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EPSON ELP-3500 Service Manual

2-13

2.5  INTERFACE BOARD UNIT

This unit consists of two boards (IB1 and IB2) with interfaces that can be connected to
external devices (the host computer, external speaker, and video device). The unit
involves the input/output interface connector and the noise filter circuit.

Figure 2-12.

Summary of Contents for Elp-3500

Page 1: ...ELP 3500 Epson America Inc TM ELP3500 Service Manual www electronicsrepair net ...

Page 2: ...ii ELP 3500 Service Manual ...

Page 3: ...tenance work be sure to read and observe every safety precautions and all rules Manual contents are as follows Precautions Operator Safety Product Safety Requirements for Servicers Chapter 1 Product Features Part Names Connection Specifications Chapter 2 Theory of Operation Hardware Internal Connections Unit Functions Chapter 3 Disassembly and Assembly Main Unit and Remote Control Chapter 4 Troubl...

Page 4: ...the light is on 3 ACCIDENT PREVENTION To prevent the device or its components from falling perform any operation only after the device is placed on a flat and stable surface Be careful not to place tools or parts on top of the device or at your feet To prevent this product from being used before it is totally reassembled be sure not to leave the product out during any repair work and do not place ...

Page 5: ...ers Whenever removing parts or repairing the product work in a clean room free of dust and dirt to keep the optical elements away from dirt REQUIREMENTS FOR SERVICERS Authorized servicers should have the following knowledge and skill for maintenance of the ELP 3500 Training in an EPSON authorized maintenance training program and authorization as a service engineer Sufficient understanding of the o...

Page 6: ... Mouse Interface Specifications 1 15 1 6 2 Computer Interface Board 1 18 1 6 3 Computer Audio Input 1 18 1 6 4 Video Interface Board 1 19 1 6 5 I O Terminal Layout 1 21 Chapter 2 Theory of Operation 2 1 Hardware 2 1 2 1 1 Electrical System Connections 2 2 2 1 2 Optical System Connections 2 3 2 2 Power Supply Unit 2 4 2 3 Main Board 2 6 2 4 Driver Board 2 11 2 5 Interface Board Unit 2 13 2 6 Contro...

Page 7: ...he Interface Unit Assembly 3 18 3 2 13 Removing the Lamp Outer Housing Unit 3 19 3 2 14 Removing the Adjustable Foot Unit 3 20 3 2 15 Removing the Optical Block 3 21 3 2 16 Removing the Projector Lens Unit PLU 3 22 3 2 17 Removing the Intake Fan Optical Head Unit Light Guide Unit 3 23 3 2 18 Removing the Inlet Unit 3 25 3 3 Disassembling and Assembling the Remote Control Unit 3 26 Chapter 4 Troubl...

Page 8: ...1 to 300 inches at a projection distance from 4 to 40 feet 1 2 to 12 3 m High resolution full color 16770 thousand colors Three R G and B TFT liquid crystal panels containing 307 200 pixels support a VGA resolution of 640 x 480 dots approximately 920 thousand pixels The grid between pixels in the liquid crystal panel is thinner than in conventional projectors to provide sharp contrast Remote contr...

Page 9: ...ect this device to the computer conforming to DDC the output signals of it are automatically converted into VGA images and projected Simple Maintenance Maintenance is easy and the number of adjustments has been minimized 1 2 PARTS OF THE PROJECTOR 1 2 1 EXTERIOR VIEW OF THE MAIN FRAME Figure 1 2 Figure 1 3 ...

Page 10: ... 3 Figure 1 4 1 VCR Syn Video 2 VCR Video 3 VCR Audio Left 4 VCR Audio Right 5 Output for External Speakers 6 Serial Port to Mouse Port DB9 or PS 2 7 VGA Connection for Video from Computer 8 Audio from Computer Figure 1 5 Figure 1 6 ...

Page 11: ...EPSON ELP 3500 Service Manual 1 4 1 2 2 INTERIOR VIEW OF THE MAIN FRAME Main Board Power Supply Safety Switch Figure 1 7 Interface Unit Driver Board Control Panel Speaker Projector Lens Figure 1 8 ...

Page 12: ...EPSON ELP 3500 Service Manual 1 5 1 2 3 EXTERIOR VIEW OF THE REMOTE CONTROL Figure 1 9 ...

Page 13: ...EPSON ELP 3500 Service Manual 1 6 1 2 4 INTERIOR VIEW OF THE REMOTE CONTROL Figure 1 10 Figure 1 11 ...

