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Warning Order No. TSD0807S006
This service information is designed for experienced repair technicians only and is not designed for use by the
general public. It does not contain warnings or cautions to advice non-technical individuals of potential dangers in
attempting to service a product. Products powered by electricity should be serviced or repaired only by experienced
professional technicians. Any attempt to service or repair the product or products dealt with in this service manual by
anyone else could result in serious injury or death.

Service Manual PT-LB80NTU PT-LW80NTU
PT-LB80NTE PT-LW80NTE
PT-LB80NTEA PT-LW80NTEA
PT-LB80U PT-BX20
PT-LB80E PT-BX20NT
PT-LB80EA PT-BX10
PT-LB75NTU PT-BW10NT
PT-LB75NTE PT-X500
PT-LB75NTEA PT-X600
PT-LB75U
PT-LB75E
PT-LB75EA

Subject : Cautions during servicing (parts replacements).

Please use this service information together with the Service Manual as follows :
Model No. Order No. Modification applied from
PT-LB80NTU/NTE/NTEA/U/E/EA VED0804386C0 -
PT-LB80NTU/NTE/NTEA/U/E/EA VED0804386C0 -
PT-LW80NTU/NTE/NTEA VED0805387A0 -
PT-BX10/BX20/BX20NT/BW10NT - -
PT-X500/X600 - -

Depending on the parts replaced during serving, it will be necessary to perform corrections of the "fan rotation
control circuit" and "filter clog sensor circuit". Please ensure that all service staff are familiar with the necessary
steps.

Corrections will be necessary under the following conditions.
*When TACH IC (IC1092) is replaced.
*When EEPROM (IC1017) is replaced.
*Circuit board A is replaced.
*Filter clog sensor (CF2002) is replaced.

Preparation
*PC with communication cable (Serial cable with D-sub 9 pin terminals).
*Service software Ver1.00 or higher.
Please download the service software from the projector service homepage website.
Contents of the corrections
PT-LB80 series / PT-LB75 series / PT-BX10/BX20 series / PT-X500/X600
PT-LW80 series / PT-BW10NT
MM Ver 1.08 MM Ver 1.09 or higher

When TACH IC *A main software upgrade is *A fan rotation correction is *A fan rotation correction is
(IC1092) is replaced necessary. necessary. necessary.

*Tasks must be carried out according *Tasks must be carried out according *Tasks must be carried out according
to the following sequence. to the following sequence. to the following sequence.
When EEPROM 1)Transfer of EEPROM data 1)Replace TACH IC (IC1092) 1)Replace TACH IC (IC1092)
(IC1017) is replaced 2)Software upgrade 2)Transfer EEPROM data 2)Transfer EEPROM data
3)Sensor correction 3)Fan rotation correction 3)Fan rotation correction
4)Sensor correction 4)Sensor correction

*Tasks must be carried out according
*Tasks must be carried out according to the following sequence.
When circuit board A to the following sequence.
1)Transfer EEPROM data
is replaced 1)Transfer EEPROM data
2)Sensor correction
2)Sensor correction

When filter clog
sensor (CF2002) *Sensor correction is necessary. *Sensor correction is necessary.
is replaced

Sequence of Procedure to carry out the correction tasks.

Procedure for fan rotation correction

1. Switch the projector to "Stand-by" mode (POWER indicator is in red).

2. Connect the serial terminals on the projector and the PC by using a communication cable.

3. Start up the service software(ServiceLB80E.exe) on the PC, click the "Adjustment" tab.

4. Click "Tach Ic Revision" to set the correction value.

*Only when TACH-IC(IC1092) or EEPROM(IC1017) has been
replaced, click "Tach Ic Revision" otherwise do not click it.
When "Tach Ic Revision" is clicked, it will be under guarantee
specially temperature effect.

5. Click "Exit" to complete the correction.
Procedure for sensor correction (Approx. 15 minutes to complete)

1. Clean the intake air filter completely before starting the steps.
(If the filter is dirty and clogged, the correction may not be completed properly.)
*If the filter is too dirty to clean, replace it with a new one.

2. Correct the serial terminals on the projector and the PC by using a communication cable.

3. Press the POWER button of the projector. Power indicator lights.(It is not necessary to enter the input signals.)
*If the "Auto-signal search" is working, it must be turned OFF by using the control buttons.

4. Start up the service software(ServiceLB80E.exe) on the PC, click the "Adjustment" tab.

5. Click "FLTR Sensor" to start the filter clog correction.
(If the correction does not start automatically, tuen OFF the projector, disconnect/connect the power cable and
restart it to repeat the steps.)

"Sensor correction" window

*While the correction is in progress, the window is
magenta (for approx. 15 min).
*While the correction is in progress, do not exit from
the adjustment software or from the PC.
Do not turn off the POWER of the projector.
Don't turn power off during revising it will be not effect.

6. In approx. 15 minutes, the "Sensor correction" window closes automatically.
This completes the correction.
Click "Exit" to complete the correction steps.