Hamamatsu Photonics LIGHTINGCURE LC8, Instruction Manual

34

Before requesting repair, check the following points to determine whether you can correct the problem yourself.

If the symptom remains unsolved even after checking each of the above items, describe the trouble specifically and 
send the unit to the nearby sales office. (Refer to page 56 for the address.)

Troubleshooting

Power cannot be 

turned on.
Lamp fails to light. 

Shutter doesn’t 

open.
Light output is 

poor.

Lamp error is indi-

cated (

LAMP ERR.

)

(when Optical Feed-

back Unit is used)
Setting  for  output 

intensity cannot be 

made.

Output intensity in-

dicated  by  UV  me-

ter differs from that 

on light source. 

(when Optical Feed-

back Unit is used)

The interlock has been activated.

Accumulated  lamp  operation  time  has  ex-

ceeded 5000 hours. 
Lamp life has ended. (When used for longer than the 
assured lamp life, the lamp becomes hard to turn on.)
The lamp is not installed properly.
Communication with PC is effective.
Solenoid is defective.
Lamp life has ended. 
The  output  intensity  has  been  adjusted  (re-

duced more than necessary).
The  input/output  ends  of  the  light  guide  are 

dirty.
The lamp is not installed properly.
Lamp output has reduced and the set output 

intensity is not available.

No lamp stable signal is output.

Shutter is not open.
There is an error of ±5% (typ.) attributable to 

the performance.
Output  intensity  adjustment  was  not  made 

after unpacking.
Light guide has been replaced.
Lamp has been replaced.
Light  in/out  end  of  light  guide  has  become 

dirty and output intensity has been reduced.

Sensitivity of optical sensor has been deterio-

rated due to consumed service life, etc.

Symptom

Cause

25

25, 27

27

25

32, 33

–

27

30, 31

24

25

25, 30

29

29

–

32

32

32

24, 32

–

Page for 

reference

Firmly close the lamp cover.

Replace the lamp with a new one and re-

set the accumulated lamp operation time.
Replace the lamp with a new one.

Tighten the lamp fixing cap securely.
Cancel communication with PC
Replace the shutter unit.
Replace the lamp with a new one.
Adjust the intensity.

Wipe  the  end  faces  of  the  light  guide 

clean with a gauze soaked with alcohol.
Tighten the lamp fixing cap securely.
Lower  output  intensity  setting  value  or 

replace lamp with a new one.

Wait until lamp stable signal is output (for 

about 5 minutes).
Open shutter.

Adjust output intensity.

Adjust output intensity.
Adjust output intensity.
Using  gauze  dampened  in  alcohol,  re-

move  dirt  from  end  face  of  light  guide 

and adjust output intensity.
Replace Optical Feedback Unit.

Correction

When sending the unit, pack it carefully and securely to prevent any possible damage during transpor-
tation. (Use the box in which the unit was delivered or a larger size box and fill it with cushion material.)

Caution

Maintenance and Inspection

Perform maintenance and inspection as described below periodically to ensure safe use of this unit.

•  Read Instruction Manual supplied with the unit carefully to ensure correct use of the light source unit.
•  If something wrong is suspected with operation of the unit, refer to the section of trouble diagnosis.
•  When the unit is exposed to water or oil gets into it, insulation may be deteriorated, causing an electric shock or a fire. Also, de-

teriorated insulation will lead to malfunction of the lamp (e.g, lamp failure to turn on). If the unit gets wet or dirty with oil or dust 
excessively, stop using the unit and contact Hamamatsu Photonics.

•  When cleaning this unit, wipe it lightly with a dry cloth.
•  Dirty tip of the light guide hinders proper light output. Check the light guide periodically for contamination. When the input/output 

end of the light guide gets dirty, clean the dirt off from the light guide end face with gauze damped with alcohol.

•  The lamp is a consumable. As it is used for a long time, its output intensity will be deteriorated. It is recommended to replace it 

early. Also, when the accumulated lamp operation time exceeds 4000 hours (L8253:3000 hours), replace the lamp with a new 
one regardless of the output intensity condition. If the lamp is used for longer than 4000 hours (L8253:3000 hours), there is a 
risk of its bursting.