Page 14: ...EPSON ELP 3500 Service Manual 1 7 1 3 CONNECTION 1 3 1 MS DOS and Compatibles Desktop Figure 1 12 Notebook Figure 1 13 Attached accessories ...

Page 15: ...accessories Figure 1 14 DIP switch settings must match machine type Refer to the table below for details The default setting is MAC13 mode Table 1 1 Mode Switch A ON Switch B ON MAC13 Mode 640 x 480 1 2 5 8 MAC16 Mode 832 x 624 2 4 5 8 Multi Res 1 2 5 3 4 8 Figure 1 15 ...

Page 16: ...EPSON ELP 3500 Service Manual 1 9 PowerBook Figure 1 16 1 4 MAIN COMPONENTS Main Board Figure 1 17 ...

Page 17: ...EPSON ELP 3500 Service Manual 1 10 Driver Board Figure 1 18 Interface Unit Figure 1 19 ...

Page 18: ...EPSON ELP 3500 Service Manual 1 11 Power Supply Unit Power Supply Unit Figure 1 20 Light Guide Block Figure 1 21 ...

Page 19: ...EPSON ELP 3500 Service Manual 1 12 Optical Head Unit Figure 1 22 Projector Lens Unit Figure 1 23 ...

Page 20: ...EPSON ELP 3500 Service Manual 1 13 Lamp Inner Housing Figure 1 24 Control Panel Figure 1 25 ...

Page 21: ...uter I O interface analog RGB VGA monitor board video board Audio input interface stereo Input Source 2 Video image input interface S image input interface Video audio input interface stereo REMOTE CONTROL Wireless Remote Control Within 33 feet 10 m from and within an angle 30 degrees of the projector s receptor Wired control is available using the exclusive cable Operation Key One switch availabl...

Page 22: ...ble 1 3 PS 2 Connector Pin Assignments Pin Signal Functions 1 Data I O data bus The signal line with the open collector driver is pulled up to 5 V through a pull up resistor 2 NC Not connected 3 GND Ground 4 5V 5 V output 5 Clock Synchronous clock signal The signal line with the open collector driver is pulled up to 5 V through a pull up resistor 6 NC Not connected PS 2 port driving procedure The ...

Page 23: ... resistor on the main logic board 2 POWER ON In Macintosh type computers this pin is connected to pin 4 so that using a key on the ADB keyboard activates this signal and turns on the power In other models this pin is not connected 3 5 V 5 V output 4 GND Ground Procedure for driving the ADB port An ADB device communicates with a Mac through a protocol specified by Apple Computer Inc which manipulat...

Page 24: ...se Connector Pin Assignments Pin Signal Type Functions 1 XA CLK ADB Encoder signal I O data signal synchronous clock signal 2 XB DATA Encoder signal I O data signal 3 YA Encoder signal 4 YB Encoder signal 5 LEFT ID0 Left button signal control signal 6 RIGHT ID1 Right button signal control signal 7 NC Common Disabled 8 TxD Serial Transmit signal 9 RxD Serial Receive signal 10 DTR Serial Projector d...

Page 25: ...ND 13 Horizontal synchronization 6 Red video GND 14 Vertical synchronization 7 Green video GND 15 SCL 8 Blue video GND 1 6 3 Computer Audio Input This connector is a stereo mini jack with 2 circuits for detection pins The detection pins which are not required for audio input provides an audio out terminal Table 1 8 Pin No Signal 1 GND 2 Computer audio input L 3 Computer audio input R Other pins NC...

Page 26: ...B 1 6 4 Video Interface Board S terminal input Figure 1 31 Mini DIN 4 pin with Detection Pin Table 1 10 Pin Signal 1 2 6 GND 3 Y signal input 4 C signal input 5 Input detection terminal CVBS input RCA gold plated connector only insertion portion right angle H 15 mm color yellow Figure 1 32 Table 1 11 Pin Signal 1 GND 2 Video input 4 2 3 1 5 6 2 1 ...

Page 27: ...re 1 33 Table 1 12 Pin Signal 3 6 GND 4 Audio R return 7 Audio L return 5 Audio input L 8 Audio input R Audio output Stereo mini jack with 2 circuits for detection pin Figure 1 34 Table 1 13 Pin Signal 1 4 GND 2 Audio output L 3 Audio output R 5 Detection of Line out jack insertion Other pins Not connected 1 2 3 4 5 6 7 8 9 Pins 3 6 Pins 5 8 Pins 4 7 ...

