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FILE NO.

SERVICE MANUAL

Multimedia Projector

Model No. PLC-SU20E
(Europe, Asia, Africa, M.E.)

PLC-SU20B
(U.K.)

Original Version

Service Ref. No.:

PLC-SU20E-00 PLC-SU20B-00

Give complete "Service Ref. No." for parts order or servicing, it is shown on the rating sheet on the projector.

PRODUCT CODE
(PA6A) (PA6C) PLC-SU20E: PLC-SU20B:

1 122 068 00 1 122 068 02

REFERENCE NO. SM5110048

s Contents

s s s s

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 s Mechanical disassemblies ______________________________________ 8-13 s Optical parts disassemblies ____________________________________ 14-18 s LCD panel replacement __________________________________________ 19 s Lamp replacement ____________________________________________ 20-22 s Optical adjustments __________________________________________ 23-25 q Convergence adjustment ____________________________________ 23 q Contrast adjustment ________________________________________ 24 q Integrator lens adjustment __________________________________ 25 s Electric adjustments __________________________________________ 26-35 q Service adjustment menu operation ____________________________ 26 q Circuit adjustments ______________________________________ 27-32 q Service adjustment data table ______________________________ 33-34 q Test points and locations ____________________________________ 35 s Troubleshooting ______________________________________________ 36-40 q No power ______________________________________________ 36-38 q No picture ________________________________________________ 39 q No sound ________________________________________________ 40 s Control port functions ________________________________________ 41-42 s Waveforms __________________________________________________ 43-45 s Cleaning ______________________________________________________ 46 s IC block diagrams ____________________________________________ 47-58 s Pins description of ICs, transistors, diodes____________________________ 59 s Parts description in schematic diagram ______________________________ 60 s Service parts lists ____________________________________________ 61-87 q Electrical parts list ______________________________________ 61-81 q Mechanical parts list ____________________________________ 82-87

s s s s

Circuit block diagram ____________________________________________ A1 Power supply lines ______________________________________________ A2 Schematic diagrams __________________________________________ A3-A9 Printed wiring board diagrams ________________________________ A10-A12

2

s Safety Instructions
SAFETY PRECAUTIONS
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 identified 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. 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 provided 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.

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.

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.

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 control unit is harmful to the eyes. 3

CAUTION
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

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

s Specifications

Projector Type Dimensions (W x H x D) Net Weight LCD Panel System Panel Resolution Number of Pixels Color System Scanning Frequency Projection Image Size (diagonal) Horizontal Resolution Projection Lens Throw Distance Projection Lamp AV Input Jacks Computer Input Jack Control Port Jack Monitor Output Jack Computer Audio Input Jack Audio Output Jack Internal Audio Amp. Built-in Speaker Feet Adjustment Voltage Power Consumption Operating Temperature Storage Temperature Remote Control Transmitters

Multi-media Projector 239mm x 90mm x 323mm 3.9kg 0.9" TFT Active Matrix type, 3 panels 800 x 600 dots 1,440,000 (800 x 600 x 3 panels) 6 color system (PAL, SECAM, NTSC, NTSC4.43, PAL-M and PAL-N) H-sync. 15 ~ 80kHz, V-sync. 50 ~ 100Hz Adjustable from 30" to 300" 750 TV lines F1.7 ~ 2.0 lens with f33.2mm ~ 43.1mm Motor zoom and focus 1.4m ~ 10.8m 150watt type RCA Type x 1 (Video, Audio R and L) and DIN 4 pin (S-Video) x 1 (VGA) HDB15 Terminal x 1 DIN 8 pin x 1 (VGA) HDB15 Terminal x 1 Mini Jack (stereo) Mini Jack (stereo) 1W RMS (monaural) 1 speaker, 40mm x 30mm 0° to 10° AC 200 ~ 240V, 50/60Hz 1.4A (Max. Ampere) 5°C ~ 35°C -10°C ~ 60°C Wireless Remote Control with Laser Beam (Class II Laser) Max. Output 1mW/Wave length 650 ±20nm, batteries (2) AA type.

q The specifications are subject to change without notice.

4

s Adjustments after Parts Replacement
q : Adjustment necessary r : Check necessary v : Specified adjustment necessary see LCD Panel Replacement Disassembly / Replaced Part
LCD Panel R G B Integrator lens Polarized glass R G B P.F.C Board Main Comp. Board A B C D

Optical Adjustments

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
q q q q q q q q q q q q q q q q q q q q

Electrical Adjustments

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
r r r r r r r r r r r r r r r q q q

q q q q

q q q q

q q

q q

v

v

v
q q q q q q

q q q q

q q q q

q q q

q q q

r r r r r

r r r r r

r r r r r

5

s 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 illuminated, fuse may be opened. Check the fuse as following steps. It should be used the specified fuse as follows; Line Filter Board Fuse

Fuse Part No.: 423 022 2102 TYPE T4.0AH 250V FUSE LITTLE FUSE INC. TYPE 215004 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.

Thermal switch
There is the thermal switch (SW902) inside of the projector to prevent the internal temperature from rising abnormally. 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.

Reset Button

Thermal switch (SW902) -6-

Circuit Protections

Warning temperature and power failure protection
The TEMP WARNING indicator flashes red and the projector will automatically turn off when the internal temperature of the projector exceeds the normal temperature or when stopping cooling fans or when the internal power supply 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 circuits. 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 filters 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.

Air filters

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 swallow 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".

-7-

s 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.

1. CABINET TOP REMOVAL
Remove 4 screws and pull cabinet top upward.

Fig.1 2. AV SUB, MAIN-B/C BOARD REMOVAL
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. C C C A Main-B/C Board A A

Fixer B

Fig.2
AV SUB Board -8-

Mechanical Disassemblies

3. FRONT CABINET, VIEWER LED BOARD* REMOVAL
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.

A

B

Viewer LED Board *

Fig.3
* Model without the PC Card slot does not provide the Vierwer Board.

