TM 10-6630-245-13&P
Table 4-1. Unit Troubleshooting - Continued.
PROCEDURE 4-3. Power On (ZERO ADJUST) Works But LIGHT ADJUST Does Not Work.
Inspect Lamp By Holding a Piece of Paper in the Sample Well. If Lamp Is Working, Light Image Will Be Visible On
Paper.
Light Image Visible.
Light Image Not Visible.
Check Photocell. Use Procedure in Para 4.4.
Replace Lamp Assembly. Use Procedure in Para 4.3.
Photocell Working.
Photocell Not Working.
Spectrophotometer
Spectrophotometer
Working.
Not Working.
Replace
Replace Photocell.
,
Spectrophotometer.
Use Procedure in Para 4.4.
Replace
Spectrophotometer.
Spectrophotometer
Spectrophotometer Not
Working.
Working.
Replace
Spectrophotometer.
PROCEDURE 4-4. Spectrophotometer Suspected to Give Results That Are Too High, Too Low, or Erratic.
Check Photocell. Use Procedure in Para 4.4.
Check Lamp. Use Procedure 4-3 Above.
Photocell Not Working.
Photocell Working.
Lamp Working.
Lamp Not Working.
Replace Photocell.
Replace Lamp Assembly.
Use Procedure in Para 4.4.
If Both Lamp And Photocell are
Use Procedure in Para 4.3.
Working Correctly, Replace
Spectrophotometer.
Spectrophotometer
Spectrophotometer
Working.
Not Working.
If Both Photocell and Lamp Assembly Have
been Replaced, Replace Spectrophotometer.
4-3