Page 28: ... the rear panel Table 1 14 Left row from top to bottom S Video terminal input mini DIN 4 CVBS video input RCA yellow Video audio input RCA left white Video audio input RCA right red Audio output stereo mini Right row from top to bottom Multi mouse jack Computer video input D SUB 15 Computer audio input stereo mini Figure 1 35 ...

Page 29: ...EPSON ELP 3500 Service Manual 1 22 ...

Page 30: ...hrough the light valves are combined by a prism and projected through the lens unit IINTERFACE UNIT I O interface connector board PC video audio RS 232 remote DC OUT DRIVER BOARD Generates the R G B video signal Detects the brightness and controls the temperature overheating protection MAIN BOARD Generates the R G B light valves memory and the drive signals Sets initial operations for interface ci...

Page 31: ...ontrol signal detection Cools the lamp Generates 65 V from AC IN for light source lamp Generates 5 V 12 V 18 V Projector function control CPU ROM VRAM light valve driver others Generates image data LCD panel Audio output For image projection metal halide discharge lamp A D converter for analog video signal Audio signal amplitude others External device connection Control Panel IB2 IB1 Interface Uni...

Page 32: ...Guide Unit Optical Head Projector Lens Figure 2 3 Figure 2 4 Optical Head Assembly Table 2 2 UNIT NAME FUNCTIONS AND REMARKS LAMP INNER OUTER HOUSING Includes one metal halide lamp as a light source Lamp inner housing and lamp outer housing are mounted LIGHT GUIDE UNIT Disperses light from the light source uniformly using the A B lens array Disperses the light in three parts R G B PROJECTOR LENS Z...

Page 33: ...Unit Figure 2 5 Functional Block Diagram Figure 2 6 An interlock switch is included for safety purposes The interlock switch shuts off the supply of AC power if the lamp cover at the bottom of main chassis is opened The safety switch input signal is designed for protection from overheating It stops power output to the light source lamp if the projector detects overheating in the lamp housing area ...

Page 34: ...tification circuit reduces noise on the AC line and generates DC voltage for the regulator The regulator generates various DC voltage levels shown in the table below for the switching regulator The regulator detects the voltage output level on the 5 V line and feeds the information back to the switching circuit to maintain a stable output level regardless load variations Every output voltage level...

Page 35: ...video memory digital video processor and circuits to control the interface control panel fan speaker receptor board interface etc The driver board controls everything except video signal generation The driver board is available as a unit for the service parts IC304 includes firmware to set initial values and control projector functions Fuses for the protection of the electric circuits are soldered...

Page 36: ...451002 2 A 18 V ROM Interface FU501 451002 2 A 12 VS Fan speaker FU502 451002 2 A 12 VA Interface FU503 CCP2E20 0 8 A 5 VA A D converter FU504 451002 2 A 5 VD All circuits CPU interface FU505 CCP2E20 0 8 A 5 VT Receptor circuits IC304 FU500 FU501 FU502 FU503 FU504 FU505 Figure 2 8 ...

Page 37: ...eaker AMP Digital croma A D converter C N 5 0 2 C N 5 0 3 C N 4 0 0 C N 5 0 4 CN 600 OSC 8 MHz C N 1 0 0 C N 2 0 0 C N 1 0 1 OSC 16M Fuse Connects to the power supply with cable 18 V 12 VS 12 VA 5 VA 5 VD 5 VT POWER ON MAD Connects to the control panel LED control Thermos signal SCL SBA M1 11 Mouse R G B IN GIN HS VS Connects to receptor board Connects to the interface board G S 0 7 B S 0 7 Read w...

Page 38: ...tude and lamp circuits Digital R G B input signals are synchronized as image data and the control timing is stored in a three state buffer before being output to the driver board The analog R G B signal is amplified by the amplitude circuit and converted into individual data signals of 7 bits each by A D converter circuit before being output to the driver board Analog R G B output signals are tran...

Page 39: ... hours of use This indicates that it is time to replace the lamp You can check the lamp life on the Setting Screen When the light source valve runs out before its life The lamp monitor lights red If you observe the conditions above replace the light source valve and reset the timer as follows While holding down the TRACKING and SYNC buttons press and hold down the POWER button until the three stat...

Page 40: ... Outline Signals RT 0 7 GT 0 7 and BT 0 7 output from the main board are converted into analog signals by the digital to analog converter DAC IC601 before being output to the driver circuit for the light valves Timing signals for the monitor output from the main board are converted into the signals for the light valves LCDs by IC800 before outputting them The sub brightness circuit modifies the ou...

