TM 9-1240-216-34
CHAPTER 4
FAULT ISOLATION PROCEDURES
4-1.
SCOPE
This chapter gives step-by-step procedures to troubleshoot the fault symptoms found during checkout.
After you replace the part, do the checkout procedure in Chapter 2 again. This is to make sure the new
part has fixed the problem.
NO IMAGE (IN ONE OR BOTH EYEPIECES) WHEN POWER SUPPLY IS
4-2.
ON (SHEET 1 OF 5)
APPLICABLE CONFIGURATIONS: M19 and M24 old configurations
.
T E S T EQUIPMENT High voltage power supply (tank)
0-36 VDC power supply
High voltage cable
PERSONNEL: One
Using 0-36 VDC power supply
REFERENCES: JPG 41C for:
Using multimeter
EQUIPMENT CONDITION: Body assembly on work bench with head assembly installed; power
PRELIMINARY PROCEDURES: Assemble power supplies (App B)
NOTE
This procedure is for both the M19 and M24 periscopes.
The M24 is pictured.
Para 4-1
4-1
Vol I
