Sanyo PLC-SU20E Manuel utilisateur

Multimedia Projector

SERVICE MANUAL

PRODUCT CODE

(PA6A) PLC-SU20E: 1 122 068 00

(PA6C) PLC-SU20B: 1 122 068 02

Original Version

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 ATTEMPT TO 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 Parts 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 necessary 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 internal 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 power cord

from the AC outlet.

2. Turn 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 following 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

AAAC

R/C Board

Speaker

(SP901)

Power Cover

Fan(FN901)

Interlock Switch

(SW904)

Filter Board

Blue

Brown

Fig.7-1Fig.7-2

e, f

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