TM 5-3610-257-14
3-20.2
. Check/Replace 2D21 and/or OB2 Tube(s).
MOS:
35E, Special Electronic Devices Repairer
TOOLS:
Flat Tip Screwdriver
SUPPLIES:
2D21 and/or OB2 Tube(s), (Thyratron or Regulator Tube)
Electronic Test Set
WARNING
Death or serious injury may occur from electrical shock unless power cord is unplugged before
servicing.
a.
Unplug exposure control instrument power cord.
b.
Remove rear cover retaining screws with rubber washers attached.
c.
Remove rear cover.
3-60