4. VIEWER*, MAIN-A/D BOARD REMOVAL
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. Viewer Board * C C C Viewer Board Holder D D Main-D Board

A

C K1A E E E E B

Viewer, MainA/D Ass'y B

Main-A Board Holder Main-A Board

Fig.4

Fig.5
-9-

Mechanical Disassemblies

5. AV BOARD, REAR CABINET, FAN (FN904, FN905) REMOVAL
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). B Thermal Switch (SW902) B
d c

Spacer

A E
b

Fan
(FN904, FN905)

E E

D

AV Board
a

Rear Cabinet

c d

ba

C

6. POWER COVER, FAN (FN901), FILTER BOARD REMOVAL
Remove 4 screws (A) and remove the Power Cover. Remove 2 screws (B) and remove the Fan (FN901). Remove 4 screws (C) and remove the Speaker. Remove a screw (D) and remove R/C Board. Remove 2 screws (E) and remove the grounding leads. 6) Remove 2 screws (F) and pull the Filter & Interlock Fan(FN901) Switch Ass'y. 7) Remove 2 screws (G) and then remove the Filter Filter Board Board and the Interlock Switch Ass'y. Note: * When fixing the grounding lead of the Filter Board, G disconnect the lamp socket (refer to Fig.8) first, and fix the grounding lead then connect the lamp socket. F * 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. Interlock Switch (SW904) G B F
e

Fig.6
Speaker (SP901) A A A A C C C D

1) 2) 3) 4) 5)

R/C Board
f

Power Cover B

e, f
Filter Board

Brown E E
f e

Blue

Fig.7-2
-10-

Fig.7-1

Mechanical Disassemblies

7. LAMP BALLAST UNIT REMOVAL
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. B B

Lamp Ballast Holder

C C C Lamp Socket A A C Lamp Ballast Unit

Fig.8

8. LENS, OPTICAL UNIT REMOVAL
1) Remove 5 screws and pull the Optical Unit upward. Lens

Optical Unit

Fig.9
-11-

Mechanical Disassemblies

9. POWER, P.F. BOARD REMOVAL
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. B B B Power Board P.F. Board A A A P.F. Board Holder

Fig.10

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

Fan (FN903) Fan (FN902)

Fig.11
-12-

Mechanical Disassemblies

11. SERVICE POSITION
For servicing the AV, AV 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. Main-B Board

Main-D Board Main-A Board

AV Board

AV Sub Board

Fig.12

12. LEAD WIRE DRESSING
Make sure to dress the lead wires as follows when assembling the chassis and cabinets

Make sure that the wires around here are dressed not to touch to the fans. Use a fixer for dressing these wires.

Do not loosen these wires

AV Sub Board

Fig.13
Fix wires firmly after dressing. -13-

s Optical Parts Disassemblies
Remove the Cabinet Top , AV Sub, Main-B/C Board following to the "Mechanical Disassemblies", before proceeding these disassemblies.

1. PROJECTION LENS REMOVAL
1) Remove the Optical Unit/Projection Lens following to the step 8 of "Mechanical Disassemblies". 2) Remove 4 screws and remove the Projection Lens.

Fig.1

2. INTEGRATOR LENS-IN ASS'Y REMOVAL
Remove 2 screws (A) and pull the Integrator Lens-IN Ass'y upward.

A A

Integrator Lens-IN Ass'y

Fig.2 Fig.3
-14-

Optical Pats Disassemblies

3. INTEGRATOR LENS-IN ASS'Y DISASSEMBLY
Remove 2 screws (A) and take the Integrator Lens-IN off from the lens holder.

Lens Surface Lens Holder

A A Integrator Lens-IN

Fig.4

4. OPTICAL UNIT TOP REMOVAL
1) Remove each screw (A) and remove the Polarized Glass Holders. 2) Remove 4 screws (B) and take the Optical Unit Top off.

A A Polarized Glass Holder A Polarized Glass Holder

B

B B

B

Fig.5

-15-

Optical Parts Disassemblies

5. INTEGRATOR LENS-OUT ASS'Y REMOVAL
Remove 2 screws (A) and pull the Integrator Lens-OUT Ass'y downward.

A A

Fig.6
Integrator Lens-OUT Ass'y Lens Surface

Fig.7

6. INTEGRATOR LENS-OUT ASS'Y DISASSEMBLY
Remove the Lens Holder and disassembly the Integrator Lens-OUT Ass'y.

Lens Holder Prism Assy (Beam Splitter)

Lens Surface

Surface attached the phase sheet comes to the lens holder. Integrator Lens-OUT

Fig.8

-16-

Optical Parts Disassemblies

Parts Name and Locations
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. No. 1 2 3 4 5 6 7 8 9 Part name Prism ass'y Relay lens (IN) Relay lens (OUT) Condenser lens (IN) Condenser lens (OUT) Condenser lens Condenser lens (B) Mirror (W) Mirror (R) No. 10 11 12 13 14 15 16 Part name Mirror (B) Optical Filter (UV cut) Polarized glass (R-filter) Polarized glass (IN/G) Polarized glass (IN/B) Dichroic mirror (R) Dichroic mirror (G)

1 10 9 14 7 3 11 6 16 2
Printed marker comes this side Printed marker comes this side

12 13 6 15

5

10
Mount lens to be the same direction of the arrow marker on both of the lens and optical base bottom.

4

8
Fig.9
-17-

Optical Parts Disassemblies

Mounting direction of optical parts
The optical parts must be mounted in specified direction otherwise the picture image will not reproduce correctly. q 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. q Mounting direction of Mirrors (Key No. 8, 9, 10) Mount the mirrors as the coating surface comes inside. q Mounting direction of optical filter (Key No. 11) The optical filter has no specified mounting direction. q 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. q Mounting direction of dichroic mirror (Key No. 15,16) dichroic mirrors are mounted as shown in Fig.9.

