Text preview for : pls1__s1_1.pdf part of EPSON PowerLite S1, S1+ Service Manual, Section 1:
Troubleshooting
Disassembly / Assembly
Back to : PowerLite S1 service manu | Home
Multimedia
Service Manual PowerLite® S1, S1+
®
Epson PowerLite S1 Series
Copyright Notice
All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the written permission of Epson America, Inc. Copyright © 2005 Epson America, Inc. 3840 Kilroy Airport Way Long Beach, CA 90806-2469
Trademark Information
EPSON, Epson PowerLite, and ESC/P are registered trademarks of SEIKO EPSON CORPORATION. Epson Connection is a service mark of Epson America, Inc. General Notice: Other product names used herein are for identification purposes only and may be trademarks of their respective companies. EPSON disclaims any and all rights in those marks.
FCC Compliance Statement
For American Users
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio and television reception. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause interference to radio and television reception, which can be determined by turning the equipment on and off, the user is encouraged to try to correct the interface by one or more of the following measures: Reorient or relocate the receiving antenna. Increase the separation between the equipment and receiver. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. Consult the dealer or an experienced radio/television technician for help.
Warning
The connection of a non-shielded equipment interface cable to this equipment will invalidate the FCC Certification of this device and may cause interference levels that exceed the limits established by the FCC for this equipment. It is the responsibility of the user to obtain and use a shielded equipment interface cable with this device. If this equipment has more than one interface connector, do not leave cables connected to unused interfaces. Changes or modifications not expressly approved by the manufacturer could void the user's authority to operate the equipment.
Preface
ii
Copyright Notice
Epson PowerLite S1 Series
For Canadian Users
This Class B digital apparatus meets all requirements of the Canadian Interface-Causing Equipment Regulations. Cet appareil numérique de classe B respecte toutes les exigences du Règlement sur le matériel brouilleur du Canada.
Precautions
Precautionary notations throughout the text are categorized relative to personal injury (WARNING), and damage to equipment (CAUTION).
W A R N IN G
Signals a precaution which, if ignored, could result in personal injury. Great caution should be exercised in performing procedures preceded by WARNING headings
C A U T IO N
Signals a precaution which, if ignored, could result in damage to equipment.
General Precautions
The precautionary measures itemized below should always be observed when performing repair and maintenance on this product.
W A R N IN G
Always disconnect the product from the power source and any peripheral devices before performing any maintenance or repair procedures. No work should be performed on the unit by persons unfamiliar with basic safety measures as dictated for all electronics technicians in their line of work. When performing testing as dictated within this manual, do not connect the unit to a power source until instructed to do so. When the power supply cable must be connected, use extreme caution in working on power supply and other electronic components. When disassembling or assembling a product, make sure to wear gloves to avoid injury from metal parts with sharp edges.
Preface
iii
Precautions
Epson PowerLite S1 Series
C A U T IO N
Repairs on Epson product should be performed only by an Epson Certified repair technician. Make certain that the source voltage is the same as the rated voltage, listed on the serial number/rating plate. If the Epson product has a primary AC rating different from available power source, do not connect it to the power source. Always verify that the Epson product has been disconnected from the power source before disconnecting any cables, or removing or replacing printed circuit boards and/or individual chips. In order to protect sensitive microprocessors and circuitry, use static discharge equipment, such as anti-static wrist straps, when accessing internal components. Do not replace malfunctioning components with components that are not manufactured by Epson. If second source IC or other components that have not been approved are used, they could cause damage to the Epson product, or could void the warranty offered by Epson.
About This Manual
This manual describes basic functions, theory of electrical and mechanical operations, maintenance, and repair procedures for the projector. The instructions and procedures included herein are intended for experienced repair technicians, and attention should be given to the precautions on the preceding page. Manual Configuration This manual consists of five chapters. Chapter 1. Product Specifications Describes the features and basic specifications of the product. Chapter 2. Theory of Operation Describes the electrical and mechanical basic operating principles of the product. Chapter 3. Troubleshooting Describes step-by-step procedures for troubleshooting. Chapter 4. Disassembly/Assembly Describes step-by-step procedures for disassembling and assembling the product. Chapter 5. After Service (AS) Menu Explains how to access the servicer-exclusive menus.
Preface
iv
About This Manual
Epson PowerLite S1 Series
Additional Symbols Used in this Manual Various symbols are used throughout this manual either to provide additional information on a specific topic or to warn of possible danger present during a procedure or an action. Be aware of all symbols when they are used, and always read CAUTION, and WARNING messages. Indicates a product reassembly procedure, practice or condition that must be executed in accordance with the specified standards to maintain the product's quality.
C H E C K P O IN T
May indicate an operating or maintenance procedure, practice or condition that is necessary to accomplish a task efficiently. It may also provide additional information that is related to a specific subject, or comment on the results achieved through a previous action.
Preface
v
About This Manual
Epson PowerLite S1 Series
Service memo Make notes of important technical information from Support Bulletins. For the latest Support Bulletins, go to www.epsonsinsider.com.
