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Canon LV-7105E/D78-5133, LV-7105U/D78-5132 service manual 4-13

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Part 4: Troubleshooting

4-13

TP561

S&H

B-INTPUT

TP571

TP1571

S&H

B-OUTPUT

TP505B

TP506B

S&H

B-OUTPUT

Contents

Main SERVICE MANUAL Page Page Page PREFACE 1. Service Manual Composition 2. Model Differences 3. Tools & Test Equipment 1) General Purpose Tools 2) Test Equipment (Local Purchase) 3) Other Equipment (Local Purchase) 4) Chart/Software (Attached with this manual) II CONTENTS Part 1: General Information III Part 2: Repair Information Part 3: Adjustment IV Page Page Page Page 1. FEATURES 1.1 Development objectives Fig. 1-1 LV-7105 1-1 1.2 Major Features 1-2 1.3 LV-7105 Features (Details) 1-3 1-4 1-5 2. LV-7105 SPECIFICATIONS 2.1 Main unit 2.2 Connectors 2.3 Accessories 1-6 2.4 Other specifications 3. NOMENCLATURE 3.1 Main unit Fig. 1-2 1-7 3.2 Top controls Fig. 1-3 1-8 3.3 Rear panel terminals Fig. 1-4 COMPUTER IN 1-9 S VIDEO 3.4 Computer Input terminal Fig. 1-6 1-10 3.5 Control port connector Fig. 1-5 3.6 Remote control Fig. 1-7 1-11 3.7 Operating range Fig. 1-8 1-12 4. COMMENTARY 4.1 External appearance design 1-13 4.2 Projection lens 4.3 Hybrid gamma correction 4.4 Fan speed control 1-14 Page 5. CONNECTING 5.1 Connection to the computer Fig. 1-10 MAC Adapter AUDIO OUT 5.2 Connecting to the video equipment 1-17 Video Source (example) Fig. 1-11 6. SETTING-UP THE PROJECTOR 6.1 Positioning the projector Fig. 1-12 1-18 6.2 Installation precautions Page 7. SUPPORTED COMPUTER SYSTEM MODE Table 1-1 1-20 Page Page 1. SAFETY INSTRUCTIONS 2-1 2. CIRCUIT PROTECTIONS 2.1 Fuse Fig. 2-2 [How to replace the fuse] 2.2 Thermal Switch 2.3 Warning Temperature and Power Failure Protection Possible causes Fig. 2-3 2.4 Air Filter Care and Cleaning 2-3 2-4 3. MECHANICAL DISASSEMBLIES 3.1 Cabinet Top Removal Fig. 2-5 3.2 Cabinet Front and Speaker Removal 2-5 Page 3.5 AV and Component Board Removal Fig. 2-8 3.6 Line Filter Board Removal 2-7 Fig. 2-9 3.7 Lamp Ballast Unit Fan (FN905) Removal Fig. 2-10 3.8 Power Board Removal Fig. 2-11 2-8 3.9 Optical Unit and Fan (FN901) Removal Fig. 2-12 3.10 Audio Amp. Board Removal 2-9 3.11 Fans (FN902, FN903, FN904) Removal 3.12 AC Inlet Assy Removal 2-10 Fig. 2-14 Fig. 2-15 4. OPTICAL PARTS DISASSEMBLIES 4.3 Integrator Lens Assy Disassembly Fig. 2-18 Fig. 2-19 4.4 Relay Lens Assy Disassembly 2-12 4.5 Polarized Glass-in Assy Disassembly 4.6 Polarized Glass-out Assy Disassembly 2-13 Fig. 2-20 Fig. 2-21 Page 5. LCD PANEL/PRISM ASSY REPLACEMENT 5.1 LCD Panel/Prism Assy Removal 2-15 Fig. 2-23 5.2 Note on LCD Panel/Prism Assy Mounting Mounting Procedure Fig. 2-24 2-16 6. CLEANING Cleaning with air spray Disassembly cleaning 2-17 2-18 7. LAMP REPLACEMENT Fig. 2-25 Procedure How to reset the lamp replacement monitor timer Service Parts No.: DY4-6108-000 Description: Lamp Assy LV-LP10 Lamp Age 0123 Hours Page Page Page 1. BEFORE ADJUSTMENTS 3-1 Caution to memory IC replacement Caution of Main Board replacement (in the case IC302 is not defective) 1.1 Adjustments after Parts Replacement 3-2 Disassembly / Replaced Parts Electrical Adjustments Optical Adjustments 1.2 Service Adjustment Menu Operation To enter the service mode 3-3 To adjust service data To return to the normal mode 1.3 Service Conditions Fan Control Setting Procedure 3-4 Service Conditions: 1.4 3-5 Service Adjustment Data Table No. Adjustment Item RangeInitial Value Description 3-6 No. Adjustment Item RangeInitial Value Description 2. ELECTRICAL ADJUSTMENTS [Adjustment condition] 2.1 Output Voltage Adjustment 2.2 Fan Voltage Adjustment 3-7 2.3 PC-Offset Adjustment 2.4 PC Gain Adjustment 2.5 Component Gain Adjustment 2.6 AV Gain Adjustment 2.7 PSIG Adjustment 2.8 Signal Center Adjustment 2.9 PC/AV Gamma Off Adjustment 2.10 PC/AV-Video Adjustment-1 2.11 PC/AV-Video Adjustment-2 2.12 S/H Clock Adjustment 2.13 Common Center Adjustment 2.14 White Balance Adjustment 2.15 Black Balance Adjustment [PC black balance adjustment] [AV blackbalance adjustment] 2.16 Note on White Uniformity Adjustment 3-15 3. OPTICAL ADJUSTMENTS Fig. 3-11 3.1 Contrast Adujstment [Before adjustment] [R/G/B-contrast adujstment] 3.2 Integrator Lens Adujstment [Before adjustment] [Adjustment]] 3-17 3-18 Fig. 3-13 Fig. 3-14 3.3 Relay Lens Adjustment 4. TEST POINTS AND LOCATIONS Main Board Fig. 3-16 3-20 D652 Page Page 1. TROUBLESHOOTING 1.1 No Power 4-1 1) Periphery of chassis 2) Power board 3) Main board 4) Component board 4-2 Page 4-4 INDICATOR Fig. 4-1 IC301 SYSTEM CONTROL IC1806 7 control P.F.C. Interlock switch LAMP.DET LAMP SW. Switching power supply 1.2 No Sound 1) Main board MAIN BOARD Fig. 4-2 4-6 1.3 No Picture 1) AV board 2) Main board 4-7 4-8 Fig. 4-3 Cr/Pr Cb/Pb MAIN BOARD 2. CONTROL PORT FUNCTIONS 2.1 System Control & I/O Port Functions 4-9 4-10 4-11 3. WAVEFORMS 4-12 4-13 Page Page Page Page Page Page MB40988PFQ<D/A COnverter, IC2200> 4-20 AV9155C <PLL, IC1961> Page Page Page Page Page Page Page 1 CANON LV-7105J REF. No. D78-5131 LV-7105U D78-5132 LV-7105E D78-5133 Page 1 * * * Page 2 * (77) Page 3 Page 4 Page Page * Page 6 PARTS LIST Page Page Page Page 1. PARTS DESCRIPTION AND READING IN SCHEMATIC DIAGRAM Coil Reading 6-1 Capacitor Reading 6-2 Diode/Transistor Type Reading Example 1/2 D J 10K B Example 6 W K 8.2 Example 1/2 C K 1M Resistor Reading 2. PIN DESCRIPTION OF DIODE, TRANSISTOR AND IC Index 6-3 Index Index K: Cathode A: Anode C: Collector B: Base E: Emitter Circuit Block Diagram (LV-7105U/LV-7105E) A1 IC1809 LAMP REP LED MUTE LAMP REP LED R-LCD Power Supply Lines (LV-7105U/LV-7105E) A2 ASSY PWB, AV 12V ASSY PWB, TEMP Schematic Diagrams LV-7105U/E A3 F.G. VR01 ASSY,PWB,POWER MP6A SERVICE AV BOARD 12 3 4 5 6 7 8 9 10 11 12 13 14 15 16 A4 TC7W53FU-(TE12L) -9.5V SYNC SEPARATOR COMPOSITE INPUT IC6101 LC24193AT-TH5 DIGITAL RGB MATRIX SCAN CONVERTER IC301 GHS GVS (IC301) 123456 7 A6 1.7V RC "K3R" IC1401 LT1206CS8 "K3G" IC1501 CXA3512R R-SAMPLE BOARD "K3A" 6VD A8 6VD 15.5V FN905 COMPONENT BOARD 15.5V1 G B 15.5V S5V Printed Wiring Board Diagrams (LV-7105U/E) CAUTION