-18-

s LCD Panel Replacement
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 characteristics used for this model. As the only Type B LCD panels are supplied for the service spare parts, take care the following 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 better 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.)

q 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 adjustment may be shifted. A Prism Ass'y B-LCD Panel Prism Ass'y

R-LCD Panel B B G-LCD Panel A

PART NO.

SEAL

P09SG210 1-A-1234A9
LOT NO.

-19-

q 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 parts for the Type A LCD panels 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".

PART NO.

SEAL

P09SG210 1-A-1234A9
TYPE NO. A : Type A B : Type B LOT NO.

COMBINATION-(1)
Type A * SEAL R-LCD PANEL G-LCD PANEL B-LCD PANEL RED SEAL NO SEAL BLUE SEAL PART NO. P09SG220 P09SG210 P09SG220 PART NO. P09SG220B P09SG210B P09SG220B Type B SERVICE PART NO. 645 041 3995 645 041 3988 645 041 4008

COMBINATION-(2)
Type A * SEAL R-LCD PANEL G-LCD PANEL B-LCD PANEL RED SEAL NO SEAL BLUE SEAL PART NO. P09SG210 P09SG220 P09SG210 PART NO. P09SG210B P09SG220B P09SG210B Type B SERVICE PART NO. 645 041 3964 645 041 3957 645 041 3971

* These are not supplied as a service parts.

-20-

q 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".

VIDEO 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 service mode, refer to "Service Adjustment Menu Operation" on page 26.) q In case of Green LCD panel replaced 1. Enter to the service 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. q In case of Blue and Green LCD panels replaced 1. Enter to the service 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.

q In case of Red LCD panel replaced 1. Enter to the service 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.

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.

q In case of Blue LCD panel replaced 1. Enter to the service 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.

q In case of Red and Blue LCD panels replaced 1. Enter to the service 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.

q In case of Red and Green LCD panels replaced 1. Enter to the service 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. -21-

s Lamp Replacement
WARNING: Service Parts No.: 610 280 6939
- For continued safety, replace with a lamp assembly of the same type. Description: Lamp Assy (POA-LMP21J) - 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 shatter 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 handle. 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. 7. Reset the lamp replacement monitor timer, see below explanation. 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.

Lamp cover

Handle

Lamp Assembly

How to reset the lamp replacement monitor 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 displayed for confirmation.Select "Yes" to reset the lamp replace timer.

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".

Please refer to the owners manual for further information.

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.

played, the accumulated illumination time of the lamp is 123 hours. This will disappear in 5 seconds. Accumulated illumination time of lamp

Service Mode
You can check the accumulated illumination time of the lamp by following procedure. 1. Press and hold the pointer v 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-

Video Item 36 Data 123

-22-

s Optical Adjustments
CONVERGENCE ADJUSTMENT
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 adjustment. [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".

RED/BLUE PANEL CONVERGENCE
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.

[Image Movement and Screw Turning]
1. Adjustment screw "A" turns 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).

A

Red or Blue Green

Fig.1-a
B C Green Red or Blue

Fig.1-b
C: up/down A: angle Blue LCD panel B: right/left Red LCD panel

D: Fixing

Fig.1
-23-

Fig.2

Optical Adjustments

CONTRAST ADJUSTMENT
[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.

A

Polarized

glass

Fig.3

B-Polarized glass

R-Polarized glass

A A

G-Polarized glass

A

Fig.4

-24-

Optical Adjustments

INTEGRATOR LENS ADJUSTMENT
[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. [Adjustment] 1. Turn on lamp by a state of without FPC cable of LCD panels. 2. Insert a light block sheet in front of the Blue panel to block the blue light so that red and green light are projected. 3. Adjust the adjustment base of integrator lens-IN and integrator lens-OUT to make color uniformity in yellow. 1) If the un-uniform color appears on the top or bottom 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 turn it to make color uniformity in yellow. 6. Tighten the 2 screws "A" or "C" to fix the integrator lens-IN and OUT unit.

Fig.5-a
Yellow

Fig.5-c
Yellow

Fig.5-b

A

Slot B

A

Fig.5-d

C Slot D C

Integrator Lens-OUT

Integrator Lens-IN

Fig.5
-25-

s Electrical Adjustments
q Service Adjustment Menu Operation
To enter the service mode
To enter the "Service Mode", press and hold the MENU and NORMAL button on the projector for more than 3 seconds. The service mode display appears on the screen as follows.

To adjust service data
Select the adjustment item no. by pressing the pointer v or w button, and change the data value by pressing the VOLUME + or VOLUME - button. Refer to the "Service Adjustment Data Table" for further descroption of adjustment 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 projector or remote control unit.
Normal mode Service mode
Service Mode
Video Item 10 Version : 1.0 Data 15

Item 10

Data 15

Adjustment Item No.

Adjustment Data Value

q Memory IC Replacement
IC302 on the main board-A stores the data for the service 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.) q 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-adjustments following to the "Electrical Adjustments". Please note that the lamp replacement monitor timer is reset.

q 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 readjustments 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.

-26-

Electrical Adjustments

q Circuit Adjustments
CAUTION: The each circuit has been made by the fine adjustment at factory. Do not attempt to adjust the following adjustments except requiring the readjustments in servicing otherwise it may cause loss of performance and product safety. [Adjustment Condition] q Input signal Video signal ..................1.0Vp-p/75 terminated, 16 steps gray scale or color bar pattern Computer signal ............0.7Vp-p/75 terminated, 16 steps gray scale pattern MCI signal * ..................16 steps gray scale pattern from PC Card q 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.

