Replacement Method – Noise related (FAN & Color wheel & circuit high frequency noise)
1). If it is decided that there is (abnormal) noise in the SET High possibility of defect FAN
a. Adjust remote controller In-start -> enter Fan control to verify information of each Fan.
b. Adaptive control Enable turn OFF, and adjust voltage by ± 1~2V for Fan suspected of high noise or for each FAN, and verify increase/decrease of noise.
c. If it is judged that noise is detected quickly by increase or decrease of certain Fan Voltage, disassemble SET and verify if there is any interfering object (cable or foreign object) around the Fan, and if none, replace with new FAN
d. Need to verify if it matches “FAN location and direction” information mentioned in the previous chapter during the replacement of FAN.
e. Perform b category again and check if it is enhanced.
2). If it could not be found by No. 1 category * High possibility of defect Color wheel
Case 1. Screen is normal
1. Turn on the SET, and remove power cord immediately.
2. After inserting the power cord and turning the SET ON, verify the noise occurrence when FAN rotates for about 1~2 min. and Lamp is turned on.
3. If noise occurs here, Color wheel defect is suspected (Refer to the previous chapter Part replacement – C/W, verify status and replace)
Case 2. Screen is abnormal or not displayed
1. Verify existence of noise by No. 1, 2 contents of Case 1
3. If noise occurs here , Color wheel defect is suspected (Refer to the previous chapter Part replacement – C/W, verify status and replace)
3). If it is a sharp high frequency noise while it is not Fan or C/W defect
It is mostly circuit Noise, and there is a possibility that it occurred by aging of Main board or certain parts of PSU, so CHECK this part in detail.
If it is not any of the above cases, high frequency Noise may occur due to the characteristics of LAMP, so replace LAMP if necessary.
You must replace following LAMP Replacement Process in this case).
1. Turn on the SET, and remove power cord immediately.
2. After inserting the power cord and turning the SET ON, verify the noise occurrence when FAN rotates for about 1~2 min. and Lamp is turned on.
3. If noise occurs here, Color wheel defect is suspected (Refer to the previous chapter Part replacement – C/W, verify status and replace)
Case 2. Screen is abnormal or not displayed
1. Verify existence of noise by No. 1, 2 contents of Case 1
3. If noise occurs here , Color wheel defect is suspected (Refer to the previous chapter Part replacement – C/W, verify status and replace)
3). If it is a sharp high frequency noise while it is not Fan or C/W defect
It is mostly circuit Noise, and there is a possibility that it occurred by aging of Main board or certain parts of PSU, so CHECK this part in detail.
If it is not any of the above cases, high frequency Noise may occur due to the characteristics of LAMP, so replace LAMP if necessary.
You must replace following LAMP Replacement Process in this case).
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Replacement Method – Main board ass'y
Disassembly
1. Remove Top cover (See SET Disassembly/Assembly)
2. Remove 4 Main Board Screws (No. 2 marked part)
- Separate various cables
3. Remove Main Board+AV Bracket at the same time.
2. Remove 4 Main Board Screws (No. 2 marked part)
- Separate various cables
3. Remove Main Board+AV Bracket at the same time.
Assembly
1. Insert to SET after combining MAIN ass'y + AV BRACKET
2. Reverse order of disassembly for the remaining procedure
Replacement Method – Engine ass'y
1. Insert to SET after combining MAIN ass'y + AV BRACKET
2. Reverse order of disassembly for the remaining procedure
Replacement Method – Engine ass'y
Disassembly
1. Remove Top cover & Main board ass‘y
2. Remove 7 Engine ass'y fixing Screws
3. Separate Engine ass‘y.
1. Remove Top cover & Main board ass‘y
2. Remove 7 Engine ass'y fixing Screws
3. Separate Engine ass‘y.
Assembly
1. Perform in the reverse order of disassembly
2. Work by referring to the below cabling.
1. Perform in the reverse order of disassembly
2. Work by referring to the below cabling.
Replacement Method – Projection Lens
Disassembly
1. Remove Top cover & Main board & Engine ass‘y
2. Remove 3 Projection Lens fixing Screws
3. Carefully remove Projection Lens
Be careful not to have foreign objects inside Engine
1. Remove Top cover & Main board & Engine ass‘y
2. Remove 3 Projection Lens fixing Screws
3. Carefully remove Projection Lens
Be careful not to have foreign objects inside Engine
Assembly
1. Insert Rubber to prevent foreign object in Projection Lens
2. Assemble in the reverse order of disassembly.
1. Insert Rubber to prevent foreign object in Projection Lens
2. Assemble in the reverse order of disassembly.
Replacement Method – Color wheel & C/W Board Replacement
Disassembly
1. Remove Top cover & Main board & Engine ass‘y
1. Remove Top cover & Main board & Engine ass‘y
2. Remove 4 Screws
3. Remove C/W ass'y
After removing 3 Screws
After removing 3 Screws
Assembly
1. Assemble in the reverse order of disassembly
But, be careful for the Rubber shape transform.
1. Assemble in the reverse order of disassembly
But, be careful for the Rubber shape transform.
Replacement Method – Color wheel & C/W Board Replacement
Disassembly
1. Disassemble C/W ass'y (see previous page)
2. After removing 2 Screws at No. 3, disassemble Board ass‘y.
1. Disassemble C/W ass'y (see previous page)
2. After removing 2 Screws at No. 3, disassemble Board ass‘y.
Assembly
1. After removing 1 Screw, replace with new C/W
1. After removing 1 Screw, replace with new C/W
Replacement Method – TEC ass'y (only for BX503B, GX513)
Disassembly
1. Disassemble Engine ass'y
1. Disassemble Engine ass'y
2. Remove 5 Screws
Assembly
1. Assemble in the reverse order of disassembly
No. 2 part Thermal Grease shall be sprayed enough.
1. Assemble in the reverse order of disassembly
No. 2 part Thermal Grease shall be sprayed enough.
Connector details
Adjust remote control.
You should have an adjust remote control of LG, to enter the service mode to these projectors. Adjust remote control can be bought from any authorized service center for LG. These adjust remote controls are used to enter the service mode of, TVs, VCRs, Audio systems of LG.
Adjust its service parameters.