Page 41: ...b brightness circuit Driver LCCOM control Light Valve R Driver CN850 Light Valve G Driver CN900 Light Valve B Driver CN950 Output divider Analog R1 R6 Output divider Analog G1 6 Output divider Analog B1 6 Fuses Power supply 18 V 12 V 5 V 5 VDA RT 0 7 GT 0 7 BT 0 7 Data clock H start Display control signal SCL SDA Data clock Lamp 2 SCK 1 6 DXIN CLXIN ROT RAD J1 J2 RAD J1 J2 RAD J1 J2 LCCOM R G B R ...

Page 42: ... UNIT This unit consists of two boards IB1 and IB2 with interfaces that can be connected to external devices the host computer external speaker and video device The unit involves the input output interface connector and the noise filter circuit Figure 2 12 ...

Page 43: ...connector Noise filter diode circuit H V SCL control J102 Mouse Com Computer In Audio In R G B R L Connects to CN100 IF2 on main board Noise filter Interface board IB2 J100 Noise filter C N 1 0 0 J101 Noise filter Noise filter J102 S Video Video In Audio L Audio R Audio Out R G B R L Connects to CN101 IF1 on main board Interface board IB1 ...

Page 44: ...the main board Figure 2 15 2 7 RECEPTOR BOARD A detector mounted on the receptor board senses the infrared signals from the remote control The receptor board is attached to the power supply unit and placed in the front of the unit Control of any signals received by the receptor board is transferred to the CPU as interrupt signals Figure 2 16 ...

Page 45: ...s a speaker Audio signals from the amplitude circuit on the video board are output to this speaker Also audio signals are available from externally connected speakers In this case balance between internal and external speakers is adjustable using the fade function Figure 2 17 ...

Page 46: ...ght source lamp uniform before dividing it into 3 light outputs R G B Lenses and mirrors built in the block disperse the light The drawings below show the appearance and an internal block diagram of the light valve block Figure 2 18 CDM Lens Adjustment Unit PBS Multi lens B Multi lens A GCM Condenser Lens F Condenser Lens E RGB Condenser Lens RGB Polarization Unit Figure 2 19 ...

Page 47: ...nd reflects blue and green lights from the light source GDM The GDM is a light filter that looks blue in visual light The GDM filter transmits only blue light from the light source The light input to the GDM is only blue and green light reflected by the CDM as described above and green light is reflected by the GDM and provided to the G condenser lens D E Condenser Lens The D E condenser lens coll...

Page 48: ...valve has its own part number and is incompatible with the others Consequently their part numbers differ as summarized in the table below Table 2 9 NAME PART NO REMARKS LIGHT VALVE G 1021660 1028151 1 Light valve G does not have a position adjust plate LIGHT VALVE B 1022063 1027966 1 Light valve B has a blue label on the FPC cable LIGHT VALVE R 1021674 1027964 1 Light valve R has a red label on th...

Page 49: ...SM UNIT The prism unit creates the three lights which are transmitted through the light valve Figure 2 21 2 11 PROJECTOR LENS The projector lens unit has a zoom function 1 4 and focus adjustment function Zoom Function Focus Adjustment Figure 2 22 ...

Page 50: ... 4000 hours When operating time exceeds 4000 hours the lamp indicator on the control panel blinks automatically If you encounter this condition replace the light source valve as soon as possible The safety switch on the lamp outer housing beside the lamp housing detects overheating If the temperature exceeds the safety zone because of abnormal lamp conditions this switch shuts down the power Figur...

Page 51: ...Service Manual 2 22 Table 2 10 Warning Light Color Status Temp Red Projector is hot Lamp Red Lamp needs to be replaced Temp and Lamp Flashing Red Projector problem Try turning off and back on first Then see Chapter 4 ...

Page 52: ...ssories Prepare the tools and accessories listed in the table below Table 3 1 Required Tools Name Quantity Supplier Use Phillips screwdriver 2 1 Commercial Dissasembly of the case and interior Flat blade screwdriver 1 Commercial Removal of power connnector for light Tweezers 1 Commercial To unlock the FPC connector on the driver board Phillips screwdriver 1 1 Commercial Removal of the optical unit...

Page 53: ...media such as diskettes and magnetic cards Handle the projector lens and light guide units with care as they are highly susceptible to vibration and shock Do not try to disassemble any part for example the power supply unit not covered in this manual Operations that Require Adjustments and Checks When you perform one of the removal or replacement operations in the table below you need to perform t...