OUTPUT VOLTAGE ADJUSTMENT
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 230V 120V Reading 370V ±2V 320V ±2V

PEDESTAL ADJUSTMENT
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.

Caution: Be sure to connect the lamp when taking this adjustment.

Pedestal level = Black level

-27-

Electrical Adjustments

OFFSET ADJUSTMENT-[CG]
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.

VIDEO GAIN ADJUSTMENT-[CG/MCI]
[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.

(a)

Pedestal level = Black level

Pedestal level = Black level

-28-

Electrical Adjustments

VIDEO-GAIN ADJUSTMENT-[AV]
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.

NRS 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)

GAMMA OFF VIDEO 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.

(a)

Pedestal level = Black level

VIDEO CENTER ADJUSTMENT
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. -29-

(a)

Electrical Adjustments

CG/MCI/AV VIDEO ADJUSTMENT-1
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.

CG/MCI/AV VIDEO ADJUSTMENT-2
[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 service mode, select item no. "15" and change data value to adjust "b" to be 2.30 ±0.01Vp-p.

white level

(b)
white level

(a)
black level

S/H CLOCK ADJUSTMENT
white level

(b)
white level

(a)
black level

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)

-30-

Electrical Adjustments

COMMON CENTER ADJUSTMENT
1. Receive the 16-step gray scale computer signal. 2. Set to COMPUTER mode. [R-COMMON CENTER ADJUSTMENT] 3. Cover the G and B panel to block the light transit. 4. Adjust VR3502 to obtain the minimum flicker on the picture. [G-COMMON CENTER ADJUSTMENT] 5. Cover the R and B panel to block the light transit. 6. Adjust VR3503 to obtain the minimum flicker on the picture. [B-COMMON CENTER ADJUSTMENT] 7. Cover the G and R panel to block the light transit. 8. Adjust VR3504 to obtain the minimum flicker on the picture.

BLACK BALANCE ADJUSTMENT
[AV BLACK BALANCE ADJUSTMENT] 1. Receive the 16-step grey scale video signal. 2. Set to VIDEO mode. 3. Enter to the service mode, select item no. "9" (Red) or "10" (Blue), and change data values respectively to make a proper white balance at darker part of the screen.

WHITE BALANCE ADJUSTMENT
[CG WHITE BALANCE ADJUSTMENT] 1. Receive the 16-step grey scale computer signal. 2. Set to COMPUTER mode. 3. Enter to the service mode, select item no. "16" (Red) or "17" (Blue), and change data values respectively to make a proper white balance. [MCI WHITE BALANCE ADJUSTMENT] * 4. Receive the 16-step grey scale MCI signal. 5. Set to MCI mode. 6. Select item no. "16" (Red) or "17" (Blue), and change data values respectively to make a proper white balance. [AV WHITE BALANCE ADJUSTMENT] 7. Receive the 16-step grey scale video signal. 8. Set to VIDEO mode. 9. Select item no. "16" (Red) or "17" (Blue), and change data values respectively to make a proper white balance. Confirm that the same white balance is obtained in video, MCI and computer mode.

-31-

Electrical Adjustments

WHITE UNIFORMITY ADJUSTMENT
This adjustment should be carried out when existing unbalanced white uniformity on the screen or after replacing the LCD panels. (When replacing the main board-A, the memory IC, IC302 on the main board-A should be replaced with the one on previous board, so that the white uniformity adjustment may not be required because the data of white uniformity adjustment are stored in this memory IC, IC302.) White uniformity compensation adjustment system of this model divided the screen into 13 in vertical direction and 16 in horizontal direction and specified the area by using its co-ordinate, and then adjust the RGB white balance on the specified area, refer to the figure below. Please note that the selected area and dividing lines are not indicated on the screen. Roughly select the area you wish to adjust with vertical and horizontal address number as shown figure below. [Before adjustment] - Set to normal display mode. - Confirm the white uniformity compensation mode on. Enter to the service mode , select item no. "83" and confirm that the data value is "186" (mode On). If the data value is "58"(mode OFF), change value to "186" by pressing the VOLUME + or VOLUME - button. - Initialize the all of compensation data. (This is required when the LCD panel is replaced more than 2 panels.) 1) Enter to the service mode, select item no. "82" and increase the data value from "0" to "10". When the value reaches "10", the data value is automatically return to "0" and the initializing has been completed. The all of compensation data for RGB are to be "32". - Mode : Video or Computer mode - Input Signal : White raster signal - Picture control : Normal level [How to adjust white uniformity] [1] Enter to the service mode. [2] Chose the area you wish to adjust. For example, choosing 3rd area from the top and 10th area from the left. Select Item No. "77" (Vertical area no. selection mode) and select Data No. "2" , and select Item No. "78" (Horizontal area no. selection mode) and select Data No."9" . The area no. starts from "0". [3] Adjust white balance in selected area. Select Item No."79" (Red), "80" (Green) or "81" (Blue), and change data value to adjust white balance. [4] Repeat steps 2 to 3 until obtaining better white uniformity. [5] Exit from the service mode.
0 0 1 1 2 3 4 5 6 7 8

9

10

11

12

13

14

15

Item : <77> Data : <2> Item : <78> Data : <9>

2
3 4 5 6 7 8 9 10 11 12

Service Mode Video Item 77

Data 2

Item 77 78 79 80 81 82 83

Initial Value 0 0 32 32 32 0 186

Range 0 ~ 12 0 ~ 15 0 ~ 63 0 ~ 63 0 ~ 63 0 ~ 10 58 or 186

Description Vertical area no. selection Horizontal area no. selection Red white balance adjustment Green white balance adjustment Blue white balance adjustment Reset of white uniformity comp. data White uniformity comp. On/Off

