” and

change data value to adjust “a”to be 1.15 ±0.01Vp-p.

[MCI-VIDEO GAIN ADJUSTMENT] *

5. Receive the 16-step grey scale MCI signal.

6. Set to MCI mode.

7. Connect an oscilloscope to test point “TP2221G” (+)

and chassis ground (-).

8. Enter to the service mode, select item no. “48” and

change data value to adjust “a”to be 1.15 ±0.01Vp-p.

VIDEO GAIN ADJUSTMENT-[CG/MCI]

1. Receive the 16-step gray scale video signal.

2. Set to COMPUTER mode.

[R-OFFSET ADJUSTMENT]

3. Connect an oscilloscope to test point “TP2211R” (+)

and chassis ground (-).

4. Enter to the service mode, select item no. “45” and

change data value to adjust the pedestal level and

black level to be same level.

[G-OFFSET ADJUSTMENT]

5. Connect an oscilloscope to test point “TP2221G” (+)

and chassis ground (-).

6. Select item no.“46” and change data value to adjust

the pedestal level and black level to be same level.

[B-OFFSET ADJUSTMENT]

7. Connect an oscilloscope to test point “TP2231B” (+)

and chassis ground (-).

8. Select item no.“47” and change data value to adjust

the pedestal level and black level to be same level.

Pedestal level = Black level

OFFSET ADJUSTMENT-[CG]

Pedestal level = Black level

(a)

-29-

Electrical Adjustments

Presetting

1. Receive the 16-step grey scale video signal.

2. Set to VIDEO mode.

[R-VIDEO GAIN ADJUSTMENT]

3. Connect an oscilloscope to test point “TP2211R” (+)

and chassis ground (-).

4. Enter to the service mode, select item no. “49” and

change data value to adjust “a”to be 1.12 ±0.02Vp-p.

[G-VIDEO GAIN ADJUSTMENT]

5. Connect an oscilloscope to test point “TP2221G” (+)

and chassis ground (-).

6. Enter to the service mode, select item no. “50” and

change data value to adjust “a”to be 1.12 ±0.02Vp-p.

[B-VIDEO GAIN ADJUSTMENT]

7. Connect an oscilloscope to test point “TP2231B” (+)

and chassis ground (-).

8. Enter to the service mode, select item no. “51” and

change data value to adjust “a”to be 1.12 ±0.02Vp-p.

Pedestal level = Black level

(a)

VIDEO-GAIN ADJUSTMENT-[AV]

Presetting

1. Receive the 16-step grey scale computer signal.

2. Set to COMPUTER mode.

[R-VIDEO CENTER ADJUSTMENT]

3. Connect a digital voltmeter to test point “TP511” (+)

and chassis ground (-).

4. Adjust voltage to be 7.30 ±0.05V by using VR501.

[G-VIDEO CENTER ADJUSTMENT]

5. Connect a digital voltmeter to test point “TP512” (+)

and chassis ground (-).

6. Adjust voltage to be 7.30 ±0.05V by using VR531.

[B-VIDEO CENTER ADJUSTMENT]

7. Connect a digital voltmeter to test point “TP513” (+)

and chassis ground (-).

8. Adjust voltage to be 7.30 ±0.05V by using VR561.

VIDEO CENTER ADJUSTMENT

1. Receive the 16-step grey scale computer signal.

2. Set to COMPUTER mode.

3. Connect an oscilloscope to test point “TP3571” (+)

and chassis ground (-).

4. Adjust “a” to be 5.0 ±0.1V by using VR3571.

(a)

NRS ADJUSTMENT

[GAMMA OFF ADJUSTMENT-CG]

1. Receive the 16-step gray scale computer signal.

2. Set to COMPUTER mode.

3. Connect an oscilloscope to test point “TP512” (+) and

chassis ground (-).

4. Enter to the service mode, select item no. “0” and

change data value to adjust “a”to be 1.70 ±0.01Vp-p.

[GAMMA OFF ADJUSTMENT-AV]

5. Receive the 16-step gray scale video signal.

6. Set to VIDEO mode.

7. Connect an oscilloscope to test point “TP512” (+) and

chassis ground (-).

8. Enter to the service mode, select item no. “0” and

change data value to adjust “a”to be 1.70 ±0.01Vp-p.

GAMMA OFF VIDEO ADJUSTMENT

(a)

-30-

1. Receive the 16-step gray scale computer signal.

2. Set to COMPUTER mode.

3. Connect an oscilloscope to test point “TP512” (+) and

chassis ground (-).

4. Enter to the service mode, select item no. “3” and

change data value to adjust “a”to be maximum.

(a)

S/H CLOCK ADJUSTMENT

Electrical Adjustments

Presetting

1. Input the 16-step gray scale video signal, MCI signal

and computer signal.

[CG/MCI/AV-VIDEO ADJUSTMENT] *

2. Connect an oscilloscope to test point “TP512” (+) and

chassis ground (-).

3. Enter to the service mode, select item no. “15” and

change data value to adjust “b”to be 1.6Vp-p at each

VIDEO, MCI and COMPUTER mode.

4. Select COMPUTER and MCI mode, select item no.

“12” and change data value to adjust “a” to be 4.05

±0.01Vp-p.

5. Select VIDEO mode, select item no.“12” and change

data value to adjust “a”to be 4.05 ±0.01Vp-p.

[R-VIDEO ADJUSTMENT]

6. Connect an oscilloscope to test point “TP511” (+) and

chassis ground (-).

7. Enter to the service mode and select COMPUTER

mode.

8. Select item no. “13” and change data value to adjust

“a” to be 4.05 ±0.01Vp-p.

9. Select VIDEO mode and item no. “13” and change

data value to adjust “a”to be 4.05 ±0.01Vp-p.

[B-VIDEO ADJUSTMENT]

10. Connect an oscilloscope to test point “TP513” (+)

and chassis ground (-).

11.Enter to the service mode and select COMPUTER

mode.

12. Select item no.“14” and change data value to adjust

“a” to be 4.05 ±0.01Vp-p.

13. Select VIDEO mode and item no. “14” and change

data value to adjust “a”to be 4.05 ±0.01Vp-p.

(a)

(b)

black level

white level

CG/MCI/A V VIDEO ADJUSTMENT -1

[CG-VIDEO ADJUSTMENT-2]

1. Receive the 16-step grey scale computer signal.

2. Set to COMPUTER mode.

3. Connect an oscilloscope to test point “TP512” (+) and

chassis ground (-).

4. Enter to the service mode, select item no. “15” and

change data value to adjust “b”to be 2.20 ±0.01Vp-p.

[MCI-VIDEO ADJUSTMENT-2] *

5. Receive the 16-step grey scale MCI signal.

6. Set to MCI mode.

7. Connect an oscilloscope to test point “TP512” (+) and

chassis ground (-).

8. Enter to the service mode, select item no. “15” and

change data value to adjust “b”to be 2.20 ±0.01Vp-p.

[AV-VIDEO ADJUSTMENT-2]

9. Receive the 16-step grey scale video signal.

10. Set to VIDEO mode.

11. Connect an oscilloscope to test point “TP512” (+)

and chassis ground (-).

12. Enter to the ser vice mode, select item no. “15” and

change data value to adjust “b”to be 2.30 ±0.01Vp-p.

(a)

(b)

black level

white level

CG/MCI/A V VIDEO ADJUSTMENT -2

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