Preface
vi
About This Manual
Epson PowerLite S1 Series
Table of Contents
Chapter 1 Product Specifications
Product Features.......................................................................................................................2 Features of the Projector.....................................................................................................2 Components, Connectors and Switches ...................................................................................3 External Components..........................................................................................................3 Internal Components...........................................................................................................6 Remote Control ...................................................................................................................7 Specifications ............................................................................................................................8 Interface Specifications ...........................................................................................................11 Computer Interface, Monitor Out Interface........................................................................11 RS-232C ...........................................................................................................................12 Video Interface ..................................................................................................................12 S-Video Interface ..............................................................................................................12 Audio Input Interface .........................................................................................................13 External Views ........................................................................................................................14
Chapter 2 Theory of Operation
Hardware Overview.................................................................................................................16 Component Connection Diagram ......................................................................................17 Control Circuitry ................................................................................................................18 Optical Engine...................................................................................................................19 MA Board Assembly................................................................................................................22 MA Board Circuit Block .....................................................................................................23 Overview of Operation ......................................................................................................24 IF Board Assembly..................................................................................................................25 RC Board Assembly................................................................................................................26 LED Indicators.........................................................................................................................27 Power Supply Unit...................................................................................................................30 Power Supply Operation ...................................................................................................31 Ballast Unit ..............................................................................................................................33 Ballast Operating Principles ..............................................................................................34 Speaker...................................................................................................................................34 Temperature Control ...............................................................................................................35 Sensors and Switches.......................................................................................................35 Fan Operation .........................................................................................................................38
Chapter 3 Troubleshooting
Before Troubleshooting...........................................................................................................42 Troubleshooting Tools and Equipment .............................................................................42 Field Replacement Parts ...................................................................................................42 Safety Instructions...................................................................................................................43 Maintaining Operator Safety .............................................................................................43
Table of Contents vii
Epson PowerLite S1 Series Maintaining the Projector in Good Condition.....................................................................43 Safety Testing ...................................................................................................................44 Requirements for Service Technicians .............................................................................46 Start-up Sequence Troubleshooting .......................................................................................47 Detailed Troubleshooting ........................................................................................................50 Exterior Examination .........................................................................................................50 Image Display and Quality ................................................................................................52 Audio Output .....................................................................................................................53 Control Panel ....................................................................................................................53 Remote Control Operation ................................................................................................54 Internal Cable Check.........................................................................................................55 Miscellaneous ...................................................................................................................56
Chapter 4 Disassembly / Assembly
Overview .................................................................................................................................58 Precautions .......................................................................................................................58 Tools and Equipment ........................................................................................................60 Projector-Specific Service Precautions .............................................................................60 Projector Disassembly and Assembly.....................................................................................62 Removing the Lens Cap Unit ............................................................................................63 Removing the Lamp Inner Unit .........................................................................................64 Removing the Air Filter......................................................................................................65 Removing the Foot Units...................................................................................................65 Removing the Remote Control Holder ..............................................................................66 Removing the Upper Case................................................................................................67 Removing the Speaker......................................................................................................69 Removing the Switch (SW) Board Assembly ....................................................................71 Removing the Lamp Shield Plate......................................................................................72 Removing the MA Shield Plate .........................................................................................73 Removing the MA Board, IF Panel and IF Label...............................................................73 Removing the Main Board Fixing Plate.............................................................................77 Removing the IF Board Assembly.....................................................................................78 Removing the Exhaust Fan Assembly ..............................................................................79 Disassembling the Exhaust Fan Assy...............................................................................80 Removing the RC Board Assembly...................................................................................81 Left MA Frame, Lower Shield Plate Removal ...................................................................82 Removing the Power Supply / Ballast Assembly ..............................................................82 Removing the Ballast Assembly........................................................................................84 Removing the Power Supply Fan......................................................................................86 Removing the Optical Engine............................................................................................88 Removing the Focus Ring.................................................................................................89 Removing the Projection Lens Unit...................................................................................90 Removing the Intake Fan (Fan 100) .................................................................................91 Removing the Intake Duct and Right MA Frame...............................................................92 Removing the Lamp Cover Detection Switch....................................................................93 Removing the Handle........................................................................................................94 Removing the Rubber Foot ...............................................................................................95
Table of Contents viii
Epson PowerLite S1 Series
Chapter 5 After Service (AS) Menu
AS (After Service) Menu .........................................................................................................98 How To Display the AS (After Service) Menu. ..................................................................98
Table of Contents
ix
Chapter 1 Product Specifications
Epson PowerLite S1 Series
1.1 Product Features
The PowerLite S1/S1+ Multimedia Projector is a SVGA-compatible presentation tool developed to enlarge and project color images from personal computers and video equipment (VCRs, video cameras, DVD players, etc.).
1.1.1 Features of the Projector
Brilliant, Attractive Images The PowerLite S1/S1+ uses a large-diameter lens, and a high-luminance lamp, inner housing, and optical block. This allows the S1 and S1+ to display images at a brightness of up to 1200 lm and 1400 lm, respectively. Full-color, High-resolution Capabilities The projector has three transparent LCD panels (R, G and B), each with 480,000 pixels. The PowerLite S1/ S1+ can project images at resolution of up to 800 × 600. Quiet Operation Typical operating noise is only 33 dB. Functions for Enhancing Projection Easy to Operate The accessory remote control can be used for operations such as Freeze and E-Zoom. When the remote control is not used, it can be stored in the rear of the projector. Keystone correction Control Panel buttons easily correct image keystone distortion. Automatic setup When projecting a computer image, the projector detects the signal from the connected computer and automatically adjusts the image to the optimum projection quality. Color mode function The images can be optimized for the projecting environment by selecting from one of five preset display modes.
Product Specifications
2
Product Features
Epson PowerLite S1 Series
1.2 Components, Connectors and Switches
1.2.1 External Components
Speaker Control panel Remote control IR-receiving area
Air exhaust vent
Focus ring Handle
Lens cover
Foot unit
Figure 1-1. Front
Air filter
Mounting bracket attachment points (3 points)
Lamp cover
Handle
Figure 1-2. Bottom
Product Specifications 3 Components, Connectors and Switches
Epson PowerLite S1 Series
Remote control IR-receiving area Input and output connectors
Remote control holder
Security lock slot
AC Power inlet
Figure 1-3. Rear
S-Video port
Video port
Computer/ Component Video port
Monitor out port
S-Video
Video
Computer/ Component Video
Monitor Out
L-Audio-R
RS-232C
Audio-in port
RS-232C port
Figure 1-4. Input and Output Connectors
Product Specifications
4
Components, Connectors and Switches
Epson PowerLite S1 Series
l
[ ] [ ][ ][ ] Selection buttons Use the up/down button to select the item when the Configuration menu or Help is being displayed. Use the left/right button to adjust a value when the Configuration menu or Help is being displayed. [ ] [ ]: Keystone Correction buttons Press to correct keystone distortion in images.
[Wide] [Tele]: Zoom buttons Use to adjust the projection size.
[Power] button Turns the projector on and off. Power Status indicator Flashes or lights in different colors to indicate the operating status of the projector.
[Menu] button Displays or hides the configuration menus. [Source] button Switches the input source between the Computer/Component Video port, SVideo port and Video port each time the button is pressed.
Lamp Temperature indicator Flashes or lights in different colors to alert you to [ ] button problems with the projector. Accepts a menu item or advances to the next screen or menu when viewing configuration menus.
[Esc] button Stops the current function. Displays the previous screen or menu when viewing configuration menus.
Figure 1-5. Control Panel Functions
Product Specifications
5
Components, Connectors and Switches
Epson PowerLite S1 Series
1.2.2 Internal Components
Speaker Control panel Upper case unit
MA board assembly
Optical engine
Power supply unit Ballast unit
Exhaust fan
Intake fan
Lower case IF unit
IF panel
Figure 1-6. Major Internal Components
Product Specifications 6 Components, Connectors and Switches
Epson PowerLite S1 Series
1.2.3 Remote Control
Remote control IR emitter Outputs remote control signals.
[E-zoom] button [ ] Enlarges parts of images without changing the size of the projection area. [ ] Reduces the parts of images that have been enlarged using the [ ] button. [Source] buttons [Computer]: Switches to the signal source attached to the Computer/Component Video port. [S-Video/Video]: Switches between the signal source being input to the S-Video port and the Video port. [Aspect] button Changes the aspect ratio of images from 4:3 to 16:9. [ ][ ][ ][ ] buttons Select menu items and setting values.
[Power] button Turns the projector power on and off.
[Color Mode] button Selects the color mode. The color mode changes in the order of Dynamic, Presentation, Theatre, Living Room and sRGBg each time the button is pressed. [Esc] button Stops the current function. When viewing configuration menus, displays the previous screen or [Auto] button Use this button to automatically adjust computer images to their optimum settings when automatic setup has been set to "OFF". [Freeze] button Keeps the current computer or video image on the screen.
[Menu] button Displays or hides the on-screen configuration menus.
[A/V Mute] button Temporarily turns off the audio and video.