-32-

Electrical Adjustments

q Service Adjustment Data Table

The initial value is the reference data writing to the memory IC by the CPU ROM when the memory IC replacing. The Adjustment item which is indicated with "T" is required to readjusted in the "Electrical adjustments". Other items should be used in the initial data value.
Range
VIDEO 20 20 *~* *~* 0 ~ 12 0 ~ 63 0 ~ 63 0 ~ 63 0 ~ 63 26 26 26 0 ~ 63 0 ~ 63 0 ~ 63 0 ~ 63 0 ~ 63 0 ~ 63 0 ~ 127 0 ~ 127 0 ~ 127 0 ~ 63 T CG/MCI/AV-VIDEO ADJUSTMENT-1 T R-VIDEO ADJUSTMENT T B-VIDEO ADJUSTMENT T CG/MCI/AV-VIDEO ADJUSTMENT-2 T CG-WHITE BALANCE ADJUSTMENT[RED] T CG-WHITE BALANCE ADJUSTMENT[[BLUE] T BLACK BALANCE ADJUSTMENT[RED] T BLACK BALANCE ADJUSTMENT[BLUE] T GAMMA OFF G-VIDEO ADJUSTMENT This operates together with Gamma R/G/B Amps, so when one of the R, G, B value reaches maximum or minimum value, the up/down operation stops. Display the Test Pattern T S/H CLOCK ADJUSTMENT

No.

Adjustment Item

Initial Value
COMPUTER MCI

Description

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53

RGB AMP (Gamma OFF) RGB AMP (Gamma ON) S&H Display Position of S/H Test Pattern GAMMA DLY CNT GAMMA G BIAS Not Used GAMMA R BIAS Not Used GAMMA B BIAS GAMMA R-B1P GAMMA B-B1P GAMMA G-B1P DAC CLAMP LEVEL(SUB BRIGHT) Gamma Amp R Gamma Amp B DAC RGB BIAS DAC R BIAS DAC B BIAS DAC GAIN(SUB-CONT) S&H B-CK S&H G-CK S&H R-CK S&H B-SH S&H G-SH S&H R-SH S & H HCK PHASE ADJUSTMENT cxa2076 AV Sub-Color Adjustment

T

20 20 3

T

46 13 13 13

T T T T T T T T 50 50 50 55 30

27 27 27 30 20 20 50 50 50 55 8 8 8 7 7 7 5 6 35 150 150 150 150

30 20 20 50 50 50 58

cxa2076 AV RGB Pedestal ADJUSTMENT T cxa2076 AV G Pedestal ADJUSTMENT cxa2076 AV B Pedestal ADJUSTMENT Not Used Not Used Not Used cxa2076 AV Sub Sharpness Sub Tint For NTSC Sub Tint For NTSC4.43 Lamp Monitor Timer Shootout ON/OFF Not Used Fan Operating Period on Power Off Fan Speed Up Logo Display Option GAMMA R_WHP GAMMA G_WHP GAMMA B_WHP PIXEL OFFSET R PIXEL OFFSET G PIXEL OFFSET B DAC D/A GAIN cxa2076 AV RGB GAIN cxa2076 AV G GAIN cxa2076 AV B GAIN PIXEL GAIN R PIXEL GAIN G T T T T T T T 180 57 57 57 T T

0 ~ 63 150 150 0 ~ 255 0 ~ 255

T R-PEDESTAL ADJUSTMENT T G-PEDESTAL ADJUSTMENT T B-PEDESTAL ADJUSTMENT

3 7 7 0 0 3 0 1 57 57 57 38 38 38 195 26 42 42 192 192 180

0 ~ 15 0 ~ 63 0 ~ 63 -- 0~1 0 ~ 255 0~1 0~1 0 ~ 63 0 ~ 63 0 ~ 63 0 ~ 63 0 ~ 63 0 ~ 63 0 ~ 255 0 ~ 63 0 ~ 63 0 ~ 63 0 ~ 255 0 ~ 255 T R-OFFSET ADJUSTMENT-[CG] T G-OFFSET ADJUSTMENT-[CG] T B-OFFSET ADJUSTMENT-[CG] T VIDEO GAIN ADJUSTMENT-[CG/MCI] T R-VIDEO GAIN ADJUSTMENT T G-VIDEO GAIN ADJUSTMENT T B-VIDEO GAIN ADJUSTMENT 0:Logo Display Off 1:Logo Display On Read Only(can not be modified) 1:AV Signal Exist:AV, Not Exit :PC 1:30 second 3:90 second

-33-

Electrical Adjustments
No.
54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73

Adjustment Item
PIXEL GAIN B Not Used Not Used Not Used Not Used Not Used Not Used Not Used Not Used Not Used

Initial Value
192

Range
0 ~ 255

Description

NTSC AV Total-Dots AV Display-Dots AV H Back-Porch AV V Back-Porch AV Normal Disp-Line AV Clamp Not Used Not Used Not Used Not Used 2015 788 177 22 457 100

PAL 2078 788 204 30 537 100 1 ~ 255 Only HDTV 0 ~ 4096

SVGA Initial Value COMPUTER 74 75 76 77 78 79 80 81 82 83 Gamma RB1G Gamma GB1G Gamma BB1G White Uniformity Compensation-V Area White Uniformity Compensation-H Area White Uniformity Compensation-Red White Uniformity Compensation-Green White Uniformity Compensation-Blue White Uniformity Compensation-On/Off T T T T T T 20 20 20 0 0 32 32 32 0 186 MCI VIDEO 24 24 24 0 ~ 12 0 ~ 15 0 ~ 63 0 ~ 63 0 ~ 63 0 ~ 10 58 or 186 Vertical area no. selection Horizontal area no. selection Red white balance adjustment Green white balance adjustment Blue white balance adjustment Data Reset for White Uniformity Compensation White uniformity compensation mode On/Off 58 : OFF, 186 : ON T WHITE UNIFORMITY ADJ. T WHITE UNIFORMITY ADJ. T WHITE UNIFORMITY ADJ. T WHITE UNIFORMITY ADJ. T WHITE UNIFORMITY ADJ.

