Armasight NAMPVS700133DB1 PVS7 GEN 3 Bravo Night vision goggles - Manual (Page 37)

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4.3 MAINTENANCE
4.3.1 GENERAL
The section regarding PVS-7 operator maintenance consists of operational tests, inspections for unit
serviceability, cleaning and mounting procedures, troubleshooting, and replacement instructions for
a limited number of parts. Maintenance instructions covered elsewhere in this manual (PMCS, trouble-
shooting, etc.) are not repeated in this section.
CAUTION:
The PVS-7 is a precision electro-optical instrument and must be handled carefully. Do not
scratch the external lens surfaces or touch them with your fingers.
If necessary, clean the goggles with water and dry them thoroughly. Clean lenses with lens paper (and
water if necessary, except for demist shields)
CAUTION:
Wiping demist shields with lens paper while wet can damage the coating.
4.3.2. HEAD MOUNT MAINTENANCE
A. Brow Pad Replacement. Replace the brow pad when cracked, torn or contaminated. Perform the
following procedure to remove and replace the brow pads.
CAUTION:
For protection of the image intensifier, disconnect the PVS-7 from the head mount prior to
replacing brow pads.
1. Firmly grasp the head mount and remove the old brow pad.
2. Gently press on the new brow pad. Lightly smooth out any wrinkles in the new brow pad.
B. Neck Pad Reinstallation. When operating the device, it is possible for the neck pad to become
separated from the headband. Perform the following to reinstall the neck pad.
1. Lift the upper headband strap retention tab (see Figure 4-6). This will allow the neck pad strap to be
inserted underneath.
2. Slip the neck pad strap all the way under the upper strap retention tab and then pull the lower part
of the neck pad strap under the lower strap retention.
lower Strap
retentIon tab
lower Strap
retentIon tab
lower Strap
retentIon tab
FIGURE 4-6. RE-INSTALLING THE NECk PAD