Figure 1-7. Remote Control
Product Specifications
7
Components, Connectors and Switches
Epson PowerLite S1 Series
1.3 Specifications
Projection System Projection Method LCD Size Driving Method Number of pixels Native resolution Aspect ratio Pixel arrangement Projection Lens Type F-number Focal length Zoom ratio Lamp Type Life (50% luminance) Optical System Screen Width Ratio (Distance/Width) Screen size (Projected Distance) Keystone correction ratio Brightness Contrast Brightness Uniformity Color reproduction Sound output Effective Scanning Frequency Range (Analog) Pixel Clock Horizontal Vertical
Product Specifications
RGB Liquid Crystal Shutter Projection System Front / Rear / Ceiling Mount 0.5 inches Poly-silicon TFT Active Matrix 480,000 (800 × 600 × 3) SVGA 4:3 Stripe Manual focus 1.4 16.6 mm No Optical Zoom Digital Zoom 1.0 to 1.2 S1: 132 W UHE S1+: 130 W UHE 2,000 hours typical Dichroic Mirror Separation and Prism combine Method 1.45 ~1.81 : 1 30 to 300 inches (0.9 to 11.3 m) 9.6 : 1 S1: 1200 ANSI lumens S1+: 1400 ANSI lumens S1: 400 : 1 S1+: 500 : 1 85% Typical 24 bit; 16.7 million colors 1 W Monaural
13.5MHz to 162MHz 15KHz to 92KHz 50Hz to 85Hz
8 Specifications
Epson PowerLite S1 Series
Adjustments Projector / Remote Control Tilt Angle Keystone Correction Analog RGB I/O Native Resolution Resized Resolutions Input Signal Type Video Signal Sync. Signal
Keystone (Vertical), Brightness, Contrast, Tint, Saturation, Sound, Input signal source, etc. 0 to 10 degrees Vertical: -15 to +15 degrees 800 x 600 1024 x 768 640 x 480 Separate signal Analog (0.7 Vp-p, 75 ohm; Mac 0.714 Vp-p, 75 ohm) Separate (positive & negative, bi-polarity 2-5 Vp-p)/ Composite (positive & negative, bi-polarity 2-5 Vp-p)/ Sync-on-green (negative, 0.3 Vp-p) 500 mVrms / 47 Kohm Mini D-sub 15-pin x1 RCA x 2 (White/Red) Non-analog-RGB standard level Mini D-sub 15-pin x1 Stereo mini jack NTSC: 550 lines, PAL: 550 lines (525 lines visible; 550 lines observable in the multi-burst pattern using a scope) NTSC, NTSC 4.43, PAL, M-PAL, N-PAL, PAL60, SECAM Composite Video: 1.0 Vp-p/ Sync. negative, 75ohm S-Video: Luminous 0.714 Vp-p, Chrominous 0.286 Vp-p, 75 ohm Component Video Analog Y level 0.7 V 75ohm, Cr Cb level +/-0.35 V, 75ohm, sync. negative 0.3 V or 3-state +/- 0.3 V on Y Video-RGB: 0.7 Vp-p, 75 ohm, Mac 0.714 Vp-p, 75 ohm 500 mVrms / 47Kohm Composite Video: RCA x 1 S-Video: Mini DIN Component Video: Mini D-sub 15-pin (in common with Analog RGB connector) Video-RGB: Mini D-sub 15-pin (in common with Analog RGB connector) RCA x 1
9 Specifications
Audio Signal Video Input Terminals Audio Input Terminals Output Signal Type Video Output Terminal Audio Output Terminal Video I/O Display Performance
Input Signal Video Standards Video Signal
Audio Signal Input Terminals Video
Audio
Product Specifications
Epson PowerLite S1 Series
Control I/O Terminal Operating Temperature Cool-down period Start-up period Power Supply Voltage/ Current 100 V Models 200 V Models Power Consumption Dimensions Feet retracted
One USB connector, Type B (for mouse or keyboard control) 41°F to 95°F (5°C to 35°C) Approximately 20 seconds Approximately 40 seconds
100-120 V ±10%, 50/60 Hz AC, 2.7 A 200-240 V ±10%, 50/60 Hz AC, 1.3 A S1: 180 W (5 W in Standby mode) S1+: 200 W (5 W in Standby mode) 10.4 (D) x 14.6 (W) x 4.2 (H) inches 265 (D) x 370 (W) x 106 (H) mm 10.4 (D) x 14.6 (W) x 4.5 (H) inches 265 (D) x 370 (W) x 114 (H) mm Approximately 7 lbs / 3.2 kg 33 dB 1.8 m 1.8 m, Mini D-sub 15-pin (Male) - Mini D-sub 15-pin (Male) Not included Not included Card type Included Included 1 filter installed, and 1 replacement filter bundled.
Feet extended Weight Fan Noise Accessories Power cord Computer cable Audio cable Mouse cable Remote Control EPSON Presentation Remote Control Kit Soft Carrying Bag Air filter
Product Specifications
10
Specifications
Epson PowerLite S1 Series
1.4 Interface Specifications
S-Video
Video
Computer/ Component Video
Monitor Out
L-Audio-R
RS-232C
Figure 1-8. Interface Panel
1.4.1 Computer Interface, Monitor Out Interface
HD D-sub, 15-pin CN100: Computer Interface 7513S-15G2-08 CN102: Monitor-Out Interface 7513S-15G2
11 6 1 15 10 5
Pin No. Pin Name
Pin No.
Pin Name
1 2 3 4 5
Red video signal Green video signal Blue video signal GND GND
9 (None) 10 11 12 13
6 7 8
GND GND GND
14 15
(No pin) Sync GND GND SDA Horizontal sync/ composite sync signal Vertical sync SCL
Product Specifications
11
Interface Specifications
Epson PowerLite S1 Series
1.4.2 RS-232C
D-Sub, 9-Pin CN3000 7511P-09G2
1 6 5 9
Pin No.
Signal name
1 2 3 4 5 6 7 8 9
CD RXD (Receive Data) TXD (Transmit Data) DTR GND DSR RTS (Request To Send) CTS (Clear To Send) RI
1.4.3 Video Interface
CVBS (Yellow) J200 HTJ-032-05BY CVBS (Yellow)
1
Pin No.
Signal name
1 2
DGND
GND CVBS
1.4.4 S-Video Interface
4-Pin CN200 TCN7708-012021
4 2 3 1
2
Pin No.
Signal name
6
5
1, 2, 6 3 4 5
GND Y signal input C signal input Input detect pin
Product Specifications
12
Interface Specifications
Epson PowerLite S1 Series
1.4.5 Audio Input Interface
CN200: Audio Input (S-Video, BNC Interface) HTP-252V1-06
4
L (White)
3
Pin No.
Signal name
R (Red)
1, 3 2 4
DGND
GND Audio input R Audio input L
Product Specifications
1
2
13
Interface Specifications
Epson PowerLite S1 Series
1.5 External Views
369
58
104.4
42.3 11.1
87.6
264.7
1
108.6
76.6
62.4
18.3
5.5
58.9
170.