Page 54: ...ailed descriptions of disassembly procedures are given in sections 3 2 1 through 3 2 18 Upper case 3 2 2 Air filter frame 3 2 3 Main board 3 2 4 Handle 3 2 1 Exhaust fan 3 2 5 Safety switch 3 2 6 Control panel 3 2 7 Driver board 3 2 10 Power supply unit 3 2 11 Interface unit 3 2 12 Lamp outer housing 3 2 13 Speaker 3 2 8 Adjustable feet 3 2 14 Optical block 3 2 15 Projector lens unit 3 2 16 Intake...

Page 55: ...lamp mounting screws from the inner housing Screws M4x7 5 F Ni P N 1021771 Mounting torque 4 5 kg cm 3 9 lb inch 3 Pull up the handle on the lamp inner housing and remove the lamp unit Warning 1 The lamp unit is very hot immediately after use and may burn you if handled carelessly Before removing the lamp unit make sure the temperature of the lamp inner housing unit has cooled down 2 When installi...

Page 56: ... to remove the handle Bend the center of the handle holder cover up forming an arch 2 Remove 2 screws beneath the handle holder cover Screws M3x12 F Zn P Tight P N 1021823 Mounting torque 6 0 kg cm 5 2 lb inch 3 Remove 4 case unit fixing screws on both sides Screws M4x8 F ZB Bind P N 1033026 Mounting torque 6 0 kg cm 5 2 lb inch Caution The handle holder cover has claws on both ends They may be da...

Page 57: ...gure 3 7 4 Hold the left and right sides handle and fan guard sides of the upper case unit and lightly pull the handle straight up 5 Disconnect the speaker cable from connector CN400 on the main board 6 Unlock connector CN504 on the main board before disconnecting the control panel cable from it 7 Remove the upper case 8 Remove the handle out of the lower case unit ...

Page 58: ...EPSON ELP 3500 Service Manual 3 7 3 2 3 Removing the Air Filter Frame Air Filter Frame Tab Figure 3 8 1 Push the tab on the air filter frame Then lift it up ...

Page 59: ... are summarized in the table below Number Connector Function and Remarks 1 CN100 Interface unit 2 CN101 Interface unit 3 CN400 Speaker unit 4 CN501 Power supply unit 5 CN502 Intake fan 6 CN503 Exhaust fan 7 CN504 Control panel 8 CN505 Power supply unit 9 CN600 Receptor board Removed in Section 3 2 1 Caution Before disconnecting the FPC cable from connectors CN100 and CN101 1 and 2 gently pull each...

Page 60: ...ntinued from previous page Screw FG Strap Figure 3 10 Screws Screws Screws Remove Bracket Figure 3 11 2 Remove the screw mounting the FG strap on the power supply unit Screw M3x6 F Ni Sems P N 1033025 Mounting torque 6 0 kg cm 5 2 lb inch ...

Page 61: ...ue 6 0 kg cm 5 2 lb inch 1 Screw M3x12 F Zn Bind P Tight P N 1021823 Mounting torque 6 0 kg cm 5 2 lb inch 4 Grasp the main board block on the left side the portion indicated by the arrow in the photo and disconnect the connector from the interface board assembly Caution To avoid malfunctions caused by wire breaking or solder flaking never apply any mechanical stress to the board ...

Page 62: ...6 F Ni P N 1033122 Mounting torque 6 0 kg cm 5 2 lb inch 3 Remove 2 screws mounting the exhaust fan and separate the fan and holding plate Screws M4x10 F Zn Bind P N 1022793 Mounting torque 6 0 kg cm 5 2 lb inch Caution 1 When installing the exhaust fan use care with its orientation Installing the fan in the reverse orientation may result in a device failure or extended cooling time because of ove...

Page 63: ...ted to the safety switch 2 Remove 2 mounting screws from the safety switch and detach the safety switch Screws M3x8 F Zn P Tight P N 1021824 Mounting torque 6 0 kg cm 5 2 lb inch Caution When removing the Fast on terminals do not apply excessive force to the terminals on the safety switch in the horizontal or vertical direction The polarity of the cables blue white is not significant connect them ...

Page 64: ...ce Manual 3 13 3 2 7 Removing the Control Panel Prerequisite Complete the steps explained in Section 3 2 1 Tabs Tabs Figure 3 15 1 Pull down the tabs from inside Then remove the control panel on the upper case Figure 3 16 ...

