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Before Starting Troubleshooting Procedures
4.1
1. Whenever you replace a unit or block for maintenance purposes, double-check the
replaced unit or block is defective (to determine whether the problem was due to a
poor cable connection).
2. If you find questions you want to check while examining the flowchart, be sure to
check those items during the troubleshooting procedure.
3. Refer to the instructions given
replacing an LCP component unit.
4. Before making a functional check, be sure to check for proper connection.
5. After replacing one of the units listed below, make adjustments explained in Chapter
5.
Name
No.
1
Light valves
G, and B
2
head unit
3
4
board
5
board
6
on the main board
6. After conducting troubleshooting items, make functional checks using the image
adjustment program explained in Chapter 5 and verify that the problem has been
solved.
Tools and Accessories Required for Troubleshooting
The tools and accessories required for LCP troubleshooting (including fault isolation)
are listed below. They need to be prepared by the user.
Name
Quantity
Projector screen
Rule (3 m)
Small-size mirror
Host computer
Color display
Video equipment
External speaker unit
Test program floppy
Multimeter
Tool set
llluminometer
Color meter(chronometer) 1
Field Replacement Parts
The parts that need be replaced during troubleshooting such as board, cases, plates,
and screws, refer to the parts list listed in an appendix of this manual.
in Chapter
3, "Disassembly and Assembly," when
1
To project images
1
To measure the projection distance
1
To check the optical
1
mirror with a diameter of approx. 2 cm)
1
To supply test patterns (PC (AT) compatible)
1
To manipulate and display on host computer
1
To test source 2 (video input)
(video deck, video camera, etc.)
1
To test voice output (with audio cable terminals)
1
To adjust image quality
1
To measure resistance and voltage (AC/DC)
1 set
Tools and accessories listed in Section 3.1
1
To measure illuminance
To measure
G, and B components
4-1
Use/Remarks
(digital mirror or round
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