White Uniformity Compensation-Data Reset T

-34-

IC1101

q HIC Board
K5RR

IC805

VR01

IC804 IC806 VR3502

IC01

K1A
TP501 VR501 IC3501 TP511

IC301

TPDHS
TP2231B

TPDVS TP512

Test Points and Locations

IC202
TP8253

q Main Comp-A Board

q Main Comp-B Board

K6C

TP2221G

IC302 TP8254 TP218

TP212 TP213 TP211 TP201 TP202 TP221R

Electrical Adjustments

TP217 TP219 TP203 TP5282 TP5281 TP221G TP221B

q P.F.C Board

K1

TP2211R

K6B

K6E

K6F

-35VR3503 IC3351 TP502 K5GG VR531 TP3571 VR3571 IC3571 TP503 VR561 TP513 K5BB VR3504

K15C

K15F

K15A

s Troubleshooting
NO POWER
Refer to next page
When power on/off button is pressed, the input voltage at pin 47 comes High.

IC1901 SUB CPU
KEY2 POWER FAIL LAMP DET. TEMP DET. 47 50 27 26
L: ABNORMAL H: ABNORMAL L: ABNORMAL H: ON

ON/OFF BUTTON To each boards

LAMP BST_SW. 54

5V_SW. FAN DRIVE

34 44

H:ON H:ON

Check that the POWER FAIL signal at pin 50 is correct. L : abnormal

Check that the TEMP DET. signal at pin 26 is correct. L : abnormal

Check that the LAMP DET. signal at pin 27 is correct. H : abnormal

LAMP SW.

29

H:ON

Check that the 5V_SW signal at pin 34 is correct. H : Power ON

12V

15V

5V

IC66A, Q671, Q681
LAMP REPLACE

WARNING

READY

Check that the FAN DRIVE signal at pin 44 is correct. H : Power ON

Check signal at pin 5 of T651

31

30

32

POWER FAIL Switching power supply

FAN

IC67A, IC68A, IC69A

Is fuse (F901) blown?

AC INPUT F901 SW902 FUSE THERMAL SW. SW904 INTER LOCK SW.

Check that the LAMP_SW signal at pin 29 is correct. H : Power On

READY

TEMP WARNING

INDICATORS

LAMP REPLACE

Check that the LAMP indicator and READY indicator are lighting. If both of indicators are not lighting, check the primary side of the power supply circuit or S5V of standby power supply circuit.

LAMP

-36-

Troubleshooting

Is thermal switch (SW901) operating ? If peripheral temperatures at the optical unit reaches 85°C, the thermal switch turns off. SW901 -- OPEN: abnormal

Abnormal temperature detection at the periphery of optical unit.

SW901

Is projection of lamp cover inside broken or not fitting correctry ? Check the interlock switch (SW904) and lamp cover. SW904 -- OPEN : abnormal

SW901 Interlock switch SW904 SW902
When projector turns on, LAMP SW signal comes LOW.

Is thermal switch (SW902) operating ? If peripheral temperatures at the lamp house reaches 100°C, the thermal switch turns off. SW902 -- OPEN: abnormal

When an abnormal temperature is detected at the periphery of lamp driver circuit, the voltage of this line comes HIGH.

Abnormal temperature detection at the periphery of P.F.C. circuit

LAMP SW.
CB2

LAMP.DET
CB2

7

TSW611

P.F.C. control

P.F.C. LAMP BALLAST UNIT
LAMP

Check that the thermal switch (TSW611) is operating. If temperature at peraiphery of P.F.C. circuit reaches 90°C, TSW611 turns on. TSW611 -- OPEN: Normal

-37-

Troubleshooting

NO POWER
PERIPHERY OF CHASSIS 1. Is fuse (F901) blown? Fuse may be opened when either the LAMP indicator or the READY indicator isn't Illuminated. Check the fuse. q For continued safety, replace with a fuse of the same type. TYPE T4.0AH 250V FUSE. (LITTLE FUSE INC. TYPE 215004) 2. Is projection of lamp cover inside broken or not fitting? Check the INTER LOCK switch(SW904) and lamp cover. SW904 ......................................... OPEN : abnormal 3. Is thermal switch(SW902) operating? If temperatures periphery of lamp house reaches 100°C, the thermal switch will be turned off automatically. SW902 ......................................... OPEN : abnormal 4. Is thermal switch(SW901) operating? (with the WARNING TEMP. indicator flashing)? If temperatures periphery of optical unit reaches 85°C, the thermal switch will be turned off automatically. SW901 ......................................... OPEN : abnormal MAIN COMP-C BOARD 1. Check that the Vcc-voltage(+5V) is applied to pins 4, 5 of K30R and pins 61-64 of K30EE. MAIN COMP-B BOARD 1. Check that the Vcc-voltage(+5V) is applied to pin 11 of IC1901, pin 38-40 of K15EE. 2. Check that the POWER FAIL signal is correct. Pin 50 of IC1901 .................................. L : abnormal 3. Check that the TEMP DET. signal is correct. Pin 26 of IC1901, pin 4 of K5M ........... L : abnormal 4. Check that the LAMP DET. signal is correct. Pin 27 of IC1901, pin 3 of K5A ........... H : abnormal 5. Check that the LAMP_SW signal is correct. Pin 29 of IC1901 ........................................... H : ON Pin 1 of K5A................................................... L : ON 6. Check that the 5V_SW signal is correct. Pin 34 of IC1901, pin 5 of K5P ..................... H : ON 7. Check that the FAN DRIVE signal is correct. Pin 44 of IC1901, pin 3 of K5P ..................... H : ON 8. Check that the LAMP BST_SW signal is correct. Pin 54 of IC1901, pin 2 of K5P ..................... H : ON