41
115 12.6
127 M4x8-3
80
88.5
114
84.5
124
13.9 369
65.1
73.9
106.5 25 18.2 80.1
14.4
133.1
15.6
Figure 1-9. External Dimensions (mm)
Product Specifications 14 External Views
42
44.5
28
79.5
92
Chapter 2 Theory of Operation
Epson PowerLite S1 Series
2.1 Hardware Overview
The hardware for the PowerLite S1/S1+ is divided into two functional sections: the Optical Engine and the circuit system. This section of the manual describes functions of the major hardware components.
Figure 2-1. Functional Components Overview Of Display Operation 1. The MA Board receives RGB/Component signals from the Computer/Component Video interface and video signals from the Video/S-Video interface. Analog signals are converted to digital signals by the MA Board. 2. The digital display signals are temporarily stored in video memory on the MA Board, from which the driver circuitry generates signals to drive the R, G and B light valves. 3. The R, G and B light valves control the amount of light of each color, and its location. 4. The light that passes through the light valves is combined by the prism and projected as an image through the projection lens unit.
Theory of Operation
16
Hardware Overview
Epson PowerLite S1 Series
2.1.1 Component Connection Diagram
The connectors for the components and Main (MA) board are shown in the following diagram.
RC Board (F) Speaker CN1 2-pin 3-pin
CN1701 CN603
CN1500 Green CN704 Fan 100 3-pin CN702 CN1600 Red CN1400 Blue CN601
Fan 80 3-pin
2-pin
Lamp Cover Detection Switch
CN701
4-pin L a m p Thermistor
MA Board
CN1800 34-pin Power Supply Lamp
2-pin Control 24-pin Panel CN400 CN602 CN600
5-pin
Ballast
S-Video In CN300
Audio In J200
BNC In CN100
PC Out CN102
24-pin
CN3002
IF Board
Remote Control Sensor IC3000
Audio Out CN3001
RS-232C CN3000
Figure 2-2. MA Board Connector Block Diagram
Theory of Operation
17
Hardware Overview
PC/VIDEO I/F Monitor Out
Panel Driver Block
MA Board
Level Shifter DEC Driver Driver ASIC
RGB
AMP
DDC EEPROM ADC
3ch Video Amp. 3ch ADC Sync.Sep.
PC
Image Processor AMP
LCCOM Video SW
DDC
Serial DAC
DEC Driver
DEC Driver
Epson PowerLite S1 Series
Theory of Operation
AMP
NRS
Sync
Logic
DSUB15
2.1.2 Control Circuitry
RGB
Sync
Sync Corrector
G PORT
Main CPU Frame Memory Resizing Frame Rate Conversion Color Space Conversion OSD
DSUB15 Serial DAC/ADC
Video
Thermistor
3RCA
SCART(SYNC)
CVBS
Chroma
V PORT
RCA I2C INT UART
CS/WR/RD
Fan Driver
Y/C
DIN4
The control circuits are illustrated in the following block diagram.
Figure 2-3. Circuit Block Diagram
Audio Controller
Vol Controller
16 Mbit
18
FLASH ROM SRAM
1 Mbit
Audio
RCAx2
CS/WR/RD
COM Port
RS Driver
UART
D-Sub9
I/F Controller Memory Control KeyScan Download PSCI
Power Supply Circuit
LAMP STATUS POWER ON/OFF
Power Supply
Lamp Ballast
Speaker
Button Matrix
LED
IR
AC In
Hardware Overview
HUMAN I/F
Epson PowerLite S1 Series
2.1.3 Optical Engine
The Optical Engine consists of three components: the Lamp Inner Unit, the Light Guide Unit, the Panelon-Prism (POP) Unit, and the Projection Lens comprise the Optical Engine. The Projection Lens is available separately as a service part.
Projection Lens
POP unit Lamp Inner Unit
Light Guide Unit
Figure 2-4. Optical Engine
Red Light Valve Lamp Inner Unit (Light Source) Green Light Valve Blue Light Valve Light Guide Unit Prism (R/G/B Integration)
Projection Lens
Ballast Power Supply
MA Board
Figure 2-5. Optical Engine Functional Diagram
C H E C K P O IN T
The Optical Engine and Main (MA) Board are paired together as a single service part. Neither is available separately. For service that requires the replacement of either the MA Board or the Optical Engine, both components must be replaced together.
19 Hardware Overview
Theory of Operation
Epson PowerLite S1 Series
C A U T IO N
Do not subject the optical system components to physical shocks or strong vibration. Except for removal of the Projection Lens, do not disassemble the Optical Engine. Disassembly will cause color distortion, even if reassembled very carefully. The adjustment data used to compensate for individual component characteristics is stored on the MA Board. Each component is adjusted at the factory for installation in its particular position. Do not replace any of the individual components with components from other optical engines.
Table 2-1. Optical Engine Component Functions
Component Name Function/Other
Lamp Inner Unit Light Guide Unit
POP Unit
Projection Lens
Light source for projecting an image. The light guide unit disperses the light from the Lamp via two lens arrays in order to provide uniform illumination. In addition, a UV filter protects the LCDs from harmful ultraviolet light. After this light is polarized, it is then split into 3 spectrums (R, G and B). The Panel-on-Prism (POP) Unit incorporates the Light Valves and controls the intensity of the distributed components of the RGB light. The prism unit then integrates the RGB light and sends it through the projection lens. The image combined by the prism is projected through the Projection Lens.
Lamp Inner Unit The Lamp Inner Unit is comprised of the Lamp (UHE-132W in the S1, and UHE-130W in the S1+) and the Ballast Power Supply Connector, which supplies the AC voltage to drive the Lamp. The lamp is fastened to the bottom of the projector body with 2 screws. The lamp is a consumable part, and is to be replaced as luminance declines over time as the lamp is used. Maximum luminance is obtained when a new lamp is first installed. After approximately 2,000 hours of use the luminance will drop by approximately 50%.
Theory of Operation
20
Hardware Overview
Epson PowerLite S1 Series
The Lamp may be replaced at any time. Replace the Lamp Inner Unit before the full 2000-hour period has been reached if it seems that the luminance of the lamp is unacceptable during actual use.
Ballast Power Supply Connector
Figure 2-6. Power Supply Ballast The cumulative operating time for the lamp inner unit is stored in IC403 (I/F Controller) on the MA Board. When the lamp is replaced, the lamp timer should be reset. Use the Reset Lamp Timer function in the About menu to reset the lamp timer. The Lamp Inner Unit control circuit is illustrated in Figure 2-7.
MA board LED
IC403 (IF-Controller)
Power supply ON/OFF Power cut detection Fan control CN602 Ballast output ON/OFF Blown lamp detection Lamp Inner unit Ballast unit Power Supply unit CN1800
Figure 2-7. Lamp Inner Unit Control Circuits The PowerLite S1/S1+ has a sleep mode function that will automatically turn off the lamp if no new signals are input during a user-selectable period: 5 minutes, 10 minutes or 30 minutes.
Theory of Operation
21
Hardware Overview
Epson PowerLite S1 Series
2.2 MA Board Assembly
The MA Board processes the core circuit controls for the projector, including interface control, operation panel control, temperature sensor circuit and fan control, ballast power supply control and the infrared Remote Control (RC) Board interface. The MA Board also contains an imaging processor (PW465), Flash ROM, EEPROM, digitizers (ADC and video decoder), and SRAM memory. The MA Board carries out all control operations except for display signal generation and audio control. The MA Board and its matched Optical Engine are regarded as a single unit for servicing purposes.
