Optoma H76 User manual

Model Name : H76
SERVICE MANUAL
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Prepared by SI :
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Prepared by TSE :
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C eck by :
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Approved by :
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Copyrig t July, 2003 . All Rig ts Reserved
Document #866-G04-01A . P/N: 36.86604.001

This manual is applied to H76 TI 0.79 DMD / 12deg / 1280x720 / XGA Home Theater Projector
with digital imaging functionality based on Digital Micro-mirror Device (DMD) technology. Its the
mode of single Panel, 250 watt Philips UHP lamp and 1280(H) x 720(V) resolution. The manual
gives you a brief description of basic technical information to help in service and maintaining the
product.
Your customers will appreciate the quick response time when you immediately identify problems
that occur with our products. e expect your customers will appreciate the service that you offer
them.
This manual is for technicians and people who have an electronic background. Send the product
back to the distributor for repairing and do not attempt to do anything that is complex or is not
mentioned in the troubleshooting.
NOTICE :
The information found in this manual is subject to change without prior notice. Any subsequent
changes made to the data herein will be incorporated in further edition.
Copyright 2003, July
All Rights Reserved
Manual Version 1.0
Document # 866-G04-01A
Preface
H76I

H76II
Table of Contents
Chapter 1 ntroduction 1-1
Product Hig lig ts 1-1
Mac anical Specifications 1-2
Electrical Specifications 1-2
Optical Specifications 1-3
Environmental 1-4
Chapter 2 Disassembly Procedure 2-1
Disassemble Lamp Module 2-1
Disassemble Top Cover 2-2
Chapter 3 Troubleshooting 3-1
Equipment Needed 3-1
Main Procedure 3-1
Chapter 4 Function Test and Alignment Procedure 4-1
Product 4-1
Test Equipment 4-1
Test Condition 4-1
Test Display Modes & Pattern 4-2
Inspection Procedure 4-6
Chapter 5 Firmware Upgrade Procedure 5-1
Equipment Needed 5-1
Setup Procedure 5-2
Firmware Upgrade Procedure 5-3
Chapter 6 DDC Key-in Procedure 6-1
Equipment Needed 6-1
Setup Procedure 6-2
DDC Key-in Procedure 6-3
Chapter 7 Appendix 7-1
Serial number system definition 7-1

H761-1
Chapter 1
Introduction
1-1 Product Highlights
- One 0.79" Mustang DMD projection system with700 ANSI umen (Min-Engineering
spec), 80% uniformity minimum (ANSI)
- Contrast (FOFO) : 1400 : 1 (Min Engineering spec)
- 250 Watt Phi ips UHP Lamp 1500hrs (user rep aceab e)
- High efficiency coo ing system with system acoustic noise eve 30dBA ( Average )
- Lens Up/Down 100% Shift construction
- 4 Adjustab e Feet
- Dimensions : Externa Max size 430mm x 305mm x 135mm (without s iding cover)
- Power focus projection and power zoom ens 1.35X
- RGB co or whee spinning at 120Hz (TBD)
- Computer capabi ity up to UXGA 60Hz for Ana og & SXGA 60Hz for Digita Inputs
- NTSC/PAL/SECAM video capabi ity with S-video / composite / component, and HDTV
(480i/p, 576i/p, 720p, 1080i)
- Separate y R/G/B/H/V BNC input supported.
- Auto detection of computer signa input.
- Auto Image.(Auto-tracking /frequency /position adjustment)
- Automatica y saves adjustments for future use
- On-screen menu with 9 anguages
- On Screen amp ife timer
- One DVI PC-data input ( Inc uding Ana og and Digita RGB signa )
- Wire ess remote contro er
- Adaptive vo tage contro fan speed.
- Support HDCP function