POWER, P.F.C. BOARD 1. Are the LAMP indicator(red) and READY indicator(green) light? If the LAMP and READY indicators do not illuminated, check the primary circuit and S5V of standby power supply circuit. 2. Check that the FAN DRIVE signal is correct. Pin 3 of K6P.................................................. H : ON 3. Check that the LAMP BST-SW signal is correct. Pin 2 of K6P .................................................. H : ON 4. Check that the 5V_SW signal is correct. Pin 5 of K6P .................................................. H : ON 5. Check that the POWER FAIL signal is correct. Pin 6 of K6P ......................................... L : abnormal 6. Is thermal switch(TSW611) operating? If temperatures periphery of P.F.C. circuit reaches 90°C, the thermal switch will be turned on automatically. TSW611 .................................... SHORT : abnormal 7. Check the signal at pin 5 of T651. (Switching power IC output signal)

-38-

Troubleshooting

NO PICTURE
AV, AV SUB BOARD 1. Check that the Vcc-voltages(+5V, -5V) are applied to AV circuits.
Pins 45-48 of K3001, pins 29-32 of K3002 ...................5V Pins 51-54 of K3001, pins 35-38 of K3002 ..................-5V Check IC1001 and IC1002.

MAIN COMP-A BOARD 1. Check that the AV/CG switching signal is correct.
Pin 16 of IC5201 ...........................................AV: H, CG: L Pins 10, 11 of IC5282 ....................................AV: L, CG: H

2. Check that the sync signals are correct.
TP5281, TP8254 ...................................................H-Sync TP5282. TP8253 .....................................................V-Sync

2. Check that the following input signals are observed correctly.
SIGNAL V-Sync H-Sync B G R Video S-C S-Y K3001-pin No. 17-18 19-20 23-24 25-26 27-28 35-35 39-40 43-44 K3002-pin No. 1-2 3-4 7-8 9-10 11-12 15-16 25-26 19-20

3. Check that the RGB signals are observed at following test points.
TP214,TP217,TP201, TP221R, TP2211R ............R-signal TP215,TP218,TP202, TP221G, TP2221G ...........G-signal TP216,TP219,TP203, TP221B, TP2231B.............B-signal

MAIN COMP-C BOARD 1. Check that the signals are observed at following test points.
TP401, TP402, TP403 ...............................R, G, B signals TPVRST, TPRST.......................................V-Sync, H-Sync

MAIN COMP-D BOARD 1. Check the signals at following test points.
- Video signal at TP2101 - V-sync signal at TP6131 - H-sync signal at pin 9 of IC6131

MAIN COMP-B BOARD 1. Check that the signals are observed at following test points.
TP501, TP502, TP503, TP511, TP512, TP513 ..........................................................R, G, B Drive signals

9

5

TP6131

48

SYNC 2 SEP. IC6131

3L-Y/C SEP. & Switch Circuit IC2101 IC6151

Y/VIDEO C

53 57

VIDEO CHROMA PROCESSING IC1101

DCLK/DHS/DVS AV_H 2
1 15

TP2101

MAIN COMP-D BOARD
VIDEO H-SYNC V-SYNC R G B
IC1001 IC1002
VIDEO/S-VIDEO

26

24

22

AV_B TP219

AV_G TP218

AV_R TP217

TP5281 TP5282

CG/AV AV_V 12 SYNC SW
1

H V

TP8254 TP8253

323

IC5281 13 IC5283 14
10,11 AV/CG

SYSTEM CONTROL & SCAN CONV. IC301

D/A IC2200
40

244

H-SYNC V-SYNC
3

43

46

B

G

R

CG_R CG_G CG_B

TP214 TP215 TP216

4 6 5 12 11

1

TP201 TP202 TP203
Q5211

R G B

IC5251 IC5252 IC5253

TP221R TP221G TP221B

7 15 22

IC2231

IC2221

IC2211

CG/AV RGB 8 SW IC5201 9
16

A/D IC202

TP2231B

TP2221G

TP2211R

AV BOARD

AV SUB BOARD
TP511

AV/CG CG: H

MAIN COMP-A BOARD MAIN COMP-B BOARD

RLCD PANEL

R-S/H RLEVEL SHIFT IC3501 IC501 47

TP501 R

TP512

GLCD PANEL

G-S/H GLEVEL SHIFT IC3531 IC531 47

TP502 G

MAIN COMP-C BOARD

TP403
26 18

TP402
24

TP401
22

TP513

BLCD PANEL
IC3561 TP3571 NRS

B-S/H BLEVEL SHIFT IC3561
FRP

TP503 B

IC561 47

16 14

LCD DRIVER IC401

TIMING CONTROL IC3301

9 38

TPVRST TPRST

CLOCK DRIVER IC3391

HCLK/STV/HST/ENB

-39-

Troubleshooting

NO SOUND
AV, AV SUB BOARD 1. Check that the Vcc-voltage(+9V) is applied at pins 36 of K3802. 2. Check that the AV/CG switching signal is correct. Pin 9, 10 of IC5001 ........................................ AV : L CG : H 3. Check that audio signal is observed at following points. Pins 9-10 of K3802, pins 11-14 of K3801 MAIN COMP-B BOARD 1. Check that the AV/CG switching signal is correct. Pin 4 of IC1904 .............................................. AV : L CG : H 2. Check that the MUTE signal is correct. Pin 39 of IC1901 ..................................MUTE On: H MAIN COMP-C BOARD 1. Check that sound volume control signal is correct. Pin 4 of IC431 POWER BOARD 1. Check that sound volume control signal is correct. Pin 4 of IC001 2. Check that audio signal is observed at pin 2 of IC001. 3. Check the MUTE signal at pin 3 of IC001. Pin 3 of IC001 ......................................MUTE On: H 4. Check that Vcc-voltage(+12V) is applied at pins 1 and 9 of IC001.

