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LHD700
SERVICE MANUAL
020-000423-02
FILE NO.
SERVICE MANUAL Multimedia Projector Model No. LHd700
U.S.A, Canada,
Europe
original Version
* Projection lens is optional.
chassis No. 103-034108-01-00
Match the Chassis No. on the rating label of the projector
with the Chassis No. in the Service Manual.
If the Original Version Service Manual Chassis No. does
not match the projector's, additional Service Literature is
required. You must refer to "Notices" to the Original Ser-
vice Manual prior to servicing.
Product code
LHD700 Service Manual
1 122 571 29 (KY2KL) 020-000423-02 Rev.1 (01-2013) REFERENCE NO. SM5111373-00
Contents
SERVICE MANUAL ....................................................... 1 LCD drive stage ........................................................ 74
Contents ........................................................................ 2 Lamp control stage ................................................... 75
Safety Instructions......................................................... 3 Fan control stage ...................................................... 76
Safety Precautions ..................................................... 3 Motor control stage ................................................... 77
Product Safety Notice................................................. 3 Bus control stage ...................................................... 78
Service Personnel Warning ........................................ 3 LED drive & RC control stage................................... 79
Specifications ................................................................ 4 Power supply & power failure circuit......................... 80
Circuit Protections ......................................................... 5 Indicators and Projector Condition ........................... 81
Fuse ............................................................................ 5 Power failure detection system ................................ 84
Thermal protector (SW905) ........................................ 5 Error information table .............................................. 84
Mechanical sensor switches (SW1891,SW1861)........ 6 Power failure detection tree ...................................... 85
Temperature sensors, wind sensors .......................... 7 Error History Log ...................................................... 87
Power failure and fan lock detection .......................... 8 Diagnosis of Power Failure with RS-232C port ........ 88
Maintenance .................................................................. 9 Diagnosis procedure ................................................ 88
Replacing the filter cartridge ...................................... 9 Serial Control Interface............................................. 89
Resetting the filter counter ....................................... 10 Control Port Functions................................................. 91
Resetting the scroll counter ...................................... 10 System Control I/O Port Functions (PW392, IC301) 91
Lamp Replacement .................................................. 11 I/O Expander (TE7783, IC4801) .............................. 92
Resetting the lamp counter ...................................... 12 FPGA (XC3S50A, IC5201) ....................................... 93
How to check lamp used time .................................. 12 IIC Bus D/A Converter (M62393FP Fan Control,
Cleaning ................................................................... 13 IC7801) ..................................................................... 93
Quick maintenance................................................... 14 IC Block Diagrams....................................................... 94
Security Function Notice ............................................. 15 Mechanical Parts List ................................................ 101
Mechanical Disassembly............................................. 16 Cabinet Parts Location ........................................... 101
Mechanical disassembly flow chart .......................... 16 Mechanical Parts List ............................................. 108
Mechanical disassembly .......................................... 17 Electrical Parts List .....................................................110
Optical Parts Disassembly .......................................... 29 Electrical Parts Location ..........................................111
Adjustments................................................................. 39 Electrical Parts List ..................................................112
Adjustments after parts replacement ....................... 39
Note on main board replacement ............................. 39 Diagrams & Drawings.................................................. A1
Optical Adjustments .................................................... 40 Parts description and reading in schematic diagram ..A2
Contrast adjustment ................................................. 40 Pin description of diode, transistor and IC ................ A17
Electrical Adjustments ................................................. 41 Note on Soldering...................................................... A18
Service Adjustment Menu Operation ....................... 41 Schematic Diagrams ...................................................A3
Memory IC (IC1387) Replacement ........................... 41 Printed Wiring Board Drawings ................................. A13
Circuit Adjustments .................................................. 42
Test Points and Locations ........................................ 46
Service Adjustment Data Table ................................ 47
Chassis Description .................................................... 72
Chassis over view ..................................................... 72
Input & signal processing stage ............................... 73
-2- LHD700 Service Manual
020-000423-02 Rev.1 (01-2013)
Safety Instructions
Safety Precautions
WARNING:
The chassis of this projector is isolated (COLD) from AC line by using the converter transformer. Primary side
of the converter and lamp power supply unit circuit is connected to the AC line and it is hot, which hot circuit is
identified with the line ( ) in the schematic diagram. For continued product safety and protection of per-
sonnel injury, servicing should be made with qualified personnel.
The following precautions must be observed.
ment covers or shields, barriers, etc.
1: An isolation transformer should be connected in
the power line between the projector and the AC DO NOT OPERATE THIS PROJECTOR WITHOUT
line before any service is performed on the projec- THE PROTECTIVE SHIELD IN POSITION AND PR
tor. OPERLY SECURED.
2: Comply with all caution and safety-related notes 4: Before replacing the cabinet cover, thoroughly
provided on the cabinet back, cabinet bottom, inside inspect the inside of the cabinet to see that no stray
the cabinet or on the chassis. parts or tools have been left inside.
3: When replacing a chassis in the cabinet, always Before returning any projector to the customer, the
be certain that all the protective devices are service personnel must be sure it is completely safe
installed properly, such as, control knobs, adjust- to operate without danger of electric shock.
Product Safety Notice
Product safety should be considered when a component replacement is made in any area of the projector.
Components indicated by mark ! in the parts list and the schematic diagram designate components in which
safety can be of special significance. It is, therefore, particularly recommended that the replacement of there
parts must be made by exactly the same parts.
Service Personnel Warning
Eye damage may result from directly viewing the light produced by the Lamp used in this equipment. Always
turn off Lamp before opening cover. The Ultraviolet radiation eye protection required during this servicing.
Never turn the power on without the lamp to avoid electric-shock or damage of the devices since the stabilizer
generates high voltages (15kV - 25kV) at its starts.
Since the lamp is very high temperature during units operation replacement of the lamp should be done at least
45 minutes after the power has been turned off, to allow the lamp cool-off.
LHD700 Service Manual -3-
020-000423-02 Rev.1 (01-2013)
Specifications
Mechanical Information
ProjectorType Multi-mediaProjector
Dimensions(WxHxD) 14.56"x7 .36"x17 .32"(370.0mmx187.0mmx439.9mm)
NetWeight 25.6lbs(11.6kg)
FeetAdjustment 0