Projector Front
MA Board Top
Projector Front
MA Board Bottom
Figure 2-8. MA Board Top and Bottom View
C A U T IO N
The S1 and S1+ use different MA Boards, and the boards are not interchangeable. Remember that the MA Board and Optical Engine have to be replaced as matched pairs and are not available separately as service parts.
22 MA Board Assembly
Theory of Operation
Lamp Thermistor Fan 80 Fan 100
CN702 CN704 CN701
Epson PowerLite S1 Series
Theory of Operation
LED Control IC701 Serial DAC DEC Driver
Light Valve
Remote Control IR Receptor (Front)
IC1
2.2.1 MA Board Circuit Block
Remote Control IR Receptor (Rear)
IC300 PW164B IC403 IFCPU
IC301 IC303 R/G/B DO [9 0]
IC1100
IC1400
R SVGA
IC1200
IC3000
Control Panel
IC901 GAUGE4
R/G/B OUT [9 0]
G SVGA
IC1300 IC1600
CN400
Frame Memory Resizing Frame Rate Conversion Color Space Conversion OSD
B SVGA
Vol Control
Figure 2-9. MA Board Unit Circuit Block Diagram
Ballast Unit
CN602
23
Lamp Cover Detection Switch
12C
IC404 RS Driver IC403 Chroma
IC105 PIGMON
IC105 PIGMON
RC-232C
CN1800
Power Supply unit
CN601
IC1701 Audio Controller
CN3000
IC100 ADC
Speaker Audio
CN3001 CN2901
S-Video
CN300
Video
J300
Computer/ Component Video
CN100
Monitor out
CN102
MA Board Assembly
Epson PowerLite S1 Series
2.2.2 Overview of Operation
Digitalization control of the picture signal Converts the analog RGB image signals from the Computer/Component, and Video connectors to digital form. Image Resolution and Definition control Converts the resolution of the Video and S-Video input signals using a digital filter. Frequency transformation control Transforms the picture signal into the appropriate signals to drive the R, G and B LCD panels. On screen display Displays the menu, EMP link function, and other information overlaid onto the input picture signal. Remote control Receives and decodes IR signals from the remote control and supplies control signals to various MA Board circuits Lamp control Controls the ballast and lamp illumination. LED control Controls the display characteristics of the Lamp Temperature and Power status indicator LEDs. Cooling control Measures temperature and controls the speed of the fans. Power supply control Controls low-power consumption, sleep and stand-by modes.
Theory of Operation
24
MA Board Assembly
Epson PowerLite S1 Series
2.3 IF Board Assembly
This circuit board includes interface connectors and audio control circuits for video equipment and computer audio signal sources. The IF Board is equipped with the following connectors.
Composite S-Video Port Video Port Computer/ Component Video Port Monitor Out Port
S-Video
Video
Computer/ Component Video
Monitor Out
L-Audio-R
RS-232C
Audio In Port
RS-232C Port
Figure 2-10. IF Board External Connectors
.
CN100
S-Video
CN200 IC1701 CN3002
CN3001
Audio in
Video
J200
Audio Controller
Monitor out
CN102
To CN600 on MA board
Figure 2-11. IF Board Block Diagram The audio inputs from the DVI, computer, video and BNC connectors enter the audio controller (IC1701) and are then amplified. The signal is then output either to the external speakers connected to the Audio Out connector or to the built-in speaker. The audio controller selects the audio signal output based on the SCL/ SDA (serial data/clock) signal supplied from the MA Board. The sound volume controller adjusts the volume in 20 steps (mute to maximum) based on a signal from the MA Board.
Theory of Operation
25
IF Board Assembly
Epson PowerLite S1 Series
2.4 RC Board Assembly
The projector is equipped with two Remote Control (RC) infrared sensors that detect (receive) infrared signals transmitted from the remote control. The sensors are located on the front and rear of the projector.
IF Board Assembly Front IR Receiver Sensor Rear IR Receiver Sensor
Figure 2-12. RC Receiver Sensor The Remote Control serial data signals are received by the sensors and sent to IC403 (IF-CPU) on the MA Board. The MA Board uses the serial data to control the power On/Off, menu start, and control the display (temporary stop, blank, etc.). Audio-related signals are passed through to the IF Board to control muting, adjust the tone, and adjust the volume.
MA board (Front) Infrared Signal IR Receiver1
CN603 IC403
Remote Control
IR Receiver2 (Rear)
IC3000
Figure 2-13. Remote Control Block Diagram
Theory of Operation
26
RC Board Assembly
Epson PowerLite S1 Series
2.5 LED Indicators
The MA Board uses three LEDs on the Control Panel to indicate the operating status of the projector.
Power Status Indicator
Lamp Temperature Indicator
Figure 2-14. LED Location The following tables show what the indicators mean and how to remedy the problem indicated. Table 2-2. Power Status Indicator LED On Blink
Power Status Indicator Projector Status Problem and Remedy
Steady Orange
Standby condition
Normal operation. The power cable should only be disconnected when the projector is in this state. Press the [Power] button to start projection. Normal operation. Do not disconnect the power cord. Wait until cooldown is complete before disconnecting the power cord. The cool-down time is typically 20 seconds, but varies depending on the ambient air temperature, humidity, and airflow through the projector. During cool-down, the [Power] button on the remote control and projector are deactivated until cool-down is over and the LED has turned to Steady Orange. Normal operation.
Flashing Orange
Cool-down in progress
Steady Green
Projection in progress
Theory of Operation
27
LED Indicators
Epson PowerLite S1 Series
Power Status Indicator
Projector Status
Problem and Remedy
Flashing Green
Warm-up in progress
Normal operation. The projector is warming up and attempting to strike the lamp. The warm-up time should be a maximum of 40 seconds. After warm-up, the indicator will turn from flashing green to steady green.
On
Blink
Indicator Status Projector Status
Table 2-3. Warning Indicator
Problem and Remedy
Steady Red
Internal temperature too high
The lamp turns off automatically and projection stops. Wait for at least 5 minutes, then unplug the power cable and check the following: Make sure the air filter and ventilation outlet are clear and that the projector is not positioned against a wall. If the air filter is dirty, it should be cleaned. When the power cable is plugged back in, the projector will return to its previous state. Press the [Power] button on the projector or on the remote control to turn it back on. Check that the lamp and lamp cover are securely installed. If the lamp or lamp cover are not securely installed, the lamp will not switch on. Disconnect the power cable from the electrical outlet. Remove the lamp and check that it is not broken. If the lamp is not broken, re-install it and reconnect the power cable. Press the [Power] button on the Control Panel or the Remote Control to turn the projector back on. Replace the lamp if it is broken. You will not be able to use the projector until the lamp is replaced.
Rapid Flashing Red
Lamp problem
(0.5 second interval)
Slow Flashing Red
Internal problem
Stop using the projector. Proceed to Chapter 3, "Miscellaneous" on page 56.