Page 65: ...t and remove the speaker along with the bracket Screws M3x8 F Zn P Tight P N 1021824 Mounting torque 6 0 kg cm 5 2 lb inch Caution 1 The speaker unit contains a permanent magnet Keep it away from electromagnetic media such as diskettes and magnetic cards 2 When mounting a speaker align the 3 screw holes in the speaker with those in the frame then tighten the screws with same tightening torque ...

Page 66: ... 3 18 1 Remove the screw mounting the receptor to the power supply unit Screw M3x6 F Ni P N 1033122 Mounting torque 4 5 kg cm 3 9 lb inch 2 Disconnect the cable from CN600 on the driver board block and remove the receptor board assembly Caution When installing the receptor board assembly align the hole in the board with the boss on the power supply unit before tightening the screw ...

Page 67: ...ws Figure 3 19 1 Although the illustration above shows 2 GND plate mounting screws and the GND plate those parts are actually removed in step 2 of Section 3 2 4 on page 3 9 2 Unlock the connector locks for CN850 CN900 and CN950 to disconnect the light bulb FPC cable 3 Remove 4 driver board assembly mounting hex stud screws 4 Hold both edges of the driver board assembly and pull it straight up ...

Page 68: ...pply unit Screws M3x8 F Zn P N 1021824 Mounting torque 6 0 kg cm 5 2 lb inch 4 Remove the ground cable mounting screw Screw M4x6 F Ni P N 1033025 Mounting torque 6 0 kg cm 5 2 lb inch 5 Pull the power supply unit straight up with the inlet cover Caution When removing the power supply unit take care not to bend or damage the bosses on the lower case unit When installing the power supply unit align ...

Page 69: ... 2 interface unit assembly mounting screws Screws M3x8 F Zn P Tight P N1021824 Mounting torque 6 0 kg cm 5 2 lb inch 3 Remove the fan holding plate mounting screw Screw M3x6 F Ni P N1033122 Mounting torque 6 0 kg cm 5 2 lb inch 4 Slide the interface unit slightly inward so it does not contact the frame before removing it Caution When installing the interface board assembly align the 2 positioning ...

Page 70: ... Screws M3x8 F Zn P Tight P N 1021824 Mounting torque 6 0 kg cm 5 2 lb inch 2 Remove the lamp outer housing unit mounting screws and remove the lamp outer housing unit Screws M3x8 F Zn P N 1021824 Mounting torque 6 0 kg cm 5 2 lb inch Caution The interior of the lamp outer housing is susceptible to dust if necessary clean it before reinstalling it The lamp outer housing remains hot for a while aft...

Page 71: ...he foot axis upward to remove it 3 Slide the upper side foot lever side of the compression spring to remove it 4 Remove the foot lever pin then remove the foot lever Caution When installing or removing the adjustable foot unit do not fold or peel the foot seal on the lower case Insert the foot lever then replace the counter spring and finally insert the foot axis When installation is complete pres...

Page 72: ...e steps explained in sections 3 2 1 3 2 4 3 2 5 3 2 10 3 2 11 3 2 12 and 3 2 13 Screws Screws Figure 3 26 1 Remove 4 optical block mounting screws Screws Mx14 F Zn Bind P Tight P N 1021825 Mounting torque 6 0 kg cm 5 2 lb inch 2 Pull the optical block straight up from the lower case Figure 3 27 ...

Page 73: ...or lens unit Screws M4x6 F Zn P N 1004532 Mounting torque 6 0 kg cm 5 2 lb inch Caution 1 When installing the projector lens unit align the 2 bosses on the frame with the positioning holes before tightening the screws Tighten the screws with a torque of 6 0 kg Do not make the screws too tight too great a mounting torque may damage the projector lens unit 2 Take care not to touch the lens surface o...

Page 74: ...3 2 15 Intake Fan Screws Figure 3 29 Intake fan 1 Remove 2 intake fan mounting screws and remove the intake fan Screws M4x20 F Zn S2W1 P N 1032848 Mounting torque 6 0 kg cm 5 2 lb inch Caution When installing the intake fan place it label side down on the aluminum die cast side and so that its cable is oriented as shown in the photo on the next page Clean the intake fan until it is free of dust an...

Page 75: ...e optical head unit Screws M4x10 F Zn P N 1022793 Mounting torque 6 0 kg cm 5 2 lb inch Caution Do not touch the 3 light valve screens on the light guide unit with your hands and do not bend the FPC cable When installing the light guide unit on the optical head unit align the 2 bosses beside the screws for the light guide unit to the holes in the optical head unit before tightening the screws The ...