MAIN COMP.-A BOARD
AV/CG-SW 10,11

MAIN COMP.-B BOARD
AV/CG-SW 4

AUDIO IN

CG L CG R AV L AV R

1 13 2 12

CG/AV 15 SUDIO SW IC5001
14

Q5007

L
AUDIO

R

Q5008

SYSTEM 195 PORTB0 2 16 SDAT CONTROL BUFFER & SCAN CONV. 279 PORTB1 4 IC809 18 SCLK IC301

I/O EXPANDER IC1904
2 3

AV BOARD

AV SUB BOARD POWER BOARD

M_SCL M_SDA

MAIN COMP.-C BOARD
2 4

DAC IC431
3

SP901 SPEAKER
8 2 AUDIO

AUDIO OUTPUT 3 MUTE IC001
4 VOL

39

SUB CPU IC1901

Q1901

-40-

s Control Port Functions
q SUB CPU (IC1901) Port Functions
Pin No. Function Name
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 RXD0 TXD1 CNVSS MSCL MSDA RESET N.C. XOUT VSS XIN VCC R/C IN N.C. reserved RXD 1 1 SEC TXD 1 N.C. PIX RESET reserved reserved reserved reserved reserved TXD_SW1 TEMP ERROR LAMP ERROR TXD_SW2 LAMP SW WARNING LED READY LED LAMP REP LED FAN_SPEED UP 5V_SW reserved reserved reserved reserved MUTE SW reserved N.C. WRM TXD_SW3 FAN_DRIVE OPTION KEY3 KEY2 KEY1 AVSS POWER FAIL VREF AVCC N.C. LAMP_BST_ON CLKS(BUSY) CLKO

Function
RXD 0(Write for Sub CPU flash ROM) TXD 0(Write for Sub CPU flash ROM) Write for Sub CPU flash ROM S-IIC SCL S-IIC SDA Reset Input CPU Reference Clock Output Vss CPU Reference Clock Input Vcc Remote Control Signal Input no use RXD 1(Communication for Main CPU) 1Second Counter TXD 1(Communication for Main CPU) Pixel Works Reset no use no use no use no use no use RS232C SW1(Write for MCI Card) Abnormal Temperature Lamp Status RS232C SW2(Write for Main CPU Flash ROM) Lamp Power WARNING LED ON/OFF READY LED ON/OFF LAMP REPLACE LED ON/OFF Fun Speed Up 5V Power Supply ON/OFF no use no use no use no use Audio Mute no use N.C. PW Write Mode RS232C SW3 Fun Drive Destination Option Key SW 3 Key SW 2 Key SW 1 GND Power Fail Detection Input Vcc Vcc Lamp Ballast ON/OFF Write for Sub CPU Flash ROM Write for Sub CPU Flash ROM

Polarity
active: L active: L active: L active: L L: reset 8MHz 8MHz active: L active: L pulse active: L H: PW off

I/O
I O I I/O I/O I O I I I I O I O O O O O O O O O I I O O O O O O O O O O O O O I O O I I I I I I I I O O I

L: Abnormal H: No Light H: ON H: ON H: ON H: ON L: ON H: ON

H: ON L: Write Mode H: ON

L: Abnormal H: ON" active: H active: L

-41-

Control Port Functions

q I/O Expander (IC1904) Port Functions
Pin No. Function Name 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 GND SCL SDA Function no use SCL SDA AV/CG Switch NTSC/OTHER ADPD MCISEL FOCUS FOCUS + ZOOM ZOOM + 5V L: MCI H: else L: MCI H: else L: ON H: OFF L: ON H: OFF L: ON H: OFF L: ON H: OFF L: active L: active Action I/O O I/O I/O O O O O O O O O -

q I/O Expander (IC1905) Port Functions
Pin No. Function Name 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 GND SCL SDA Function no use SCL SDA MCI CARD IN MCI CARD ACCESS S-Input Detection VIEW _ BUSY VW _ OFF PALM/N AUDIO MUTE MOUSE 5V H: OFF L: ON L: MCI H: else O O O O O L: active L: active Action I/O O I/O I/O I I

-42-

s Waveforms

TP2101 AV VIDEO

TP6131 AV V-SYNC

TP217 TP201 R-INPUT

TP221R A/D R-INPUT

TP218 TP202 G-INPUT

TP221G A/D G-INPUT

TP-219 TP203 B-INPUT

TP221B A/D B-INPUT

-43-

Waveforms

TP8253 V-SYNC

TP8254 H-SYNC

TP2211R D/A R-OUTPUT

TP501 TP511 S&H R-OUTPUT

TP2221G D/A G-OUTPUT

TP502 TP512 S&H G-OUTPUT

TP2231B D/A B-OUTPUT

TP503 TP513 S&H B-OUTPUT

-44-

TPDVS V-SYNC

TPDHS H-SYNC

TP3571 NRS

-45-

s Cleaning
After long periods of use, dust and other particles will accumulate on the LCD panel, prism, mirror, polarized glass, lens, etc., causing the picture to darken or color to blur. If this occurs, clean the inside of optical unit. Remove d