(1 second interval)
Theory of Operation
28
LED Indicators
Epson PowerLite S1 Series
Indicator Status
Projector Status
Problem and Remedy
Flashing Orange
High-speed cooling in progress
This is not abnormal, but if the temperature rises too high, projection will stop automatically. Make sure the projector is operated in a well ventilated location and ensure the air filter and ventilation outlet are clear. Clean the air filter.
Theory of Operation
29
LED Indicators
Epson PowerLite S1 Series
2.6 Power Supply Unit
The Power Supply Unit contains the power supply, power supply filter and power supply fan. It also includes the AC cord socket, filter circuit and fuse.
Power Supply
Power Supply Fan
Figure 2-15. Power Supply Unit
Fuse AC input 100-120 VAC 200-240 VAC AC inlet Safety switch EMI / Power supply filter
Connected to Ballast unit
Power supply DC output to connecter to CN1800 on MA board
Figure 2-16. Power Supply Circuit Block Diagram
Theory of Operation
30
Power Supply Unit
Epson PowerLite S1 Series
2.6.1 Power Supply Operation
A cooling fan extracts the heat generated inside the power supply unit. The heated air is removed from the projector by the Exhaust Fan, Fan 80. The fuse protects the power supply and internal circuitry from over-current on the AC supply line. The EMI filter/regulator circuit eliminates interference (noise) from the AC line and generates the DC voltage for the regulators. The output cable of the power supply unit is connected to connector CN1800 on the MA Board, and provides the following voltages and signals: DC output FANCTL controls the Power Supply cooling fan. PWON is the Power Supply On/Off signal,
17 34
1
18
Figure 2-17. Connector CN1800 Pin Layout Table 2-4. Connector CN1800 Pinout Definition
Pin Signal No. Name Pin No. Signal Name Pin No. Signal Name Pin No. Signal Name
1 2 3 4 5 6 7 8 9
PWON +13 V GND +18 V GND +3.3 V.T. GND +3.3 R +3.3 R
10 11 12 13 14 15 16 17 18
GND +7 V GND -7 V GND +5 V GND +12 V FANCTL[0]
19 20 21 22 23 24 25 26 27
+13 V GND +18 V FANCTL[1] +3.3 V.T. GND +3.3 R +3.3 R GND
28 29 30 31 32 33 34
+7 V GND -7 V GND +5 V GND +12 V
Theory of Operation
31
Power Supply Unit
Epson PowerLite S1 Series
The DC voltages shown in the tables below are generated by a Switching Regulator. No fluctuations in output potential occur as a result of load fluctuations, and the individual output voltages cannot be adjusted.
C A U T IO N
Background power is still supplied to the MA Board through connector CN1800 as long as the power cord is connected to the projector, even if the [Power] switch is turned off.
.
Table 2-5. S1 Electrical Circuit Specifications
Nominal Voltage Rated Voltage Rated Current (Rated Power) Output Current (Output Power) Min.------- Max Protection Circuit Ripple Ripple + Spike Overcurrent Overvoltage Load Capacitance
100 V
+3.3T +5T +18T +8V +12V
BALLAST
+3.3V +5V +18V +8V +13V 255V +3.3V +5V +18V +8V +13V 295V
1.5A 1.0A 0.25A 0.1A 0.5A 155W 1.5A 1.0A 0.25A 0.1A 0.5A 155W
0.2A 0.02A 0.2A 0.02A 0.2A 0W 0.2A 0.02A 0.2A 0.02A 0.2A 0W
1.5A 1.0A 0.25A 0.1A 0.5A 165W 1.5A 1.0A 0.25A 0.1A 0.5A 165W
100mvpp 100mvpp 400mvpp 100mvpp 200mvpp 25Vpp 100mvpp 100mvpp 400mvpp 100mvpp 200mvpp 25Vpp
200mvpp 200mvpp 400mvpp 200mvpp 300mvpp 25Vpp 200mvpp 200mvpp 400mvpp 200mvpp 300mvpp 25Vpp
Interrupt Interrupt Interrupt Interrupt Interrupt Interrupt Interrupt Interrupt Interrupt Interrupt -
+3.4V +5.2V +23V +11V +16V +400V +3.4V +5.2V +23V +11V +16V +400V
100µF 200µF 47µF 200µF 600µF 100µF 200µF 47µF 200µF 600µF -
200 V
+3.3T +5T +18T +8V +12V
BALLAST
Table 2-6. S1+ Electrical Circuit Specifications
Nominal Voltage Rated Voltage Rated Current (Rated power) Output Current (Output Power) Min. ------- Max. Protection Ripple Ripple + Spike Overcurrent Circuit Overvoltage Load Capacitance
+3.3T +5T +18T +8V +12V
BALLAST
+3.3V +5V +18V +8V +13V 255V
2.0A 1.0A 0.25A 0.1A 0.5A 155W
0.2A 0.02 A 0.2A 0.02 A 0.2A 1W
2.0A 1.0A 0.25A 0.1A 0.5A 160W
100mvpp 100mvpp 400mvpp 100mvpp 200mvpp 25Vpp
200mvpp 200mvpp 400mvpp 200mvpp 300mvpp 25Vpp
Interrupt Interrupt Interrupt -
+4.6V +7V +410V
100µF 200µF 47µF 200µF 600µF -
Theory of Operation
32
Power Supply Unit
Epson PowerLite S1 Series
2.7 Ballast Unit
The ballast unit uses a switching regulator to re-regulate the ballast DC power supply (220-400 VDC) that comes from the power supply unit to generate the AC power supply 132 W for the UHE lamp.
SCI cable Connects to CN1800 on MA Board
Ballast output connector Connects to Lamp Inner Unit
Figure 2-18. Ballast Unit
Connects to power supply unit HV DC input 220-400 V Down converter Full bridge Igniter circuit LV Ballast output 132 W
Control circuit
SCI cable: Connects to MA board connector CN701
Figure 2-19. Ballast Block Diagram
Theory of Operation
33
Ballast Unit
Epson PowerLite S1 Series
2.7.1 Ballast Operating Principles
· Control circuit: Generates the voltages (220-400 VDC) for the control circuit inside the ballast unit. Re-regulation switching operations carried out based on the MA Board output signal. The output voltage is adjusted to stabilize the output of the power supply. · Igniter circuit: Generates the 132 W lamp voltage.
2.8 Speaker
The projector has a single 1 W built-in speaker at the front of the projector facing upward. It provides monaural output of the sound signal supplied to the projector from a host computer or video source.
Speaker
Figure 2-20. Speaker Location
MA board
IC201
Audio In
CN3001
Audio Controller
CN1701
S P
Control signal
Volume Control
Figure 2-21. Speaker Control Circuit Block Diagram The signal from the computer or video source is amplified by the audio control circuits on the MA Board and then output to the built-in speaker through connector CN1701.