Page 76: ...tions 3 2 1 3 2 4 3 2 5 3 2 10 3 2 11 3 2 12 3 2 13 and 3 2 15 Screw Figure 3 31 1 Remove the inlet unit mounting screw Screw M3x8 F Zn P Tight P N 1021824 Mounting torque 6 0 kg cm 5 2 lb inch 2 Remove the cable wire from 4 clamps 3 Pull up the board section of the inlet unit to remove the unit Clamps Figure 3 32 ...

Page 77: ...control unit only to clean its trackball or buttons Figure 3 33 Figure 3 34 Figure 3 35 1 Remove the battery cover from the rear panel and remove 2 battery cells 2 Remove 1 screw behind the battery holder 3 While pushing up the rear cover push the 4 hooks for the battery block in to unlock the cover 4 Bend the rear cover right and left to unlock the 6 hooks before removing the cover 5 Remove 4 fix...

Page 78: ...sories required for projector troubleshooting including fault isolation are listed below Table 4 2 Name Quantity Use Remarks Projector screen 1 To project images Ruler 10 feet 3 m 1 To measure the projection distance Small size mirror 1 To check the optical axis digital mirror or round mirror with a diameter of approx 2 cm Host computer 1 To supply test patterns PC compatible Color display 1 To ma...

Page 79: ...isplay problem LED display or fan heat exhaust problem Go to Display Mode Go to Image Quality Go to Audio Mode Go to Video Display Mode Go to System Initialization Go to RS 232C Control Go to Remote Control Yes Yes Yes Yes Yes Yes Yes No No No No No No No Yes Check the operating environment temperature and condensation and AC input power Try to replace input devices host computer and video equipme...

Page 80: ...he power supply Does the POWER LED light now YES YES NO NO NO NO NO NO NO NO NO NO NO Go to Display Mode Do the fans work Check CN502 and CN503 connection on the main board and on the driver board Do the fans work now If fuse FU501 is blown on the main board replace the main board Do the fans work now Replace fans Is lamp indicator normal Check CN505 connection on the main board Is it OK Is lamp i...

Page 81: ...on the driver board Does the screen appear now Reconnect the main board and driver board NO Does the screen appear now Replace F600 on the driver board Does the menu key work normally Menu screen appears Does the menu key work normally now Replace the main board Replace the driver board YES YES YES YES YES YES YES Replace the driver board Does the lamp light now Replace the power supply NO YES YES...

Page 82: ... NO NO NO Does the Brightness control work with the video menu Does the Brightness control work with the video menu now Replace the driver board Replace the main board Go to Audio Mode Is loop throughput OK Replace the main board Is loop throughput OK now Replace the driver board YES YES YES YES YES YES YES Replace the interface unit Is PC input OK now NO YES Is video input OK Replace the main boa...

Page 83: ...FU501 on the main board If blown replace main board NO NO NO YES YES YES NO NO NO NO Is audio out OK Reconnect CN501 on the main board Is audio out OK now Replace the interface unit YES YES YES YES Replace the main board Replace interface unit Is speaker output OK now Is speaker output OK NO NO YES YES Does the volume adjustment work with the remote control Replace the remote control Does the volu...

Page 84: ...iver board Are there still ghosts Can you still see ghosts Replace the main board Replace the optical block unit YES YES YES YES YES YES YES YES YES Is there any flicker Adjust flicker Is there still flicker Replace the driver board Is there flicker Replace the optical block unit NO Is the white balance OK Adjust the white balance NO Is the white balance OK now Replace the driver board NO Is the w...

Page 85: ... control work now Reconnect CN600 on the main board Does the wireless remote control work now Replace the receptor board NO NO NO YES YES YES NO Replace the main board Does the wireless remote control work now NO YES Do all buttons work Replace the remote control unit Does the new one work Do any buttons work Replace the main board NO NO Good control Functions OK YES ...

Page 86: ... computer cable and an RS 232C cable Insert the image adjustment program diskette in the diskette drive and run the program A menu appears Select the menu options and program the settings into the flash ROM on the projector s main board 5 1 1 When to Use the Image Adjustment Program The table below lists conditions that require adjustments in the image adjustment program Table 5 2 Condition Adjust...

Page 87: ...creen about 8 feet 2 4 m away from the projector 2 Turn on the projector and host computer 3 Adjust the focus ring on the projector so that the projected image on the screen is in focus Use the zoom ring to set the screen projection size to 60 inches Start up Procedure Windows 95 system 1 Insert the image adjustment program diskette into the diskette drive 2 Select the My computer from the initial...

