TM 10-6630-245-13&P
CHAPTER 4.
UNIT MAINTENANCE INSTRUCTIONS.
Page
Section I
Unit Lubrication ......................................................................................
4-1
Section II
Unit Troubleshooting ...............................................................................
4-1
4.1
General ..................................................................................................
4-1
Section III
Unit Maintenance Procedures .................................................................
4-4
4.2
Fuse Replacement ..................................................................................
4-4
4.3
Lamp Replacement ................................................................................
4-4
4.4
Photocell Replacement ...........................................................................
4-6
SECTION I. UNIT LUBRICATION
Lubrication not required.
SECTION II. UNIT TROUBLESHOOTING
4.1. GENERAL.
All unit troubleshooting and maintenance should be proceeded by maintenance and troubleshooting in accordance with
operator maintenance (Chapter 3) and the PMCS in Table 2-1. If problems are not fixed by operator maintenance
procedures, then unit maintenance actions should be performed as described in this chapter and by authorized persons.
The only component of the WQAS-PM requiring maintenance support at the unit level is the Spectrophotometer.
Troubleshooting described here is intended to help isolate the cause of malfunctions of the Spectrophotometer to one of
the replaceable assemblies. Replaceable assemblies for the Spectrophotometer are as listed below.
UNIT MAINTENANCE
SUMMARY OF SPECTROPHOTOMETER REPLACEMENT/REPAIR ACTIONS
ASSEMBLY
ACTION TYPE
PART NUMBER
Lamp Assembly
Replaceable
G-10-0031
Fuse
Replaceable
MIL-F-15160
Photocell Assembly
Replaceable
MSI- 1108-1
If a fault cannot be isolated to one of the replaceable assemblies, the entire Spectrophotometer should be replaced.
SPECTROPHOTOMETER UNIT MALFUNCTION SYMPTOM INDEX
TROUBLESHOOTING
MALFUNCTION
PROCEDURE (TABLE 4-1)
Spectrophotometer not operative under dc power ..................................................................... Procedure 4-2
FUSE
Spectrophotometer not operative under ac power (ZERO ADJUST control does not work) ........ Procedure 4-1
LAMP ASSEMBLY
Power on (ZERO ADJUST) works, but LIGHT ADJUST control does not work .......................... Procedure 4-3
Spectrophotometer suspected to give results that are too high, too low, or erratic ..................... Procedure 4-4
PHOTOCELL ASSEMBLY
Power on (ZERO ADJUST) works, but LIGHT ADJUST control does not work .......................... Procedure 4-3
Spectrophotometer suspected to give results that are too high, too low, or erratic ..................... Procedure 4-4
4-1