Theory of Operation 34 Speaker
Epson PowerLite S1 Series
2.9 Temperature Control
2.9.1 Sensors and Switches
The devices shown in the table below help to protect the safety of the operator and prevent abnormalities in operation. Table 2-7. Temperature Switches and Sensors
Sensor/Switch Location Function
Lamp Cover Detection Switch
Inside the base of the projector
Thermal Safety Switch
Lamp Guide unit in the Optical Engine
Lamp Thermistor
Lamp Guide unit in the Optical Engine
Interrupts AC power when the lamp cover is opened. Power cannot be turned on until the lid is closed. Prevents overheating around the lamp inner unit. Interrupts AC power if the temperature rises above a certain level. Prevents overheating around the lamp inner unit. Provides input for fan-speed control. Turns off the lamp if the temperature rises above a certain level.
Lamp Cover Detection Switch This switch is connected to the lamp cover latch on the inside base of the projector, and prevents current from going to the lamp if the lamp cover is open. This lid is normally only opened when the operator is replacing the lamp inner unit, and the switch is provided in order to help prevent injury from burns that could occur if the lamp turned on accidentally during replacement. The lamp cover detection switch is connected to CN601 on the MA Board. When the lamp cover opens, IC403 (IFCPU) detects the LAMP_COVER_OPEN signal and sends the LAMP_OFF signal to turn off the lamp.
Lamp Cover Detection Switch
Figure 2-22. Lamp Cover Detection Switch
Theory of Operation 35 Temperature Control
Epson PowerLite S1 Series
Safety Switch This is a backup overheating prevention switch mounted on the upper face of the light guide unit. If overheating occurs around the lamp inner unit due to problems with the exhaust fan, the lamp is normally turned off by the Lamp Thermistor to prevent overheating. The Safety Switch is provided as a backup in case the Lamp Thermistor and temperature detection circuit fail simultaneously.
Safety switch
Figure 2-23. Safety Switch Location When the temperature rises above a given level, the safety switch interrupts AC power to stop all regular operations. Once the safety switch is activated, power cannot be switched on again until the temperature falls below the given level.
Theory of Operation
36
Temperature Control
Epson PowerLite S1 Series
Lamp Thermistor The Lamp Thermistor is attached to the exhaust fan to detect the temperature of the lamp section. To prevent damage to the surrounding components from overheating, IC300 (PW164B) on the MA Board first provides a warning indication through the Lamp Temperature LED, or stops the output of the ballast when the temperature rises above a given level.
Lamp Thermistor
Figure 2-24. Lamp Thermistor Location Thermistor and Temperature Sensor Operation IC300 (PW164B) on the MA Board samples the temperatures of the Optical Engine and Power Supply areas at intervals of 1 second by means of the Lamp Thermistor. IC300 uses these measurements to manage fan operations and power supply shutdown operations as necessary. See Section 2.10 on page 38 for more information on fan operation, and Section 2.5 on page 27 for more information on the LED status indicators. Table 2-8. Temperature Sensors and Lamp Temperature Status
Condition Lamp Temperature LED Meaning
Normal temperature High temperature warning Abnormally high temperature
Off Normal operation in progress Flashes orange If temperature rises any higher, projection stops. Steady red Overheating; projection stops. Flashes red Problem with fans, Thermistor or temperature detection circuit
Theory of Operation
37
Temperature Control
Epson PowerLite S1 Series
2.10 Fan Operation
There are three cooling fans inside the projector. These fans discharge air heated by the Lamp Inner Unit, Power Supply Unit, and Ballast Unit.
Exhaust Fan (Fan 80)
Figure 2-25. Exhaust Fan (Fan 80)
Intake Fan (Fan 100)
Figure 2-26. Intake Fan (Fan 100)
Theory of Operation
38
Fan Operation
Epson PowerLite S1 Series
Power Supply Fan
Figure 2-27. Power Supply Fan
Fan 100 Intake Fan
LV-FAN0 LV-FANDET0 SCL SDA
PW
PW164B
DAC
ADT7518
PORTA1 PORTA0
SCL SDA
Vout-A Vout-B
Exhaust Fan
EX-FV0 EX-FANDET0
Fan 80 PSCI
BGH14 FANDET0 FANDET1
BGH15
Figure 2-28. Fan Control Circuit Block Diagram Fan Operation and Control The MA Board is connected to the Lamp Thermistor. When the lamp is on, Fan 100 (Intake Fan) and Fan 80 (Exhaust Fan) speeds are adjusted according to preset temperature limits detected by the Lamp Thermistor. When the lamp is turned off, the fans continue to operate for approximately 20 seconds to ensure sufficient cool-down of the projector. Feedback signals from the fans are used by the CPU to monitor fan operation (stopped or running) for any abnormalities. If the feedback signal indicates a condition that the CPU does not expect, the CPU immediately turns off the lamp and causes the Lamp Temperature LED indicator to light red. The fan at the power supply unit operates at high speed or low speed based on the signal that is generated by IC902 (IFCPU) on the MA Board.
Theory of Operation 39 Fan Operation
Epson PowerLite S1 Series
Theory of Operation
40
Fan Operation
Chapter 3 Troubleshooting
Epson PowerLite S1 Series
3.1 Before Troubleshooting
If you have replaced parts or components as part of a repair procedure, always be sure to re-check whether any parts previously replaced are themselves operating correctly. Determine whether the problem is the result of a malfunctioning replacement part, an incorrectly installed part, or a loose cable. Follow all troubleshooting instructions and procedures as written. Follow the procedures given in Chapter 4 - Disassembly and Assembly - when replacing any projector parts or components. If you find problems when checking the operation of the projector, always check the external cable connections before proceeding to other checks. After the projector has been unplugged and cooled, check the internal cable connections. In order to confirm proper operation, use AC power from a known, clean source and use a power cable in good condition.
3.1.1 Troubleshooting Tools and Equipment
Check that the following tools are on hand before you begin troubleshooting. Table 3-1. Troubleshooting Tools and Equipment
Name Quantity. Application
Projection screen Tape measure (10 ft.) Host computer Video equipment Multimeter External speaker Heat-resistant tape General tools
1 1 1 1 1 1 1 foot 1 set
Projecting images Measuring projection distances Transmitting audio and image data Transmitting audio and image data Measuring resistance values and voltages (AC/DC) Testing audio output (with audio cable connector) Attaching parts Tools and equipment listed in Chapter 4 Section 4.1.
3.1.2 Field Replacement Parts
C A U T IO N
The Optical Engine and MA Board are configured and adjusted together at the factory. They are only available as a matched pair, and must always be replaced together when either the Optical Engine or MA Board has a failure. Many of the components that comprise a service unit have each been adjusted in relation to each other. Therefore, when replacing parts during troubleshooting or repair, do not disassemble service units in order to harvest and use constituent components. This is especially critical for the components in the optical engine (Light Guide Unit, Prism Unit and Light Valves) and the MA Board. Perform safety tests after replacing any parts. See Section 3.2.3 on page 44.