Page 88: ...ent RS 353 Ver 2 10 SEIKO EPSON 0 Initialization 1 Flicker Adjustment 2 Ghost Adjustment 3 Sub Contrast Adjustment 4 Data Transfer 5 6 7 8 9 END Select the number 1 9 0 Initialization Type 0 The message SET LCP COMMUNICATION MODE appears on the computer screen after you select this menu Then the program feeds data automatically into the registers for gamma registration The projector displays the r...

Page 89: ...t corner of the screen 4 Press Enter and a 16 level green scale pattern should appear on the projector screen 5 Just as in step 3 find the display with the minimum flicker 6 Press Enter and a 16 level blue scale pattern should appear on the projector screen 7 Just as in step 3 find the display state with the minimum flicker 2 Ghost Adjustment 1 Type 2 from the main menu to eliminate ghosts 2 Make ...

Page 90: ...s Enter and a 16 level green scale pattern should appear on the screen 5 Just as in step 3 adjust the image so the border line of each pattern appears thinnest 6 Press Enter and a 16 level blue scale pattern should appear on the screen 7 Just as in step 3 adjust the image so the border line of each pattern appears thinnest 3 Sub Contrast Adjustment 1 Type 3 from the main menu to adjust the contras...

Page 91: ... the screen 9 Look at the white balance on the screen If the hue of 16 level grayscale pattern seems reddish greenish or bluish you must type N and run the sub contrast adjustment again If the white balance is satisfactory type Y 10 Use the eighth raster in the 16 grayscale pattern on the projection screen to check the white balance Type Y if the sub contrast adjustment is satisfactory Type N to r...

Page 92: ... flash ROM The values you have set will not be saved in the projector unless you execute this menu step Be sure to run this menu option after making any adjustment with the image adjustment program 1 Type 4 from the main menu for Data transfer 2 Make sure the top line of following messages appear on the monitor screen ...

Page 93: ...it 1 Data Length 8 Download Area GAMMA GAMMA File 00400000 GAM Are you sure Y N Y Flash download was successful Figure 5 8 3 Type Y if all settings are OK The image adjustment program starts writing values into the projector s flash ROM Type N to bring back the main menu and rerun adjustments 9 End Type 9 to terminate the image adjustment program The A prompt will appear on the computer screen ...

Page 94: ...EPSON ELP 3500 Service Manual 5 9 ...

Page 95: ...Power Supply Block 2022610 1 2 1 Power Supply Unit 2022611 1 2 2 Ballast Circuit Assembly 2022612 2 3 SCI Cable 2023104 10 2 4 Receptor Board Block 2022614 1 2 5 Receptor Board Block Fixing Screw 1033122 100 3xs F Ni 3 Lamp Connect B Fixing Screw 1021824 100 3x8 F Zn 4 Inlet Board Fixing Screw 1021824 100 3x8 F Zn 5 Power Supply Unit Fixing Screw 1021824 100 3x8 F Zn 6 Interface Unit 1031100 1 6 1...

Page 96: ...8 Main Board Assembly 3001944 1 19 Main Board Fixing Screw 1033122 100 3x6 F Ni 20 Main Board Fixing Screw 1021823 100 3x12 F Zn 21 GND Cable Fixing Screw 1033025 100 4x6 F Ni 22 B To B Connector A 2023248 10 23 B To B Connector B 2023249 10 24 ROM 3002000 10 25 GND Plate 1033225 10 26 GND Plate Fixing Screw 1033122 100 3x6 F Ni 27 FG Mesh 2023824 10 28 Upper Case Unit 1031108 1 28 1 Upper Case 10...

Page 97: ...Label 1031070 10 43 Caution Label A Lamp Exchange 1031922 10 44 Caution Label B Never Look 1026335 10 45 Caution Label C Don t Open 1026265 10 46 Caution Label D 1031432 10 47 Road Service Sticker 1026940 10 48 Energy Star Label 1028991 10 49 Patent No Seal 7540540 10 50 User s Manual Set 4006222 10 51 Seal Set 1031075 10 52 AC Power Cable 2017328 10 53 AV Cable 2016048 10 54 Remote Control 103108...

Page 98: ...EPSON ELP 3500 Service Manual A 4 A 2 Exploded Diagrams Figure A 1 Exploded Diagram 1 ...

Page 99: ...EPSON ELP 3500 Service Manual A 5 Figure A 2 Exploded Diagram 2 ...

Page 100: ...EPSON ELP 3500 Service Manual A 7 A 3 Schematic Diagrams Figure A 3 Schematic Diagram 1 ...

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