H761-2
1-2 Mechanical Specifications
- Dimensions(WxHxD) - 16.9(W) x 12.0(D) x 5.3(H) inches ( 430 x 305 x 135 mm)
- Weight : < 16.5 bs. ( 7.49 Kg )
- Coo ing System - Advanced Air F ow
Three motor FANs with system acoustic 30dB(A) (Average)
Temperature contro circuits with Fan speed
- Cabinet : Provides space for PCB boards, FAN, optica engine, power supp y,
- Co or : Ivory white or ebony b ack
- Lamp Door Protection : Lamp Power Supp y shut off automatica y when door open
1-3 Electrical Specifications
Power Supp y Universa AC 90264V~ 50-60 Hz with PFC input
250W for Phi ips UHP Lamp @ norma operation
Input signa spec. - Hsync Frequency 31.5 ~ 100 kHz
- Vsync Frequency 43 ~ 85 Hz
- Video Signa RGB (PC)
Ana og RGB 0.7Vp-p, 75 ohm
Ana og RGB 1Vp-p, 75 ohm, Sync. Signa
Separate TTL H,V Sync.
Composite TTL Sync.
- Video
Composite video 1Vp-p,75 ohm
S-video Luminance 0.714Vp-p,75 ohm
Chrominance 0.286Vp-p,75 ohm

H761-3
1-4 Optical Specifications
- Projection ens : f = 28.3 ~ 38.2 mm, F/2.4, 1.35X Manua Zoom Lens.
- Projection Image Size : 21  to 282  Diagona
- Throw Distance : 3.28 ft to 32.80 ft/ 1.0 m to 10m.
- Throw Ratio : 1.6~2.16 (Projection Distance/Image Width)
- Brightness : Typica 800 m /Minimum 700 m
- Contrast : Typica 1600:1 /Minimum 1400:1
- Uniformity : Typica ANSI 85% /Minimum 80%
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"47.87/'65.6/m0.2"64.65/'7.4/m34. "38.4/'94.3/m60.
"58.69/'4.6/m0.5"6.4/'67./m95.3"65.40/'7.8/m76.2
"7.393/'8.23/m0.0 "23.282/'35.32/m7.7"3.902/'34.7/m3.5
1-5 En ironmental
- Temperature Operating : -5°C  35°C
Storage : -10°C  60°C
- Maximum Humidity Operating : -5°C  35°C , 80%RH (Max.), non-condensing
Storage : -10°C  60°C , 80%RH (Max.), non-condensing
- Acoustic noise eve 30 dB(A) Standard (Typica , Under 23+/-2oC), noise measure-
ment fo ows ISO 7779, A-weighted sound pressure eve mea-
surement
- Unit temperature imitation : Temperature of externa parts
- Lamp ife 1500 hours min. , 50% survia rate
- A titude Operating : 0~2,500 ft 5°C~35°C
2,500~5,000 ft 5°C~30°C
5,000~10,000 ft 5°C~25°C
Storage : < 40,000 ft
- MTBF Operating more than 10,000 hrs (80% confidence eve )
- Re iabi ity Test Refer 07- 2016 Re iabi ity Test Procedure ;

H762-1
Chapter 2
Disassembly Procedure
2-1 Disassemble Lamp Module
1. Unscrew 1 screw to remove Lamp Cover from inside to outside, then pull it up.
2. Loosen 3 screws to remove Lamp Module.


1

2

H762-2
1. Remove 8 screws from the ottom for the top cover.
Remove the FFC ca le when you pull up the top cover.
2-2 Disassemble Top Cover
2. Remove 2 screws from the Top Cover.
3. Remove 4 hex screws and then take off I/O Panel
1
2
3




1

H762-3
5. Remove 9 screws (85.1A623.060).
6. Remove FFC ca le (42.85801.001) from Keypad to M/B.
7. Remove 4 screws (85.1A623.060) from Thermal Board and remove 9 hex screws (61.
86627.001) and 9 springs (61.87208.001) from Main Board.
8. Remove 4 Flat screws (85.4A323.050) from Lamp Housing Holder (51.86604.001).

H762-4
10. Remove 2 screws (85.1A623.060).
11. Remove 4 screws (85.1A623.060).
9. Unplug 9 wires from Thermal Board.
To Axial Fan
(3 Pin white CNNT)
To Photo Sensor
(3 Pin white CNNT)