C H E C K P O IN T
Troubleshooting
42
Before Troubleshooting
Epson PowerLite S1 Series
3.2 Safety Instructions
3.2.1 Maintaining Operator Safety
Prevent Electric Shocks Turn off the power switch and disconnect the power cord from the AC outlet before performing any disassembly and assembly work on this projector. If power needs to be supplied to the projector while the cover is removed (such as when making adjustments), remove all metallic objects such as wristwatches, shirt cuff buttons, rings and tie pins which may pose the danger of coming into contact with the projector. Prevent Injury Projector components such as the Lamp Inner Housing and the area around it will remain hot after the power has been turned off, even when the cool-down period is compete. If removing the cover in order to carry out procedures while power is being supplied to the projector, be careful not to touch the intake and exhaust fans. Always wear gloves when disassembling and reassembling the projector in order to avoid injury from metallic parts with sharp edges. Do not look directly into the projector's lens while power is being supplied to the projector, otherwise injury to the eyes may occur. Prevent Accidents Place the projector on a stable, level surface when carrying out any repair or adjustment work. Do not place any tools or projector components on top of or underneath the projector. Always use the supplied Epson power cord to connect the projector to an AC outlet, and make sure that the AC outlet is properly grounded.
3.2.2 Maintaining the Projector in Good Condition
Preventing Static Electrical Damage When disassembling and assembling the projector, always use a grounding strap and a grounding mat. When replacing electrical circuit components such as circuit boards and optical engine, touch the staticproof bag containing the new parts against a metallic section of the projector before removing the component from the static-proof bag. During disassembly, temporarily store any electrical circuit parts you have removed in static-proof bags. Use of Genuine Parts When replacing the structural components inside the projector, including the Lamp Inner Housing, use only replacement parts supplied by Epson and listed in the projector's Parts List. Use the power cord and video interface cable provided with the projector.
Troubleshooting
43
Safety Instructions
Epson PowerLite S1 Series
3.2.3 Safety Testing
Perform the following tests after you repair the projector. Insulation resistance test Illumination check Insulation resistance test
1. Set the range selection switch to 500 V.
W A R N IN G
High voltage (500 V) is 2. Connect the black lead wire to the ground terminal. present. Make sure the pro3. Connect the red lead wire to the line terminal. jector is turned off and unplugged. Do not touch the 4. Connect the black lead wire (crocodile clip) to c in order to measure the insulation resistance (1) probe during testing.
5. 6.
Ground terminal
Line terminal Display
7. 8.
9.
(between a and c) in the diagram below. Next, insert the probe of the red lead wire into a. Set the measure switch to LOCK, and then measure the insulation resistance for 1 minute. Check that the insulation resistance after 1 minute is 10 M or more. Next, measure the insulation resistance at (2) (between b and c) in the diagram below in the same way as for (1). Check that the insulation resistance at (2) after 1 minute is 10 M or more.
Projector AC inlet
Measure Switch
a
Power supply lines
Range Selection Switch
b
(1)
(2)
Exposed metal on the projector
c
VGA (Computer) connector
Troubleshooting
44
Safety Instructions
Epson PowerLite S1 Series
Illumination safety check Connect a Computer or Video signal to the projector and check the illumination for at least 5 minutes. Verify that there is no abnormal odor or smoke. Additional safety checks and precautions Check that the connectors at both ends of the power cord are not dirty or bent, and clean them if they are dirty. Visually inspect the power cord. Replace the power cord if there is any noticeable discoloration. When you connect cables inside the projector, push the cables into the connectors as far as they will go and make sure that the cables are fully seated in the connectors. If the connector is a locking connector, make sure the connector is unlocked before attempting to seat the cable. To prevent problems caused by dirt getting into the optical system, always disassemble and assemble the projector in an area which is free from floating dust. When disconnecting the cables connected to CN400 and CN600 of the MA Board, remember to release the connector locks. To release the connector lock, push up both ends of the connector simultaneously with tweezers or small pliers.
CN600 (underneath) CN400
Enlarged view
Locked
Unlocked
Release the connector locks before you disconnect the three light valve cables from their connectors.
Locked
connector lock
Unlocked
Troubleshooting
45
Safety Instructions
Epson PowerLite S1 Series
3.2.4 Requirements for Service Technicians
Service technicians who perform repair work on the PowerLite S1/S1+ must possess the following knowledge and abilities. They must have read and fully understood the contents of this Service Manual. They must have a fundamental knowledge of working with electronics including, but not limited to: industry standard safety procedures, general operations of electrical circuitry, and static electricity precautions.
Troubleshooting
46
Safety Instructions
Epson PowerLite S1 Series
3.3 Start-up Sequence Troubleshooting
C H E C K P O IN T
Always check the Epson Insider web site for the latest Support Bulletins for this product. Support Bulletins provide up-to-date supplemental information on how to troubleshoot and repair the product. Go to http://www.epsoninsider.com.
The following troubleshooting steps can be used with most Epson video projectors: 1. Plug the projector into AC power and listen for the power supply fan. 1.1 The power supply fan runs constantly while the projector is plugged into a live AC outlet. If the fan can be heard running, then the power supply in the projector is probably working properly (with very few exceptions). 1.2 If the fan does not begin to run when the projector is plugged in, check and replace the Power Supply. See Section 4.2.18 on page 82. Immediately after plugging the projector into AC power, the P Power Status indicator LED will briefly flash in an amber color, then will turn solid (constant) amber. Once the P Power Status LED is solid amber, the projector has checked main board functions and loaded its basic instruction set from ROM. In general, the main board is functional at this point and is not likely to be a cause of failure in the projector. If the Fan is running but the P Power Status LED does not light or does not stop flashing, the MA Board and Optical Engine need to be replaced. See Section 4.2.11 on page 73 and Section 4.2.21 on page 88. Once the Power Status LED is amber and not blinking, the projector is in sleep mode - it has performed power on diagnostics. The projector is ready to be powered on with the [Power] button on the remote control or the control panel of the projector. This will activate the power-on sequence from the ROM instructions.
2. Observe the P Power Status LED. 2.1
2.2
2.3
3. Press the [Power] button and listen for intake and exhaust fans. The intake and exhaust fans start operating in high speed mode as soon as a power on request is made. This means the power on process has started properly. 4. Observe the P Power Status indicator. If the power status indicator is blinking green, the projector is warming up and trying to strike the lamp. 4.1 If the projector can be switched on with the Control Panel, but not the Remote Control, the Remote Control batteries need to be replaced. 4.2 Conversely, if the Remote Control powers on the projector, but the Control Panel does not, there is a problem with the Control Panel on the main unit. Try reconnecting the SW (Switch) Cable, or replace the SW Board Assembly. See Section 4.2.8 on page 71. If the Fans do not pick up speed when power is turned on, there is either a malfunction of one or more fans, or a malfunction of the MA Board. Observe the Status LEDs. A properly functioning MA Board can indicate a fan error on the Status LEDs: the mo Lamp Temperature indicator LED will flash red at 1 second intervals, and the P Power Status indicator will remain solid amber. If a fan error is indicated, check or replace the fans. See Section 4.2.14 on page 79, Section 4.2.20 on page 86 and Section 4.2.24 on page 91. 4.4 If the fans are slow and no error is indicated by the LEDs, replace the MA Board and Optical Engine.
47 Start-up Sequence Troubleshooting
4.3
Troubleshooting
Epson PowerLite S1 Series
5. Watch for light output. If there is no light output after approximately 40 seconds, observe the mo Lamp Temperature indicator. See the table below for error indication definitions and take the appr